116results about How to "Improve recycling rates" patented technology

The invention discloses a waste and old plastic product recovering apparatus, and belongs to the technical field of waste and old plastic products. The apparatus comprises a cleaning chamber. The topof a grinding chamber is provided with a motor (A). The output shaft of the motor (A) is provided with a blade shaft. Blades are arranged on the outer wall of the blade shaft. A first screen is arranged right under the blade shaft. A motor (B) is arranged on the right side of the grinding chamber. The outer wall of a grinding shaft is provided with grinding blades. A second screen is arranged right under the grinding shaft. Two different sets of blades are arranged in the grinding chamber so as to process waste and old plastic products with different shapes and degrees. A draught fan and a heating device are provided. When waste and old plastic products are grinded, the draught fan and the heating device can carry out a high temperature treatment on the waste and old plastic products. Thesubsequent treatment on grinded waste and old plastic products becomes more convenient. The sieve pores of the first screen are larger than sieve pores of the second screen. The grinded plastic products can be grinded for another time. The grinding efficiency is improved and the plastic products are more radically grinded.

The invention relates to a synthetic method of iodized vegetable fatty acids and their esters. In the invention, at first, vegetable fatty acids are prepared from vegetable oils by the saponificationand acidification, the fatty acids are in the iodination reaction with phosphorus trichloride, phosphorous oxychloride or phosphorus pentachloride and alkali metal iodides such as sodium iodide and the like in an organic medium in the presence of water to generate a hydroiodic acid on site. The iodized vegetable fatty acids are reacted with the alcohol in the catalysis of the acid to produce iodized vegetable fatty acid esters.

The invention discloses a recycling process of a sintering neodymium iron boron discard black wafer. The recycling process comprises the following steps of pretreatment of waste material, multi-stage crushing, hydrogen decrepition, powder preparation by jet milling, blending of main alloy and auxiliary alloy, forming of a magnetic field, and sintering, so as to prepare a neodymium iron boron magnet which has satisfactory requirement; the auxiliary alloy is an alloy fine powder containing one or multiple of praseodymium neodymium, holmium iron, gadolinium iron and dysprosium iron, and the percentage of auxiliary alloy is 1% to 50%. The recycling process has the advantages that the utilizing rate of waste material of the black wafer is high, the flow process is simple and controllable, the operability is strong, and the manufacturing cost is saved; strong acid and strong alkaline with higher pollution property are not contained, the environment-friendly effect is realized, and the economic and social benefits are higher.

The invention relates to a resource utilization method for metal surface treatment sludge, in particular to resource utilization of stainless steel acid pickling sludge or electroplating sludge, and belongs to sludge pollutant treatment in the steel and metallurgy industry. Hydrochloric acid or nitric acid is adopted as pickle liquor, metal elements in the sludge are acidized and leached, calcium salt sludge hard to dissolve is separated through filter pressing under the condition that the pH is controlled to range from 1.8 to 3.0, the sediment is washed 1-3 times with a diluted hydrochloric acid solution with the pH equal to 3.0+/-0.2, a slightly soluble calcium salt sludge product free of heavy metal pollution is obtained, and the sludge can be used as cement filler or a brickmaking or building material. Furthermore, metal ions in acid leaching filtrate are neutralized with lime emulsion, and a metal hydroxide sludge product is obtained and can be used as a stainless steel smelting material or used for separating single metal elements. Filtrate obtained after metal hydroxide is subjected to filter pressing, and after recycling is carried out 3-5 times, when the concentration of calcium chloride is larger than 20%, evaporation and crystallization are carried out to recycle a calcium chloride product.

The invention provides a method for recycling zinc oxide waste desulfurizers and co-producing ammonium sulfate, which comprises the following steps: roasting zinc oxide waste desulfurizers at 850-900 DEG C so as to obtain an inactive zinc oxide material; dissolving the inactive zinc oxide material in water so as to obtain fluid, adding a sulfuric acid into the fluid, and after the mixture is completely reacted, filtering the obtained product, so that filter residue and zinc sulfate filtrate are obtained; adding solid ammonium bicarbonate into the zinc sulfate filtrate, reacting at 30-40 DEG C, and in the process of reacting, controlling the pH value of the solution to be 6.8-6.9 until the reaction is completed; keeping the pH value of the solution after the reaction is completely unchanged, raising the temperature of the solution to 60-70 DEG C, and continuing to age the solution under the condition of heat preservation, so that an basic zinc carbonate filter cake and an ammonium sulfate solution are obtained; washing, drying and roasting the basic zinc carbonate filter cake so as to obtain active zinc oxide; and evaporating the ammonium sulfate solution so as to recycle ammonium sulfate. The method for recycling zinc oxide waste desulfurizers and co-producing ammonium sulfate, which is disclosed by the invention, has the advantages of low treatment cost, low environmental pollution, and high zinc recycle rate.

The invention discloses a recycled polypropylene modified polrvinyl chloride sectional material and a preparation method thereof. The sectional material is mainly prepared by blending 100 parts of polrvinyl chloride, 8 to 20 parts of crosslinking recycled polypropylene, 3 to 6 parts of stabilizer, 3 to 6 parts of titanium white powder, 3 to 10 parts of chlorinated polyethylene, 1 to 4 parts of acrylic impact modifier, 0.2 to 1.0 part of lubricant and 0 to 30 parts of active calcium carbonate. The sectional material has excellent performance, can effectively improve recycling utilization rate,saves resources and cost and is environmentally-friendly and safe.

The invention relates to a zinc hydrometallurgy novel efficient purification process and belongs to the technical field of zinc hydrometallurgy zinc liquid purification production. The zinc hydrometallurgy novel efficient purification process comprises the steps that a main system adopts a zinc powder replacement method (three stages of purification) for removing copper, cadmium, cobalt and other impurity ions in zinc liquid, and an auxiliary system adopts a zinc powder+chemical agent method (four stages of purification) for conducting purification, separation and refinement on the copper, cadmium and cobalt slag. The zinc hydrometallurgy novel efficient purification process has the advantages that (1) the main system adopts the zinc powder replacement process, the purification decontamination ability is high, no impurity is brought into the main system, and plate burning and other risks are avoided; (2) the auxiliary system adopts the zinc powder+chemical agent method for conducting separation and purification on the copper and cadmium slag lixivium, cobalt removing efficiency is high, reaction time is short, comprehensive energy consumption is low, and the separation effect is good; and (3) a barren cadmium solution produced by the auxiliary system can return to the leaching procedure of the main system, the recovery rate of zinc is increased, cadmium ingots, copper slag and cobalt slag which are produced can be sold, cost is lowered, and benefits are increased.

The invention discloses pitch mixed material warm-mixing and regenerating equipment. The equipment comprises a pitch mixed material plant-mixing primary system, a pitch mixed material plant-mixing regenerating system, an additive processing system and a tail gas processing system, wherein a pitch sprinkling system in the pitch mixed material plant-mixing primary system is a warm-mixing foam pitch sprinkling system which comprises a foamed pitch foaming device, a foamed pitch water metering device, a pitch metering device and a remote control system. The technical problems of cementation, pitch ageing and the like in traditional pitch mixed material thermal regeneration equipment are effectively solved. The heating temperature required for mixing new aggregate materials and regenerated materials is reduced, and convenience is brought for construction; the pollution of regenerated materials to environment is reduced, so that the working efficiency of the equipment is improved. The equipment has the advantages of simple and practical structure, simplicity in operation and control and stability in work. The equipment is suitable for the production of various pitch mixed materials and regenerated materials, and can be joined and matched with pitch stirring equipment and regenerating equipment for use.

The invention relates to a cementing material containing waste incineration fly ash, steel slag and mineral slag, and a preparation method and an application thereof. The cementing material containingwaste incineration fly ash, steel slag and mineral slag mainly comprises, by weight, 0-60 parts of S95 slag, 0-60 parts of high-aluminum steel slag, 20-40 parts of the waste incineration fly ash and7-13 parts of desulfurized gypsum. A ratio of the cementing material to aggregate in the concrete or a filing material is 1:4 to 1:8, and the concentration is 77%. A large amount of the waste incineration fly ash is added, and the cementing material has good industrially-applied compressive strength without adding additives such as an excitant and an early strength agent, so the cementing materialcan be used as a cementing material of concrete, can also be used as a mining filling material, and is a good substitute of cement.

The invention discloses a method for recycling sintered neodymium-iron-boron waste. The method includes the following steps of 1, waste classifying; 2, surface zinc removing; 3, surface oil removing;4, waste breaking; 5, hydrogen breaking; 6, airflow mill powder grinding; 7, briquetting sintering; and 8, aging treatment. According to the method for recycling the sintered neodymium-iron-boron waste, the use ratio of the waste can be effectively increased, consumption of the waste is accelerated, the inventory cost is reduced, the product quality is guaranteed, neodymium-iron-boron magnets withdifferent properties can be prepared effectively by adjusting the ratios and varieties of rare earth metal blocks, the application range of the waste is widened, a sealing plate can be effectively pushed through granular materials injected into a mixing device to rotate to inject an antioxidant and a lubricant quantitatively, thus, the processed particles are fully wrapped by the antioxidant andthe lubricant effectively, the granular materials are prevented from being oxidized during following machining, and the influences on the performance after the waste is recycled are reduced.

The invention relates to a sulfuric acid tail gas recovery device, belonging to the treatment field of waste gas in industrial production and in particular relates to waste gas treatment in sulfuric acid production. The invention provides a sulfuric acid tail gas recovery device which can use absorbing agents circularly and can be used for low-concentration SO2 concentration retreatment, aiming at solving the problems that in the existing treatment equipment, after waste gas is liquefied, absorbing agents in a sulfuric acid absorption apparatus device cannot be reutilized, and low-concentration SO2 generated during liquification cannot be utilized. The device comprises an absorption tower communicated with a sulfuric acid tail gas inlet, wherein a liquid-enriched pipeline is arranged at the lower end of the absorption tower and is communicated with the upper end of a regeneration tower by a liquid-enriched pump, the regeneration tower is connected with a reboiler, and the regeneration tower is sequentially communicated with a condenser and a gas-liquid separator. The sulfuric acid tail gas recovery device can circularly utilize the absorbing agents in the absorption tower, the low-concentration SO2 can be subjected to concentration retreatment, and the treatment efficiency is improved.

The invention provides a recycling method for waste refractory materials. The method is characterized by comprising the following steps: (1) selecting materials; (2) carrying out coarse crushing; (3)carrying out fine crushing; (4) carrying out deironing; (5) carrying out proportioning; and (6) carrying out high-pressure forming. According to the refractory material recycling method provided by the invention, waste refractory materials can be reused to prepare recycled refractory bricks, so that landfill of the waste refractory materials is avoided, and land occupation is avoided; moreover, the recycling rate of the refractory materials is higher through the adoption of the method; through the thermosetting resin added in the ingredients, the material mixing is more uniform, and density ofthe recycled refractory bricks is increased, so that performance of the refractory bricks is correspondingly improved; through the added graphite, thermal conductivity and thermal shock resistance ofthe prepared recycled refractory bricks are remarkably improved; and the added T60 carbon-containing resin and phenolic resin are used as binding agents, so that harmful smoke is not generated in a use process, and an environment protection characteristic is achieved.

The invention relates to a device and a method for nondestructively recycling chips. The device comprises a metal working table top used for bearing an intelligent card, a heating unit and a temperature control unit, wherein the heating unit is arranged below the metal working table top; the heating unit is combined with the metal working table top to heat the intelligent card; or the heating unit heats the metal working table top and is embedded in the middle of the metal working table top; and the temperature control unit is used for controlling the heating temperature of the heating unit and is connected with the heating unit. The intelligent card to be recycled is flatly laid on the working table top, the temperature control unit controls temperature value of the heating unit, the heating unit heats the metal working table top to increase the temperature of the metal working table top and soften the substrate of the intelligent card, the chip is nondestructively separated from the softened substrate of the intelligent card, and the chip taken out is encapsulated again and is put into use after electrical property tests. The device and the method can be widely applied in various fields, have high recycling rate of the chip, and can save a large amount of precious resources and capital.

The invention relates to a purified water production process with high recovery rate. The process comprises three steps, namely raw water pretreatment, reverse osmosis filtration and concentrated water reclamation and is characterized by the addition of the concentrated water reclamation, wherein the concentrated water reclamation comprises the following steps of: successively processing water in a concentrated water tank by a concentrated water sand filer, a concentrated water carbon filter, a concentrated water softening apparatus and a concentrated water fine filter and then carrying out reverse osmosis treatment; and returning fresh water subjected to concentrated water reverse osmosis treatment to a raw water tank, and finally discharging sewage. In the process, the concentrated water which is ready to be discharged is recycled again for secondary purification, thereby improving the repeated utilization of the purified water,avoiding the waste of water resource, and enhancing the reusing rate of water reaches to above 85%.

The invention relates to an integrated bunch type radiant boiler and preheating boiler mixed heat recovery device, which comprises a pressure shell, a synthesis gas inlet, a radiation heat exchange component, a desuperheater component, a slag basin, a heat convection component, and a synthesis gas outlet, wherein the synthesis gas inlet is formed in the top of the pressure shell; the synthesis gas outlet is formed in the upper end of the side wall of the pressure shell; the radiation heat exchange component is longitudinally fixed in the middle of the pressure shell; the heat convection component is arranged between the radiant heat exchange component and the pressure shell; the desuperheater component is fixedly arranged below the heat convection component; and the slag basin is positioned at the lower part inside the pressure shell. The heat recovery device can effectively absorb sensible head in the coarse synthesis gas to generate high-pressure steam or intermediate-pressure steam for power generation or preheating other working media, so as to greatly improve the whole source utilization ratio, and achieve high energy recovery utilization ratio. The whole size of the exhaust boiler can be effectively reduced; manufacturing, transportation and installation are convenient; and the dust deposition problem at the heat convection surface can be eliminated.

The invention relates to an advanced treatment and quality-divided recycling method of comprehensive smelting sewage and belongs to the field of industrial sewage treatment. According to the method disclosed by the invention, the normal operation of a subsequent advanced treatment system is ensured by adopting a radial flow sedimentation tank+air floatation reaction tank+air floatation tank process and a fiber ball filtering process for previous treatment and adopting an ecological regulating tank+aeration oxidization+high-density sedimentation tank+V-shaped filter tank process for pretreatment, an ultrafiltration+first-stage reverse osmosis+second-stage reverse osmosis process is used as an advanced treatment system, the chemical agent addition is reasonably and efficiently controlled, the key operation parameters are regulated and controlled, the accessory system is optimized, the smelting sewage is treated to the standard of circulating water, first-stage demineralized water and second-stage demineralized water, the smelting sewage is recycled and the system runs stably and reliably.

The invention discloses a circuit board recycling treatment device. The circuit board recycling treatment device comprises a machine body, the top of the machine body is provided with a material inletin a running through manner, the top of the material inlet is connected with moving plates through springs, the two sides of the material inlet are provided with first air cylinders, and the output ends of the first air cylinders run through the two sides of the material inlet and are connected with impact plates, the upper portion of one side of the machine body is provided with a first motor, the lower portion of one side of the machine body is provided with a second motor, and the circuit board recycling treatment device is further provided with a flow guide plate, the second motor and magnet rods. According to the circuit board recycling treatment device, circuit boards fall to the flow guide plate from a filter screen after being smashed, because the tilt angle of the flow guide plate is relatively gentle, the smashed circuit boards are made to fall slowly, the second motor rotates to make the magnet rods rotate, metal contained inside downward-falling broken blocks is adsorbed by the magnet rods, and the metal adsorbed on the magnet rods is collected manually, the recycling use ratio of the circuit boards is increased, generated dust is collected and treated by a dust remover, and pollution of the dust to the environment is prevented.

The invention discloses a processing method for printing and dyeing wastewater, which comprises the following steps: intercepting suspended solids in the printing and dyeing wastewater through a grid machine and a screen; The pond stays for 2 hours for sand settling treatment, and then the wastewater is introduced into the flocculation tank to add flocculant for flocculation treatment. Carry out microbial treatment of wastewater, and then introduce the microbially treated wastewater into the regulating tank, add sodium chlorate and sodium hydroxide to the wastewater, decolorize it and adjust the pH value to make the wastewater clear, and then add activated carbon for deep purification. The clean water is tested for water quality, and then recycled and reused after passing the inspection; the printing and dyeing wastewater treatment method has the characteristics of simple process, convenient operation, low operating cost, good treatment effect and high recycling rate.

The invention relates to a sintering flue gas heating denitration device and a sintering flue gas heating denitration method, which belong to the field of the treatment of industrial waste gas. The sintering flue gas heating denitration device comprises a denitration tower as well as a gas inlet flue and an exhaust flue which are connected with the denitration tower, the gas inlet flue is connected with an ammonia gas delivery pipe and a flue burner, a flue gas-flue gas reheater used for heat exchanging is connected between the gas inlet flue and the exhaust glue, the exhaust flue is connectedwith a desulphurization tower, and the top of the desulphurization tower is provided with a wet-type electric dust collector. The device effectively recycles the waste heat by adopting an energy two-level recycling method. The sintering flue gas heating denitration method comprises the following steps: heating the sintering flue gas to 300 to 320 DEG C, mixing the sintering flue gas and ammonia gas, and performing catalytic reaction to obtain denitrated pure flue gas; cooling the denitrated flue gas and the sintering flue gas before the heating in a heat exchanging manner to 150 to 160 DEG C,desulphurizing, and dedusting. By adopting the method, the waste heat is recycled by adopting the energy two-level recycling method, thereby saving the energy.

The invention discloses a reactor. The reactor comprises an outer barrel, a reaction basket, a first heat exchange structure and a second heat exchange structure, wherein the reaction basket is arranged in the outer barrel and comprises a first heat exchange region and a second heat exchange region; the first heat exchange structure is arranged in the first heat exchange region; and the second heat exchange structure is arranged in the second heat exchange region. The first heat exchange structure and the second heat exchange structure are arranged in the reaction basket of the reactor, after two-time heat exchange, superheated steam is obtained, requirements of industrial production are met, and recovery rate of energy is greatly increased.

An ultrasonic field intensified process for desorbing cyanide and valuable metals from resin includes such steps as washing the resin carrying cyanide and valuable metals until it become neutral, loading it in desorption tower with ultrasonic generator, using inorganic acid solution to desorb Zn, Ni and cyanide, ultrasonic field intensified blowing-down of the hydrogen cyanide, absorbing it by solution of sodium hydroxide to obtain sodium cyanide solution, returning it back to extracting system, using ammonia water to desorb Cu, using chelating agent to desorb noble metals, and reusing the resin after desorption.

The invention relates to an energy-saving oven provided with a multilayered lifting conveying device. The energy-saving oven comprises a rack, a housing arranged on the outer side of the rack, and a feeding device, a position correcting device, a material lifting conveying device, a material falling conveying device, a pushing device and an air conveying device assembled in the housing. The position correcting device corrects the position of a product on the feeding device, the feeding device feeds the product to the material lifting conveying device, the material lifting conveying device drives a plurality of products to ascend, the pushing device pushes the uppermost circuit board to the top layer of the material falling conveying device, and then the material falling conveying device descends the pushed products to the feeding device to send out. By arranging the multilayered lifting conveying device, the work efficiency and the occupied space area of the conveying device are improved greatly, and heat is utilized fully and effectively. The energy-saving oven is high in practicality and is of very high promotional meaning.

The invention provides a silicon block cutting device and a method for removing mortar impurities. The silicon block cutting device for removing the mortar impurities comprises a base, a cutting mechanism and a mortar spraying nozzle, wherein the base comprises a plurality of hollow metal pipelines which are in parallel, magnets capable of being inserted and pulled are arranged inside the metal pipelines, the cutting mechanism comprises a cutting body and cutting net lines, the cutting net lines are arranged on the base and used for cutting silicon blocks, the cutting net lines correspond to the metal pipelines, and the mortar spraying nozzle is fixed relative to the cutting body and sprays silicon cutting mortar to the cutting lines. The metal impurities of the motor on the cutting net lines are adsorbed on the metal pipelines driven by the magnetic force of the magnets, so that the performance of the mortar is improved, the using rate of the mortar is improved, and the silicon cutting cost is lowered; the line mark ratio after silicon block cutting is lowered, and the production yield and the quality of the silicon block cutting are improved.

The invention belongs to the technical field of medical sterilization equipment and particularly discloses a medical product disinfection and sterilization treatment system. The treatment system comprises a box body, a cleaning unit and a sterilization unit, wherein the box body is divided into an upper part and a lower part; a cleaning cavity is formed in the upper part of the box body; a sterilization cavity and a sewage treatment cavity are formed in the lower part of the box body; medical gloves are cleaned with cleanout fluid and disinfectors by virtue of the cleaning cavity of the box body, sewage after cleaning flows into the lower sewage treatment cavity, and the cleaned medical gloves drop into the lower sterilization cavity; a cover plate is arranged above the box body; the cleaning unit is positioned in the cleaning cavity of the box body; the cleaning unit is used for cleaning and disinfecting the medical gloves; the sterilization unit is positioned in the sterilization cavity below the box body; the sterilization unit is used for performing high-temperature steam sterilization on the medical gloves treated by the cleaning unit so as to realize complete disinfection ofthe medical gloves. According to the treatment system disclosed by the invention, the medical gloves can be subjected to cleaning and two-stage sterilization treatment, and the sterilization effect ofthe medical gloves is excellent.

The invention relates to the technical field of printing and dyeing equipment, in particular to a heat exchange circulating system for a dyeing machine. The heat exchange circulating system for the dyeing machine comprises the dyeing machine, a heat exchanger, a heat preservation water tank and a cooling pool; the heat exchanger is connected with a steam pipeline, the dyeing machine is connected with the heat exchanger through a guide pipe, a cooling pipe and a heating pipe is arranged in the dyeing machine, a water inlet of the cooling pipe is connected with a cold water pipe connected with the cooling pool, a water outlet of the cooling pipe is connected with a three-way pipe, and the three-way pipe is connected with the cooling pool and the heat preservation water tank; the cooling pool is connected with the heat exchanger through a cooling branch pipe and a cooling return pipe, the heat exchanger is connected with the heat preservation water tank through a connecting pipe, the heat preservation water tank is connected with the heating pipe through a hot water pipe, and an outlet of the heating pipe is connected with the three-way pipe. The heat exchange circulating system for the dyeing machine is high in heat energy recovery utilization rate and capable of reducing heat energy waste and lowering the production cost.

The invention discloses a paper and plastic separation technology of waste paper aluminum plastic composite packaging materials. The technology comprises two modules of slurry breaking selection and washing concentration, paper and plastic separation and washing can be conveniently carried out on composite packaging materials of tetra pak and the like, paper in the packaging materials is separated out of the paper and aluminum plastic composite materials in a paper slurry manner, no secondary pollution exists in the process, cleaning water can be subject to efficient segmental treatment and recycling through a sewage recycling system, the use amount of water is greatly reduced, and the aims of energy saving and emission reducing are achieved; the separated paper slurry enters the next slurry washing concentration module, and through coarse paper removing purification, cleaning, concentration wiping and other working procedures of paper slurry, paper is efficiently recycled. An aluminum plastic film remaining after paper slurry removal is conveyed to an aluminum plastic separation technology system, through the joint effect of continuous gravity floatation and micro bubble floatation, waste disintegrating slag is separated, and the recycling utilization rate of the plastic broken film is improved.

The invention discloses a process for recycling and collecting open residual ore, comprising the following steps: geological exploration, residual core classifying, flat zone recycling, trimmed zone recycling, corner zone recycling, and residual ore recycling. The process enables scientific and reasonable mine collection and provides efficient recycling and collection for open residual ores, recycling utilization of open residual ores is greatly increased, geological exploitation and different collection modes for various areas ensure both collecting speed and efficiency of residual ores, great economic benefit and survival space are provided for enterprises, and important practical significance is brought for mine resource crisis.

The invention discloses a physical method for separating an electrode current collector from an electrode material of a lithium ion battery. The method comprises the following steps of smashing a waste material of the lithium ion battery, and enabling the electrode current collector to be separated from the electrode material by a smashing effect, wherein the waste material of the lithium ion battery comprises, but not limited to, a waste lithium ion battery positive electrode, a waste lithium ion battery negative electrode, a mixture of the waste lithium ion battery positive electrode and the waste lithium ion battery negative electrode and a waste lithium ion battery. The method has the advantages of high separation efficiency, simple process, no pollution, low cost and the like, and the problems of pollution and resource of the waste lithium ion battery can be solved.

A method for generating a regenerated diaphragm through extracting PVDF from waste diaphragms is characterized in that the waste diaphragms are cleaned and dissolved as a raw material to form a diaphragm casting solution. The recycling rate is high and reaches 98%; the diaphragm can be repeatedly used, so the production cost is greatly reduced, and industrialization becomes possible; and the PVDF recovery effect is good, the PVDF pollution is greatly reduced, the production environment is good, and clean production and sustainable development are realized.

The invention relates to a repairing process of a radial tyre of a passenger car, and particularly relates to a repairing process before remanufacturing of a radial tyre of a passenger car, belonging to the technical field of tyre repairing. The flow process provided by the invention comprises the steps of cleaning marks, grinding, carrying out secondary cleaning, fitting rubber materials, vulcanizing formation and carrying out postprocessing. According to the repairing process, the recycling rate of the radial tyre of the high-speed-level passenger car is improved greatly; the safety performance of a remanufactured tyre in the using process is ensured effectively; the energy consumption from the recycling of the tyre to the repairing process is lowered, so that the call of national energy conservation and emission reduction is responded actively; the repairing surface is decorated and treated during the repairing process so as to achieve the beautiful visual effect and promote the recognition of the remanufactured tyre by people, so that the repairing process is identical to the recycling concept of developed countries, and the consciousness of energy conservation and emission reduction realized by all people is promoted.