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Composition for blast furnace coal powder injection and preparation method thereof

A composition and pulverized coal technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as low comprehensive coke ratio, environmental pollution, and low coal pulverized combustion efficiency, and achieve environmental friendliness, increase iron production, and improve The effect of hot metal quality

Inactive Publication Date: 2010-07-07
蔺国庆
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of low coal combustion efficiency, low comprehensive coke ratio and environmental pollution of the existing composition for pulverized coal injection in blast furnaces, and to provide a method that can improve the combustion efficiency of pulverized coal and comprehensive Coke ratio and environmentally friendly composition for blast furnace pulverized coal injection

Method used

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  • Composition for blast furnace coal powder injection and preparation method thereof
  • Composition for blast furnace coal powder injection and preparation method thereof

Examples

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Embodiment 1-11

[0026] This example is used to illustrate the preparation of the composition for blast furnace injection of pulverized coal of the present invention

[0027] After the purchased ferrocene, rare earth metal oxides, alkaline earth metal hydroxides, alkaline earth metal oxides, and transition metal oxides other than rare earth metals are ground to the average particle diameter specified in the present invention, each group It is mixed according to the proportion to obtain the composition T1-T11 for preparing blast furnace injection coal powder provided by the present invention.

[0028] The grinding method is to mix the materials and the steel balls in a ratio of 2:1 by the volume ratio of the balls to perform ball milling, and the conditions of the ball milling are such that each substance reaches a certain average particle diameter. Table 1 shows the amount of each substance and the average particle diameter. The average particle diameter is measured with a laser particle size test...

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Abstract

The invention relates to a composition for blast furnace coal powder injection, comprising ferrocene, rare-earth metal oxides, alkali-earth oxides, alkali-earth hydroxides and transition metal oxides except rare earth metals. The average grain diameter of each component of the composition is 5-25mm. The invention also provides a preparation method of the composition for blast furnace coal powder injection. By using the composition for blast furnace coal powder injection of the invention, coal powder combustion can be effectively improved, and comprehensive coke ratio is enhanced; when being used in iron industry, the composition has the advantages of having a little of additive amount, being environment-friendly, effectively improving molten iron quality, increasing iron yield and greatly lowering ironmaking cost.

Description

Technical field [0001] The invention relates to a composition for blast furnace blowing coal powder and a preparation method thereof. Background technique [0002] Blast furnace injection of pulverized coal refers to the direct injection of finely ground anthracite or bituminous coal or a mixture of the two from the tuyere of the blast furnace to replace coke to provide heat and reducing agent, thereby reducing coke Compared with, to reduce the cost of pig iron, it is a major technological revolution in modern blast furnace smelting. [0003] The main energy source for blast furnace ironmaking is coke. Its role in the blast furnace is to provide the heat required for the smelting process and the reducing agent required for the reduction of iron ore, as well as to maintain the framework for the permeability of the blast furnace column. Coke used for iron and steel production accounts for about 70% of the country’s total coke consumption. my country’s annual coke production exceeds ...

Claims

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Application Information

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IPC IPC(8): C10L9/10C21B3/02C21B5/00
Inventor 蔺国庆
Owner 蔺国庆
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