SU386018A1 - - Google Patents

Description

METHOD OF SLOOTING SLAGS OF RESTORING SULPHIDING FUSION

one

The invention relates: to the field of non-ferrous metallurgy and, in particular, to the methods of depletion of slag from non-ferrous metallurgy;

The known method of depletion of slags of non-ferrous metallurgy with a sulphide-reducing smelting using a sulphidizer (pyrite), coke and calcium (calcium oxide) compounds, 1CO: Conducted with high sulphidizer consumption.

P, re | The added method is characterized in that the sulphidization, coking of the calcium compound is introduced into the slag at a temperature of 1150-1350 ° C with a weight ratio of (1-2): (0.2-0.4): 1, that allows you to reduce the consumption of sulfidization 1.5-2, pa3ai. Reducing the consumption of pyrites and increasing the degree of utilization; sulfur does not reach by means of treating the slag with a mixture containing py, rit, reducing agent, and calcium carbonate. At THIS .M calcium carbonate IB Presence, mine dissociation stage, goes into: sulphide, calium, and bonds in a part of volatile sulfur, which is not attained by slag processing of the indicated components. This process is drying, eating: it is 1 s without additional heat consumption in the air gap of the temperature and the ratios of the reactants.

The depletion of slag is accomplished by loading on to; the upper part of a slag melt having a temperature of 1150–1350 ° C, a pre-mixed mixture of the specified components. The method allows to increase the degree of utilization of pyrite sulfur to 70-75%. Compared to calcium oxide, the cost of carbonate is lower. The possibility of using various industrial wastes containing marble, limestone, dolomite, etc., reduces the cost of depletion of varnishes.

Example. An envelope, a nickel nickel production slag, containing 0.5-0.8% Ni and 0.2-0.4% Co, is depleted in an electric furnace (reducer); the driver) is a sulphidizing mixture consisting of lrith, screening, vol. razobuegos when crushing marble and coke. The size of the components is minus 20 mm, the weight ratio (1-2): 1: (0.25-0.4). At a mix consumption

15-20% by weight of slag, the degree of utilization of pyrite sulfur reaches 70-75%, the pyrite consumption is reduced by IB 1.5-2 times. Metal recovery. In matte is: nickel - 96-98%, cobalt -75-80%. At the same time

electricity consumption is reduced by 5.0-7.0% and coke by 10-20%. 34

The subject matter of the invention is that, in order to reduce the amount of slag depletion, reducing and calcium compounds are introduced into the slag three by sulphidizing smelting using a sulf temperature of 1150-1350 ° C., By weight of co-oxidizers, coke and calcium compounds, 5 wearing (1 -2): (0,2-0,4): 1.

S & SOiS

sulfidisatom consumption, sulfidization, coc