Chemical and Mechanical Recycling of Tires

A thermoplastic rubber composition and vulcanizate material that can replace thermoset rubber in applications like tires, belts, and hoses. The composition contains a low melting point polyester, a crosslinkable rubber, and a crosslinking agent. The vulcanizate has a continuous phase of polyester and a dispersed phase of crosslinked rubber. The polyester provides abrasion resistance and the crosslinked rubber slip resistance. The composition can be molded into articles like tires and belts without the need for curing. The crosslinked rubber particles disperse in the polyester matrix. This allows recycling the thermoplastic vulcanizate by grinding and reusing in new articles.

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A vulcanizing agent for rubber that allows reversible crosslinking and recycling. The agent has a structure with α-olefin double bonds that can undergo reversible Diels-Alder cycloaddition reactions at high and low temperatures. At high temperatures, the cycloaddition breaks the crosslinks. At lower temperatures, the crosslinks reform. This allows the rubber to be repeatedly vulcanized and de-vulcanized without chain scission. The reversible crosslinking enables recycling of crosslinked polymers like vulcanized rubber.

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Recycled carbon black with improved properties for reinforcing rubber products. The recycled carbon black has a modified surface condition with specific characteristics that enhance bonding with rubber components. The modifications involve oxidative decomposition of rubber residuals on the carbon black surface followed by filling pores with carbide. This removes rubber carbide adhering to the carbon black and exposes the surface for better rubber bonding. The modified carbon black has a nitrogen surface area of 50-250 m2/g, a Raman peak intensity ratio of 1580/1350 cm-1 of 84-111, and fewer defects compared to unmodified recycled carbon black.

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Method for recycling vulcanized rubber to increase performance and allow higher recycled rubber content compared to prior methods. The key is using a barrier material to prevent sulfur and cure accelerators from the fresh rubber diffusing into the recycled rubber during co-vulcanization. This prevents additional crosslinking in the recycled rubber and improves bonding between the two types of rubber. The barrier material forms a diffusion barrier around the ground recycled rubber particles in the fresh rubber matrix during vulcanization.

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Waste tire processing system that extracts steel cords from tires in a more efficient and recyclable way compared to whole tire crushing. The system involves a series of machines to separate the rubber and steel components. The process involves washing tires, drying them, heating and flattening them, cutting them, pulling the steel wires, and grinding the rubber. This allows separating and recycling the steel cords separately from the rubber.

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A simplified and efficient method for converting waste tires into rubber powder using a single machine. The method involves cutting, grinding, and separating the tire components in one process. A specialized tire pulverizer replaces the multiple machines and steps typically required. The pulverizer has tools that can simultaneously cut the tire top, sidewall, and inner surface at high speeds. The cut rubber is collected by vacuum instead of open grinding. This compact, integrated process reduces equipment, energy, and environmental issues compared to traditional tire powder production.

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Method for pollution-free recycling of used tires without generating pollution or odor. The process involves shredding tires, spraying them with water, freezing the shreds, crushing the frozen pieces, separating metal fibers, re-crushing, and screening. The freezing step is done at very low temperatures to prevent decomposition and odor generation. It allows clean recycling of tires without using high temperatures and chemicals that cause pollution.

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A continuous thermal cracking system and method for whole tires of waste tires that allows recycling of whole tires without the need for crushing them into blocks first. The system uses a preheating tank, thermal cracking reactor, and condensing system connected in a ring. The preheating tank has front and rear sections filled with water and oil respectively to heat the tires. The reactor has a sealing screw, front bin, internal kettle, and hot air heater. The condensing system separates heavy and light oil. The sealed preheating and reactor sections prevent volatile oil escape. The hot air heater preheats the kettle. This allows fully cracking the whole tires without crushing.

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Recycling method for waste rubber using a specialized machine that reduces pollution compared to traditional chemical regeneration methods. The machine has a mixing chamber with rotors that grind the rubber block. It also has a demagnetization chamber to remove magnetic impurities from the ground rubber. The machine uses motors and augers to move the rubber through the stages.

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Method for devulcanizing vulcanized rubber to recycle old tires and improve properties of rubber articles. The method involves using a twin-screw extruder with a regenerative agent feed point in the upper half of the barrel. The extruder devulcanizes the rubber at temperatures around 100-150°C. This breaks the sulfur bonds without shortening the polymer chains. The devulcanized rubber can be further processed into new rubber mixtures with better properties compared to using fully devulcanized rubber. The extruder configuration with regenerative agent feed allows efficient devulcanization without chain scission.

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Chemically recycling vulcanized elastomers like rubber without high temperatures or solvents. The process involves using ozone and decrosslinking agents like peroxides or persulfates in solvent to dissolve and decrosslink the rubber waste. The solvent swells the polymer chains and the decrosslinking agents break the bonds. Ozone then attacks the decrosslinked chains. This allows recycling vulcanized rubber without degradation or special equipment. The recycled elastomer can replace virgin rubber in new products.

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A method for recycling waste tires into ultra-fine rubber powder that fully utilizes the renewable resources in waste tires. The method involves cutting the tires into rings, strips, and blocks, soaking the blocks in water to soften them, crushing them to a fine powder, cleaning, separating fibers, desulfurizing, and cooling the powder. This optimized process allows making high-quality ultra-fine rubber powder from waste tires.

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A waste tire pulverization and rubber powder recovery system that efficiently and cleanly recycles waste tires into usable rubber powder. The system involves a series of crushing, washing, freezing, and grinding stages to progressively reduce the tire into powder. This allows recovery of the rubber without generating pollutants like dioxins. The stages include: 1. Primary normal temperature crushing to break the tires into fragments 2. Fragment washing to clean the pieces 3. Secondary normal temperature crushing to further break the fragments into smaller pieces 4. Primary freezing and grinding to freeze and grind the smaller pieces into powder 5. Secondary freezing and grinding to further grind the powder into finer powder The freezing stages enable cleaner grinding and powder separation. The system also uses liquid nitrogen in the primary grinding stage to further improve powder quality.

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Mobile tire recycling system that can be transported to sites for processing tires. The system involves a modular setup with separate modules for removing bead wires, cutting rubber sides, and further processing. The bead wire removal uses induction heating to separate the wires from the rubber. The tire is heated to break the bond, cooled, and then the wires are mechanically or magnetically separated. This allows recycling the metal wires separately from the rubber. The cut rubber sides are further processed into recyclable granules. The modular setup allows transporting the components to a site and assembling the recycling system there.

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An environmentally friendly system for recycling waste tires into rubber. The system involves multi-stage grinding and separation to efficiently extract pure rubber from the tires. It has coarse pulverization, magnetic separation, and fine pulverization stages. The coarse pulverizing structure breaks the tires into larger pieces. The magnetic separation separates the pieces into pure rubber and iron-bearing rubber. The pure rubber goes to fine pulverization, while the iron-bearing rubber is magnetically separated again to improve purity. This allows fast, efficient, and high-quality recycling of tires into pure rubber.

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Method for recycling waste tires into reusable rubber materials. The method involves grinding the waste tires into granular rubber, then sieving and conveying the granules to further grind them into powder. The powder is then processed with additives like carbon black, cross-linking agent, wax, and antioxidant to make a usable rubber compound. The compound is formed by kneading, cooling, and vulcanization.

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Automatic processing system for recycling waste tires that can fully automate dismantling and separating the tire components for recycling. The system uses a series of connected machines like storage, bead wire separators, crown cutters, shredders, wire grinders, and wire sorting machines to automatically process and separate the tire into its components for recycling. This improves efficiency and consistency compared to manual dismantling.

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Environmentally friendly recycled rubber production system and method that improves efficiency and purity of recycling waste tires into rubber. The system involves a multi-stage process with separate grinding and magnetic separation steps. Coarse pulverization of tires is followed by magnetic separation to divide into pure rubber particles and iron-bearing rubber particles. Pure rubber particles are further finely ground, while iron-bearing rubber particles are magnetically separated again to ensure purity. This staged processing improves recycling speed and purity compared to direct grinding of whole tires.

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Efficient and quick tire recycling system that crushes tires into fine powder. The system has a multi-stage crushing process with a transverse feeder, mills, oscillating screens, conveyors, and control system. It also has a stirring system to mix a surfactant with the crushed tire particles before grinding to reduce calorific value and prevent fires during grinding.

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Environmentally friendly tire recycling machine that can extract metal from waste tires before crushing the rubber. The machine has a rotating table, metal detector, cutting assembly, clamping assembly, crushing assembly, and conveyor belt. If metal is detected, the table stops and cuts off the metal part. The clamping assembly removes the uncut tire section. This allows separating metal objects from tires before crushing, preventing metal contamination in recycled rubber.

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A waste tire cracking system for efficiently and cleanly recycling end-of-life tires into useful products like carbon black and steel. The system uses a two-stage cracking furnace setup with preheating, separation, and condensation steps to maximize resource recovery. The first furnace cracks the tires to release the carbon black and steel. The second furnace further cracks the carbon black to increase yield. The condensers collect the water vapor and liquid condensates from the gases. The system also uses a spiral feeder to introduce the tires into the furnaces. This allows adjusting the feeding height based on tire composition. The system also has filters and exhaust ports to control emissions.

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Recycling process for waste tires that involves shredding the tires, extracting the steel using magnetic separation, and then separating the rubber using centrifugation. This allows recovering the steel, eliminating the need for high temperature pyrolysis, reducing environmental impact, and reducing cost compared to traditional methods. The shredded tires are first magnetically separated to remove the steel. The remaining rubber is then centrifuged to separate the lighter rubber particles from the denser filler particles. The separated rubber can be used for recycled tire applications, while the filler is disposed of.

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Rubber tire recycling device that efficiently separates and recover valuable components like steel, rubber, and sand from waste tires. The device has stages to remove the tire crown, rims, and steel wire mesh in a controlled manner. It uses mechanisms like cutters, push rods, and gears to separate the tire components. This allows recovery of steel wire and mesh with integrity, avoiding residual adhesion issues. The sand is removed separately to prevent wrapping around the cutter. The separated components are then collected.

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A continuous, safe, and efficient method for treating and recycling waste tires using a closed steel belt furnace. The method involves non-catalytic thermal cracking of waste tire pieces in a continuous closed steel belt heating furnace under positive pressure. This allows continuous pyrolysis of tires at safe conditions, replacing intermittent small-batch production. The positive pressure prevents explosions and allows higher throughput and efficiency compared to open pyrolysis.

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Rubber recycling system for waste tires that converts old tires into sound insulation mats for construction. The system involves a series of devices to shred, crush, mix, flatten, and dry the tire rubber. It removes steel wire, shreds the rubber, crushes further, mixes with other rubber, flattens into sheets, and dries to make the insulation mats. The continuous process improves efficiency and quality compared to separate steps.

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Environmentally friendly method for treating waste tires to reduce, harmless, and reuse them instead of incineration or landfilling. The method involves sorting tires into four categories based on condition: intact, mostly intact, damaged, and no retread value. For intact tires, they are pretreated by retreading techniques. Then, the tires are further processed using techniques like vacuum pyrolysis, molten salt pyrolysis, or top-turning to extract valuable materials like oil, carbon black, steel, and fiber. The extracted materials can be used for various purposes like road construction, carbon capture, or as feedstocks for other products. The goal is to maximize recycling and reuse of waste tires in an environmentally friendly way.

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Recovering and transforming ground tire rubber (GTR) into a form suitable for use as a raw material in the manufacture of articles of manufacture that would conventionally be made from virgin rubber. The process involves using an electromechanical reactor to induce delamination of the rubber matrix within vulcanized rubber particles coordinated with disruption of sulfuric bonds. This allows realignment of the crosslinks and formation of intermixed, realigned, sulfur-bridged sheets within the matrix. The modified rubber has mechanical properties equivalent to virgin rubber.

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Recycling worn tires and rubber products to obtain carbon-containing materials with improved properties for use in tire manufacturing. The recycling method involves mechanically crushing the tires, pyrolyzing them to form gases and solid residue, removing impurities, grinding the residue, classifying it into small and large fragments, further grinding the large fragments, and packaging the small fragments for use as filler in tires. The key steps are crushing tires before pyrolysis to remove metal beadlings, using a caulking inhibitor during pyrolysis, and finely grinding the residue to make carbon with low impurities and high surface activity suitable for tire rubber.

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A process for producing rubber granules from end-of-life tires suitable for devulcanization. The process involves grinding the tires to produce the granules, followed by a curing step to mature the granules. The curing involves storing the granules in containers at a constant temperature with forced aeration for 45 days to fully cure the granules and prepare them for devulcanization. This step is necessary because the grinding process breaks bonds and charges the granules, making them unsuitable for devulcanization without curing. The curing also separates the granules by chemical composition since tires are made of different rubber types in different sections. This allows managing the reactor parameters based on the granule composition during devulcanization.

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Recycling vulcanized rubber scraps from tire manufacturing and recycling to create a high-quality rubber product that preserves the properties of the original tire rubber. The process involves agglomerating the rubber powder using a binder with a coacervating polymer. The rubber powder is above 24 mesh size and can be obtained cryogenically or mechanically. The binder is an asphalt additive with styrene-butadiene rubber (SBR). The agglomeration is done by mixing the rubber powder and binder in a cold mixer. The final yield is 1.5 kg binder to 3 kg rubber powder. The coacervation fixes and compacts the rubber powder into a dense, laminated product that maintains the original rubber properties.

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A process for producing rubber powder from waste tires that improves efficiency and separates the rubber powder by purity. The process involves cutting the tire into strip rings with the centerline as the center, then cutting along the centerline to separate the rubber from the steel. Strips are further cut to minimize rubber bonded to steel. This allows separate crushing of pure rubber and steel-rubber adhesive. The separated rubber powder can then be classified based on purity.

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Processing waste tires into high-quality recycled rubber particles for reuse in various applications. The process involves decomposing the tires, making rubber from the decomposed material, plasticizing it, and pelletizing into small particles for easy handling and reuse. This allows recycling waste tires instead of just disposing of them, reducing resource waste and pollution.

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Rubber tire recycling machine that can efficiently recycle scrap tires into usable materials. The machine has a vertical working chamber where two rotating rollers clamp and feed tires into the chamber. Separating rollers sort out the rubber from the steel. The rubber falls into an abrasive chamber where it's ground into particles. A magnetic conveyor separates the steel. The rubber particles exit the machine.

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Automated system for processing, managing, and extracting recycled rubber compounds for reuse in tire manufacturing. The system involves using specialized containers and pallets to store and identify the recycled rubber compounds based on their properties. This allows automated handling of the containers using a clamping device and robotic arm to extract the recycled rubber for reuse in tire production. The containers are stacked on pallets in a way that enables automated demolding and removal of the recycled rubber without mixing it with other types. The system also includes a weighing station, empty container station, and automated storage for efficient recycled rubber handling.

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A method to prepare reclaimed rubber from waste tires without using high-energy equipment like microwaves or radiation. The method involves manually shredding and grinding the waste tires into small pieces, followed by heating them in a mixer at 150-200°C for 30-60 minutes to break down the tire rubber. Antioxidants and oils are added during the heating process to improve the quality of the reclaimed rubber. The shredded and reground tires can also be added as an additive to virgin rubber during compounding. This manual processing method allows for scalable and cost-effective production of reclaimed rubber from waste tires without requiring specialized equipment.

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A system and method for producing rubber powder from waste tires at room temperature to improve quality, reduce energy consumption, noise, and dust compared to conventional methods. The system involves a sequence of equipment: ring cutter, shredder, butterfly separator, multiple rubber breakers, magnetic separator, fiber separator, rubber powder silo, rubber powder grading device, centrifugal screen, and mill. The shredder uses water spray and hydraulic pressure to shear the tire pieces into smaller pieces. The breakers further shred the pieces into powder without excessive heat generation. The system removes fibers and impurities using separators. The powder is graded, screened, and milled to desired sizes.

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Waste tire thermal decomposition system for recovering value from junked tires. It has a feeding mechanism to input tire fragments, a reactor for thermally decomposing the tires, a carbon black removing device, and a carbon black collecting device. The feeding mechanism uses hoppers, conveyors, and elevators to transport the tire fragments to the reactor. The carbon black removing device has a filtering device to separate the carbon black from the gases generated during decomposition. This allows capturing the carbon black as a valuable product. The system also features optimized feeding, filtering, and gas handling components like spiral baffles, scrapers, and venting to improve efficiency.

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Waste tire recycling system for making rubber powder that reduces environmental pollution and resource waste from tire disposal. The system involves a multi-stage process to extract and process the rubber from waste tires. It includes steps like automated tire disassembly, cleaning, crushing, magnetic separation, fiber separation, milling, and dust collection. The tires are disassembled, cleaned, crushed, magnetically separated, fibers removed, milled, and then the rubber powder is collected. The system uses specialized machines like crushing, magnetic separators, milling, and dust collection equipment to extract the rubber from the tires. This allows recovering the valuable rubber instead of disposing of whole tires, reducing waste, pollution, and resource dependence.

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A waste tire recycling production line to efficiently and safely process waste tires into usable materials. The production line involves cutting the tires into blocks, grinding and sorting the blocks, and then pyrolyzing the ground rubber. The line includes machines like a tire cutter, storage bin, grinder, screens, separators, conveyors, and a pyrolysis system. This allows automated and automated separation and processing of the tire components to extract reusable rubber powder. The pyrolysis system converts the rubber into usable products like carbon black, oil, and gas.

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A customizable waste tire recycling system that enables large-scale recycling of waste tires with reduced pollution and automated processing. The system allows users to configure a waste tire recycling production line tailored to their specific needs by selecting and configuring the equipment components. The system includes a web interface for users to set equipment parameters and track production line status. The configurable equipment lineup includes crushers, separators, screens, magnets, dust collectors, etc. to process tires into separate steel, rubber, and dust.

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Recycling rubber, like tires, using a continuous process that breaks down the rubber into smaller components like natural gas, oil, carbon black, etc. The process involves injecting rubber into a dissociating system with supercritical water. The rubber is mechanically broken down, then atomized into the supercritical water where it oxidizes and breaks apart further. The resulting mixture is separated into components. This allows recycling rubber into useful products instead of just ground-up tire mulch or burning tires for power.

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A waste tire thermal splitting system that extracts useful products like rubber powder, oil, and gas from waste tires through pyrolysis. The system has stages like preheating, spiral squeezing, thermal cracking, refining, cyclone separation, condensing collection, and compression. It aims to efficiently process waste tires into reusable materials instead of burning or landfilling them, while avoiding pollution by capturing and purifying the gases. The system converts tires into products like rubber powder, oil, and gas through pyrolysis. It preheats the tires, squeezes them to extract oil, cracks them thermally to split into products, refines the rubber, separates solids and gases, condenses the gases, and compresses the rubber. This captures all the products and prevents pollution compared to direct burning or landfilling.

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Method for recycling automobile rubber parts like tires, seals, and components, that enhances the recycled rubber properties to improve reuse and reduce environmental impact compared to incineration or landfill. The recycling process involves cleaning the rubber parts, crushing them into small pieces, and then adding a specially formulated reinforcing material to the ground rubber during compounding. The reinforcing material is a composite powder made of aluminum oxide and mica, which is processed into a modified aluminum nitride composite powder. This composite filler is dispersed into the recycled rubber during compounding, providing enhanced mechanical properties and bonding to the rubber matrix. The modified aluminum nitride composite filler contains nano-titanium dioxide and silicon oxide, which improves interface bonding between the filler and rubber.

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Environmentally friendly regeneration treatment method for waste tire rubber that reduces pollution and allows recycling of waste tires. The method involves a process of grinding the waste tires into meshes, then subjecting them to extrusion at low temperature and high pressure to regenerate the rubber. The regenerated rubber can be blended with other materials like sulfur, zinc oxide, coumarone, and esters to make new rubber compounds. The regeneration and blending process improves the quality of the recycled rubber compared to prior art methods.

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A method for using waste tires to produce fine rubber powder that addresses the issues of low production efficiency, incomplete impurity separation, easy agglomeration, and more metal impurities in the finished product. The method involves adding calcium carbonate powder and circuit board powder as abrasives during the grinding process. This improves the dispersibility and fluidity of the rubber powder, preventing agglomeration, and allows complete impurity separation without adding excessive metal impurities.

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A method to recycle tires and other waste materials into new products like building components. The recycling process involves placing tires and/or tire pieces inside a casing, reinforcing them with metal pins/rods, and binding them with adhesive. This creates a composite material with tire rubber sandwiched between a reinforced exterior. The composite can be used as building components like flooring, panels, or wall coverings. The recycled tire composite provides durability, shock absorption, and sound insulation properties for building applications.

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System for making reclaimed rubber using waste tires that efficiently extracts and processes the rubber components. The system involves a series of machines connected in sequence: tire ring cutter, tire crusher, rubber block shredder, magnetic separator, fiber separator, mill, air separator, and desulfurization refiner. This allows separating and purifying the rubber from the steel and other contaminants in the tires, resulting in high-quality reclaimed rubber.

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Enhancing the reuse of waste tire rubber by optimizing processing to improve the quality of recycled rubber products. The method involves crushing and screening the waste tires, then mixing the rubber powder with various additives and fillers to improve compatibility and performance when used in new products. This enhanced reusability compared to raw tire rubber enables recycling more waste tires and reducing landfilling.

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Oil refining production line for recycling waste tires that improves efficiency, reduces pollution, and improves safety compared to existing methods. The line has steps for cutting, grinding, sorting, and pyrolyzing tire rubber to extract oil. The cutting system uses a rotating frame with rubber wheels that grip and feed a tire into a discharge slot. The grinding system has crushers with staggered teeth and conveyors to separate out metal. The pyrolysis system uses a furnace, condensers, purifiers, and separators to process the rubber powder into oil, carbon black, and gas.

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Recycling waste tires into a new product with improved recyclability and environmental benefits. The method involves shredding the tires, mixing the shreds with other materials, heating and agitating the mixture to form a composite, condensing it, and then molding the composite into the new product. The composite contains tire shreds, nitrile rubber, straw ash, calcium stearate, sodium alkyl sulfonate, zinc phosphate, calcium oxide, polyethylene wax, zirconium fluoride, polyxylene siloxane, and auxiliary agents. This composite has better recyclability compared to traditional reclaimed rubber, as it uses a simpler process, higher recycling rate, and lower harmless cost.

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