Process for comprehensive recovery nickel, copper, cobalt, sulfur and magnesium from ore

Abstract

The invention relates to a process for comprehensively reclaiming nickel, copper, cobalt, sulphur and magnesium from ore. The process comprises the following steps that: high magnesium-nickel concentrated ore is selected from the ore by floatation; the high magnesium-nickel concentrated ore is prepared into ore slurry; sulphuric acid and oxygen are added into the ore slurry and are subjected to pressurization and leaching to the ore slurry; the sulphuric acid in the pressurized and leached ore slurry is neutralized; the neutralized ore slurry is subjected to dense washing to produce a leached residue and a leached liquid; secondary concentrated ore is obtained from the leached residue by floatation; iron and copper in the leached liquid are removed; magnesium hydroxide is added into the leached liquid to remove copper so as to deposit and separate nickel hydroxide and cobalt hydroxide off; the leached liquid in which the nickel hydroxide and cobalt hydroxide are separated off is added with ammonia and carbon dioxide so as to deposit and separate magnesium carbonate off; and the deposited magnesium carbonate is subjected to roasting so as to produce magnesia. The method is utilized, discharges no sulfur dioxide, reclaims the non-ferrous metals of Ni, Cu, Co and magnesium in the ore simultaneously, improves the coefficient of recovery of valuable metal compositions in the ore and reduces energy consumption.

Description

technical field [0001] The invention relates to a process for comprehensively recovering nickel, copper, cobalt, sulfur and magnesium from copper-nickel ores, in particular to a process for comprehensively recovering nickel, copper, cobalt, sulfur and magnesium from high-magnesium nickel ores. Background technique [0002] Figure 1-3 Shows the traditional process of producing nickel, copper and other metals with high magnesium concentrate, in which figure 1 Shows the flow from high-magnesium concentrate to the production of copper-nickel alloy, copper concentrate and nickel concentrate, figure 2 shows the process for the production of copper from copper concentrate, image 3 The process for producing nickel from nickel concentrate is shown. The traditional nickel-copper production process uses ores containing nickel (Ni), copper (Cu), cobalt (Co), iron (Fe), sulfur (S), magnesium (Mg) as raw materials, and undergoes roasting, electric furnace smelting and Converter blo...

AI Technical Summary

Problems solved by technology

with low concentrations of SO 2 The flue gas has no recovery value and is directly discharged into the atmosphere, which contains SO 2 The gas pollutes the air and damages human health and plant growth

[0008] In addition, in the above-mentioned traditional process methods, the recovery rate of precious metals such as copper, nickel, cobalt, etc. is low, and energy consumption is large

[0009] At the same time, using the above-mentioned traditional process method, a large amount of impurities Fe and Mg (magnesium) co-existing in the raw material (ore) are discharged to the ground in the state of waste slag and piled up on the ground, which is not effectively recovered, which consumes a large amount of energy and wastes resources.

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