Combined leaching process of copper nickel coarse grain alloy and copper nickel fine grain alloy
A combined leaching and fine particle technology, applied in the direction of improving process efficiency, can solve the problems of serious environmental pollution, difficult to handle, and large metal loss, and achieve the effect of avoiding environmental pollution and improving recovery rate
Active Publication Date: 2011-03-09
CHINA ENFI ENGINEERING CORPORATION
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Problems solved by technology
[0004] In fact, the vulcanization process of the primary alloy not only has a large metal loss and consumes a lot of energy, but also produces a large amount of SO 2 The flue gas is difficult to deal with, causing serious environmental pollution and poor working conditions
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Embodiment Construction
[0018] Coarse-grained alloys and fine-grained alloys are leached separately. The advantage of this method is that a solution with relatively high copper and nickel ratios can be obtained.
[0019] 1. The leaching process of fine-grained alloy and coarse-grained alloy is described as follows:
[0020] Use the pressurized leaching solution containing sulfuric acid and copper ions and the secondary leaching solution of about 70% to leach fine-grained alloys, dissolve nickel, iron and cobalt, and precipitate copper ions to obtain Ni>80g / l, Cu2 SO 4 The 2 SO 4 <10g / l aqueous solution as leaching agent. The leaching solution is all returned to the first stage of leaching, and the leaching residue is relatively small, which can be used as a raw material for extracting precious metals. In order to speed up the leaching speed, oxygen is used as an oxidant during leaching.
[0021] The leaching agent used in the primary leaching of coarse-grained alloys is the decoppered solution pr...
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Abstract
The invention relates to a nickel-copper coarse-grained alloy and a combined leaching technology for the nickel-copper coarse-grained alloy. The combined leaching technology for the nickel-copper coarse-grained alloy can improve the leaching efficiency and the separation effect of copper, nickel and cobalt in the alloy and the recovery rate of noble metals in leaching slag, and avoid the environmental pollution brought by the vulcanization technology. The combined leaching technology for the nickel-copper coarse-grained alloy comprises the sectional leaching means of the coarse-grained alloy and the sectional leaching means of a fine-grained alloy, wherein the sectional leaching means of the coarse-grained alloy comprises primary leaching of coarse grains and secondary leaching of the coarse grains which are performed in turn; primary leaching slag of the coarse grains is taken as a raw material for the secondary leaching of the coarse grains, and secondary leaching slag of the coarsegrains is used as a raw material for extracting the noble metals; the sectional leaching means of the fine-grained alloy comprises primary leaching of fine grains, secondary leaching of the fine grains and pressure leaching of the fine grains; primary leaching slag of the fine grains is taken as a raw material for the secondary leaching of the fine grains, secondary leaching slag of the fine grains is taken as a raw material for the pressure leaching of the fine grains, and pressure leaching slag of the fine grains is taken as a raw material for extracting the noble metals; and one part of lixivium of the secondary leaching of the fine grains is returned back to a leaching agent of the primary leaching of the coarse grains.
Description
technical field [0001] The invention relates to an acid leaching treatment process for copper-nickel sulfide minerals, which belongs to a process technology for wet treatment of coarse-grained alloys and fine-grained alloys in high-sulfur grinding and floating intermediate products, especially a copper-nickel coarse-grained alloy and Combined leaching process for copper-nickel fine-grained alloys. Background technique [0002] Copper-nickel sulfide ore For copper-nickel sulfide ore with precious metals such as platinum, palladium, gold, rhodium, iridium, osmium, ruthenium, etc., it is extremely important to adopt advanced and applicable technological processes to recover these precious metals. In a copper-nickel sulfide ore in my country, the output of platinum group metals accounts for more than 85% of the national output. In the existing precious metal recovery methods, the alloy vulcanization smelting process is adopted, which not only causes the loss of precious metals,...
Claims
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IPC IPC(8): C22B3/04C22B3/08
CPCY02P10/20
Inventor 顾凌霄王魁珽
Owner CHINA ENFI ENGINEERING CORPORATION