A kind of pellet binder and its preparation method and application

Abstract

The invention discloses a pellet binder and a preparation method and application thereof, which comprise, in parts by weight, the preparation raw materials of the following components: 3-5 parts of modified konjac flour, 8-10 parts of modified bentonite, magnesium oxide 0.5-1 part, 0.5-1 part of calcium oxide, the konjac flour molecule that the present invention adopts contains a large amount of functional groups, by carrying out activation modification with it and alkali lignin, its viscosity is further improved, simultaneously can be mixed with iron concentrate particle It produces strong adsorption, and can significantly improve the compressive strength of the pellets when the dosage is low, and sodium bentonite is obtained by sodium bentonite with larger interlayer spacing, and then water glass and silica sol are added to form the interlayer of bentonite The formation of porous substances is conducive to the adsorption of functional groups such as phenolic hydroxyl groups in alkali lignin and konjac flour to bentonite, which promotes more uniform dispersion of bentonite and improves the distribution characteristics of the binder between iron ore particles. The chemical adsorption on the surface of ore particles increases, thereby improving the performance of green balls.

Description

A kind of pellet binder and its preparation method and application technical field The present invention relates to metallurgical technology field, be specifically related to a kind of pellet binder and preparation method and application thereof. Background technique As the rich ore resources that can be directly fed into the furnace for ironmaking are increasingly exhausted, the development of the lean ore resources is rapidly developed, and the lean ore resources are rapidly developed. High-grade iron ore concentrate powder can be obtained through processes such as crushing, grinding and beneficiation of resources, but iron ore concentrate powder is difficult to be directly fed into the furnace, and it must be It must be agglomerated before it can be smelted in the furnace. Sintering and pelletizing are two different agglomeration technologies for finely ground iron powder. It has the advantages of high TFe grade, good physical properties and metallurgical properties...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a pellet binder and its preparation method and application, so as to solve the technical problem of poor strength of the pellets prepared by the current binder

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