Fuel briquette fabrication process

FIELD: manufacture of building materials.

SUBSTANCE: invention relates to manufacture of molded fuel, in particular to fabrication of high-carbon fuel briquettes, which can be used when smelting cast iron in cupola-furnaces, when producing calcium carbide, silicon carbide, mineral fibers, and other materials. Process according to invention comprises mixing ground solid fuel with binder in amount 5-9% of the weight of ground solid fuel and briquetting mix followed by heat treatment of briquettes. Ground solid fuel is composed of coke fines with particle size 0.05-16.0 mm, 50-80%, and thermoantracite fines with particle size 0.05-6.0 mm, 20-50%. Binder is lignosulfonates modified with 3-5% of petroleum or petroleum products. Briquetting of mix is effected under pressure 25 MPa.

EFFECT: reduced power consumption, investment and operational expenses, increased briquette fabrication productivity, and increased strength, heat resistance, and calorific value of fuel briquettes.

3 ex

 

The invention relates to the production of molded fuel, namely vysokouglerodistymi fuel briquettes, which can be used for melting cast iron in cupola furnaces, blast-furnace production upon receipt of calcium carbide, silicon carbide, mineral fibers and other materials.

Vysokouglerodistyjj fuel briquettes, which can substitute for coke in the production of high-quality liquid iron by melting in cupola should have high heat resistance at temperatures of combustion and melting iron, i.e. the ability to withstand, without fracture, thermal stresses, high calorific value - 6000-7500 kcal/kg, low porosity and reactivity, high temperature resistance, as well as ash content less than 15%.

There is a method of producing fuel briquettes, comprising a mixture of powdered solid fuel with 3-15 weight parts of the binder is a hydraulic cement, 3-14 weight parts of water and additive, forming the mixture into briquettes, and the shutter speed to setting and hardening of cement. As the crushed solid fuel use coke, charcoal, coke, polyatract. As an additive can be used with clay or molasses (patent US 37682886, IPC C 10 L 5/00).

As disadvantages of the described method of producing fuel briquettes which can be noted, first, low productivity due to the need for pre-dosing of a large number of carbon-containing components of the crushed solid fuel, additives, and mixing the large mass of the crushed solid fuel with a binder and additives; secondly, low calorific value and high ash content when implementing the method of the fuel briquettes, due to the introduction of non-combustible components such as hydraulic cement, clay or molasses, which makes it impossible to use these briquettes for melting iron in a cupola and leads to unreasonable costs when using these pellets as an energy source in other industries.

There is a method of producing fuel briquettes, including metering and mixing the crushed solid fuel with a binder at a total content of not less than three of the binder in the number 50-50 wt.%, briquetting the mixture under a pressure of 0.5 to 120.0 MPa and shutter briquettes at ambient temperature for 0.5-40,0 including Powdered solid fuel in an amount up to 100 wt.% use of a group of plant waste and/or coal and/or coke breeze, carbonaceous shale, and/or dried manure, or poultry litter, or a mixture of the last three components. Binder in the amount of 1-8 wt.% use of GRU the dust, comprising lignosulfonate, molasses, tallow, pitch or mixtures thereof. An additional binder in the amount of 1-7 wt.% used from the group comprising synthetic wax, or paraffin wax, or paraffin GAC. As another additional binder comprising 1-20 wt.%, use and/or cement, or clay. As an additional binder comprising 2-25 wt.%, use sludge from wastewater treatment. The calorific value of the fuel briquettes produced by this method is 3350-6850 kcal/kg and ash content up to 28% (patent RU 2147029, IPC710 L 5/12, 5/14, 5/16, 5/40).

The disadvantages of this method of producing fuel briquettes are, first, low productivity due to the use of multicomponent compositions of powdered solid fuel and a binder, complicating their dosing and mixing; second, the high ash content up to 28% is obtained by implementing the method of the fuel briquettes, due to the introduction of a large number of non-combustible binder components, which makes it impossible to apply these briquettes for melting iron in a cupola.

Closest to the proposed invention by the technical nature (prototype) is a method for producing briquettes, comprising a mixture of powdered solid fuel from coke breeze particles with the size of 6.0-2.5 mm in which Alceste 15-25 wt%, 2.5 to 1 mm in the amount of 15-35 wt%, less than 1 mm up to 100 wt%, and a binder on the basis of modified lignosulfonate in an amount of 3-10% by weight of the crushed solid fuel briquetting mixture under a pressure of 5 to 90 MPa and subsequent heat treatment of the briquettes at a temperature of 200-700°C for 10-120 minutes. At the same time as the binder used lignosulfonate or sodium salt of methylenephosphonate modified 10-30 wt% of the additive bottoms of the distillation of tall oil. Fuel briquettes obtained in this way, when the moisture content of the feedstock 8-9% and after heat treatment have a compressive strength not less than 90 kg/cm2density of 1.25-1.30 grams/cm3content , ash content of 12-13% (patent RU 2083642, IPC6C 01 L 5/20, 5/28).

The above method of producing fuel briquettes has the following disadvantages:

- increased costs of electricity, firstly, due to the use as a powdered fuel only solid coke fines with low plasticity and, consequently, poor compaction during briquetting, which requires additional energy to achieve the necessary strength of briquettes after pressing; secondly, the humidity of the raw materials, component 8-9%, also contributes to more energy on it deleted the e during the heat treatment;

- increased capital costs, further increasing electricity costs, due to the need of installation of the equipment for the dispensing of precise ratios of the indicated particle size of the coke breeze, in particular, rassimov and dispensers, and for the separate storage of coke breeze with different ratios of particle sizes, for example, in bunkers;

- low productivity, firstly, by having multiple dosing of powdered solid fuel from coke breeze with different ratios of particle sizes, secondly, due to the stiffness and, consequently, low plasticity coke breeze, hinder compaction, and hence the process of briquetting the mixture;

- decreased strength and heat resistance is obtained by the method of fuel briquettes, which is also due to the low ductility of the coke breeze, which is used as a powdered solid fuel;

- lower calorific value of fuel briquettes produced by the method, due to not high enough carbon content of the coke - up to 85 wt.% when the ash content of 12-13%.

The present invention is to reduce energy consumption, capital costs, and improve performance in the implementation process of the floor of the treatment of fuel briquettes, as well as increasing strength, heat resistance and calorific value of fuel briquettes obtained by the proposed method.

To achieve the technical result in the method of producing fuel briquettes, comprising a mixture of powdered solid fuel on the basis of coke breeze with a binder on the basis of modified lignosulfonate in the number of 8-9% by weight of the crushed solid fuel briquetting mixture and subsequent heat treatment of the briquettes according to the invention as a powdered solid fuel use coke breeze with particle sizes of 0.05-16,0 mm in the amount of 50-80 wt.%, thermoanalytical fines with a particle size of 0.05 to 6.0 mm in the amount of 20-50 wt.%, and use a matrix of lignosulfonate modified 3-5 wt.% oil or oil products, and the briquetting mixture is performed under a pressure of 25 MPa.

The lower energy process for the production of fuel briquettes related to the introduction of crushed solid fuel thermoantracite things with greater ductility and lower strength than coke breeze, and, therefore, contribute to the improvement of the conditions of pressing and reduce energy consumption in the absence of additional energy costs for removing excess moisture when heat-treated briquettes.

p> Reduction in capital costs, further reducing the cost of electricity due to the lack of necessary equipment design method, which implements the dosing and separate storage of coke breeze with different ratios of particle sizes.

Improving performance in the implementation process for the production of fuel briquettes caused by reducing the complexity of the briquetting mixture of crushed solid fuel with a binder due to the use of less durable than coke breeze, plastic thermoantracite stuff that allows you to facilitate compaction of the mentioned mixture.

Increase strength and heat resistance of the fuel briquettes produced by the method, related to the introduction of crushed solid fuel thermoantracite stuff, which is more ductile material than coke breeze, which leads to the mobility of the mixture during its seal in the briquetting process and to the production of a dense solid briquettes, capable of a long time to withstand, without breaking, high temperatures.

The increase in calorific value of fuel briquettes produced by the method, due to the high carbon content in thermoantracite - 89,5 to 96.5% with low ash - 6%; calorific value of ermantraut as high grade E. ereticheskoe fuel at 500 kcal/kg higher calorific value of coke. To increase the calorific value of the fuel briquettes promotes and modification of lignosulfonate 3-5 wt.% petroleum or petroleum products, preferably of oil asphalt, as they have a high calorific value. In addition, in the modification of lignosulfonate 3-5 wt.% the oil asphalt additionally increase the strength and resistance of the fuel briquettes.

The particle size of the coke breeze, components of 0.05-16,0 mm are optimal, as the coke breeze particles with a size less than 0.05 mm contain large amounts of inorganic dust and sand, which contributes to the increase in ash content and reduction of the calorific value of the obtained briquettes and coke breeze particles with sizes more than 16,0 mm worsen conditions compactibility of the mixture of the crushed solid fuel with a binder and are not waste fuel and impractical to briquetting.

The size of the particles thermoantracite little things that make up 0.05 to 6.0 mm are optimal, since the particles thermoantracite detail with dimensions of less than 0.05 mm contain large amounts of inorganic dust and sand, which contributes to the increase in ash content and reduction of the calorific value of the obtained briquettes, and the particles thermoantracite trifle larger than 6.0 mm are the fuel, and not waste, and getting toplin the x briquettes using particles thermoantracite trivia, having a size of more than 6.0 mm, it is not economically feasible due to high cost of such particles, 6 times higher than the cost of particles thermoantracite detail with dimensions 0,05-6,0 mm

The selected ratio between the amount of coke breeze with particle sizes of 0.05-16,0 mm, comprising 50-80 wt.% the crushed solid fuel, and the number thermoantracite stuff with particle sizes of 0.05-6.0 mm, comprising 20-50 wt.% the crushed solid fuel, are optimal, since the content in the powdered solid fuel is less than 20 wt.% thermoantracite things difficult for the compaction of the mixture of the crushed solid fuel with a binder with increase in the composition of the crushed solid fuel amount of coke breeze more than 80 wt.% and significantly decreases the calorific value of fuel briquettes and add in the powdered solid fuel thermoantracite trifle more than 50 wt.% with a decrease in the composition of this fuel amount of coke breeze less than 50 wt.% leads to reduction in strength and heat resistance of the obtained briquettes at a relatively high calorific value and a stable relative humidity of 0.8±0,2%, ash - 14±1%, total sulfur and 0.5%, volatile - 4±2%.

The use of a binder of lignosulfonate in an amount of 3-10% by weight of the crushed solid fuel is Dogo fuel modified 3-5 wt.% oil or oil products, is optimal because the modification of lignosulfonate oil or oil products in the amount of less than 3 wt.% can not get fuel briquettes with the proper strength, and modification of lignosulfonate oil or oil products in the amount of more than 5 wt.% it is not economically feasible due to high cost of oil and petroleum products.

Briquetting the mixture under a pressure of 25 MPa allows the use of crushed solid fuel coke breeze with relatively large particle sizes up to 16 mm, providing high density and strength of the resulting briquettes. A further increase in pressure in the briquetting the mixture, more than 25 MPa, does not effectively enhance the strength of the resulting briquettes; additionally, there is no operational need for additional increase in strength of the briquettes. Briquetting the mixture under a pressure of less than 25 MPa is impractical because the mixture becomes newpathname due to the presence of coke and thermoantracite things with relatively large particle sizes up to 16,0 mm to 6.0 mm, respectively.

Method of producing fuel briquettes is carried out as follows. The crushed solid fuel, which is used as coke breeze with dimensions h is CI 0.05 to 16,0 mm in the amount of 50-80 wt.%, thermoanalytical fines with a particle size of 0.05 to 6.0 mm in the amount of 20-50 wt.%, mixed with a binder, which is used as lignosulfonate in the number of 8-9% by weight of the crushed solid fuel, modified 3-5 wt.% oil or petroleum products. Then make the briquetting mixture under a pressure of 25 MPa by a high-speed press with bilateral compression of the briquette. After that, the briquettes are subjected to heat treatment at a temperature of 200-250°within 1.5-2 hours

Example 1 a specific implementation method of producing fuel briquettes. As the crushed solid fuel used coke breeze with particle sizes of 0.05-16,0 mm in the amount of 50 wt.% and thermoanalytical fines with a particle size of 0.05 to 6.0 mm in the amount of 50 wt.%. As a binder used lignosulfonate in the amount of 8% by weight of the crushed solid fuel, modified 3 wt.% oil. The modification process was carried out by blending in to the lignosulfonate oil. Coke and thermoanalytical a trifle mixed in a paddle mixer for 180 s, and then added binder. Then the crushed solid fuel mixed with a binder with another 300 and unloaded onto the belt conveyor for feeding the mixture for briquetting. The briquetting mixture produced by a high-speed press QMS brand-519 under the pressure of 25 MPa with d is ostoronnim compression. The briquettes were filed on the next conveyor belt and then to the drying furnace, where it was subjected to heat treatment at a temperature of 220° aged 1,5 hours Later briquettes was cooled, and after cooling they were received at the warehouse. Obtained when implementing the described method briquettes had after drying compressive strength of 15 MPa, tensile dropping 92%, the heat resistance of 80%, the lower calorific value 6,700 kcal/kg gross calorific value 7800 kcal/kg

Example 2 specific implementation method of producing fuel briquettes. As the crushed solid fuel used coke breeze with particle sizes of 0.05-16,0 mm in the amount of 65 wt.% and thermoanalytical fines with a particle size of 0.05 to 6.0 mm in the amount of 35 wt.%. As a binder used lignosulfonate in an amount of 9% by weight of the crushed solid fuel, modified 4 wt.% the oil asphalt. The modification process was carried out by blending in to lignosulfonate of oil asphalt. Coke and thermoanalytical a trifle mixed in a paddle mixer for 180 s, and then added binder. Then the crushed solid fuel mixed with a binder with another 300 and unloaded onto the belt conveyor for feeding the mixture for briquetting. Briquetting the mixture produced on the velocity of the MD press QMS brand-519 under the pressure of 25 MPa two-way compression. The briquettes were filed on the next conveyor belt and then to the drying furnace, where it was subjected to heat treatment at a temperature of 220° with a shutter speed of 1.7 hours Later briquettes was cooled, and after cooling they were received at the warehouse. Obtained when implementing the described method briquettes had after drying, the compressive strengths of up to 16 MPa, tensile dropping 98%, the heat resistance of 85%of the lower calorific value 6800 kcal/kg gross calorific value 7,400 kcal/kg

Example 3 specific implementation method of producing fuel briquettes. As the crushed solid fuel used coke breeze with particle sizes of 0.05-16,0 mm in the amount of 80 wt.% and thermoanalytical fines with a particle size of 0.05 to 6.0 mm in the amount of 20 wt.%. As a binder used lignosulfonate in an amount of 9% by weight of the crushed solid fuel, a modified 5 wt.% oil. The modification process was carried out by blending in to the lignosulfonate oil. Coke and thermoanalytical a trifle mixed in a paddle mixer for 180 s, and then added binder. Then the crushed solid fuel mixed with a binder with another 300 and unloaded onto the belt conveyor for feeding the mixture for briquetting. The briquetting mixture produced by a high-speed press mA is key QMS-519 under the pressure of 25 MPa two-way compression. The briquettes were filed on the next conveyor belt and then to the drying furnace, where it was subjected to heat treatment at a temperature of 220° aged 2,0 o'clock the Next fuel briquettes was cooled, and after cooling they were received at the warehouse. Obtained when implementing the described method briquettes had after drying, compressive strength up to 17 MPa, tensile dropping 98%, the heat resistance of 85%of the lower calorific value 6320 kcal/kg gross calorific value 7300 kcal/kg

The proposed method of producing fuel briquettes can reduce energy consumption, capital and operating costs, increase productivity, and improve strength, heat resistance, calorific value and to extend the period of work produced on the basis of fuel briquettes by introducing the crushed solid fuel thermoantracite stuff, which is more ductile material than coke breeze, and so contributing to the mobility of the mixture during its compaction and obtaining dense solid briquettes. In addition, the proposed method allows to reduce the cost of the resulting fuel briquettes compared with the cost of fuel briquettes made on the basis of the prototype method, as the cost per unit weight of anthracite or thermoantracite stuff 3-4 times desil is, what is the cost per unit weight of the coke breeze.

Method of producing fuel briquettes, comprising a mixture of powdered solid fuel on the basis of coke breeze with a binder on the basis of modified lignosulfonate in the number of 8-9% by weight of the crushed solid fuel briquetting mixture and subsequent heat treatment of the briquettes, characterized in that as the crushed solid fuel use coke breeze with particle sizes of 0.05-16,0 mm in the amount of 50-80 wt.%, thermoanalytical fines with a particle size of 0.05 to 6.0 mm in the amount of 20-50 wt.% and use a matrix of lignosulfonate modified 3-5 wt.% oil or oil products, and the briquetting mixture is performed under a pressure of 25 MPa.



 

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FIELD: solid fuel technology.

SUBSTANCE: invention is designed for application in production of solid fuel in metallurgy and for domestic necessities. Method of restoring sieve composition of coke comprises mixing off-grad coke with binder, such as various cement brands and Portland cement, moistening, briquetting of mix followed by heat treatment, and cooling. Off-grad coke utilized is coke fines fraction 0-10 mm and/or coke nut fraction 10-25 mm belonging to a certain types, which are mixed with binder at ratio (60-95):(5-40), respectively. Moistening is provided by adding water to 35% based on the weight of mix. Heat treatment is effected with steam. Cooling proceeds at ambient temperature to residual moisture content 5%. Mix is completed with filler in the form of organic or inorganic naturally occurring or man-made substances. Briquetting is effected on either vibration or press equipment. Coke briquette contains 60 to 95% of above-defined off-grade coke and 5 to 40 % of binder. Size of thus manufactured briquettes corresponds to required sieve composition of coke.

EFFECT: enabled full restoration of all fractions of needless process coke residues to useful sieve composition appropriate for fabrication of environmentally safe briquettes with improved consumer's properties without considerable investments.

8 cl, 1 tbl, 6 ex

FIELD: production of solid carbonaceous fuel.

SUBSTANCE: the invention is pertaining to the method of production of solid fuel briquettes and may be used at enterprises producing a household fuel. The method provides for mixing of slack coal (sludge cake) with the diameter of fragments of 0.05-0 mm with a mass share a moisture of 16-17 % and with 5 % (23-34 %) of water solution of a cationic polyelectrolyte, compaction of a charge mixture by a hydraulic press at the pressure of 340 kg/cm2 and the thermal treatment at the temperature of t=150°C within 30 minutes. The invention allows to reduce pollutants emissions into the aerosphere at incineration of the solid fuel briquettes that reduces the negative effect on the natural environment and also to exclude the usage of an expensive undersized coke.

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3 tbl

The invention relates to the production process fuel for use in mining and roasting processes
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The invention relates to the technology of briquetting coke breeze, coke dust and sludge, in particular the production of coke briquettes

FIELD: briquetting brown coal in regions remote from consumer.

SUBSTANCE: proposed method includes grinding the coal, heat treatment, mixing with binder and molding. Coal is mixed with binder at pyrolysis of coal fines and "chocolate"-shaped plates are molded in between polymer films.

EFFECT: reduced wear of briquettes in transit; reduced consumption of binder.

FIELD: sold fuels.

SUBSTANCE: coal briquette contains 50% and less than at least slime and/or dust and fine coal residues as principal components, said slime and said dust including iron or iron compounds, carbon, calcium and magnesium compounds, as well as 5-20 wt parts of binder per 100 wt parts principal components. Coal briquette manufacture is also described.

EFFECT: increased strength on fall and preserved satisfactory dynamic cracking on heating.

15 cl, 6 tbl, 3 ex

The invention relates to the field of fine processing moisture products enrichment fossil fuels and byproducts coal in domestic fuel briquetting using inorganic binders
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Fuel briquette // 2098460
The invention relates to fuel briquettes, which can be used in a power system and for domestic consumption
The invention relates to the technology of briquetting of coal and coke breeze, in particular the production of coal or coke briquettes

The invention relates to a process for the production of fuel briquettes from fine carbon-containing classes

The invention relates to the preparation of the binder and can be used in coke, petrochemical, chemical industry for the preparation of the binder upon receipt of graphite electrodes, briquettes, coking partially briquetted charge, in road construction in the preparation of asphalt mixes, etc

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FIELD: sold fuels.

SUBSTANCE: coal briquette contains 50% and less than at least slime and/or dust and fine coal residues as principal components, said slime and said dust including iron or iron compounds, carbon, calcium and magnesium compounds, as well as 5-20 wt parts of binder per 100 wt parts principal components. Coal briquette manufacture is also described.

EFFECT: increased strength on fall and preserved satisfactory dynamic cracking on heating.

15 cl, 6 tbl, 3 ex

FIELD: briquetting brown coal in regions remote from consumer.

SUBSTANCE: proposed method includes grinding the coal, heat treatment, mixing with binder and molding. Coal is mixed with binder at pyrolysis of coal fines and "chocolate"-shaped plates are molded in between polymer films.

EFFECT: reduced wear of briquettes in transit; reduced consumption of binder.

FIELD: manufacture of building materials.

SUBSTANCE: invention relates to manufacture of molded fuel, in particular to fabrication of high-carbon fuel briquettes, which can be used when smelting cast iron in cupola-furnaces, when producing calcium carbide, silicon carbide, mineral fibers, and other materials. Process according to invention comprises mixing ground solid fuel with binder in amount 5-9% of the weight of ground solid fuel and briquetting mix followed by heat treatment of briquettes. Ground solid fuel is composed of coke fines with particle size 0.05-16.0 mm, 50-80%, and thermoantracite fines with particle size 0.05-6.0 mm, 20-50%. Binder is lignosulfonates modified with 3-5% of petroleum or petroleum products. Briquetting of mix is effected under pressure 25 MPa.

EFFECT: reduced power consumption, investment and operational expenses, increased briquette fabrication productivity, and increased strength, heat resistance, and calorific value of fuel briquettes.

3 ex

FIELD: ferrous metallurgy, fuels.

SUBSTANCE: invention relates to a composition used in preparing briquetted fuel. The composition used in preparing briquetted fuel comprises the following components, wt.-%: ground anthracite, 45-80; coal of sort GZH, 15-50, and coal resin and/or accumulated waste from coke-chemical industry as a binding agent, 3-7. Invention provides reducing consumption of coke and effective utilization of industrial waste.

EFFECT: improved properties of composition.

1 tbl

FIELD: solid fuel production.

SUBSTANCE: invention relates to coal processing industry, namely to brown coal briquetting technology in order to fabricate agglomerated solid fuel that could be used for community needs as well as in industry. Idea of proposed fuel briquette fabrication process resides in grinding brown coal, measuring it out for mixing with sawdust, and briquetting mixture. Mixture of brown coal having particle size below 2.5 mm and softwood sawdust is prepared without binder. At content of sawdust 17±1%, briquetting temperature 90±5°C, and specific briquetting pressure 50±2 MPa, briquettes showing compression strength at least 7.8 MPa.

EFFECT: increased mechanical strength of briquettes.

1 dwg, 1 tbl

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