The production of calcium magnesium phosphate fertilizer by blast furnace method has certain requirements on the particle size of phosphate rock and flux entering the furnace. Screening off fine ore less than 10mm is one of the important prerequisites for smooth operation, high yield, stable yield and low consumption of blast furnace. However, at present, the content of fine ore in the raw phosphate ore is as high as 20-40%, so the treatment of fine ore has become an urgent problem to be solved in the current phosphate fertilizer plant.

HPS mixed pellet sintering belongs to the small pellet sintering process, which is to mix iron ore powder, returned ore, flux and fuel with water to make small balls with a diameter of 5-10mm, wrap a certain proportion of solid fuel on the surface of the small balls, and then sinter. Compared with the common sintering method, the small pellet sintering method has increased the process links of strengthening granulation and rolling pulverized coal outward.

Nibrasco briquetting plant was completed and put into production in August 1978. This article will describe the process flow of each section of the factory.

Nickel, as an important strategic metal material, has various advantages such as corrosion resistance, oxidation resistance, high temperature resistance, high strength and good ductility, and is widely used in modern industry. Nickel is mainly used to produce stainless steel. 65% of the world's total nickel consumption is used to produce stainless steel and 12% is used to produce heat-resistant alloys and non-ferrous metal alloys.