SU1736993A1 - Charge for producing metallurgical coke - Google Patents

Abstract

The invention relates to the preparation of charge materials in the manufacture of metallurgical coke and makes it possible to increase mechanical strength. The mixture having the following ratio of components, wt.%: Maslokalina-containing sludge 1-2; gas coals 15-25; fat coals 25-35; coke coals 30-38; lean coals are coking. The resulting coke has high mechanical properties - an indicator of M25 at the level of 85.6-85.9% and a indicator of mu at the level of 11.8-11.9%. 3 tab.

Description

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with

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

Charges for coke production are known, including gas, fat, lean-sintering coals and iron-containing sludges from aniline production or oil-based sludge from rolling production in an amount of 3-7%.

However, with the introduction of iron-containing sludge from aniline production or oil-calcine-containing sludge of rolling production in an amount of 3-7%, the mechanical properties of coke deteriorate.

In the known charge, the data on the mechanical strength of coke is given. From the charge with the addition of oil-calcine-containing sludge in the amount of 3.5 and 7%, but there is no data on the mechanical strength of coke from

the charge without the addition of oil-containing sludge. The absence of such data does not allow us to state definitely how much the mechanical strength of coke from the charge has decreased with the addition of 3-7% of sludge from rolling production.

Experiments show that adding to the mixture of oil-calcine-containing sludge of rolling production in the amount of 4% reduces Mas by 2.3, and increases MU by 1.4.

The preparation of the known mixture with the following ratio of components in the mixture, wt.%:

Gas coals30-45

Fatty coals20-34

Coke ovens10-20

Sintering Coals8-23

hl

with

ON Yu Yu W

Masloocalin

containing sludge3-7

produced as follows.

Pre-mix a mixture of part of the coal included in the mixture, and oil-containing sludge in a ratio of 5: 1, respectively, in a continuous mixer. After thoroughly mixing, the pre-prepared mixture, including the oil locale-containing sludge and part of the coal, is added to the remaining amount of coal included in the composition and the known mixture and mixed.

However, the charge preparation scheme is complex (double dosing) and requires special equipment (continuous mixer),

The aim of the invention is to increase the mechanical strength of coke, obtained from the mixture using oil-containing sludge of rolling production, and to simplify the scheme of preparing the mixture for coking.

The goal is achieved by using the mixture to produce metallurgical coke, including gas, fatty coke oil-h-baking agent and oil-containing sludge of rolling production in the following ratio of components in the mixture, wt.%:

Oily containing

slimes1-2

Gas coals15-25

Fatty coals25-35

Coke ovens30-38

Scalded coal

In this case, the preliminary mixing of scale-containing sludge with coal, the content of which in the charge does not exceed 20%, is produced in a ratio of 1: 9, respectively, in the warehouse (in the stack or in the tank).

Oil-containing sludge is supplied in uniform portions to the lean-sintering coal (its content in the charge is less than 20%) in the warehouse, and the sludge is distributed over the entire horizontal surface of the coal.

The resulting mixture of lean sintering coal with sludge is metered, like the other coals, into a mixture, which is crushed and mixed in a hammer mill and sent to coking.

Rolled mill grades are a viscous complex mixture in which the content / orso a fc C.1 jfinoY -. i - RGRL2YARU

(68-75) wt.%; oils (15-25) wt.% and water (7-10) wt.%.

Experimental studies of the proposed mixture using masaline-containing sludges are carried out as follows.

Oil-containing sludge is premixed with lean-sintering coal in a ratio of 1: 9. Part

oil scin-containing sludge contains 75.0% of iron oxides, 16.0% of oils and 9.0% of water. This mixture is then metered into the remaining coal and the resulting mixture is crushed and simultaneously stirred in a hammer.

crusher.

The mixture is coked in an experimental coke oven with a single load of 200 kg of the mixture. The masonry material is fireclay, the temperature along the axis of the first cake before delivery is 1050 ° C.

Table 1 shows the compositions of the experimental

samples of the test mixture.

Table 2 presents the characteristics of the test charge.

Table 3 shows the characteristics of the finished

coke, obtained and-} experienced samples of the test mixture, prepared according to a simplified scheme.

No. tab. It follows that 1 i.j is becoming a charge suitable for coking, and

The mechanical strength of coke from charge with the addition of 1-2% of oil-alkaline sludge does not decrease compared with coke from the charge without an additive and satisfies the requirement of the blast furnace process to the mechanical strength of coke. At the same time, a rather significant decrease in the mechanical strength of the coke from the mixture with the addition of 4% oil-alkalin-containing sludge is observed.

The positive effect of the proposed composition of the mixture prepared according to a simplified scheme, in comparison with the known one, is that a lower content of oil-containing sludge in the mixture (12%) improves the mechanical properties of coke and does not require special equipment for mixing the mixture.

Claims (1)

Claims for obtaining metallurgical coke, including gas, fat, coke, lean-sintering coal and Oil-containing sludge of rolling production, characterized in that, in order to increase the mechanical strength of coke, the charge has the following ratio of components, wt.%: Oil-containing sludge1 -2 gas coals 15-25 Fatty coals Coke coals 30-38 25-35 T a b p and y „, ..„ „. The content of components, mls4%, in the charge illlllllllZEIIIIIIiO iiliiliilZ Components Detached coals Rest. Table 3