Production method for brown coal binding and forming

Abstract

The invention discloses a production method for brown coal binding and forming, and relates to a binding agent suitable for low-order brown coal forming and a preparation method of the coal briquette. The method comprises the following steps: (1) crushing and screening the brown coal block until the size is smaller than or equal to 3 mm; (2) dissolving polyvinyl alcohol, carboxymethyl cellulose and sodium silicate into water according to a certain ratio, and preparing a composite binding agent; (3) adding the binding agent according to a certain proportion to the brown coal raw material, stirring uniformly, and then conducting cold extrusion forming in a coal rod extrusion machine; (4) drying the formed coal rod at the temperature of 60-120 DEG C until the moisture is smaller than 10% so as to obtain the coal briquette product. The production method disclosed by the invention is simple in technology; the binding agent is wide in source, convenient to prepare, and low in cost; the coal briquette product is high in cold intensity and heat intensity both, can substitute lump coal to be supplied to a gas generator, and further can meet the requirements on the granularity and the strength for the synthesis ammonia gas-making section.

Description

technical field

[0001] The invention relates to the field of lignite briquette preparation, in particular to a binder suitable for forming low-rank lignite and a method for preparing briquette. Background technique

[0002] my country is rich in lignite resources, accounting for about 13% of the country's total coal resources, mainly distributed in eastern Inner Mongolia, eastern Yunnan, northeast and southern China, and a small amount. Because lignite has high water content, high ash content, low calorific value, easy weathering and cracking, and the molding of lignite is difficult, the use and market of lignite are limited. At present, the main industrial uses of lignite are fuel for power generation, quality improvement, extraction of montan wax, humic acid, etc.

[0003] Briquette is made of pulverized coal and processed into coal products with certain strength and shape according to industrial needs. Briquette can improve the combustion efficiency of coal, reduce envi...