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Method for optimizing poor coal for blast furnace injection

A processing method and technology for lean and lean coal, applied in the field of deep processing, can solve problems such as data gaps, and achieve the effects of promoting development, saving ironmaking costs, huge social and economic benefits

Inactive Publication Date: 2005-10-12
SHANXI LUAN ENVIRONMENTAL ENERGY DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the systematic research work on the injection performance of lean coal and lean coal, especially the data of blast furnace injection system in terms of injection performance, oxygen-enriched combustion performance, conveying performance, and injection particle size are almost blank status

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] 1. Coal source: select lean coal produced by Shanxi Lu'an Mining Group

[0018] fixed carbon

(%)

low calorific value

(MJ / kg)

Volatile matter

(%)

Explosive

(mm)

Ash

(%)

Sulfur (%)

Grindability

Coefficient

75～79

28～29

13～18

20～40

18～21

0.30～0.45

86～91

[0019] 2. After the lean coal in Lu'an has been washed, use infrared thermal image analysis and microscopic component analysis and conventional combustion and oxygen-enriched combustion tests on the clean coal to determine that the lean coal in Lu'an is processed into coal for blast furnace injection The optimum particle size range of 75 μm accounts for 70-80%, and when the particle size is 50 μm accounts for 65-75%, the shape of coal powder is regular, and the injection effect is good when it is used for blast furnace injection. After the coal is pulverized by the vertical pulv...

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Abstract

An optimizational process of lean coal for blast furnace blowing. Data after optimizational process is as follow. ash content, 9-12%; sulfur content,0.3-0.5%; fixed carbon, 75-87%; net calorific power, 27Mj / kj-30 Mj / kj; volatile fraction, 10-17%; explosiveness, 15mm-40mmh. All of them agree national standards.

Description

technical field [0001] The invention belongs to the technical field of deep processing in coal processing and comprehensive utilization, and in particular provides a method for optimizing lean coal so that it can be used for blast furnace injection, thereby rationally utilizing and giving full play to my country's lean coal and lean coal. Coal resources, promote the development of blast furnace coal injection, and improve the economic benefits of coal enterprises and iron and steel enterprises. Background technique [0002] my country is the world's largest iron-producing country, and its steel output has exceeded 200 million tons. However, coke resources are in short supply. The price of coke entering the furnace exceeds 1,000 yuan / ton, and the tax-included coke reaches about 1,200 yuan / ton. This has become a strategic issue restricting the development of ironmaking in my country. Blast furnace pulverized coal injection is to inject pulverized coal directly from the blast f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B5/00
Inventor 刘仁生
Owner SHANXI LUAN ENVIRONMENTAL ENERGY DEV
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