METHOD OF NICKEL PRODUCTION DUMP CONVERTER SLAGS PROCESSING WITH PRODUCTION OF SEMI-FINISHED NICKEL FOR FABRICATION OF '20ХН2М' AND '20Н2М' STEELS

摘要

FIELD: process engineering.;SUBSTANCE: invention relates to metallurgy. Proposed method comprises crushing of said slag in ball mill and screening it by means of screen with mesh dimension of 1 mm. Steel 20 blanks are machined to produce 1 mm deep chips to be dipped for 1-2 minutes in bath with diluted hydrochloric acid. Said chips are flushed and dried to moist removal. 10-20 wt % of chips are mixed with 80-90 wt % of screened dump converter slag to add over 100 wt % some 2-5 wt % of salmiac. Then, produced mix is laid in container made of container of refractory steel with fusible gate. Container is heated to 1050-1100°C and cured thereat for 4-6 hours. Container is cooled down and broken down. Chips are removed by magnetic separation, screed and pelletised. Then, they are smelted in arc furnace and cast to semi-finished ingots. Said semi-finished ingots can be used for production of steels "20ХН2М" and "20Н2М".;EFFECT: extraction of nickel from dump converter slag.;2 cl, 2 tbl