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A composite additive for iron ore pellets and iron ore pellets

A composite additive and iron ore pellet technology, which is applied in the field of iron ore pellets, can solve the problems of iron grade decline in pellet ore, affecting energy consumption and output of blast furnace smelting, etc., so as to reduce the return rate, reduce return rate, Effect of improving ball forming performance

Active Publication Date: 2022-07-29
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The percentage of bentonite added to the pellets in my country is on average 3% to 5%, and the lesser is not less than 2.5%, so that the iron grade of the pellets will decrease and affect the energy consumption and output of blast furnace smelting

Method used

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  • A composite additive for iron ore pellets and iron ore pellets
  • A composite additive for iron ore pellets and iron ore pellets

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Experimental program
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Embodiment Construction

[0021] Below by embodiment, the present invention is further described:

[0022] The composite additive for iron ore pellets of the present invention, in terms of mass percentage, is mixed with water by 30%-50% of tackifier, 10%-20% of strengthening agent and 5%-10% of polyethylene glycol. production. The tackifier is made of xanthan gum and locust bean gum in the ratio of (20% to 80%): (80% to 20%); the strengthening agent is made of guar gum and boron-containing compounds (20% to 40%) : (80% to 60%) ratio.

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Abstract

The invention belongs to the technical field of iron ore pellets, and mainly relates to a compound additive for iron ore pellets and iron ore pellets. In terms of mass percentage, the compound additive for iron ore pellets of the present invention ranges from 30% to 30%. 50% of the tackifier, 10% to 20% of the strengthening agent, 5% to 10% of polyethylene glycol, and the rest are water, which are prepared according to the proportions of the various components, and then uniformly mixed. This additive is mixed into iron ore powder in a certain proportion, fully mixed, and pelletized in a disc pelletizer, and then the green pellet strength is tested. This additive can effectively improve the falling strength and compressive strength of green balls and improve the quality of green balls.

Description

technical field [0001] The invention belongs to the technical field of iron ore pellets, and mainly relates to a composite additive for iron ore pellets and iron ore pellets. Background technique [0002] Pellets have the advantages of uniform particle size, high cold strength, high iron grade, and good reducibility. They are an indispensable high-quality charge. Achieving environmental friendliness has played a significant positive role. [0003] The pellet binder is a key auxiliary raw material for the production of pellets in the iron and steel industry, and its performance is directly related to the quality of the pellets. Bentonite has been used as a pellet additive for decades, and it is a high-quality additive recognized by pellet manufacturers at home and abroad. The layered structure of bentonite contains a large amount of molecular bound water in the crystal layer, and can absorb 600%-700% of water at the same time. Although it is beneficial to forming a ball, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/244
CPCC22B1/244
Inventor 巨建涛唐琛妹棘广恒邢相栋马轲李坚毅朱智洪杨康帅
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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