Semi-coke powder and brown coal matched forming method

Abstract

The invention discloses a semi-coke powder and brown coal matched forming method for the first time. The method includes steps: (1) drying brown coal; (2) respectively screening the dried brown coal and semi-coke powder; (3) mixing the screened semi-coke powder and brown coal to obtain a mixed material; (4) subjecting the mixed material to forming to obtain formed balls. By direct forming after proportional mixing of the semi-coke powder and the brown coal, compressive strength of the formed balls reaches 199-237N per ball, and the ball forming rate reaches 92-94%. The method has advantages that addition of adhesives is avoided, forming cost is reduced, technical simplicity is achieved, and comprehensive utilization of the semi-coke powder and the brown coal resources is realized.

Description

technical field [0001] The invention relates to a method for molding semi-coke powder mixed with lignite. Background technique [0002] In recent years, air pollution in Chinese cities and urban agglomerations has become increasingly serious, and smog and haze have occurred frequently in the Beijing-Tianjin-Hebei region, the Yangtze River Delta and the Pearl River Delta. One of the important reasons is that SO 2 (invisible, pungent smell) transformed overnight into sulfates (visible, component of haze). For a long time, coal has accounted for more than 75% of China's energy mix. 80% of China's coal resource consumption is used for direct combustion, and more than 70% of the smoke and dust emitted by Chinese cities into the atmosphere and SO 2 90% of the total comes directly from coal combustion, and the direct combustion of a large amount of coal has become the main source of air pollution. Therefore, the development, promotion and application of clean energy is a millen...

AI Technical Summary

Problems solved by technology

In this molding technology, there are mainly two disadvantages: (1) too many additives, among which the cost of anthracite powder, starch and sodium carbonate is relatively high; (2) due to the addition of clay powder, the ash content of the final briquette product is too large, increasing the The burden on the boiler also reduces the calorific value of the briquette

The quality characteristics of semi-coke powder are similar to those of semi-coke blocks, but due to the small particle size, it cannot be used in industrial production, and it is only used locally in semi-coke producing areas.

However, the output of semi-coke powder is far greater than the amount used by the local people. It has been piled up in the open air for a long time, and it is blown by the wind. At the same time, the dust during loading and unloading is also extremely serious, which greatly pollutes the ambient air.

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