52 results about "Coal ball" patented technology

The application discloses a preparation method of nitrogen, phosphorus and sulfur co-doped coal-based carbon aerogel, and comprises the following steps: firstly, ball-milling and screening raw coal to obtain coal powder; pre-oxidizing the coal powder in air at 250-350 o C to obtain pre-oxidized coal powder; and preparing the pre-oxidized coal powder, K2CO3 and PVP into a coal-based carbon aerogel precursor, and co-doping the coal-based carbon aerogel precursor with nitrogen, phosphorus and sulfur heteroatoms to obtain the coal-based carbon aerogel. The method can not only improve the specific surface area, porosity and hydrophilicity of the material, but also improve the specific capacitance of the coal-based aerogel, and make the coal-based aerogel have better electric conductivity.

The application provides a method and briquettes suitable for long-flame coal powder and tar residue mixed briquetting, and belongs to the field of harmful solid waste recycling. The method comprises the following steps: 1, obtaining tar residue by fractional precipitation of coal tar; 2, mixing the tar residue in step 1 with long-flame coal to obtain a mixture; 3, pressing the mixture in step 2 into briquettes; in step 1, the fractional precipitation comprises primary precipitation and secondary precipitation; the lower precipitate in the secondary precipitation is the tar residue. The application uses long-flame coal powder and tar residue after pyrolysis of long-flame coal tar as raw materials, does not need to use additional binders, and can form briquettes by mixing and pressing, thereby realizing harmless treatment and recycling of the tar residue.