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Method for treating valuable metal sulfide concentrate with oxygen pressure

A technology for valuable metals and sulfide concentrates, applied in the field of hydrometallurgy, can solve the problems of low direct yield of ferronickel, long process flow, complex procedures, etc., achieve high leaching rate of valuable metals, reliable process, and wide application range wide effect

Active Publication Date: 2022-07-26
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the ferronickel refining process adopted by large-scale ferronickel smelters at home and abroad is generally desulfurized in the electric furnace and then transferred to the converter for dephosphorization, so the process is complicated, the energy consumption is high, and the direct recovery rate of ferronickel is low, and various The removal of impurities needs to be carried out step by step, the process is long and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Raw material: The composition of copper sulfide ore is shown in Table 1:

[0029] Table 1

[0030] element Cu Fe S copper sulfide ore 1 3.0％ 4.4％ 5.0％ Copper sulfide ore 2 20.2％ 12.7％ 24.6％

[0031] 1. Use copper sulfide ore 1 as raw material

[0032] The pressure treatment temperature is 180℃, the corresponding kettle pressure is 1.2MPa, the oxygen partial pressure is about 1.0MPa, the calcium hydroxide / copper molar ratio is 0.5, the pressure treatment time is 0.5h, the normal pressure treatment time is 0.5h, and the normal pressure treatment temperature is 35℃ , the endpoint pH is 0.5. The metal leaching rate is as follows in Table 2:

[0033] Table 2

[0034] element Cu Fe leaching rate 95％ 2.5％

[0035] The pressure treatment temperature is 210℃, the corresponding kettle pressure is 2.8MPa, the oxygen partial pressure is 0.8MPa, the calcium hydroxide / copper molar ratio is 2.5, the pressure treatment time...

Embodiment 2

[0046] Raw material: Nickel sulfide ore composition is shown in Table 6:

[0047] Table 6

[0048] element Ni Fe Nickel Sulfide Ore 1 15.0％ 1.4％

[0049] Using nickel sulfide ore 1 as raw material

[0050] The pressure treatment temperature is 150℃, the corresponding kettle pressure is 1.4-1.5MPa, the oxygen partial pressure is about 0.5MPa, the calcium hydroxide / nickel molar ratio is 2.2, the pressure treatment time is 2.0h, the normal pressure treatment time is 1.5h, and the normal pressure treatment temperature 80°C, endpoint pH 1.6. The metal leaching rate is shown in Table 7:

[0051] Table 7

[0052] element Ni Fe leaching rate 95％ 2.5％

[0053] The pressure treatment temperature is 170°C, the corresponding kettle pressure is 3.0MPa, the oxygen partial pressure is 1.0MPa, the calcium hydroxide / nickel molar ratio is 3.8, the pressure treatment time is 2.5h, the normal pressure treatment time is 1.5h, and the normal pressu...

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Abstract

The invention discloses a method for treating valuable metal sulfide concentrate with oxygen pressure. The method includes the following steps: S1, adding an alkaline reagent to the pressurizing device, the oxygen partial pressure in the pressurizing device is 0.3-1.0Mpa, and performing oxygen pressure treatment on the valuable metal sulfide concentrate under the condition of 120-250°C 0.5~3h, the alkaline reagent is sodium hydroxide or potassium hydroxide; S2, after the oxygen pressure treatment, the valuable metal sulfide concentrate pulp is obtained, the valuable metal sulfide concentrate pulp is filtered, and the filtrate is electrolyzed to recover sulfuric acid and alkali , the filter cake is subjected to atmospheric pressure sulfuric acid leaching, and then filtered to obtain the leaching solution containing valence metals and the leaching slag containing valence metals. The process has the advantages of high leaching rate of valuable metals, low energy consumption, wide adaptability of raw materials, reliable process, high degree of automation, and low investment.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular, to a method for treating valuable metal sulfide concentrate with oxygen pressure. Background technique [0002] Valuable metals refer to other metals that have recycling value in the raw materials for metal extraction, in addition to the main metal. In the smelting raw materials of non-ferrous heavy metals, these valuable metals are mostly precious metals and rare metals. It is often recovered from the slag and soot produced during the smelting of the main metal. Generally speaking, whether a certain metal has recycling value depends on the use value of the metal, the cost of recycling and its commodity price. For example, before the rise of the semiconductor industry, the recycling value of germanium in lead-zinc ore is not high. Large, but after the 1950s it became a very valuable metal for recycling. Some heavy metal minerals have low main metal content and may not ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/12C22B3/08C25B1/16C25B1/22C22B15/00C22B23/00
CPCC22B3/12C22B3/08C25B1/16C25B1/22C22B15/0071C22B15/008C22B23/043C22B23/0446Y02P10/20
Inventor 孙宁磊丁剑曹敏李诺彭建华
Owner CHINA ENFI ENGINEERING CORPORATION
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