Prepn of powdered briquette adhesive

Abstract

A preparation method of a dry powder briquette binder, which adopts a spray-drying method to produce a finished product, adding humic acid (1) and sodium hydroxide (2) into hot water (3) at a ratio of 6-12:1, React in the glass-lined reactor (4) to generate liquid briquette binder (7), store it in the storage tank (9) after the filtration process (8), and then use the plug pump (10) to squeeze into the spray drying tower ( 11) Spray granulation is carried out inside, and hot air is input at the same time to make the granules dry quickly, and the waste gas is dedusted by water foam and then emptied. The finished product collected by the spray drying tower (11) has a moisture content of 3-17%, a fineness of 40-100 mesh, and can be directly bagged without crushing process. The technological process of the invention is reasonable and fast, the production efficiency is increased by more than 3 times, the manufacturing cost is reduced by 30%, the dissolution time is shortened by more than 70%, the environmental pollution is greatly reduced, and all physical and chemical indicators meet the relevant standards.

Description

technical field [0001] The invention relates to a preparation method of a coal binder, in particular to a preparation method of a dry powder shaped coal binder. Background technique [0002] The production method of dry powder briquette binder now, the one, adopt mixing method, directly two or more dry powder raw materials are bagged after manual or mechanical mixing. Inorganic components account for the majority in the manufactured products of this method, and the produced briquettes have high ash content and low fixed carbon content, which correspondingly reduces the calorific value and gas generation of the briquettes. Then there are liquid adhesives made of humic acid as the main raw material, which are further processed into dry powder briquette adhesives. Generally, there are three drying methods: one is drying in the sun; the other is drying with a drum dryer; the third is drying. Dry in a flash dryer or disc dryer. After these three methods are dried, they need to ...

AI Technical Summary

Problems solved by technology

Because the process is long, the production efficiency is difficult to improve, the production cost remains high, and the dry powder adhesive produced has a slow melting speed, which affects the production efficiency of coal briquettes

Since sodium humate is a heat-sensitive briquette binder, a little carelessness in the production process will affect the physical and chemical indicators of the briquette binder, thereby reducing the quality of the binder

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