CN1648205A

CN1648205A - Coal blending and coking method for metallurgical coke

Info

Publication number: CN1648205A
Application number: CN 200410061462
Authority: CN
Inventors: 郑烈; 袁万能; 薛改凤; 冯进; 李安平; 郝晋; 张前香; 蒋旭东; 许传智
Original assignee: Wuhan Iron and Steel Group Corp
Current assignee: Wuhan Iron and Steel Group Corp
Priority date: 2004-12-30
Filing date: 2004-12-30
Publication date: 2005-08-03
Anticipated expiration: 2024-12-30
Also published as: CN100441662C

Abstract

The present invention relates to coal blending and coking method for metallurgical coke, and especially the coal blending and coking method with thermal coal and weakly caking coal. The present invention adopts conventional coking process and the coal consists of weakly caking coal 0-15 wt%, thermal coal 0-10 wt%, gas coal 13-45 wt%, fatty coal 9-20 wt% and coking coal 40-45 wt%. The produced coke has dropping strength M40 of 77-78.5 %, abrasion resistance strength M10 <8.6 %, reactivity of 35-37 %, thermal state strength of 45-55 %, and granularity of 25-40 mm and 40-80 mm, and meets the requirement for iron smelting in blast furnace of 1000 cubic meter or larger. The present invention has expanded coal variety range for coking, and lowered coking cost.

Description

A kind of coal-blending coking method of metallurgical coke

Technical field

The present invention relates to a kind of method of utilizing steam coal and weakly caking coal to carry out coal-blending coking, particularly the coal-blending coking method of metallurgical coke.

Background technology

Because high-quality caking coal is under-supply, therefore resource-constrained saves high-quality caking coal, enlarges the ratio of non-coking coal in coke making and coal blending, has become the important topic that needs to be resolved hurrily in the current coal-blending coking.There has been method in the prior art with weakly caking coal and Non-caking Coal in Coal Blends for Cokemaking, Chinese patent communique CN1140196A disclosed a kind of " producing the blending method of superior casting coke with weakly caking coal " for example, but the coal that this method is joined is more single, and the coke of producing is that foundry coke and non-blast furnace ironmaking are with burnt.Blast furnace ironmaking is with Jiao that metallurgical coke requires on physical and chemical index higher relatively.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of coal-blending coking method that adopts steam coal and weakly caking coal to carry out metallurgical coking at the deficiency of above-mentioned prior art existence.

The present invention for the technical scheme that problem adopted of the above-mentioned proposition of solution is: adopt conventional coking process method, its difference is that the material component of coke making and coal blending is by weight:

Weakly caking coal 0-15% steam coal 0-10% bottle coal 13-45% rich coal 9-20%

Coking coal 40-45%.

Press such scheme, described steam coal can be brown coal and/or long-flame coal.

Beneficial effect of the present invention is:

1, the quality of metallurgical coke has very significant effects to blast furnace ironmaking process, to the specification of quality of metallurgical coke mainly be that ash is low, sulfur-bearing is few, intensity is good, fugitive constituent is low, moisture stabilization and alkali resistance be good.Its dropping strength of the coke that the present invention produced M ₄₀Reach 77-78.5%, abrasive wear resistance M ₁₀＜8.6%, reactivity reaches 35～37%, hot strength 45～55%, and granularity is 25-40mm, 40-80mm secondary, meets 1000M ³And above blast furnace ironmaking needs with burnt.

2, use the steam coal coal-blending coking, broken traditional coal scope of using, enlarged the coal scope of coking coal, utilize non-coking coal and low grade coal to replace the part coking coal, fully effectively utilized the coal resources of China, reduced the coking cost, prove through commerical test, under Aug. 1st steel mill in Xinjiang has now with the coal condition, replace about 7% coking coal with stone ladder steam coal, use about 30 yuan/ton of coal cost declines.

Embodiment

Embodiments of the invention are as described below:

Adopt conventional coking process method, each coke making and coal blending raw material mixed fed to boiler, the material component of coke making and coal blending by weight, each embodiment is as shown in the table:

Weakly caking coal steam coal bottle coal rich coal coking coal M ₄₀M ₁₀

1)?????15％????????0?????????30％??????10％??????45％??????78.1％??????8.1％

2)?????14.3％??????10％??????23.7％????9.5％?????42.5％????78.7％??????7.9％

3)?????0???????????5％???????40％??????10％??????45％??????78.1％??????7.9％

4)?????0???????????5％???????45％??????10％??????40％??????78.1％??????7.9％

5)?????14.3％??????10％??????13.7％????19.5％????42.5％????78.4％??????8.6％

Requirement to each coal in the above-mentioned raw materials is:

	Reflectivity (%)			Reflectivity distribution (%)
	Reflectivity (%)			Reflectivity distribution (%)				Maximum	Minimum	????Rmax	??＜0.75	????0.75～0.95	????0.95～1.35	??＞1.35
	Weakly caking coal	0.8860	?0.4548	????0.5933	??92	????8	????-	Maximum	Minimum	????Rmax	??＜0.75	????0.75～0.95	????0.95～1.35	??＞1.35	??-
Steam coal	Weakly caking coal	0.8860	?0.4548	????0.5933	??92	????8	????-	0.9823	?0.4193	????0.6240	??77.5	????22.5	????-	??-	??-
Steam coal	Bottle coal	0.7952	?0.4595	????0.5461	??97	????3	????-	0.9823	?0.4193	????0.6240	??77.5	????22.5	????-	??-	??-
Rich coal	Bottle coal	0.7952	?0.4595	????0.5461	??97	????3	????-	1.1855	?0.7379	????0.9972	??2.5	????22.5	????75	??-	??-
Rich coal	Coking coal	1.6703	?0.8845	????1.2401-1.3810	??-	????0-10	????42-70	1.1855	?0.7379	????0.9972	??2.5	????22.5	????75	??-	??30-57

In the table: Rmax is maximum average reflectance.

All coals: Sd (sulfur-bearing)＜1.0; Ad (ashes)＜14.0.

Claims

1, a kind of coal-blending coking method of metallurgical coke adopts conventional coking process method, it is characterized in that the material component of coke making and coal blending is by weight:

Weakly caking coal 0-15% steam coal 0-10% bottle coal 13-45% rich coal 9-20%

Coking coal 40-45%.

2, by the coal-blending coking method of the described metallurgical coke of claim 1, it is characterized in that described steam coal is brown coal and/or long-flame coal.

3, by the coal-blending coking method of the described metallurgical coke of claim 1, it is characterized in that the material component of coke making and coal blending is by weight:

Weakly caking coal 15% steam coal 0 bottle coal 30% rich coal 10% coking coal 45%.

4, by the coal-blending coking method of the described metallurgical coke of claim 1, it is characterized in that the material component of coke making and coal blending is by weight:

Weakly caking coal 14.3% steam coal 10% bottle coal 23.7% rich coal 9.5% coking coal 42.5%.

5, by the coal-blending coking method of the described metallurgical coke of claim 1, it is characterized in that the material component of coke making and coal blending is by weight:

Weakly caking coal 0 steam coal 5% bottle coal 40% rich coal 10% coking coal 45%.

6, by the coal-blending coking method of the described metallurgical coke of claim 1, it is characterized in that the material component of coke making and coal blending is by weight:

Weakly caking coal 0 steam coal 5% bottle coal 45% rich coal 10% coking coal 40%.

7, by the coal-blending coking method of the described metallurgical coke of claim 1, it is characterized in that the material component of coke making and coal blending is by weight:

Weakly caking coal 14.3 steam coals 10% bottle coal 13.7% rich coal 19.5% coking coal 42.5%.