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Novel binder for metallurgical pellets

A binder and pelletizing technology, which is applied in the field of new metallurgical pelletizing binders, can solve problems such as failure and bursting, and achieve the effects of increasing production capacity, improving pelletizing performance and reducing the amount of addition.

Inactive Publication Date: 2011-04-20
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

I also tried to use sodium bentonite alone, although the unit consumption was reduced, but it failed due to the bursting problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Described component weight ratio is:

[0048] Natural calcium-based bentonite 100 parts

[0049] Sodium carbonate 2-3 parts

[0050] Sodium cellulose 1.1-1.3 parts.

Embodiment 2

[0052] Described component weight ratio is:

[0053] Natural calcium-based bentonite 100 parts

[0054] Sodium carbonate 3-4 parts

[0055] Sodium cellulose 1.4-1.6 parts.

Embodiment 3

[0057] Described component weight ratio is:

[0058] Natural calcium-based bentonite 100 parts

[0059] Sodium carbonate 4-5 parts

[0060] Sodium cellulose 1.7-2.0 parts.

[0061] The beneficial effects of the present invention are:

[0062] 1. Reduce the amount of binder added in pellet production and improve the iron grade of pellets. The amount of binder added is reduced from 35kg / ton of pellets to 16kg / ton of pellets, and the grade of pellet iron is increased by one percentage point, with obvious economic benefits.

[0063] 2. The binder can effectively improve the ball forming performance, increase the burst temperature of the green ball, and increase the burst temperature of the green ball from 400°C to 450°C, shorten the drying time and increase the production capacity.

[0064] 3. The experimental results show that the metallurgical performance of the pellets produced by the binder is stable. It provides reference significance for the beneficiation of similar dom...

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Abstract

The invention belongs to metallurgical raw materials and pretreatment technology, and in particular relates to a novel binder for metallurgical pellets. The novel binder for the metallurgical pellets consists of the following components in part by weight: 100 parts of natural calcium-based bentonite, 2 to 5 parts of sodium carbonate and 1.1 to 2.0 parts of sodium cellulose, wherein the natural calcium-based bentonite is natural calcium-based bentonite with montmorillonite content of more than 54 percent. The preparation method comprises the following steps of: adding 2 to 5 weight parts of sodium carbonate into 100 weight parts of natural calcium-based bentonite for sodium treatment, drying until the moisture content is below 12 percent, performing ore grinding until the ore with granularity of less than 43 microns is over 90 percent, adding 1.1 to 2.0 weight parts of sodium cellulose, and stirring and uniformly mixing to prepare the novel binder for the metallurgical pellets. The pellet forming property of green pellets can be effectively improved, the cracking temperature of the green pellets is improved, the metallurgical property of pellet ore is improved, and the binder has the effects of increasing the yield and reducing the consumption for the production of the pellet ore.

Description

technical field [0001] The invention belongs to metallurgical raw materials and pretreatment technology, in particular to a novel binder for metallurgical pellets. Background technique [0002] Over the years, several mining pellet factories have used bentonite as the pellet binder. The soil type of bentonite is mainly natural calcium-based bentonite, and its unit consumption is more than 35kg / ton of balls, which is relatively high. It has also been tested to use sodium bentonite alone, although the unit consumption has been reduced, but it failed due to the problem of bursting. In order to select a pellet binder with better performance, reduce the amount of binder added in the pellet production process, ensure the full iron grade of the finished pellets, and improve the metallurgical performance of the pellets, it is very necessary to research and develop a new type of binder. Binder used in the production of metallurgical pellets. Contents of the invention [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243C22B1/244
Inventor 姚强王红艳金忠伟石文东
Owner ANSTEEL GRP MINING CO LTD
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