Method for recycling acid regeneration iron powder pressed balls

Abstract

The invention discloses a method for recycling acid regeneration iron powder pressed balls, and belongs to comprehensive utilization of the steel making field. The method is characterized by comprising the following steps of: mixing 50 to 70 mass parts of acid regeneration iron powder and 50 to 30 mass parts of dust removing ash uniformly, adding 3 to 8 mass parts of MgCl2 solution, mixing uniformly, performing extrusion forming on a roll ball press, and adding the formed iron balls into an electric furnace for smelting. By the method, the metal yield is improved, the acid regeneration iron powder is utilized, the dust removing ash is also utilized, and meanwhile, the consumption of chromium-nickel alloy in the steel making process is reduced, so that the production cost of stainless steel is reduced.

Description

technical field [0001] The invention relates to a method for recycling acid regenerated iron powder briquettes, which belongs to the comprehensive utilization in the field of steelmaking. Background technique [0002] Acid regenerated iron powder (ρ 松装 = 0.41~0.45 g / cm 3 ) physical and chemical properties, see Table 1, 2. It can be seen from the table that the regenerated iron powder contains relatively high Cr 7.94% and Ni 4.45%, and has high utilization value, but the particle size is fine (over 90% of the particle size is less than 0.180 mm), and the specific gravity is small. It is directly added to the electric furnace, which is very easy to generate dust pollution. Metal yield is low. [0003] Table 1 Main chemical composition of acid regenerated iron powder wt% [0004] TF Cr Ni S P Si 54.13 7.94 4.45 0.337 0.032 ＜0.1 [0005] Table 2 Particle size distribution of acid regenerated iron powder [0006] ...

AI Technical Summary

Problems solved by technology

It can be seen from the table that the regenerated iron powder contains relatively high Cr 7.94% and Ni 4.45%, and has high utilization value, but the particle size is fine (more than 90% of the particle size is less than 0.180 mm), and the specific gravity is small. When directly added to the electric furnace, it is easy to generate dust pollution. low metal yield