Method to produce briquette fuel

FIELD: power engineering.

SUBSTANCE: method to produce briquette fuel includes stages for preparation of initial components, mixing, pressing and drying. Components used are a carbon-containing material, such brown coal medium-temperature coke of the initial grain-size composition, a mineral binder, such as subcoal aleurolite, a strengthening modifier, such a 3% aqueous solution of a polyvinyl alcohol (PVA) or an aqueous solution of 10% flour paste, a hydrophobe modifier, such as fuel oil of M100 grade and water, at the following ratio of components, wt %: mineral binder - 1-10; strengthening modifier - 1-30; hydrophobe modifier - 1-10; water - 1-30; carbon-containing material - balance. After mixing of components the briquette mass is pressed into briquettes under pressure of 20-200 MPa, and then briquettes are dried at the temperature 100-250°C.

EFFECT: method improvement.

4 cl, 15 ex

 

The invention relates to the field of technology of preparation and production of briquettes used as the reducing agent in metallurgical processes, as well as smokeless fuel for domestic and industrial furnaces.

There is a method of producing fuel briquettes patent No. 2130047, CL C10L 5/02 from 06.04.1998, the Method includes mixing the crushed solid fuel with a binder on the basis of waste oil production - oil sludge and/or waste engine oil, briquetting the mixture and subsequent drying. Additionally, a binder is injected components selected from the group including % by weight of briquetted mixture: lignosulfonate or molasses 2-7%, and/or dehydrated activated sludge 3-8%, and/or clay 3-10%, and/or paraffin or paraffin GAC 1-6%, with the following ratio of components in the briquette, wt.%: binder 10-23, crushed solid fuel selected from the group of: sawdust, peat moss, dehydrated poultry manure, dehydrated manure, coke or coal, coal slurry, lignin, or a mixture thereof up to 100. Briquetting is carried out at a pressure of 1-30 MPa and drying of the briquettes at a temperature less than 300°C. the Components of the binder before mixing with the solid fuel mix. The components of the binder before mixing heated to 60-80°C or stirred, heated to 60-80°C. the Solid fuel will precede the flax mixed with half of the sludge or treated engine oil and then add the remaining components of the binder.

However, the briquettes obtained by a known method, do not have sufficient strength due to the inclusion of raw materials, for example, sawdust, manure, bird droppings.

Known coal briquette with enhanced durability, and a method of its manufacture (EN 2224007, CL C10L 5/02 from 12.12.2001,). Briquette with initial resistance and consisting of 100 parts of fine coal, 1-5 parts of quicklime and 7-15 parts molasses. The briquette has a resistance of kalimati not less than 70% and the intensity of dust not more than 20% and is suitable for use in the smelting-reduction process of obtaining iron. In briquette quicklime contains particles of sizes not greater than 1 mm, and the percentage of particle sizes not more than 0.3 mm is not less than 50% by weight. A method of manufacturing such briquettes includes operations: mixing 1-5 parts of quicklime with 100 parts of coal dust and keeping the mixture; mixing 7-15 parts molasses with a seasoned mixture and mixing and direct formation of mixed mixture to obtain briquettes. The way in which quicklime contains particles of sizes not greater than 1 mm, and the percentage of particle sizes not more than 0.3 mm is not less than 50% by weight. The way in which ageing from 2 min to 2 h for the conversion of quicklime into hydrated. The way in which mixing of Westlaw within 2-50 min to increase the speed of solidification. The way in which after the direct formation is not carried out operations of heating and drying.

The disadvantage of this invention is the fact that to achieve the high-strength binder is used, the ability of saharat calcium resulting from the chemical reaction between the lime and molasses. However, the chemical reaction between lime and molasses is limited to short residence time in the system. Quicklime reacts rapidly with moisture and with molasses, contributes to the hardening ingredients, which prevents uniform distribution of lime in the mixture, it reduces the mechanical strength and makes storage and transport.

The invention solves the problem of producing briquettes high resistance and durability.

The technical result when using the invention consists in the possibility of multiple loading-unloading operations with the briquettes with resistance.

This technical result is achieved in that a method of obtaining a briquette fuel, including preparation of initial components, mixing, pressing and drying, includes as components the use of carbon-containing material, mineral binders, hardening modifier, water-repellent modi is icator and water in the following ratio of components, wt.%: mineral binder 1-10; strengthening modifier 1-30; gidrofobiziruyuschey modifier 1-10; water 1-30; carbon-containing material - the rest. For the preparation of components of carbonaceous material and mineral binders together crushed to particle size distribution with a maximum particle size of not more than 5 mm At the stage of mixing to the powdered carbonaceous material and mineral binders add water and a hydrophobic modifier, and then the resulting mass is stirred with the addition of hardening modifier. After mixing of the components of the machine mass is pressed into briquettes under the pressure of 20-200 MPa, and then the pellets are dried at a temperature of 100-250°C.

To obtain briquettes as a carbonaceous material is used, for example, lignite medium temperature coke initial particle size distribution, as mineral binders used siltstone, as a water-repellent modifier - oil brand M100, as a hardening modifier - 3%aqueous solution of polyvinyl alcohol (PVA) or an aqueous solution of 10%flour paste.

Grinding coke and siltstone is carried out by grinding in a ball mill until the residue on a sieve of 0.2 mm, not more than 10%. For the preparation of a hardening modifier polyvinyl alcohol solution which is in hot water for a water bath at a temperature of 90°C in a ratio of 3 parts PVA in 100 parts of water, similarly prepared solution of flour paste in a ratio of 10 parts of flour per 100 parts of water. For better mixing is used propeller stirrer vertical type.

Preparation of press powder is as follows. When grinding in a ball mill to coke and siltstone added water and a hydrophobic modifier, when grinding the mixture stirred until homogeneous. After discharge of the mixture from the mill and move it to the mixer thereto is added water, and then hardening the modifier. The resulting mixture was intensively stirred to obtain a homogeneous composition.

Received press powder is pressed under pressure, for example 125 MPa. The briquettes are dried at a temperature of, for example, 160°C. to a moisture content of about 8%. Hot briquettes are cooled at ambient temperature.

Example 1. Use the following components: 100 parts of lignite medium temperature coke as the carbonaceous material, 8 parts of siltstone podpolnogo as a binder, 3 parts of oil brand M100 as a water-repellent modifier, 10 parts of 3%aqueous solution of polyvinyl alcohol (PVA) as a hardening modifier and a total of 20 parts of water.

The original components were prepared as follows. The medium is temperatury coke together with siltstone were crushed in a ball mill with the addition of water (10 parts) and fuel oil to the remainder of the granular mixture on a sieve of 200 μm is not more than 10%. Then with vigorous stirring of the mass in the mixer was added to the remaining water, and then a solution of PVA. Mixed until smooth briquetting the mixture is extruded at a pressure of 125 MPa. The briquettes were dried at a temperature of 160°C. to a moisture content of 8%. Hot briquettes to cool at ambient temperature.

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 9.1 MPa, water resistance (briquettes are stored not less than 95% strength after soaking in water for 2 hours), the absorption of 5.5% and a porosity of 44%, not pyrophoric and are not prone to spontaneous combustion.

Example 2. The manufacture of briquettes from lignite medium temperature coke of example 1, but as a water-repellent properties of the modifier used water-in-oil brand M100 (the moisture content of 14.2%) in an amount of 4 parts, as a hardening modifier instead of 3%aqueous solution of PVA is used 10%flour paste in the same amount (10 parts)and water take only 10 parts, with all the water added before the mixture of fuel oil.

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 7.4 MPa, water resistance (briquettes retain 100% strength after soaking in water for 2 hours), the absorption of 4.9% and a porosity of 43.2%, not the pyro is Orna and not prone to spontaneous combustion.

Example 3. The manufacture of briquettes from lignite medium temperature coke of example 1, but as a hardening modifier, a mixture of 15 parts of 10%aqueous flour paste and 3.3 parts of 3%aqueous solution of PVA and water take only 5 parts, with all the water added before the mixture of fuel oil.

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 11.3 MPa, water resistance (briquettes retain 89.4% of strength after soaking in water for 2 hours), the absorption of 4.8% and a porosity of 44.9%, not pyrophoric and are not prone to spontaneous combustion.

Example 4. The manufacture of briquettes from lignite medium temperature coke of example 1, but take 20 parts of 3%aqueous solution of polyvinyl alcohol (PVA) as a hardening modifier and a total of 10 parts water.

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 11.2 MPa, water resistance (briquettes retain 95% strength after soaking in water for 2 hours), the absorption of 8.3% and the porosity is 43.8%, not pyrophoric and are not prone to spontaneous combustion.

Example 5. The manufacture of briquettes from lignite medium temperature coke of example 1, but take 5 parts of 3%aqueous solution of polyvinyl alcohol (PVA) as a hardening mo is idicator and a total of 20 parts water.

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 4.3 MPa, water resistance (briquettes retain 67% strength after soaking in water for 2 hours), the absorption of 15.3% and a porosity 44,4%, not pyrophoric and are not prone to spontaneous combustion.

Example 6. The manufacture of briquettes from lignite medium temperature coke of example 1, but take 15 parts of 3%aqueous solution of polyvinyl alcohol (PVA) as a hardening modifier and a total of 10 parts water.

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 9.5 MPa, water resistance (briquettes retain 82.5% of strength after soaking in water for 2 hours), the absorption of 8.7% and a porosity of 44.2%, not pyrophoric and are not prone to spontaneous combustion.

Example 7. The manufacture of briquettes from lignite medium temperature coke in example 2, but take 30 parts of 10%aqueous flour paste, and water take only 10 parts

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 12 MPa, water resistance (briquettes retain 95% strength after soaking in water for 2 hours), the absorption of 18.8% and a porosity of 43.6%, and are not pyrophoric and are not prone to spontaneous combustion.

Example 8. Manufacturer of Britto is of medium temperature coke lignite according to example 2, but take 20 parts of 10%aqueous flour paste, and water take only 10 parts

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 9.8 MPa, water resistance (briquettes retain 91.8% of strength after soaking in water for 2 hours), the absorption of 6.9% and a porosity 44,4%, not pyrophoric and are not prone to spontaneous combustion.

Example 9. The manufacture of briquettes from lignite medium temperature coke in example 2, but take 5 parts of 10%aqueous flour paste, and water take only 10 parts

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 5.2 MPa, water resistance (briquettes retain 75% strength after soaking in water for 2 hours), the absorption of 7.3% and a porosity 44,4%, not pyrophoric and are not prone to spontaneous combustion.

Example 10. The manufacture of briquettes from lignite medium temperature coke of example 1, but as a water-repellent properties of the modifier used oil brand M100 in the amount of 1 parts

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 7.8 MPa, water resistance (briquettes retain 87% strength after soaking in water for 2 hours), the absorption of 6.8% and a porosity of 45.6%, not pyrophoric and are not prone to spontaneous combustion.

Example 11. Technology is the manufacture of briquettes from lignite medium temperature coke of example 1, but as water-repellent properties of the modifier used oil brand M100 4 parts

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 7.2 MPa, water resistance (briquettes retain 95% strength after soaking in water for 2 hours), the absorption of 4.0% and a porosity of 44.1%, not pyrophoric and are not prone to spontaneous combustion.

Example 12. The manufacture of briquettes from lignite medium temperature coke in example 2, but as a water-repellent properties of the modifier used oil brand M100 in the amount of 1 parts

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 7.9 MPa, water resistance (briquettes retain 91% strength after soaking in water for 2 h), absorption 8.9% and porosity 44,4%, not pyrophoric and are not prone to spontaneous combustion.

Example 13. The manufacture of briquettes from lignite medium temperature coke in example 2, but as a water-repellent properties of the modifier used oil brand M100 in the amount of 3 parts

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 8.9 MPa, water resistance (briquettes retain 85,4% strength after soaking in water for 2 hours), the absorption of 6.9% and a porosity 44,4%, not piropo who are not prone to spontaneous combustion.

Example 14. The manufacture of briquettes from lignite medium temperature coke of example 1, but take 1 parts of siltstone podpolnogo as a binder.

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 8.1 MPa, water resistance (briquettes retain 83,9% strength after soaking in water for 2 hours), the absorption of 12.9% and a porosity 44,4%, not pyrophoric and are not prone to spontaneous combustion.

Example 15. The manufacture of briquettes from lignite medium temperature coke of example 1, but take 10 parts of siltstone podpolnogo as a binder.

Obtained in this way briquettes from lignite medium temperature coke have a compressive strength of 9.5 MPa, water resistance (briquettes retain 68,5% strength after soaking in water for 2 hours), the absorption of 22.8% and a porosity of 42.5%, not pyrophoric and are not prone to spontaneous combustion.

1. The method of obtaining briquette fuel, including preparation of initial components, mixing, pressing and drying, characterized in that as component use of carbonaceous material such as coal medium temperature coke initial particle size distribution, mineral binder, such as siltstone Podgorny, reinforcing modifier, such as a 3%aqueous shall actor polyvinyl alcohol (PVA) or an aqueous solution of 10%flour paste, hydrophobic modifier, such as oil brand M100, and water in the following ratio, wt.%:

Mineral binder1-10
Reinforcing modifier1-30
Hydrophobic modifier1-10
Water1-30
Carbonaceous materialRest

2. The method according to claim 1, characterized in that at the stage of preparation of the initial components of carbonaceous material and mineral binder together crushed to particle size distribution with a maximum particle size of not more than 5 mm.

3. The method according to claim 1, characterized in that at the stage of mixing to the powdered carbonaceous material and mineral binders add water and a hydrophobic modifier, and then the resulting mass is stirred with the addition of hardening modifier.

4. The method according to claim 1, characterized in that after mixing of the components of the machine mass is pressed into briquettes under the pressure of 20-200 MPa, and then the pellets are dried at a temperature of 200-250°C.



 

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