Method for plasticizing lower-grade metamorphic bituminous

Abstract

The invention discloses a method for plasticized low metamorphic bituminous coal. The method is to uniformly mix the low metamorphic bituminous coal and hydrogenation solvent, to take ferric oxide as catalyst, to infuse hydrogen for reaction, and to obtain a product, wherein, the hydrogenation solvent is tetranap; the amount of the hydrogenation solvent is 2.0 to 2.5 times of the mass of the low metamorphic bituminous coal, and the hydrogen pressure is between 2 and 6 MPa; the amount of the catalyst ferric oxide and the amount of the cocatalyst brenstone are respectively 1 to 6 percent and 1 to 3 percent of the mass of the raw materials, namely the low metamorphic bituminous coal; and the reaction temperature is between 340 and 400 DEG C and the reaction time is between 20 and 60 minutes. The method is simple and convenient in technique and easy to operate; and the conversion rate of the raw material coal can reach over 80 percent, and the reaction hydrogen consumption is 0.45 percent. The technical property of the plasticized product is similar to that of gas coal; the mean maximum reflectivity Rmax of a vitrinite is about 0.76 percent; and the bond property is obviously strengthened and the binding index reaches about 60. The low metamorphic bituminous coal product obtained by utilization of the plasticizing method provided by the invention completely meets the requirements of coal blending and coking and has important industrial application value.

Description

technical field [0001] The invention relates to a method for plasticizing low-modified bituminous coal. Background technique [0002] Coke is an essential raw material for the iron and steel industry. Under the current technical conditions, to refine qualified coke, the coking coal must have a certain degree of cohesiveness. Generally, the cohesive index is required to be above 55. At the same time, the dry base ash content should be less than 10%, and the sulfur content Less than 0.6%. [0003] China's coal resources are relatively abundant, with a complete range of varieties, but the distribution is uneven, especially the high-quality coking coal reserves are insufficient. With the expansion of China's coking industry, the shortage of high-quality coking coal will become more prominent. On the other hand, there are abundant low-ash, low-sulfur, and low-phosphorus low-metamorphic bituminous coal resources in western China, which are usually not used for coking coal blendi...

AI Technical Summary

Problems solved by technology

In terms of coal hydrogenation, gas phase hydrogenation or liquefaction hydrogenation is commonly used at present, which requires high pressure and temperature, and the plasticity of coal after hydrogenation does not increase significantly

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