Coal gangue biomass solid forming fuel and preparation method thereof

Abstract

The invention discloses a coal gangue biomass solid briquettes fuel, which comprises the following components in percentage by weight: 40 to 85 percent of coal gangue with the combustion heat value higher than 2,000 kilocalories, 10 to 50 percent of agricultural organic waste, 1 to 5 percent of combustion improver, and 1 to 5 percent of adhesive. The method for preparing the coal gangue biomass solid fuel comprises the following steps: crushing the coal gangue with the combustion heat value higher than 2,000 kilocalories; and adding the agricultural organic waste, the combustion improver, and the adhesive in a certain proportion to directly produce the coal gangue biomass solid forming fuel with a stable combustion value by adopting forming machinery. The solid forming fuel is prepared by reasonably using a large quantity of agricultural organic waste and the coal gangue in a certain proportion; and the combustion heat value is stable. The biomass solid forming fuel can be used as the fuel of boilers, stoves and other combustion devices, and has good social benefits, environmental protection benefits, and economic benefits.

Description

Technical field [0001] The invention relates to a solid fuel, in particular to a coal gangue biomass solid briquette fuel related to the harmlessness and resource utilization of coal gangue and a preparation method thereof. Background technique [0002] Coal gangue is a solid waste discharged during coal mining and coal washing. It is a black-gray rock with lower carbon content and harder than coal that is associated with coal seams during coal formation. It is a carbonaceous and argillaceous shale. The mixture of rock has a lower calorific value. Generally 20%-30% carbon, and its main component is Al 2 O 3 , SiO 2 , It also contains different amounts of Fe 2 O 3 , CaO, MgO, Na 2 O, K 2 O, P 2 O 5 , SO 3 And trace rare elements (gallium, vanadium, titanium, cobalt). [0003] From the perspective of coal mining, China produces 100 million coal every year and emits about 14 million tons of gangue; from the perspective of coal washing and processing, every 100 million tons of coking ...

AI Technical Summary

Problems solved by technology

[0006] At present, coal gangue in various parts of our country is mainly used in the production of building materials such as gangue cement, lightweight aggregate of concrete, refractory bricks, production of chemical products such as crystalline aluminum chloride and water glass, and extraction of precious and rare metals, and some are used as waste Although these utilization methods also utilize the main components of coal gangue to achieve the purpose of turning waste into treasure, they waste the effective heat components in coal gangue