Pelletizing method for reducing bentonite consumption

A bentonite and pelletizing technology is applied in the field of pelletizing to reduce the consumption of bentonite, which can solve the problems of short expansion time, increased consumption of bentonite, and reduced pelletizing quality, and achieves improved pelletizing performance, reduced waste, and optimized particle size composition. Effect

Inactive Publication Date: 2015-12-16
SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is less water in the existing pelletizing raw materials, and the bentonite absorbs water and has a short swelling time. In addition, it is difficult for the montmorillonite to fully expand and interact with the concentrate powder particles. play a role, thus causing an increase in the consumption of bentonite and reducing the quality of the pellets

Method used

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  • Pelletizing method for reducing bentonite consumption

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The pelletizing method for reducing the consumption of bentonite described in this embodiment uses bentonite as a binder, and includes the process steps of mixing, pelletizing, drying and preheating, and roasting. In the mixing step, the weight ratio is 50%. The mixture of Qinggangping concentrated ore powder and Xichangnan concentrate powder with a weight ratio of 50% is used as pelletized ore concentrate powder. When mixing materials, spray water on the surface of the bentonite, and the amount of water added is 1.5t / h, and then mixed with The spheroidizing concentrate powder is mixed, and the bentonite accounts for 1.4% of the total weight of the mixed powder.

[0031] The Qinggangping concentrate powder and the Xichangnan concentrate powder are dried before being mixed, and then crushed by a roller press. The particle size of the pulverized Qingbangping concentrate powder is: the weight ratio of passing through a 200-mesh sieve is 60-65%, the particle size of the pul...

Embodiment 2

[0034] The pelletizing method described in this embodiment to reduce the consumption of bentonite uses bentonite as a binder, including the process steps of mixing, pelletizing, drying, preheating, and roasting. The difference from the pelletizing method described in Embodiment 1 is:

[0035] In the mixing step, a mixture of 55% by weight of Qinggangping concentrate powder and 45% by weight of Xichangnan concentrate powder is used as the pelletizing concentrate powder. When mixing, the bentonite accounts for the 1.45% of the total weight of the mixed powder.

Embodiment 3

[0037] The pelletizing method described in this embodiment to reduce the consumption of bentonite uses bentonite as a binder, including the process steps of mixing, pelletizing, drying, preheating, and roasting. The difference from the pelletizing method described in Embodiment 1 is:

[0038] In the mixing step, a mixture of 60% by weight of Qinggangping concentrate powder and 40% by weight of Xichangnan concentrate powder is used as the ball concentrate powder. When mixing, the bentonite accounts for the 1.5% of the total weight of the mixed powder.

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Abstract

The invention discloses a pelletizing method for reducing bentonite consumption. Bentonite is adopted as a binding agent. The pelletizing method comprises the steps of mixing, pelletizing, drying and preheating and roasting. In the step of mixing, a mixture of Qing Gangping concentrate powder with the weight ratio of 50%-70% and XiChang South concentrate powder with the weight ratio of 30%-50% is adopted as pelletizing concentrate powder; and during mixing, water is firstly added to the bentonite to wet the bentonite, and then the bentonite is mixed with the pelletizing concentrate powder to form mixed powder. The bentonite is fully expanded through selective treatment on concrete powder raw materials and control over parameters in the bentonite mixing step, the concentrate power is in full contact with the bentonite, the effective utilization rate of the bentonite is improved, and therefore pelletizing quality is improved.

Description

technical field [0001] The invention relates to pelletizing technology, in particular to a pelletizing method for reducing bentonite consumption. Background technique [0002] Due to its good metallurgical properties and the advantages of improving the air permeability of the blast furnace charge column, pellets are considered to be a high-quality charge necessary for the optimization of the blast furnace charge structure. Modern blast furnace ironmaking is developing towards the goals of high production, low consumption, and long life. The use and function in the iron and steel industry are becoming more and more urgent and important, and it has become an indispensable blast furnace charge, and its usage is also increasing. At present, most domestic and foreign pellet mills use bentonite as the binder, and the amount of bentonite is generally 1.5-3.0%, or even higher. The increase in the amount of bentonite will not only increase the consumption of auxiliary materials in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/243
Inventor 杨百顺麦吉昌廖远峰向成功赵力万成周平
Owner SICHUAN DESHENG GRP VANADIUM & TITANIUM CO LTD
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