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Technique for producing agglomeration by mixing sulfuric acid residue and concentrate

A process technology, a technology of sulfuric acid slag, is applied in the field of production technology of pellets for blast furnace smelting, can solve problems such as no pellets involved, and achieve the effects of being beneficial to environmental protection, improving compressive strength, and meeting production requirements

Inactive Publication Date: 2008-09-10
CHONGQING IRON & STEEL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, none of the above technologies involves the process of directly mixing sulfuric acid slag and concentrate to make pellets

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The technique for producing pellets by mixing sulfuric acid slag and concentrate of the present invention is characterized in that:

[0018] 1. The iron grade is 30% - 55% sulfuric acid slag is mixed with the concentrate, of which,

[0019] The weight percentage of sulfuric acid slag is 10%-18%, and the weight percentage of concentrate is 82%-90%;

[0020] 2. Add bentonite to the mixed ore of the above-mentioned sulfuric acid slag and concentrate, and the weight of bentonite accounts for 1%-3.2% of the weight of the mixed ore;

[0021] 3. Minerals mixed with the above-mentioned sulfuric acid slag, concentrate and bentonite, part of which is rubbed with a mushroom machine and mixed with the rest evenly to obtain a mixed ore of sulfuric acid slag, concentrate and bentonite, which is used as a material for producing pellets spare.

[0022] In assembly line operation, the best way is to grind 50% of the mixture of sulfuric acid slag, concentrate and bentonite with a mushr...

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Abstract

The invention discloses a technique for preparing pellet by mixing the purple ore and the ore concentrate. The purple ore with the iron grade ranging from 30 to 55 percent is mixed with the ore concentrate, the weight percentage of the purple ore ranges from 10 to 18 percent, the weight percentage of the ore concentrate ranges from 82 to 90 percent; the swell soil is added into the mixed ore to mix, the weight of the swell soil occupies 1 to 3.2 percent of the weight of the mixed ore; one part of the mixed ore substance is grinded by a globe mill and is mixed with the remaining part evenly to obtain the mixed ore of purple ore and the ore concentrate as well as the swell soil, the mixed ore is taken as the material for preparing the pellet. The technique can make the best of the industry waste of purple ore, changes waste into valuable and ensures that the purple ore as a resource containing iron ore is used effectively; part of the purple ore replaces the ore concentrate and the ore cost is lowered, thereby lowering the smelting production cost and increasing the competitive force of the enterprise; a slag yard is not necessary to pile up the purple ore, thereby avoiding the environmental pollution of the purple ore and being beneficial to the environment protection.

Description

technical field [0001] The invention relates to a production technology of pellets for blast furnace smelting, in particular to a technology for producing pellets by mixing sulfuric acid slag and concentrate. Background technique [0002] Sulfuric acid slag is a waste produced during the production of sulfuric acid, and sulfuric acid slag is rich in iron, and its iron grade is usually 30%-55%. However, in the prior art, sulfuric acid slag is used as an industrial waste product and is piled up in the slag yard. Due to leakage and the influence of residual sulfur in the sulfuric acid slag, the sulfuric acid slag has caused great pollution to the surrounding environment. In fact, sulfuric acid slag is also a kind of iron-containing ore. In today's shortage of resources, how to rationally utilize and effectively develop sulfuric acid slag has become an inevitable choice. [0003] In the prior art, pellets for blast furnace smelting are usually obtained by pelletizing concentrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/14
CPCY02P10/20
Inventor 王天雄陆震胡钢龚艺杰
Owner CHONGQING IRON & STEEL (GRP) CO LTD
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