Cold press composite pellet binder

Abstract

The invention relates to a novel caking agent for preparing a pellet used for smelting by using a cold pressing method, in particular to a caking agent which needs to be added when using the cold pressing method to prepare a composite pellet comprising manganese powder. The invention is characterized in that the caking agent is formed by mixing the following two matters: (1) cornstarch and potato starch are used as the main materials, potassium permanganate and sodium hydroxide are added and mixed; and (2) solid sodium silicate is used as a main component, aluminum potassium sulfate and sodium fluosilicate are added. The first types of matters mainly obtain the wet pellet intensity and meet the intensity demand of the strap transmission on the pellet between a pellet press and a drying kiln. The second types of matters mainly obtain the dry pellet intensity, meet the intensity demand of transmission and autoimmunization pellet matching on the pellet and maintain the pellet to not crack at high temperature. Compared with the traditional sintering technique, the cold-pressing composite pellet caking agent saves the energies and reduces pollution. The technique can also be applied to produce carbon pellets, realizes using coal for replacing coke, reduces the cost of the reducer and promotes the comprehensive utilization of the resources.

Description

technical field [0001] The invention relates to a new type of binder for preparing pellets for smelting by cold pressing, more specifically, it belongs to the binder that needs to be added when preparing composite pellets containing manganese powder by cold pressing. Binder plays a key role in the preparation of composite pellets. Background technique [0002] About 90% of my country's manganese ore is lean ore containing less than 30% manganese. Generally, coarse-grained ore washing, gravity separation and strong magnetic separation are used. With the development of production, the amount of fine ore is gradually increasing. Due to the amount of lump ore Insufficient supply, objectively requires the use of fine ore to make agglomerates. Due to the small amount of processing and other reasons, manganese powder ore agglomeration is mostly sintered by the earth method, that is, the so-called flat blowing - the ore powder and coke powder are piled on the ground grate, and then ...

AI Technical Summary

Problems solved by technology

[0004] Although there are many kinds of binders to choose from, once the technical and economic factors are comprehensively considered, it will be found that it is difficult to have a universal binder suitable for a variety of mineral powders. It can only be said that under specific raw material conditions , choose the kind of binder that can better meet the required smelting process requirements, of course, for the same type of mineral powder, the versatility still exists