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A beneficiation process for reducing zinc content in lead concentrate

A lead concentrate, zinc content technology, applied in flotation, solid separation, chemical instruments and methods, etc., can solve the problems of inability to use directly, Zn resources are not used, lead smelting, etc. Valuable metal loss risk, the effect of simple process flow

Active Publication Date: 2019-02-26
HUNAN RES INST FOR NONFERROUS METALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem solved by the present invention is that due to the high zinc content in some lead concentrates, Zn>5%, or even>6%, such raw materials cannot be directly used for lead smelting; and after mixing with low Zn lead concentrates Lead smelting, Zn resources are still not utilized in the smelting process

Method used

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  • A beneficiation process for reducing zinc content in lead concentrate
  • A beneficiation process for reducing zinc content in lead concentrate
  • A beneficiation process for reducing zinc content in lead concentrate

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Embodiment

[0045] The raw ore of the lead concentrate processed in this embodiment is a lead-zinc-silver polymetallic mine in Zhalantun, Inner Mongolia. The lead concentrate captured by flotation under the dixanthate collector system contains 9.61% Zn in the concentrate. Containing Pb is 45.91%. The main components are as follows: (in this application, unless otherwise specified, each percentage is a mass percentage)

[0046] Table 1 Analysis results of main chemical elements of flotation lead concentrate

[0047] element

Pb

Zn

Ag

S

Fe

content / %

45.91

9.61

3215g / t

20.52

15.25

[0048] For the above-mentioned lead concentrate, the technological process used in this embodiment is as follows figure 1 As shown, the specific steps are as follows:

[0049] (1) Shaking table gravity separation is carried out to the ore, and the pulp concentration (the ratio of dry ore weight to water) of the feeding ore reselected by the shaking table i...

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Abstract

The invention discloses a mineral processing technology for reducing the content of zinc in lead concentrate. According to the mineral processing technology, the lead concentrate of which the lead content is 35% or higher and the zinc content is 5% or higher serves as fed mineral. The mineral processing technology comprises the following steps that (1) the fed mineral is subjected to gravity separation by a shaking table, and gravity-separation lead concentrate and gravity-separation tailings are obtained; (2) the gravity-separation tailings are subjected to hydraulic cyclone gravity separation and scavenging and divided into overflow ore pulp and underflow ore pulp by a hydraulic cyclone; (3) the overflow ore pulp of the hydraulic cyclone is subjected to zinc inhibition and lead floatation, and floatation lead concentrate and floatation tailings are obtained; and (4) the gravity-separation concentrate and the floatation lead concentrate are mixed to obtain composite lead concentrate. Through the mineral processing technology, the content of the zinc in the lead concentrate can be reduced to be 3% or lower and even lower than 1% from 8-12%.

Description

technical field [0001] The invention relates to a beneficiation process for reducing zinc content in lead concentrate, belonging to the technical field of lead-zinc ore beneficiation. Background technique [0002] Flotation lead concentrate is the main raw material of lead metal. In the world, lead concentrate is mainly smelted by fire method. Zinc will condense on the furnace wall to form furnace knots in the process of fire method lead smelting, which will increase lead in high iron slag. At the same time, the incorporation of Zn will make the lead metal harder and more prone to corrosion. [0003] At present, for the lead concentrate with high Zn content, a large amount of low-Zn lead concentrate is mainly used to mix with it before smelting. Although this method can reduce the Zn content in the lead concentrate of the pyrometallurgy raw material, the Zn resource is still being used. Lost in the lead smelting process. At the same time, due to factors such as low raw mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B7/00B03D1/016B03D101/06B03D101/02
CPCB03B7/00B03D1/016B03D2201/02B03D2201/06
Inventor 骆任魏党生叶从新韦华祖蒋素芳朱永筠欧阳华
Owner HUNAN RES INST FOR NONFERROUS METALS
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