Metallurgical pellet binding agent and process for pressing pellets by using same

Abstract

The invention relates to a metallurgical pellet binding agent which can reach the strength required by metallurgy, and a process which can improve the qualification rate of the metallurgical pellet products, simplify the technical process and reduce the cost and presses the pellet products by using the binding agent. The metallurgical pellet binding agent comprises the following raw materials: 1.435 kilos of blue vitriol, 0.5 kilo of red vitriol, 221 kilos of sodium silicate, 110.5 kilos of water, which are heated and mixed evenly. 425# Portland cement accounting for 3-8 percent of the metallurgical raw materials is added, and the metallurgical pellet binding agent is obtained. The metallurgical raw materials and the 425# Portland cement are mixed in a stirrer in terms of fixed quantity according to a proportion of 1:0.03-0.08. The rest raw materials of the binding agent, which account for 3-8 percent of the added 425# Portland cement, are sprayed in the mixture material. Pellets are obtained by means of pressing in a ball press. The pellets are maintained and dried and then can be placed into a furnace for use. The metallurgical pellet binding agent has the advantages of low binding cost and high pellet strength, is economical and practical and can bind different metallurgical scraps together, particularly iron concentrate powder and pulverized coal, so as to press and shape the metallurgical pellets satisfying the metallurgical requirement.

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