阅读说明：本技术 一种利用氧化煤的炼焦配煤方法 (Coking and coal blending method using oxidized coal ) 是由 付利俊 谢晓霞 李春燕 卢建文 赵永红 于 2020-01-09 设计创作，主要内容包括：本发明公开了一种利用氧化煤的炼焦配煤方法,该炼焦配煤方法采用以下以质量百分比计的配煤比：焦煤为50％～60％、肥煤为16％～22％、1/3焦煤15％～20％、瘦煤为3％～5％、氧化煤为3％～5％。不仅改善了焦炭质量,获得的焦炭的M<Sub>40</Sub>均大于90％,M<Sub>10</Sub>达到6％以下,CSR均在65％以上,并且可以有效降低国内企业用煤成本。(The invention discloses a coking and coal blending method by using oxidized coal, which adopts the following coal blending ratio by mass percent: 50-60% of coking coal, 16-22% of fat coal, 15-20% of 1/3 coking coal, 3-5% of lean coal and 3-5% of oxidized coal. Not only improves the coke quality, but also obtains M of the coke 40 Are all greater than 90%, M 10 The coal consumption reaches below 6 percent, the CSR is above 65 percent, and the coal consumption cost of domestic enterprises can be effectively reduced.)

1. A coking and coal blending method by using oxidized coal is characterized in that the coking and coal blending method adopts the following coal blending ratio in percentage by mass: 50-60% of coking coal, 16-22% of fat coal, 15-20% of 1/3 coking coal, 3-5% of lean coal and 3-5% of oxidized coal.

2. The coking and coal blending method according to claim 1, characterized in that the fineness of the coking coal, the fat coal, the 1/3 coking coal and the lean coal reach 80 plus or minus 1% (-200 mesh), and the fineness of the oxidized coal reaches 80% -85% (-200 mesh).

Technical Field

The invention belongs to the field of coal blending and coking, and particularly relates to a coking and coal blending method by using oxidized coal.

Background

The oxidized coal mainly refers to coal formed by oxidizing coal seams, the oxidizing action is controlled by factors such as coal coalification degree, burying conditions, erosion action, climate and the like, the coal existing on the surface and underground shallow layers is eroded by natural phenomena such as solarization, rain and wind erosion, water, frost, snow and the like for a long time, and certain inherent physical and chemical properties of the coal are changed greatly, so that the properties of the coal are developed towards the direction which is not beneficial to industrial production, and even the industrial value is completely lost. In addition, the more severe the coal is oxidized, the higher the humic acid content is generally. The oxidized coal has loose structure, is dark black in a wet state, is brownish black after being air-dried, and is always provided with grey-white strips. The color change is often caused by iron hydroxide contamination and oxidation of minerals such as iron alunite and calcite contained in the coal. The coal for coking has changed properties after being oxidized, and the commercial value is reduced.

The Qinghai wood coal field is located in a Datong river upstream basin at the junction of autonomous states of Tibetan and Tibetan of Hai-Ximengmu, consists of a river storehouse area, a focus more area, a Yashan area and a Sudoshu Gong Ma area, is about 450 kilometers from Xining city of province, and is a unique coking coal resource whole-package exploration area of Qinghai province. The existing resource reserves of 35.4 hundred million tons in the total planning range of the mining area are the largest coal mining areas in Qinghai province. Because the green sea wood is a coal mined in the open air from a frozen soil layer, the clean coal has low hardness, is in a coal slurry shape after being unfrozen, the gangue is easy to argillize, and the clean coal is easy to oxidize. Therefore, the application method of the oxidized coal in coal blending coking needs to be studied, and the value of the oxidized coal is fully exerted.

Disclosure of Invention

In view of one or more of the problems in the prior art, the present invention provides a coking and coal blending method using oxidized coal, which employs the following coal blending ratio in mass percent: 50-60% of coking coal, 16-22% of fat coal, 15-20% of 1/3 coking coal, 3-5% of lean coal and 3-5% of oxidized coal.

The fineness of the coking coal, the fat coal, the 1/3 coking coal and the lean coal reaches 80 +/-1 percent (-200 meshes), and the fineness of the oxidized coal reaches 80-85 percent (-200 meshes).

The coking and coal blending method utilizing the oxidized coal based on the technical scheme utilizes reasonable coal blending ratio and fineness composition, can overcome adverse factors of production caused by reduction of various performances of the oxidized coal, has commercial use value, saves high-quality coal for coking, reduces the cost of the coal for coking, and improves the quality of coke. Meanwhile, the method is suitable for the application of the oxidized coal in coal blending coking, and has the advantages of simple process, strong operability, good economic benefit and wide popularization and application prospect.

Drawings

FIG. 1 is a lithofacies map of oxidized coal.

Detailed Description

In order to effectively utilize the oxidized coal for coking and coal blending of domestic enterprises, the invention firstly carries out small coke oven test analysis on the oxidized coal, including industrial analysis, caking property, Kirschner fluidity, Australian expansion degree, coal rock analysis and various performance analyses of coke. Then according to the properties of the oxidized coal, different coal blending ratios are determined, so that a reasonable coal blending ratio is determined.

The present invention will be described in detail with reference to specific examples.