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Flotation method for talc-containing molybdenum-zinc ore

A talc-molybdenum and zinc ore technology, applied in flotation, solid separation and other directions, can solve the problems of difficult to achieve selective separation, affecting concentrate grade and smelting product quality, easy entry of talc, etc. Guaranteed grade and recovery rate, and the effect of improving recovery rate

Active Publication Date: 2021-02-26
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In molybdenite, the ore grade of molybdenum is low, the content of talc is high, and the lattice structure of the two is similar (layered structure), both have very good natural buoyancy, it is difficult to achieve selective separation, if the separation effect Poor, talc easily enters the molybdenum concentrate, affecting the grade of the concentrate and the quality of smelted products

Method used

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  • Flotation method for talc-containing molybdenum-zinc ore
  • Flotation method for talc-containing molybdenum-zinc ore
  • Flotation method for talc-containing molybdenum-zinc ore

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Embodiment 1-5

[0033] A flotation study was carried out on a talc-bearing molybdenum-zinc ore in Fujian, in which the main metal minerals were molybdenite, sphalerite and pyrrhotite, the grade of Mo was 0.13%, the grade of Zn was 2.3%, the grade of S was 6.4%, and the rest Metal content is low. The gangue minerals are mainly calcite, quartz and talc, among which the talc content is as high as 7.4%.

[0034] The separation of talc from molybdenite and sphalerite is achieved by using a new combination inhibitor of molybdenite and sphalerite, and the flotation method of re-election of molybdenite is realized by using a hydrogen bond blocker, such as Figure 1-2 As shown, the specific steps are as follows:

[0035] (1) Grinding the raw ore in a mill to -200 mesh accounts for 78% to obtain ore pulp;

[0036] (2) Add Cu to the slurry 2+ , Zn 2+ or Ca 2+ (20-50g / t) for pretreatment of the mineral surface, the treatment time is 3-5min, then add pectin (150-200g / t) as an organic inhibitor, and c...

Embodiment 1

[0050] Comparing Example 1 with Comparative Example 1, it is found that if the organic inhibitors adsorbed on the surface of molybdenite and sphalerite in the talc flotation stage are not treated, their flotation behavior in the subsequent flotation stage will be greatly affected. The flotation recovery rates of molybdenum concentrate and zinc concentrate decreased significantly, being 70.3% and 83.8% respectively. After 30g / t urea was used as a hydrogen bond blocker to destroy the adsorption of organic inhibitors on the mineral surface, the recovery rate was significantly improved.

[0051] Combinations of copper ions with different types of organic inhibitors (pectin, carboxymethylcellulose, polyacrylamide) have different inhibitory effects on talc, molybdenite and sphalerite. The combination of copper ion + carboxymethyl cellulose has a certain inhibitory effect on talc, so the removal rate of talc is as low as 74.5%. The combination of copper ion + pectin and copper ion + ...

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Abstract

The invention discloses a flotation method for talc-containing molybdenum-zinc ore. The flotation method comprises the following steps: (1) grinding ore; (2) with metal ions and an organic inhibitor or an oxidant and an organic inhibitor as a combined inhibitor for molybdenite and sphalerite, carrying out talc flotation operation; (3) carrying out regrinding and reagent removal treatment on talc flotation tailings or desorbing the adsorbed organic inhibitor by using urea and derivatives thereof as hydrogen bond blockers, and carrying out molybdenite flotation operation to obtain a molybdenum concentrate and molybdenum flotation tailings; and (4) conductingzinc flotation operation on the molybdenum flotation tailings so as to obtain a zinc concentrate and tailings. According to the method,the metal ions and the organic inhibitor or the oxidizing agent and the organic inhibitor are adopted as the combined inhibitor for molybdenite and sphalerite; and before molybdenite flotation operation, the organic inhibitor is desorbed through regrinding reagent removal or urea and derivatives thereof are used as hydrogen bond blockers, so cleanness and mineral dispersion on mineral surfaces arepromoted, and subsequent adsorption of a collecting agent is facilitated.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and relates to a flotation method of molybdenum-zinc ore containing talc. Background technique [0002] Molybdenite is the main source of molybdenum and is widely used in chemical, mechanical, material, medical and other industries. During the mineralization process, molybdenite has a complex paragenesis relationship, and is often associated / paragenetic with minerals such as talc and sphalerite, and is also called talc-bearing molybdenum-zinc ore. In molybdenite, the ore grade of molybdenum is low, the content of talc is more, and the lattice structure of the two is similar (layered structure), both have very good natural buoyancy, it is difficult to achieve selective separation, if the separation effect If it is not good, talc can easily enter into the molybdenum concentrate, affecting the grade of the concentrate and the quality of the smelted product. [0003] Organic inhibitors h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018C22B1/00C22B19/02C22B34/34B03D101/06B03D101/02B03D103/04
CPCB03D1/018C22B1/00C22B19/02C22B34/34B03D2201/06B03D2201/02B03D2203/04
Inventor 王长涛刘润清孙伟谢菲菲胡岳华
Owner CENT SOUTH UNIV
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