RU2333236C1 - Charge for production of furnace coke - Google Patents

Abstract

FIELD: petroleum industry.

SUBSTANCE: invention relates to preparation of charge materials and can be used for production of furnace coke. Charge for production of furnace coke containing fat, lean sinter, gas fat, coke sinter coals and sintering additive is characterised that coke production wastes plasticizer is used as a sintering additive, the ratio of the components being as follows (% by weight): Fat coals 14-46; Lean sinter coals 19-57; Gas fat coals 3-34; Coke sinter coals 1-31; Coke lean coals 0-10; Plasticiser 0.5-7; the plasticiser comprises the following components: Coal tar 5-15; Sour tar-15; Coal tar wastes 35-45; Polymers 25-35; Emulsifier 2-7; Additives 3-8.

EFFECT: increased mechanical strength of coke, cost reduction of coke, effective utilisation of production wastes.

2 cl

Description

The invention relates to the preparation of charge materials and can be used in the production of metallurgical coke.

Known as a prototype charge for the production of metallurgical coke [1], containing fatty, lean-sintering coals and a sintering additive, which additionally contains gas-fatty, coke low-sintering coals, and the sintering additive is obtained by mixing a pitch-like product with plastic waste in a ratio of 1 : 0.1-0.2, heating the mixture to 300-350 ° C for 0.5-1.0 hours in the following ratio of components, wt.%:

Gas Fat Coals 15-20 Fat Coals 20-30 Low coking coals 20-40 Sintering additive 3-6 Sintered coals rest

Significant disadvantages of this mixture to obtain metallurgical coke are:

- the high cost of metallurgical coke due to the need to introduce into the composition of the sintering additive in the form of a pitch product and additional heating of the mixture to a temperature of 300-350 ° C;

- reduced mechanical strength of coke in connection with the use of a large number of lean sintering coals;

- inefficient disposal of the resulting waste of coke production.

There is also known a mixture for producing metallurgical coke [2], including gas, fatty, coke, lean sintering coals and oil-sinter slurries of rolling production, which in order to increase the mechanical strength of coke has the following ratio of components, wt.%:

Oil-scaled sludge from rolling mill 1-2 Gas coals 15-25 Fat Coals 25-35 Coke Coals 30-38 Sintered coals rest

Significant disadvantages of this mixture to obtain metallurgical coke are:

- increased ash content and reduced mechanical strength of coke in connection with the introduction into the mixture of oil-sludge-containing sludge rolling mill;

- the lack of the possibility of using wastes of coke production in the charge.

There is also known a mixture for producing metallurgical coke [3], including gas, fatty, coke, lean sintering coals and iron-containing sintering additives, in which, in order to increase the mechanical strength of coke, the remains of the heat treatment process of sulphurous tar in the presence of iron ore concentrate with a softening temperature of 80-100 ° C and a boiling point above 530 ° C in the following ratio of components in the mixture, wt.%:

Sintering additive 2-4 Gas coals 45-55 Fat Coals 17-25 Coke Coals 10-15 Sintered coals rest

Significant disadvantages of this mixture to obtain metallurgical coke are:

- inefficiency of sintering additives, contributing to the high sulfur content in coke due to the use of sulfur tars, and leading to a decrease in the quality of cast iron in blast furnaces, the use of this charge in the production of coke;

- a decrease in the total carbon content of coke due to the need to introduce iron ore concentrate into the sintering additive.

The desired technical results of the invention are:

- increase the mechanical strength of coke;

- reduction in the cost of coke;

- efficient disposal of industrial waste.

For this purpose, a charge for producing metallurgical coke is proposed, containing fatty, lean sintering, gas-fat, coke sintering coals and a sintering additive, characterized in that as a sintering additive, a plasticizer of wastes of coke production is used in the following ratio of components, wt.%:

Fat Coals 14-46 Sintered coals 19-57 Gas Fat Coals 3-34 Coking Sintering Coals 1-31 Coke lean coals 0-10 Plasticizer 0.5-7,

moreover, the plasticizer consists of the following components:

Coal tar 5-15 Sour tar 5-15 Fusy 35-45 Polymers 25-35 Emulsifier 2-7 Additives 3-8

The claimed limits are selected experimentally.

Fatty coals are introduced into the mixture to obtain metallurgical coke as the main component that regulates its strength, and when using less than 14%, the mechanical strength of coke decreases sharply, and with an increase of more than 46%, the inverse effect of the loss of mechanical strength due to the presence of large internal stresses a piece of coke.

Hardened sintering coals are introduced into the composition of the charge as the main sintering component, and when using less than 19%, coke cake spontaneously breaks down, and with an increase of more than 57%, the yield of volatile substances from the charge sharply decreases, which in turn also leads to a loss of its mechanical strength .

Gas-fat coals are introduced into the composition of the charge as the main component for the formation of the effect of coke porosity, and when using less than 3%, it is not possible to obtain the required coke porosity, and with an increase of more than 34%, the large presence of volatile substances leads to an increase in crack formation of coke.

Coking sintering coals are introduced into the composition of the charge to increase the sintering ability of the charge, and when using less than 1%, it is not possible to obtain the required strength of coke, using more than 31% increases the cost of producing coke.

Coke lean coals are introduced into the composition of the charge to reduce its cost, and when using more than 10% there is a decrease in the quality of coke produced.

A plasticizer, which is a mixture of by-product of coke production, is introduced into the mixture to reduce its cost, and when using less than 0.5%, the effect of recycling production waste is negligible, and with an increase of more than 7% there is a sharp decrease in the quality of coke.

The mixture for producing metallurgical coke, after preliminary processing, was used on two coke oven batteries having 55 coking chambers with a useful volume of each chamber of 21.6 m ³ .

The inventive charge for producing metallurgical coke made it possible to efficiently utilize production wastes, while the mechanical strength of coke was increased with an increase in M25 by 0.4% and a decrease in M10 by 0.2%, and the cost was reduced by 3.8 rubles / ton of coke.

Information sources

1. RF patent No. 2224782, cl. СВВ 57/04.

2. AS of the USSR No. 1736993, class СВВ 57/04.

3. AS of the USSR No. 1703674, cl. СВВ 57/04.

Claims (1)

The mixture for producing metallurgical coke containing fatty, lean sintering, gas-fatty, coke sintering coals and a sintering additive, characterized in that as a sintering additive, a plasticizer of coke-chemical production wastes is used in the following ratio of components, wt.%: Fat Coals 14-46 Sintered coals 19-57 Gas Fat Coals 3-34 Coking Sintering Coals 1-31 Coke lean coals 0-10 Plasticizer 0.5-7, moreover, the plasticizer consists of the following components: Coal tar 5-15 Sour tar 5-15 Fusy 35-45 Polymers 25-35 Emulsifier 2-7 Additives 3-8