Binder adapted for production of cooled agglomerated pellet by using iron-bearing material

Abstract

The invention relates to a binder, especially a binder suitable for producing cold-set pellets from iron-containing materials. The binder is composed of alkaline foaming alkali, cold-soluble polyvinyl alcohol, polyacrylonitrile fiber, and light calcium carbonate. It has the characteristics of high viscosity, fast ball formation, and low cost. It can use iron-containing waste to make pellets. , can improve the pelletizing performance of iron-containing materials, improve the quality of pellets, increase the micropores in pellets, improve the smelting reduction of pellets, high strength of cold-set pellets, no sintering, and pulverization rate Low cost, can replace lump ore directly for steelmaking and ironmaking.

Description

technical field [0001] The invention relates to a binder, especially a binder suitable for producing cold-set pellets from iron-containing materials. Background technique [0002] At present, bentonite is mostly used as a binder in the production of pellets in my country's metallurgical industry. However, during the process of forming pellets, the return rate of the binder is 25-30%, which remains high. When drying, its drying speed is slow. , affecting output and increasing energy consumption. And the main component of bentonite is SiO 2 and Al 2 o 3 According to general experience, with the addition of 1% bentonite, the Fe-containing grade of the pellets will decrease by 0.6%, and the slag output will increase by 8-10%. my country's pellet mills add 4% of bentonite on average, the most of which reaches 7-8%, and the least of which is no less than 2.5%, so that the iron-containing grade of the pellets will decrease, affecting the energy consumption and output of smelting...

AI Technical Summary

Problems solved by technology

my country's pellet mills add 4% of bentonite on average, the most of which reaches 7-8%, and the least of which is no less than 2.5%, so that the iron-containing grade of the pellets will decrease, affecting the energy consumption and output of smelting, and affecting the blast furnace. Smelting causes huge economic losses