High-proportion coal blending and coking method

A coal blending coking, high proportion technology, applied in the field of coking, can solve the problems of high cost of coal blending, cost increase, resource shortage, etc., to achieve the effect of improving the competitiveness of enterprises, increasing economic benefits, and expanding the source of coking coal

Active Publication Date: 2011-01-12
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional coal blending coking method has many disadvantages, such as: resource shortage, high-quality coking coal resource shortage makes this method lack of continuous and stable coal blending ratio; coal blending cost is high, this method uses a large amount of high-quality coking coal, and the cost in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1-top loading coking process:

[0018] A kind of high-ratio coal blending coking method of the present embodiment selects the coking coal blending coal types to include gas coal, fat coal, coking coal, lean coal and 1 / 3 coking coal, and the described coking method comprises the following steps: A, raw material Coal is pulverized separately, the pulverized particle size is less than 3mm, and the coal with a particle size below 2mm accounts for more than 60%; the coal with a particle size below 2mm in this embodiment accounts for 65%; B. Coking the raw material coal obtained in step A with basic blended coal, wherein, The base blend coal coal quality anhydrous ash-free base volatile matter V daf =26.0~30.0%, the average maximum reflectance of vitrinite group MMR=1.0~1.1%, ash content A d t，d 74, the maximum thickness of the gelatinous layer>18mm, and the active-inert ratio is 1.7-1.8. This embodiment is a top-loading coking process, and the base is mixed with...

Embodiment 3

[0023] Example 3 - Top loading coking process with additives

[0024] When 37% of coking coal, 25% of fat coal, 8% of additives, 10% of lean coal and 20% of Shenhua coal are mixed in, the quality of coke obtained is very good, reaching the national first-class metallurgical coke standard, that is, coke Crushing strength M40≥80%, abrasion resistance M10≤7.5%, thermal reactivity CRI≤30%, post-reaction strength CSR≥55%.

Embodiment 4

[0025] Example 4 - Stamping coking process with additives

[0026] When 40% of coking coal, 27% of fat coal, 8% of additives, and 25% of Shenhua coal are mixed, the coke obtained is of good quality and reaches the national first-class metallurgical coke standard, that is, the crushing strength of coke M40≥80% , Wear resistance M10≤7.5%, thermal reactivity CRI≤30%, post-reaction strength CSR≥55%.

[0027] The additives of the present invention include: coal tar pitch, coal tar, coke powder, petroleum coke, anthracite, etc., or a mixture of any combination thereof.

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Abstract

The invention relates to a high-proportion coal blending and coking method, wherein the coal blending varieties for coking used in the method comprises gas coal, fat coal, coking coal, lean coal and one third of coking coal. The coking method comprises the following steps: A. crushing raw coals separately, wherein crushed particle grade is less than 3mm, and the coal with particle size being lessthan 2mm accounts for more than 60% of the raw coal; and B. carrying out basic coal blending coking on the raw coals obtained in step A, wherein anhydrous ash-free basis volatile matter (Vdaf) of thebasic coal blending quality is 26.0-30.0%, the averagely maximum reflectance (MMR) of vitrinite is 1.0-1.1%, ash content (Ad) is less than 10.1%, total sulfur (St, d) is less than 1.1%, caking index (G) is more than 74, maximum thickness of a gelatine layer is more than 18mm and ratio between active components and inert components is 1.7-1.8. The coal blending coking method of the invention can enlarge coking coal source, lower ash content, sulfur content and phosphorus content in coke, reduce production cost of enterprises, increase economic benefit, improve competitiveness of enterprises, and achieve good comprehensive benefit.

Description

technical field [0001] The invention relates to a coking method, in particular to a high-ratio coal blending coking method. Background technique [0002] Coking is a traditional industry. As early as the middle of the 18th century, due to the progress of the industrial revolution, the demand for coke for ironmaking in Britain increased significantly, and coke ovens came into being. In 1763, a honeycomb coking oven that uses coal for coking was developed. It is a circular arched cavity made of refractory bricks, and the top and side walls are respectively opened with coal and air inlets. In 1925, China built the first coking plant in Shijiazhuang, which met the coking needs of Hanyeping Iron Works. In the next hundred years, China's coke oven coking chamber has developed rapidly from low to high, from top loading to tamping. At present, my country has the world's highest 7.63m top loading coke oven and 6.25m tamping coke oven, coke Production accounts for more than 60% of th...

Claims

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Application Information

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IPC IPC(8): C10B57/04C10B53/04
Inventor 华泽桥曲思建顾小愚王利斌谷红伟商铁成华夏邢秀云韩志平
Owner CHINA SHENHUA ENERGY CO LTD
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