Compound additive for briquettes

Abstract

The invention relates to a compound additive for briquettes, which comprises the following raw materials by weight: 5-15 parts of calcium lignosulphonate, 1-6 parts of sodium dihydrogen phosphate, 0-7 parts of electric lime, 5-15 parts of magnesium chloride, 0.5-5 parts of humic acidic ammonium, 5-15 parts of calcium hydrate, 2-6 parts of potassium nitrate, 0.5-3 parts of potassium permanganate, 0.2-2 parts of sodium nitrate, 0-3 parts of sodium chloride, 6-12 parts of kaoline, 3-7 parts of castor seed oil residue, 0.2-1 parts of polyvinyl alcohol and 8-12 parts of water. A preparation method thereof comprises the step of only uniformly mixing the raw materials by weight. The briquettes prepared by mixing the compound additive, coal washery sludge and middlings can be free of drying so as to lower the cost, has the smoke suppression effect of 70-90 percent and can also achieve the environmental protection requirements through detection by Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences and Taiyuan environmental detection center.

Description

technical field [0001] The invention belongs to a composite auxiliary agent, in particular to a composite auxiliary agent used for molded coal. Background technique [0002] The production of existing briquettes mostly adopts the mixed molding of organic liquid binder and pulverized coal. After forming, it is dried by special drying equipment to make briquettes. However, the briquettes produced by the existing drying process require equipment investment Large, a considerable amount of fuel coal is used in drying, and the self-pollution is serious, the strength of the finished product is low, and the cost of the binder used in the molded coal is high. During the combustion process, due to the collapse of the molded coal, the dust in the flue gas is large. It does not meet environmental protection standards when burned. The shortcomings of the above briquettes are mainly caused by the added compound additives, which seriously restrict the development of shaped coals. Therefor...

AI Technical Summary

Problems solved by technology

[0002] The production of existing briquettes mostly adopts the mixed molding of organic liquid binder and pulverized coal. After forming, it is dried by special drying equipment to make briquettes. However, the briquettes produced by the existing drying process require equipment investment Large, a considerable amount of fuel coal is used in drying, and the self-pollution is serious, the strength of the finished product is low, and the cost of the binder used in the molded coal is high. During the combustion process, due to the collapse of the molded coal, the dust in the flue gas is large. Does not meet environmental protection standards when burned

The shortcomings of the above briquettes are mainly caused by the added compound additives, which seriously restrict the development of shaped coal. Therefore, it is imperative to improve and increase the added compound additives.

Images