SU1404540A1 - Method of producing carbon brick - Google Patents

Abstract

The invention relates to ferrous metallurgy, specifically to the preparation of mixtures and briquettes, used in the smelting of steel in aggregates with base lining. The purpose of the invention is to increase the strength of the briquette and reduce its cost. The mixture is prepared from 20-30 wt.% Bituminous coal, 10-25 wt.% Coal coal fus and the rest is oiled sludge from rolling mills. The joint introduction of a mixture of coal and fusi in the specified ratio increases the strength of briquettes when tested in compression and impact, reduces it. 1 hp f-ly, 2 tab. with

Description

ABOUT

Q1

four;

The invention relates to ferrous metallurgy, specifically to the preparation and briquettes used in BiaHinasKB steel in 51 units with basic lining.

The purpose of the invention is to increase the strength of the briquette and reduce its cost.

Briquette is prepared with the following content of components, wt.%: Coal 20-30 Coal coal 10-25

Oiled

sludge of rolling stock flushes. The remaining components in the mixture take fractions of less than 3 mm. The coal used in the mixture system is represented by coal grades K and D (15–25% ash). Coal grade K provides normal. structure, uniformity and high strength of the briquette. Coal Marga G, present in the mixture, increases the yield of gas and chemical products of coking, reduces the pressure of the bulge in the briquette during the plastic state of the coal at temperatures close to the formation of semi-coke (when the release of volatile substances reaches a maximum), which ensures the briquette is higher Oily sludge of rolling mill production consists of finely dispersed oxide and ferrous oxide (with a total iron content of 35-60%) of engine oil and soot pyrolysis residues of engine oil (at eat oil content 2 - 10%) present at the following ratio The components, wt%: sooty pyrolysis residues 0.6-0.8 machine oil.

Engine oil 5-8 Iron oxides Else

Carboniferous fus is the ablation of fine coal fractions from coke oven batteries along with coke oven gas. Fus settles on gas flues; in the form of the present mixture of 40-50% of coal dust and otherwise coal tar. This black substance, with a density of more than 1000 kg / m, has good bonding and sintering properties, good flammability and imparts mechanical strength and heat resistance to briquettes.

five

n 5 5

0

50

55

The components of the mixture are mixed in the required ratio when heated to 150-200 ° C, pressed at these temperatures at pressures of 40-100 MPa. Then the obtained briquettes are quickly heated to 400-450 C. The finished briquettes are cooled in air.

Example. The mixture to produce carbon briquette is made up of grades of grades K and D (15-25% ash), oiled sludge of rolling production (with a total iron content of 55-60%, and oil 2-10%) and coal coal mined to less than a fraction. 3 mm. While mixing the components of the mixture, taken in the required ratio, it is heated to 150 - 200 ° C. At the same temperature, the mixture is pressed into briquettes on a hydraulic press with a pressing pressure of 40-100 MPa. Then, the resulting briquettes are quickly heated without air access to 400-450 ° C. The finished briquettes are air cooled to room temperature. Briquettes are also prepared from a mixture of a well-known stock.

The chemical composition of the proposed and known mixtures are given in table.1. Comparative mechanical characteristics of the resulting briquettes lead-. Table 2. The compressive strength is determined by crushing a briquette on a hydraulic press. The strength of the briquettes on impact is determined by the number of drops from the height of the cast-iron plate to the destruction of the briquette.

Briquettes of compositions 1 and 5 have low strength, which leads to their rapid destruction and increases losses. Therefore, with such ratios of the components of the mixture, the goal is not achieved.

Briquettes of compositions 2-4 correspond to the proposed limits on the content of all components and have high strength. At the same time, the use of such a waste of metallurgical production as coal coal reduces the cost of briquettes. .

Claims (2)

1. A mixture for the production of carbon briquette, containing oiled sludge of rolling mills and carbonaceous materials. characterized in that, in order to increase the strength of the briquette and reduce its cost, a mixture of coal and coal coal is used as the carbonaceous material in the following ratio, wt.%: Kamenns coal 20-30 Coals fus10-25 Oiled sludge washes Katnogo production Else 2. Mixture POP.1, characterized in that the coal fus contains, in wt.%: Solid carbon particles40-50 Hard coal resinErest Table 1 Coal 15 20 Oiled sludge rolling mills Coal Fu LigninComponents of ferroalloy blends 25 thirty 35 57.5 45 32.5 20 ten 17.5 25 32.5 35 Rest Table 2