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Composite adhesive containing coal iron powder pellets

A compound adhesive and adhesive technology, which is applied in the field of smelting reduction ironmaking, can solve the problems of high consumption and inability to directly use powder ore.

Inactive Publication Date: 2010-05-05
田原宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of the Corex process is that coal is used without coke, and there is no coke oven pollution. The disadvantage is that fine ore cannot be directly used, and the consumption is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of coal-iron powder pellet composite binder is composed of modified ammonium humate, starch and flux, and the weight percentage of various components is:

[0022] Modified Ammonium Humate 40%

[0023] Pregelatinized Starch 10%

[0024] Magnesium Oxide 12.5%

[0025] Magnesium Chloride 10%

[0026] Lime powder 27.5%

Embodiment 2

[0028] A kind of coal-iron powder pellet composite binder is composed of modified ammonium humate, starch and flux, and the weight percentage of various components is:

[0029] Modified Ammonium Humate 35%

[0030] Starch 9%

[0031] Magnesium Oxide 13.5%

[0032] Magnesium Chloride 10.5%

[0033] Quicklime powder 32%

Embodiment 3

[0035] A kind of coal-iron powder pellet composite binder is composed of modified ammonium humate, starch and flux, and the weight percentage of various components is:

[0036] Modified Ammonium Humate 45%

[0037] Starch 15%

[0038] Magnesium Oxide 12.5%

[0039] Magnesium Chloride 10%

[0040] Lime powder 17.5%

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PUM

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Abstract

The invention relates to a composite adhesive containing coal iron powder pellets, which comprises 30-50% of modified ammonium humate, 5-15% of starch, 40-60% of flux and other components. The adhesive is added in the form of dry powder, the adding way is simple and easy to control, the adding amount is 4-6%, and the adhesive has broad resources of raw materials, low cost, no introduction of alkali metal elements which are harmful to the iron-making technology, high cold and hot strength of the molded pellets and high thermal stability of higher than 90%, and is conductive to reducing the melting point for iron-making by smelting reduction. The composite adhesive can meet the needs of large-scale production and easy popularization.

Description

1. Technical field [0001] The invention relates to a composite binder containing coal and iron powder pellets, which belongs to the field of smelting reduction ironmaking, and is particularly suitable for producing molten iron with carbon-containing cold-solidified pellets by a smelting reduction method. 2. Background technology [0002] The modern blast furnace has a history of hundreds of years, and its technology has reached a fairly perfect level. However, while it is becoming more and more perfect and large-scale, it also brings problems such as long process, large investment and environmental pollution. Coking coal resources are limited in the world, and China's coking coal is also insufficient, and the pollution of the coking process is serious. China is already a big steel producing country in the world, and the output of pig iron is the first in the world. In 1995, the output of pig iron exceeded 100 million tons, and the output of coke reached 72 million tons. No...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/244
Inventor 田原宇乔英云
Owner 田原宇
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