1988 results about "Waste tires" patented technology

The invention belongs to the technical field of a building material used in road engineering, and specifically relates to drainage asphalt mixture for an ultra-thin wearing layer. The mixture comprises aggregated material, stuffing, high-performance asphalt and warm mixing additive; the maximal nominal size of the mixture is 6.7mm; the thickness of a pavement layer is 10-20mm; the aggregated material is basalt or dolerite; the used stuffing is mixture of limestone powder and common silicate cement, and the used high-performance asphalt is prepared from general modified asphalt by adding waste tire rubber powder which is 20-28% of weight of the asphalt and modifying. An ultra-thin finishing coat and low-temperature construction are realized by the asphalt mixture by adding the warm mixing additive; the ultra-thin wearing layer has the advantages of low construction cost, convenience in construction and the like, and is suitable for building of an asphalt concrete pavement and function-improving works of the pavement.

The invention provides a waste tire recycling method and device. The method comprises the following steps: placing a waste tire to be recycled on a workbench; driving the waste tire to rotate at a low speed with a driving device; arranging rotatable sprayers at the radial periphery of the waste tire, wherein at least two nozzles into which high-pressure water jets can be connected are arranged on each sprayer; starting a high-pressure water pump when all the nozzles are aligned with corresponding working positions of the waste tire, wherein water flows sprayed from the nozzles form high pressure water jet cutters to impact and cut the surface of the waste tire, and decompose the surface of the waste tire layer by layer, peeled rubber granules flow into recovery tanks with sprayed liquid, and wires and fiber are recycled in a centralized manner after being peeled off. As the high pressure water jet treatment technology is used for recycling the waste tire, the treatment process can be simplified, the production efficiency is improved, the energy consumption can be reduced effectively, the whole treatment environment is dust-free and smoke-free, and waste water of treatment can be recycled after filtering; meanwhile, as water jets serve as a non-contact tool, the problem of mechanical knife abrasion is solved, the halting time for maintenance can be shortened, and the treatment cost is reduced.

The invention provides pitch modified from waste tire rubber powder and a preparation method thereof. The preparation method comprises the following steps of: heating 2-14 parts by weight of heavy fraction oil to 90-130 DEG C; adding 84-97.8 parts by weight of waste tire rubber powder and 0.2-2 parts by weight of additives to evenly mix; radiating the mixture by a microwave for 3-10 min; adding 60-85 parts by weight of pitch to 15-40 parts by weight of modified waste tire rubber powder at 160-200 DEG C to mix evenly; and shearing the mixture at a high speed to obtain a mixture, i.e. the modified pitch of the invention. By selecting waste tires as raw materials, the invention has simple and easily obtained raw material, cost saving, environmental protection and pitch performance improvement. The waste tire rubber powder is decarbolized under the microwave radiation to improve the storage stability of the modified pitch. Meanwhile, the waste tires are utilized. The invention has simple modified pitch preparation process and strong practicability.

The invention relates to a modified asphalt mixture and preparation and construction methods thereof, particularly relates to rubber modified asphalt and preparation and construction methods thereof and belongs to the technical field of engineering. The rubber modified asphalt and the methods solve the construction problem that the mixture is thick and sticky by adding trans-polyoctenamer rubber (TOR) into the asphalt mixture, further reduce the stirring temperature of the rubber asphalt mixture, reduce processing equipment, improve production process, and are favorable for preventing water damage by a design method of continuous dense gradation. The preparation process of the mixture improves the using performance of the rubber asphalt mixture. The rubber modified asphalt and the methodshave the advantages of promoting the comprehensive utilization of waste tires by paving asphalt pavements with waste rubber powder modified asphalt, reducing great environment stress brought by blackpollution, saving resources, improving the pavement performance of the asphalt mixture, improving the service quality of the pavement, prolonging the service life of the pavement, reducing cost, and improving performance of products. Compared with the conventional modified asphalt production process, the preparation and construction methods have the advantages of energy saving and environmental protection and are convenient for construction.

The invention provides a light stone-imitating particulate matter and a water-based stone-imitating coating prepared by adopting same, and belongs to the technical field of water-based architectural coatings. The preparation method comprises the following steps: smashing or cutting waste or a leftover material of rubber, resin and engineering plastics or reclaimed rubber into particles, coating a colored film on the surface to prepare the light stone-imitating particulate matter. The water-based stone-imitating coating prepared by adopting the stone-imitating particulate matter comprises the following ingredients in percentage by weight: 8-30% of emulsion, 30-80% of a light stone-imitating particulate matter, 1-40% of an inorganic pigment filler, 1-8% of a wetting dispersant, 0.5-8% of a thickening agent, 0.1-5% of an antifoaming agent, 0.5-5% of a film coalescing aid, 0.1-1% of a mildew inhibitor, 1-10% of an anti-freezing agent, and proper amount of water, wherein the pH value is regulated to be 8-9.5 with a pH regulator. The imitated stone is life-like, and presents strong artistic feeling. As the specific weight of the light stone-imitating particulate matter is low, the flexibility is good, and the abrasiveness to a mixing plant is low; a lot of thickening agents or anti-setting agents are not required to be added, and the prepared stone-imitating coating has high stability, long storage life, and convenience in construction. Moreover, the technology avoids black pollution such as waste tires, and is beneficial to environment protection.

The invention discloses a method for preparing recycled aggregate concrete from steel fiber rubber and slag. The method comprises the following steps: waste concrete is crushed, separated, screened, washed and dried to obtain waste concrete recycled aggregate; waste tires are coarsely crushed, separated, washed and dried to obtain steel fiber rubber particles; the slag is crushed, screened, magnetically separated and classified by air to obtain slag powder; the waste concrete recycled aggregate, the steel fiber rubber particles, cement slag powder mixture, natural coarse aggregate, sands and water are stirred in proportion; the cracking resistance, thermal insulation performance and energy absorbing and noise reducing performance of the recycled aggregate concrete can be effectively improved by modifying the steel fiber rubber particles; the working performance of green concrete and contraction performance of the concrete in each curing time can be improved by modifying the slag powder; and the infiltration resistance and carbonization resistance can be effectively improved and chloride ion diffusion velocity of the concrete can be effectively reduced. The material is a cycled economical building material, and can improve the material performance on the basis of not increasing cost.

The invention discloses a waste tire thermal cracking device which comprises a waste tire breaking device, a thermal cracking furnace, an oil gas recycling system, a smoke discharge system and a solid material recycling system, wherein the thermal cracking furnace is provided with a closed furnace body; a smoke-through chamber is arranged between the inner wall of the thermal cracking furnace and the furnace bed body and communicated with a combustion chamber; a rotary central spindle is arranged at the central part of the furnace bed body; multiple layers of material chambers are arranged in the furnace bed body from top to bottom; the rotary central spindle is provided with a stirring device extending into each material chamber; a furnace section is arranged between adjacent material chambers and comprises an inner blanking furnace section and an outer blanking furnace section; the broken waste tire is heated layer by layer by the closed thermal cracking furnace for thermal cracking; the generated oil gas is condensed and recycled, and the uncondensable combustible gas heats the thermal cracking furnace through the combustion chamber; and moreover, effective recycling of residual value and environment-friendly discharge are realized through the smoke discharge system and the solid material recycling system. Continuous production can be realized, the energy is saved while the environment is protected, and the problem of pollution of waste tire is solved.

The invention discloses a method for producing gelatine powder under normal temperature by using waste tires, which relates to the technical field of producing gelatine powder under normal temperatureby using waste rubber products, and comprises the detailed steps of: a. separating a tire bead; b. crashing the tire; c. separating steel wires; d. magnetically separating for the first time; e. screening for the first time; f. magnetically separating for the second time; g. screening for the second time; and h. screening for the third time. The method has simple technique, is convenient for large-scale industrial production, and has lower investment and production cost; the grain diameter quality of the produced gelatine powder is stable; moreover, the method can produce the gelatine powderwith different grain diameter specifications, thus meeting the demands of different users.

The invention discloses a non-curing rubber asphalt waterproof material and a preparation method thereof. The non-curing rubber asphalt waterproof material comprises raw materials in parts by weight as follows: 30-70 parts of base asphalt, 15-40 parts of waste tire rubber powder, 0.25-1.0 part of a desulfurizing agent, 0.8-4 parts of a composite modifier, 0.5-5 parts of a softening agent, 0.25-3 parts of a cross-linking agent and 5-15 parts of filler, wherein the grain size of the waste tire rubber powder is 20-80 meshes. The preparation method comprises steps as follows: raw material preparation, hot melting and mixture homogenization are performed; finally, the cross-linking agent and the filler in parts by weight are sequentially added to a storage tank and are stirred and mixed for 15-20 min, and the non-curing rubber asphalt waterproof material is formed. The waste tire rubber powder is directly subjected to circular shearing desulfurization by a high-shear homogenizer under the action of the desulfurizing agent in a high-temperature asphalt medium, rubber molecules are uniformly dispersed in an asphalt system in a linear structure manner and then form a stable stereoscopic meshed rubber structure with the filler under the action of the cross-linking agent, and the product performance is more stable.

The invention discloses a disc-type microwave continuous splitting device. The disc-type microwave continuous splitting device comprises a feeding assembly, a microwave splitting assembly, a discharging assembly and a control assembly which are sequentially communicated with one another, wherein the microwave splitting assembly comprises a microwave generator, a nonmetal sealing plate, a splitting cavity, a rotating disk and a disk driving motor, the nonmetal sealing plate is used for dividing the splitting cavity into an upper part and a lower part, the rotating disk is arranged at the lower part of the splitting cavity and is matched with the disk driving motor in a driving rotation manner, and the microwave generator is arranged on a circular flange on the splitting cavity. The invention aslo discloses a method for splitting waste rubber by using the splitting device; the disc-type splitting cavity is adopted in the method and is divided into an upper cavity and a lower cavity through the nonmetal sealing plate, so that the microwave splitting efficiency of waste tires is improved; and in order to ensure the stable operation of a disk and prevent the high-temperature deformation, one or a plurality of annular guide rails are arranged on the lower surface of the rotating disk and are used for supporting the rotating disk, so that the rotating disk rotates on a guide rail so as to optimize the splitting effect.

The invention relates to composite materials, in particular to a tire rubber powder modified recycled plastic and a preparation method thereof. The invention aims to solve the existing zero pollution reclamation difficulty and other problems of waste tire rubber, waste plastics, etc. The tire rubber powder modified recycled plastic provided in the invention is prepared from the following raw materials by mass: 20%-70% of waste plastics, 10%-40% of tire rubber powder, 5%-26% of a flame retardant, 1%-10% of a compatibilizer, 0.1%-3% of a lubricant, 0.5%-5% of a plasticizer, and 0.05%-4% of an antioxidant. In the invention, by modifying tire rubber powder to prepare the recycled plastic, the resource utilization rate of waste tire rubber powder is enhanced, a new application technology of rubber powder is developed, the application scope of rubber powder is expanded, and at the same time, the prepared recycled plastic still has good mechanical properties, and the production cost of the recycled plastic is greatly reduced, so that the application fields of recycled plastics can be expected to be further expanded.

A device and process for the vacuum pyrolization of scrap tires to produce a pyrolytic oil from which valuable terpenes such as limonene and pulegone may be extracted and purified.

The invention belongs to the technical field of porous pavements and particularly relates to a porous pavement partially taking steel slag as a coarse aggregate and taking rubber asphalt as an adhesive. In the porous pavement partially taking the steel slag as the coarse aggregate, the thickness of a structural layer of the porous pavement is between 2.0 and 4.0 centimeters; and the maximum nominal particle size of a construction mixture is 9.5 millimeters. The porous pavement consists of the coarse aggregate, a fine aggregate and a filler, wherein the coarse aggregate is the mixture of the steel slag coarse aggregate and a natural stone coarse aggregate; the fine aggregate is a limestone, diabase or basalt aggregate; and the filler is cement or the mixture of limestone mineral powder and slaked lime. The used rubber asphalt is produced from waste large tire rubber powder of which the particle size is more than or equal to 20 meshes and smaller than or equal to 40 meshes. Traffic and environmental problems caused by a nonporous pavement are solved to the greatest extent, the long-term pavement performance of an asphalt pavement is improved by using the steel slag and waste tires, the supply pressure of a high-quality aggregate is relieved and engineering cost is lowered.

The invention discloses a method for preparing steel fiber rubber particle modified asphalt recycled aggregate concrete. In the method, waste concrete is subjected to crushing, separating, screening, washing and drying to obtain the recycled aggregate, and the recycled aggregate is stirred with emulsified asphalt until the emulsified asphalt is covered on the surface of the recycled aggregate; waste tire is subjected to coarse crushing, separating, washing and drying to obtain the steel fiber rubber particle; and the recycled aggregate containing the emulsified asphalt, steel fiber rubber particles, natural aggregate, cement, sand and water are stirred according to certain ratio to obtain the steel fiber rubber particle modified asphalt recycled aggregate concrete. In the invention, the waste tire is subjected to crushing process to produce the steel fiber rubber, and the crack resistance, the heat preservation capability and the energy absorption and noise reduction capability of the asphalt recycled aggregate concrete are effectively improved by the modification of the steel fiber rubber; and the material is a circular economy building material, and by producing the material, the environmental pollution is reduced, and the performance of the material can be improved under the condition of not increasing cost.

The invention relates to a carbon black purification process, and in particular relates to a purification process of pyrolysis carbon black of a waste tire, which comprises the steps of washing with acid, washing with alkali, and performing acid washing once again to carbon black which is subjected to acid and alkali washing processes. According to the purification process, the ash content of carbon black is reduced to 2.6 percent from 18.7 percent, the volatile component content is reduced to 5.0 percent from 9.5 percent, and the reinforcing property to rubber is superior to that of a semi-reinforcing carbon black and basically reaches the reinforcing level of N330. The acid-wash filtrate generated in the production process can be reused in a purification system after being adjusted.

The process of continuously thermal decomposing waste tire in a gas burning kiln belongs to the field of solid waste treating technology. The process includes setting cleaned and air dried waste tire and catalyst in the thermal decomposing container on a push plate, pushing the container with a hydraulic device into the tunnel kiln via a sealing cabin, moving the push plate on rollers and pushing out the thermal decomposed product; condesing the gaseous product exhausted from the kiln top in a condensator to obtain mixed fuel oil or returning the gaseous product to the kiln for use as heat source; and collecting the carbon slag from the container for preparing carbon black filler and other material. The present invention can operate continuously, has great treating capacity, low power consumption and other advantages, and may be used in treating other solid wastes.

The invention discloses a rubber idler of a belt conveyor, comprising an idle shaft and an idler steel pipe; a wear-resistant buffer layer with an arc outer surface consisting of more than one rubber rings of waste tires is sleeved on the idler shaft in the manner of interference. The invention also discloses a method for manufacturing the rubber idler of the belt conveyor. A wear-resistant idler, a buffer idler, a comb-shaped idler, a taper aligning idler, a friction aligning idler and a rubber aligning idler made of the rubber rings of waste tire are applied. Under the precondition of guaranteeing the sealing performance of the idler, the idler steel pipe or the shaft is sleeved by the wear-resistant idler, the buffer idler, the comb-shaped idler, the taper aligning idler, the friction aligning idler and the rubber aligning idler made of the rubber rings of waste tire. The idlers have comprehensive functions such as anti-corrosion, anti-tarnishing, abrasion resistance, compact resistance, aging resistance, tear resistance, light weight and large elastic force. In addition, the idlers can protect the belt and largely prolong the service life of the belt.

The invention belongs to the technical field of building materials used in road engineering, particularly relating to a high-strength wear-resisting rubber bituminous mixture partially using slag as coarse aggregate. The mixture comprises slag coarse aggregate, natural stone coarse aggregate, fine aggregate, filler and rubber asphalt, wherein part of coarse aggregate is the slag; part of coarse aggregate is basalt, diabase or limestone; the fine aggregate is limestone, diabase or basalt; the filler is cement or a mixture of limestone mineral powder and slaked lime; and the rubber asphalt is produced by selecting waste cart tire rubber powder with a granularity greater than or equal to 20 meshes and lower than or equal to 40 meshes. The invention fully utilizes the slag, waste tires and other waste materials and turns waste into wealth, thereby effectively relieving environmental pollution caused by the slag and the waste tires. The mixture is a dense grade bituminous mixture using the slag as the coarse aggregate and using the rubber asphalt as a matrix, which has good high-temperature stability, low-temperature crack resistance, normal-temperature fatigue resistance and other performances, and is applicable to various traffic road engineering.

The invention relates to wide temperature range modified asphalt for roads. The asphalt is composed of, by weight, 80-90 parts of matrix asphalt, 1-6 parts of SBS (styrene-butadiene-styrene) modifier, 10-30 parts of activated waste tire rubber powder, 2-6 parts of light oil, 0.1-0.5 part of terpene resin and 0.1-0.5 part of elemental sulfur. The wide temperature range modified asphalt for the roads has good performances of being free of flowing at high temperature and being free of cracking at low temperature, usage temperature range can reach higher than 100 DEG C, the preparation method is simple, and production can be directly performed on original SBS modifier production devices, so that cost investment of production equipment is reduced.

The invention relates to an automatic waste tire dicing production line comprising a tire material supply device, an automatic tire splitting cutting device, an automatic tire overturning device, a tire slitting machine, a tire dicing machine, an opening ring conveyer belt, a rubber block conveyer belt and an opening ring frame. According to the automatic waste tire dicing production line, the whole system achieves continuous operation, the automation degree is high, the cost is low, and cutter wear is slow.

The waste tire pulverizer includes waste tire inner ring cutting and separating machine, tire crushing machine, steel wire separating machine and waste tire rubber pulverizing machine. The rubber powder preparing process with waste tire includes: cutting and separating waste tire inner ring, crushing tire, separating steel wire and eliminating iron and crushing rubber. The rubber pulverizing machine is provided with wear-resistant high-hardness WC alloy cutters embedded in the inner conic surface of the conic stator and the outer conic surface of the conic rotor, and cooling water cavity in the conic stator and the conic rotor to control temperature raise, so that it can crush rubber into rubber powder of over 60-mesh fineness at normal temperature. The present invention has long service life, fine size of rubber powder, low power consumption and low cost.

The invention belongs to the technical field of asphalt pavement materials and relates to a waste superpolymer based comprehensive asphaltic-mixture modifier and a preparation method and application thereof. The comprehensive asphaltic-mixture modifier comprises the following inorganic mineral filling materials in parts by weight: 30-60 parts of waste/reclaimed polyethylene particles, 20-50 parts of waste tire rubber powder, 10-20 parts of SBS, 5-15 parts of fiber and 0.5-1.5 parts of carbon black. The preparation method comprises the steps of raw material mixing, stirring, heating, mixing, extrusion and cutting. An application method of the comprehensive asphaltic-mixture modifier is simple, and the comprehensive asphaltic-mixture modifier of which the weight accounts for 0.1-0.3 percent of the weight of ores can be directly added to a mixing kettle. The product provided by the invention can comprehensively improve the high-temperature rutting resistance and low-temperature crack resistance of an asphaltic mixture and has remarkable economic benefits and social benefits.

The present invention is a method of using crumb rubber from recycled tires as a filter media. The use of crumb rubber as a media differs from conventional sand or anthracite filters in several ways. The crumb rubber media is compressible which allows the porosity between rubber particles to decrease through the filter bed. The crumb rubber media compresses as headloss increases, allowing for better effluent quality late in the run. The crumb rubber media allows greater depth filtration. The crumb rubber media can be used at high filter rates, greater than 20 gpm/ft². The crumb rubber media performs similarly to other traditional filter media in respect to turbidity and total suspended solids removal. The crumb rubber media properties are closely tied to media size and shape, with smaller media providing better effluent qualities and larger media allowing longer filter runs at higher flow rates.