Method of processing waste rubber products with metal cord

 

The invention relates to the chemical processing of organic waste, in particular to the field of recycling of waste rubber products, and can be used in the metallurgical industry. Recycle waste rubber products with metal cord, reduce them to a size 3-0 mm adopted for components of coal charge. Crushed crumbs served in the coal charge in the coking without removing the cord up to 4% by weight of the mixture when the ash content in the charge is not more than 10%. The technical result consists in the recycling of waste rubber products with metal cord, simplify the method of their processing, improving quality and increasing output of metallurgical coke and chemical products of coking. 3 table.

The invention relates to the field of chemical processing of organic waste, in particular to the field of recycling of waste rubber products, and can be used in the metallurgical industry.

Known use as a substitute for coke in blast furnace smelting waste rubber products - worn tires, which are crushed into pieces with a weight of 0.3-2, is waiting for the layers fluco ore part of the charge and the overlying layer of coke in each supply; reactivity rubber should be 1.5-15 ml/year; must comply with the equality between the amount of oxygen in the oxides of iron ore part of the charge and carbon substitute coke [U.S. Pat. Russia N96115131/02 Arshansky M. And Volkov , A. N., Komrakov Y. S. and other Method for blast-furnace production. BI. N 33, 1998]. The disadvantages of the method of disposal: the complexity, lack of implementation, limited reactivity, i.e. not all types of rubber-products can be used, it is not used chemical potential of rubber, increase emissions of soot and polycyclic hydrocarbons in the blast furnace gas burning rubber is carburizing iron due to the increased allocation of carbon black and the negative impact of sulfur on the quality of cast iron.

The closest in technical essence and the achieved result is a way of recycling waste rubber pyrolysis and spiralize about coal. When high-temperature spiralize waste rubber with a large excess of coal at a low heating rate (3oC/min), corresponding to the conditions of coking obtained heating the coke yield 70-75% with low ash content and high reactivity, which is used as a smokeless fuel, organickych odpadu. Cast//Uhli-rudy. -1992.-1.,N 10.- S. 351-355.- the Czech. Abstract journal "Chemistry". N 9.1992. P. C. 4-5]. The disadvantages of the method: the production of only heating, but not of metallurgical coke, low output; production of oil and not valuable aromatic products, the need to build special pyrolysis plants and plants for the recovery of chemical products of pyrolysis, i.e., high capital and operational costs due to the need for collection and transportation of rubber waste over long distances.

The objective of the proposed invention is to cheapen and simplify the recycling of waste rubber products with metal cord in the charge in the coking about the purpose of increasing the quality and yield of metallurgical coke and chemical products of coking.

We propose a method of processing waste rubber products, including feeding them into the coal charge in the coking, characterized in that the waste rubber products, used waste rubber products about steel cord, reduce them to a size 3-0 mm adopted for components of coal charge, and served after grinding the coal charge in the coking without removing the cord logicheskogo coke and chemical products of coking.

The technical result achieved by using the proposed method consists in the following: - more efficiently, reducing the cost of removing the steel cord disposed of waste rubber products with obtaining metallurgical coke and valuable chemical products; - increased yield and quality of metallurgical coke; - increased output of coking benzene and coal tar; - efficiently and more effectively cleaned exhaust gases from the pyrolysis of waste rezinotehnicheskih products together with products coking plants capture and processing of chemical products of coking; - processed all types of waste rubber products directly on the site of their most popular education at the metallurgical enterprises (tires, conveyor belt and other); - simplified technology of waste rubber products with metal cord; - excludes capital costs for construction of facilities for the pyrolysis of waste rubber products, as well as used equipment existing coke production.

Check the conformity of the invention and other trebol sources. A comparison of the claimed technical solution with the prototype allowed us to establish its compliance with the criteria of the invention of "novelty."

The set of essential characteristics: particle size, a certain percentage of waste rubber products with metal cord in the charge for coking, liberties mixture allow to solve the problem of their professional large-scale utilization of obtaining a technical effect consists in the improvement of the strength properties of coke, increasing the yield of valuable chemical products of coking. This allows to speak about the essential differences of the proposed invention and the satisfaction of their this criterion.

The features distinguishing the claimed method from the prototype, have not been identified in other technical solutions in the study of this area and provide the claimed solution according to the criterion of "inventive step".

A new technical result of the claimed method consists in the following: in complex large-scale recycling of all types of waste rubber products with metal cord in the existing by-product coke manufacturing; increase the yield and quality of metallurgical coke and the increase in output is valuable is isotechnika products steel cord in the charge in the coking they should be finely crushed one of several existing methods for crushing rubber (mechanical, cryogenic, pressure and so on ). As the study material was used crumb rubber obtained by crushing waste tires with steel cord mechanically to a particle size mm 3-0 adopted for components of coal charge. The use of larger particles of waste rubber products leads to deterioration of the quality of coke (PL. 3, example 5), especially the abrasion (P10and structural strength (Pwith).

Physico-chemical characterization of crumb rubber with steel exhaust rubber products are presented in table.1. It discusses the basic properties of the exhaust resintech-technical products from the point of view of their possible use as a component of the coal charge. From the data table.1 shows that waste rubber products are mainly hydrocarbon material containing 88.8% of the carbon and to 7.61% hydrogen. These data and studies described in the literature, suggest that thermal decomposition of rubber leads to the formation of hydrocarbon structures, chemically compatible with the products of pyrolysis of the coal material. In addition, it is known that for the domain of process p is about to slagging additional consumption fluxes and coke, contributing in the process of Ironmaking its small share of metal. This makes possible the use of waste rubber products without removal of the steel cord as a component of the coal charge in the process of production of metallurgical coke.

Testing of waste rubber products with metal cord in the coal charge was conducted by coking basic and experienced blends in a laboratory furnace with loaded 2 kg according to GOST 9521-74. The basic mixture composed of components production of coal charge JSC "ZSMK".

The optimum vintage blend of Kuznetsk coals for the production of high-quality metallurgical coke consists of the following components: - considerate basis - coal grades GZH, W, QL - 40-45%; - coke group - coal grades K, KO, FA - 35-40%;
- inert additive - coal grades UNC, COP - 15-20%.

Such a composition provides an optimal blend: volatile content on dry basis (Vd) - 25.0% of the thickness of the plastic layer (y) - 14 mm or more, the vitrinite content (Vt) - >60%, the reflectivity of vitrinite (Ro) - >1,12%.

In practice it is difficult to withstand the optimal composition of the charge due to the scarcity of certain grades of coal, irregular supply. Poetic at least satisfactory quality coke.

At the time of testing production batch of JSC "ZSMK" had the composition and quality, are presented in table. 2. From this mixture in the production conditions of the metallurgical coke that meets the technical requirements. Therefore, this charge and coke out of her taken as a baseline for comparison with the experimental charge and Katsumi.

To obtain experimental blends of crushed waste rubber products steel cord was introduced in the basic charge to replace part of the coal component in the amount of 3-7% by weight of the mixture. The share of steel in waste rubber products was 20%, which corresponds, approximately, to the content of this component in the tires.

Research quality components of the charge, charges and coking products was carried out in accordance with existing procedures; technical analysis Standards-11014-81, 27589-91, 11022-95, 6382-91, 8606-93; plastometer analysis GOST 1186-87; elemental analysis GOST 27044-86, 2408-275; define maksuameti coal GOST 9521-74; output of chemical products of coking GOST 18-635-73, reactivity GOST 10089-89.

Examples the proposed method of processing waste rubber products with metal cord in charge notany rubber products with metal cord has increased its ash content (d) 8,3 (basic charge) to 10.5% (mixture containing 7% additives). Accordingly, increased the ash content of coke - c of 11.4 to 13.3%. The increase in ash content was due to the steel cord, which is a useful component in the coke for blast furnace production. The thickness of the plastic layer of the charge (y) remained at the level 16-15 mm, shrinkage (X) increased slightly. Coke from charges c rubber and steel cord was characterized by a high yield of large classes (table. 3). Adding exhaust rubber products with metal cord in the mixture in an amount up to 4% improves strength properties (P25P10Pwith) get coke. It is characterized by the following quality indicators, %: output class +40 mm = 86,5; output class +25 mm = 95,2; strength of coke for P25= 92,2; abrasion P10= 7,1; the structural strength of the Pwith= 78,2, i.e. compared to the baseline Cox these indicators have improved, %: output class +40 mm - 20.4; output class +25 mm - 0.7; P25-2.5; P10- 0.6; Pwith- 0.2. Reactivity of coke increased slightly: from 0,40 to 0.46 cm3/gC.

Further increase in the content of waste rubber products with metal cord in charge (swirl Pwith). It is associated with increased ash content of the charge. Therefore, when the content of waste rubber products c steel cord in the charge up to 4% and ash content of the mixture to 10.0% of the coke increased strength of the increase in the output of large classes.

The introduction of waste rubber products c steel cord in coal blends increased the output of valuable chemical products of coking: tar, crude benzene (table.3).

Mastering the declared will allow qualified to be disposed of on site waste rubber products with metal cord, to reduce capital and operating costs for their disposal, to increase the output and quality of metallurgical coke and chemical products of coking. The claimed method is industrially applicable in each by-product coke plants.


Claims

Method of processing waste rubber products, including feeding them into the coal charge in the coking, characterized in that the waste rubber products using waste rubber products with metal cord, reduce them to a size 3-0 mm adopted for components of coal charge, and served after ismel the Institute of ash in the mixture is not more than 10%.

 

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Polymer composition // 2190642
The invention relates to the field of polymeric compositions based on polyethylene for cable industry

FIELD: rubber industry.

SUBSTANCE: invention, in particular, relates to reusing worn out motor car tires and mechanical rubber ware by processing them into fuel oil and liquid and solid matters that can be used as raw material for various production processes. Processing of rubber-containing waste comprises fluidization of waste in hydrocarbon solvent (benzene) at 280-320°C, separation of liquid fraction, and distillation thereof to produce desired products. According to invention, prior to be fluidized, waste is treated, in atmosphere of gas, which is inert to initial waste, with destruction products in excess benzene until complete swelling is attained, after which excess benzene is separated and recycled to the head of process. Thermal fluidization is conducted in the same gas atmosphere, while simultaneously separating liquid fraction and obtaining fuel oil as target product and benzene, a part of which being returned into process. Inert gas is preferably carbon dioxide and heating to 280-320°C is provided by high-frequency currents at thermal fluidization pressure up to 2 atm.

EFFECT: reduced expenses and improved environmental safety of processing due to wasteless technology.

4 cl

FIELD: construction; manufacture of porous coatings used on different objects of construction and production of sport and other destination items.

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EFFECT: the invention ensures simplification of the method of the coating manufacture at improved quality of items.

8 cl, 1 ex

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EFFECT: the invention ensures simplification of the process, increased efficiency and homogeneity of the sorbent.

1 tbl, 11 ex

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SUBSTANCE: processing of rubber-containing waste designed for use in petrochemical, petroleum processing, and road building industries is accomplished by catalytic cracking of rubber-containing waste mixed with petroleum residues in presence of zeolite at 390-450°C, pressure 0.2-5.0 MPa for 30 to 90 min. As petroleum residue, preliminarily thermally treated petroleum residue freed of distillate fractions is preferably used, more preferably the same with other petroleum residues added.

EFFECT: enabled joint production of distillate fractions and quality bitumen.

3 cl, 4 ex

FIELD: composite materials on base of thermoplasts; injection molding of various parts, parts for railway engineering in particular: insulating bushes and locks of contact system, elastic insulating gaskets on wooden and concrete sleepers and busbars for switches.

SUBSTANCE: proposed polymer composition contains polyolefin, crumb rubber, synthetic ethylene propylene rubber and filler for micro-spheres from smoke emissions of thermal power plants; it also contains lubricant as additive. Mineral or vegetable oil at boiling temperature not below 180°C or low-molecular diane resins may be used as lubricant. Besides that, filler may contain talc. Use of smoke emissions of thermal power plant of preset composition and combination of components at definite ratio makes it possible to obtain molding compositions possessing high wear resistance, water resistance and oil resistance, low abradability at retained elasticity; increased service life.

EFFECT: enhanced efficiency.

4 cl, 2 tbl, 7 ex

FIELD: environmental protection.

SUBSTANCE: invention relates to technology of processing of rubber and petroleum processing and petrochemistry wastes and can be used to solve environmental and fuel-and-power problems. High-molecular weight petroleum products such as spent lubrication oils, mazuts, purified oil-slimes, goudrons, and mixtures thereof are first supplied to activation unit to be exposed to acoustic and electromagnetic waves. Activated petroleum products are then passed to petroleum product destruction reactor. Fractioned rubber is exposed to superheated steam and also to a part of destroyed petroleum products at 500-600°C in rubber destruction reactor. Light gaseous hydrocarbons formed in this process are burned in steam generator while released heat is used in petroleum product destruction reactor. Solid rubber destruction products are separated in separator. Liquid rubber destruction products are supplied to activation unit to be used in petroleum product destruction stage.

EFFECT: reduced environmental impact.

1 dwg

FIELD: chemical technology.

SUBSTANCE: invention relates to a chemical method for processing waste of rubber-technical articles and domestic waste. Method involves depolymerization of the parent materials with addition of an organic solvent to obtain condensate and depolymerizate. Superheated organic solvent at temperature 200-500°C under pressure 0.1-0.3 bar is used as an organic solvent. Depolymerization is carried out by using gas torch forming in Laval's nozzle and representing products of high-temperature cracking of a mixture of organic solvent and depolymerizate. Part of depolymerizate is fed into furnace by high-pressure pump wherein it is heated to temperature 600-650°C and recovered to the depolymerization zone for high-temperature cracking through Laval's nozzle with separation for fractions. Invention provides simplifying technology and decreasing the cost in waste processing.

EFFECT: improved processing method.

1 dwg

FIELD: chemical technology.

SUBSTANCE: invention relates to thermochemical processing of waste, namely, to a method for processing rubber-containing and polymer-containing waste by their thermal destruction in hydrocarbon solvent in the presence of catalyst and carrying out, in particular, in parallel with utilization of wood waste. Method for processing industrial and domestic waste involves thermal destruction of rubber-containing and/or plastic waste in medium of hydrocarbon hydrogen-donating solvent in the presence of catalyst and under increased pressure and temperature. In parallel, the method involves thermolysis of wood waste and the thermal destruction process is carried out under pressure 0.1-1.0 MPa by step-by-step increase of temperature for 6 stages in hydrocarbon solvent medium in the mass ratio waste : hydrocarbon solvent = from 1:1.5 to 1:3. As a catalyst method involves using iron chloride or aluminum chloride in the amount 0.1-2.0 wt.-% per hydrocarbon solvent and the process is carried out in battery consisting of at least 5 reactors working in parallel and joined with a device for thermolysis of wood waste. At the first stage carrying out at temperature 20-65°C the method involves swelling waste for 25-30 min, and at the second stage - thermal destruction with simultaneous sampling ester and benzene fractions at 66-90°C, at the third stage - thermal destruction and sampling volatile fractions at 91-112°C, at the fourth stage - thermal destruction and sampling mean-volatile fractions at temperature 113-144°C, at the fifth stage - thermal destruction and sampling oily fractions at temperature 145-280°C, and at the final sixth stage - thermal destruction and sampling heavy fractions at temperature 281-320°C followed by holding residues after thermal destruction of waste at 320-350°C for 15-30 min. Also, method involves addition to hydrocarbon solvent of 15-25 wt.-% of oily and/or heavy fractions of thermal destruction waste obtained from fifth and/or sixth stage of the process. In the process of carrying out thermal destruction of waste heat is used that is obtained in thermolysis of wood waste carrying out with addition of part of oily and/or heavy fractions from fifth and sixth stages of the process of thermal destruction of waste into furnace for complete combustion of fuel gases obtained in thermolysis of wood waste, and/or into furnace for thermolysis of wood waste directly and taken in the amount corresponding to the mass ratio oily and/or heavy fractions : wood waste = from 1:100 to 100:1. As a solvent the method involves the expedient using fractions of aromatic hydrocarbons or o-, p-, m-xylenes or their mixtures. Method provides enhancing the effectiveness of the process for processing waste due to enhancing yield of low-boiling fractions and decreasing energy consumptions.

EFFECT: improved processing method of waste.

1 tbl, 1 deg, 9 ex

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to a method for synthesis of oligomers used in manufacturing paint and varnish materials by using polyethylene terephthalate waste. Invention proposes the re-esterification reaction (alcoholysis) of vegetable oils and milled polyethylene terephthalate waste with pentaerythritol for a single step at heating and the following polyesterification of the alcoholysis product with phthalic anhydride and maleic anhydride in inert medium in the presence of xylene. The process is carried out up to achievement of acidic number 15 mg of KOH/g, not above, with preparing light product showing good consumers' properties. Synthesized oligomer is used for manufacturing lacquer.

EFFECT: improved method of synthesis.

2 cl, 1 tbl, 5 ex

FIELD: chemistry of polymers.

SUBSTANCE: invention relates to a polymeric composition based on secondary thermoplastic raw designated for further processing by casting method under pressure. The composition comprises secondary polyethylene and a modifying additive taken in the mass ratio = 9:1. Mixture of dicumyl peroxide and copolymer of ethylene and vinyl acetate representing industrial sevilen of type 10708-125 is used as a modifying additive. The combination of components taken in the definite ratio provides preparing the polymeric composition showing improved physicochemical properties and useful for the further multiple processing by casting method under pressure in usual industrial casting equipment.

EFFECT: improved and valuable properties of composition.

1 tbl

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