Novel technology for roasting cobalt sulfide copper ore through sulfating

Abstract

The invention relates to the field of roasting of cobalt sulfide copper ores, and provides a novel technology for roasting a cobalt sulfide copper ore through sulfating. The cobalt sulfide copper orepasses through a crushing machine, a vibrating screen, a bucket-type elevator, a furnace top material bin, an sulfating roaster and drum-type water cooling to obtain a finished calcine material, air is sent into the sulfating roaster through a Roots blower, smoke dust containing SO2 of the sulfating roaster sequentially passes through a cyclone dust collector and an electric dust collector and enters a sulfuric acid system for acid making. The smoke dust removed by the cyclone dust collector and the electric dust collector is spirally conveyed to the drum-type water cooling stage, and the drum-type water cooling stage is provided with an overflow opening for discharging calcine. According to the novel technology for roasting the cobalt sulfide copper ore through sulfating, the problems ofthe sulfating roasting condition of the sulfating roaster and the enter-furnace grain size of the cobalt sulfide copper ore are solved, the harm of the smoke dust containing SO2 is controlled, and thus the finished calcine quality, and the leaching rate, being greater than or equal to 96%, of copper and cobalt in the calcine material are ensured.

Description

technical field [0001] The invention relates to the field of cobalt-copper sulfide ore roasting, in particular to a new process for sulfated cobalt-copper sulfide ore roasting. Background technique [0002] In cobalt-copper metallurgy, the pyrotechnic process is mature and the operation is stable, but the investment is large, and matte-making smelting-blowing process is generally used, and SO 2 Smoke problem. Wet process in removing SO 2 There are certain advantages in smoke hazards and expanding the utilization range of copper resources, so more and more attention has been paid to it. The cobalt-copper hydro-smelting process at home and abroad has been successfully used to treat cobalt-copper concentrate and waste rock piles. In the research stage. Cobalt-copper sulfide ore, which is extremely difficult to treat in hydrometallurgy, in acidic FeCl 3 and acidic Fe 2 (SO 4 ) 3 There are many reports on the kinetics of leaching in solution, but as an industrial method f...

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Problems solved by technology

The cobalt-copper hydro-smelting process at home and abroad has been successfully used to treat cobalt-copper concentrate and waste rock piles. in research phase

Cobalt-copper sulfide ore, which is extremely difficult to treat in hydrometallurgy, in acidic FeCl 3 and acidic Fe 2 (SO 4 ) 3 There are many reports on the kinetics of leaching in solution, but as an industrial method for treating sulfide ore, its disadvantage is that the process is long, a large amount of iron enters the solution, iron removal or regeneration of FeCl 3 difficult, poor

Generally, the traditional hydrolysis selective precipitation method is adopted. Iron and sulfur exist in the form of hydroxide colloid, which is difficult to filter, and the colloid contains a lot of copper ions in the mother liquor, so it is not easy to wash.

Although flocculants can be used to coagulate colloids, it is difficult to be widely used in industry due to high cost.

Even the microwave leaching of cobalt-copper ore is not ideal, although an appropriate amount of oxidant MnO is added during the leaching process. 2 , with H 2 SO 4 Solution leaching, avoiding the Fe(OH) in the leaching solution 3 ·nH 2 The generation of O colloid, but the number of leaching is more than 7 times, so the industrial application will also become a practical problem

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