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Molybdenum ore leaching residue comprehensive utilization process

A technology for leaching slag and molybdenum ore, which is applied to the improvement of process efficiency, silicate, ferric sulfate, etc., and can solve the problems of many impurity removal steps, multiple types of impurity removers, and environmental threats

Active Publication Date: 2021-05-25
成都虹波钼业有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of method has long process and low yield, and cannot form relatively pure molybdenum-containing products; leaching ammonia leaching slag under acidic conditions, recovery of molybdenum requires many impurity removal steps and many types of impurity removers are added, and the waste water produced is high in ammonia nitrogen; the most critical The above-mentioned methods only recover the molybdenum in the slag, and the metal resources other than molybdenum have not been effectively utilized, and even pose a threat to the environment

Method used

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  • Molybdenum ore leaching residue comprehensive utilization process
  • Molybdenum ore leaching residue comprehensive utilization process
  • Molybdenum ore leaching residue comprehensive utilization process

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Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, the main metal components of molybdenum ore leaching slag are: Mo: 1.2%, iron content 18.1%, copper content 4.5%, and Ca 2.5%.

[0031] refer to figure 1 , the main process is as follows:

[0032] 1. Pickling

[0033] 1. Primary acid leaching: mix the molybdenum ore leaching slag with the secondary acid leaching filtrate according to the solid-liquid ratio of 1:8, add concentrated sulfuric acid (Wt98%) according to the hydrochloric acid concentration of 100g / l, heat to 80°C, and use compressed air The pressure is 0.15MPa and passed into the leaching tank, after 2.5 hours of reaction, it is filtered, the filtrate enters the extraction step, and the first-stage acid leaching residue enters the second-stage acid leaching.

[0034] 2. Secondary acid leaching: the primary acid leaching residue and ferrous sulfate filter mother liquor are made into pulp according to the solid-to-liquid ratio of 1:15, and concentrated sulfuric acid (Wt98%) is added accord...

Embodiment 2

[0041] In this embodiment, the main metal components of molybdenum ore leaching slag are: Mo: 0.8%, iron content 23.4%, copper content 3.7%, and Ca 1.5%.

[0042] refer to figure 1 , the main process is as follows:

[0043] 1. Pickling

[0044] 1. Primary acid leaching: mix molybdenum ore leaching slag with secondary acid leaching filtrate according to the solid-to-liquid ratio of 1:20, add concentrated sulfuric acid (Wt98%) according to the hydrochloric acid concentration of 120g / l, heat to 90°C, and use compressed air The pressure of 0.2MPa is passed into the leaching tank, and it is filtered after reacting for 2 hours. The primary acid leaching filtrate enters the extraction step, and the primary acid leaching residue enters the secondary acid leaching.

[0045] 2. Secondary acid leaching: the primary acid leaching residue and ferrous sulfate filtered mother liquor are made into pulp according to the solid-to-liquid ratio of 1:20, and concentrated sulfuric acid (Wt98%) is...

Embodiment 3

[0052] In this embodiment, the main metal components of molybdenum ore leaching slag are: Mo: 8%, iron content 25%, copper content 0.5%, and Ca 5%.

[0053] refer to figure 1 , the main process is as follows:

[0054] 1. Pickling

[0055] 1. Primary acid leaching: mix molybdenum ore leaching slag with industrial water or secondary acid leaching filtrate according to the solid-to-liquid ratio of 1:10, add concentrated sulfuric acid (Wt98%) according to the hydrochloric acid concentration of 80g / l, heat to 90°C, Use compressed air with a pressure of 0.3 MPa to pass into the leaching tank, react for 5 hours and then filter, the filtrate enters the extraction step, and the first-stage acid leaching residue enters the second-stage acid leaching.

[0056] 2. Secondary acid leaching: the primary acid leaching residue and ferrous sulfate filtered mother liquor are made into pulp according to the solid-to-liquid ratio of 1:8, and concentrated sulfuric acid (Wt98%) is added according ...

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Abstract

The invention provides a molybdenum ore leaching residue comprehensive utilization process. According to the molybdenum ore leaching residue comprehensive utilization process, sulfuric acid is used as a leaching agent, a two-stage countercurrent leaching mode is adopted, the fact that the leaching rates of molybdenum and iron are both higher than 98% is realized, the leaching rate of copper is higher than 75%, and a wollastonite byproduct is produced; molybdenum is extracted from an acid leaching solution by extracting, and reverse extraction with ammonia water is performed to finally obtain a pure ammonium tetramolybdate or ammonium dimolybdate product; and iron and copper in raffinate are separated to respectively obtain elemental copper and ferrous sulfate. By means of the molybdenum ore leaching residue comprehensive utilization process, waste residue cyclic utilization is realized, existing resources are further recycled, pollution of valuable metal to the environment is also avoided, and the molybdenum ore leaching residue comprehensive utilization process is safer and more environmentally friendly; and meanwhile, the molybdenum ore leaching residue comprehensive utilization process is simple in principle, reasonable in process, high in yield and product grade and low in cost.

Description

technical field [0001] The invention belongs to the technical field of molybdenum slag treatment and relates to a process for comprehensive utilization of molybdenum ore leaching slag. Background technique [0002] Although molybdenum ore leaching slag is a kind of industrial waste, it has great value. It contains a large amount of iron and copper elements. According to the data, the content of iron in molybdenum calcine is 6% to 18%, and the content of copper is 0.3% to 4%. Finally, iron and copper all enter the leaching slag. If the iron and copper are not recycled, a large amount of mineral resources will be wasted. Accumulation of leaching slag will not only occupy a large amount of land, but also seriously damage the ecological environment of our country, causing serious pollution mitigation, and has certain safety hazards; comprehensive recycling and utilization of molybdenum ore leaching slag, all valuable metals in it will be recovered and processed to form Valuable...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/40C22B34/34C22B15/00C01B33/24C01G49/14
CPCC22B7/007C22B34/34C22B15/0071C01B33/24C01G49/14Y02P10/20
Inventor 刘锦锐刘阳任倩杨军杨伟高志强侯发
Owner 成都虹波钼业有限责任公司
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