A metallurgical pellet adhesive and a process for pressing pellets using the adhesive

Abstract

The invention relates to a metallurgical pellet adhesive capable of achieving the strength required for smelting and a process for pressing pellet products using the adhesive which can improve the qualified rate of metallurgical pellet products, simplify the process and reduce costs. Including the following raw materials: 1.435 kg of blue vanadium, 0.5 kg of red sail, 221 kg of sodium silicate, 110.5 kg of water, heated and mixed evenly; 425# ordinary cement is added at 3-8% of the metallurgical raw materials to become a metallurgical pellet binder. Mix metallurgical raw materials and 425# ordinary cement quantitative feeding in a mixer, the ratio is 1:0.03-0.08, spray the rest of the adhesive raw materials in the mixed raw materials, and the ratio is 3-3% of the amount of 425# ordinary cement 8%, and finally pressed into pellets in a briquette machine, and after curing and drying, it can be put into the furnace for use. It has the advantages of low bonding cost, high pellet strength, economical and practical, and can bond different metallurgical wastes, especially iron concentrate powder and coal powder, to form metallurgical pellets that meet smelting requirements.

Description

technical field [0001] The invention relates to a pellet adhesive used in the metallurgical industry that can reach the strength required for smelting, and a process for pressing pellets with the adhesive that can improve the qualified rate of metallurgical pellet products, simplify the production process, and reduce production costs . Background technique [0002] In metallurgical enterprises, when processing and producing sintered ore, it is necessary to mix and granulate iron concentrate, coke powder, and bentonite in a cylinder mixer in proportion, and then send them to a ring-type or belt-type sintering machine for sintering into blast furnace smelting. This sintering method has unfavorable factors such as complex production process, high investment cost, high energy consumption, and environmental pollution; there are also dust recovered from electric arc furnaces and converters for steelmaking, and scrap steel left over from intermediate ladles for steelmaking Slag, t...

AI Technical Summary

Problems solved by technology

[0002] In metallurgical enterprises, when processing and producing sintered ore, it is necessary to mix and granulate iron concentrate, coke powder, and bentonite in a cylinder mixer in proportion, and then send them to a ring-type or belt-type sintering machine for sintering into blast furnace smelting. This sintering method has unfavorable factors such as complex production process, high investment cost, high energy consumption, and environmental pollution; there are also dust recovered from electric arc furnaces and converters for steelmaking, and scrap steel left over from intermediate ladles for steelmaking Slag, the scrap of sinter sieve, which contains a lot of iron and can be recycled

Some enterprises use these waste materials and adhesives to make pellets as raw materials or auxiliary materials and return them to the furnace for smelting. The selected adhesives generally have the problems of low cold strength and low thermal strength, and the pellets have a high breakage rate when entering the furnace. After the pellets are put into the furnace, they are severely broken at high temperature, resulting in abnormal furnace conditions, which affects the rational utilization of these wastes