Method and equipment for producing nickel matte by using continuous converting furnace

Abstract

The invention relates to the field of smelting, in particular to a method and equipment for producing nickel matte by using a continuous converting furnace. The method comprises the following steps of (1) adopting the continuous converting furnace; (2) injecting liquid sulfur while ferronickel is refined, and completing refining and vulcanizing operation in one equipment at the same time; and (3) respectively designing tuyeres of the continuous converting furnace into an oxygen-enriched tuyere, an oxygen-poor tuyere and a nitrogen tuyere to respectively complete the process functions. According to the equipment, a sulfur injection pipe is arranged on the continuous converting furnace, and the tuyeres of the continuous converting furnace are respectively designed into the oxygen-enriched tuyere, the oxygen-poor tuyere and the nitrogen tuyere. The nickel matte is continuously produced by adopting the continuous converting furnace, and a large amount of return slag returned to an electric furnace is avoided, so that the workload of returning the large amount of converter slag to the electric furnace is thoroughly solved, and the direct recovery rate of metal is improved. Sulfur is directly added into the continuous converting furnace, and waste gas containing sulfur dioxide is intensively escaped, so that the utilization rate of the sulfur is improved, the waste gas containing the sulfur dioxide is greatly reduced, the high-grade nickel matte is produced, and the utilization rate of the equipment is improved.

Description

technical field [0001] The invention relates to the field of smelting, namely a method and equipment for producing nickel matte with a continuous blowing furnace. The laterite nickel ore is used as raw material to produce high-grade ferronickel, which is refined in a continuous converting furnace and injected with liquid sulfur to produce high matte, which is used to produce electrolytic nickel or nickel sulfate. Background technique [0002] In the prior art, the traditional method of producing high matte from laterite nickel ore is to add vulcanizing agent or sulfur into the rotary kiln, and the produced low matte is blown in PS converter to produce high matte. Such as; Indonesia's Vale, Ehman Singka's Doniambo smelter. High matte is called nickel-sulfur alloy in metallurgy, and low nickel matte produced from electric furnace is called low matte or low matte. Under the action of converter slagging agent quartz, nickel is enriched into high matte. In the traditional metho...

AI Technical Summary

Problems solved by technology

Exhaust gas reprocessing volume is large and recovery is complex

When the PS converter is enriched, a large amount of converter slag is produced during the furnace screening process, which affects the direct yield and cumbersome operation when returning to the electric furnace, which affects productivity

Furthermore, the recovery rate is affected

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