Method for smelting chromel alloy by stainless steel dedusting ash and laterite-nickel ore

Abstract

The invention discloses a method for smelting chromel alloy by stainless steel dedusting ash and laterite-nickel ore. The method comprises the steps as follows: a stainless steel dedusting ash briquette is manufactured; the stainless steel dedusting ash briquette is added into the laterite-nickel ore, the laterite-nickel ore is placed in an electric plasma furnace to be molten into a mother liquid, the temperature of the molten mother liquid ranges from1,650 DEG C-1,750 DEG C; coke is added for smelting after the mother liquid is molten completely, the smelting temperature is controlled in a range from 1,650 DEG C to 1,750 DEG C simultaneously, and an additive is simultaneously added for an early reduction reaction for 1-2 hours; after the early reduction reaction is finished, a fluxing agent and calcium carbonate are added for continuous reduction reaction for 1-2 hours, so that a metal liquid is obtained; the temperature of the metal liquid is adjusted in a range from 1,650 DEG C to 1,750 DEG C, dregs are removed, and the metal liquid is remained; and pouring is performed to form ingots. With the adoption of the method, waste is reused, so that pollution of the waste on the environment is reduced; and further, steel-making dedusting ash and the laterite-nickel ore are sufficiently combined for smelting, and the chromel alloy with high recovery rate and high content is obtained through addition of an NCP-2 additive.

Description

technical field [0001] The invention belongs to the field of metal smelting, and in particular relates to a method for smelting nickel-chromium alloys with stainless steel dust and laterite nickel ore. Background technique [0002] Stainless steel smelting produces a large amount of dust, because it cannot be effectively treated, it is generally stacked in the open air, drifting with the wind, seriously polluting the air environment and water quality, elements such as nickel and chromium are more harmful to the environment, but precious elements such as nickel and chromium are expensive , Recycling has important economic value, and laterite nickel ore also contains rich nickel-chromium alloys, and the combination of the two has not been reported at present. Contents of the invention [0003] Purpose of the invention: At the problems referred to above, the purpose of this invention is to provide a kind of stainless steel dedusting ash and the method for smelting nickel-chro...

AI Technical Summary

Problems solved by technology

[0002] Stainless steel smelting produces a large amount of dust, because it cannot be effectively treated, it is generally stacked in the open air, drifting with the wind, seriously polluting the air environment and water quality, elements such as nickel and chromium are more harmful to the environment, but precious elements such as nickel and chromium are expensive , recycling has important economic value, and laterite nickel ore also contains rich nickel-chromium alloys, and the combination of the two has not been reported yet.