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Method for treating lead-containing high electrum concentrate

A treatment method, high-silver-gold technology, applied in the treatment of lead-containing high-silver-gold concentrate, the field of high-silver-gold concentrate treatment, can solve the problem of low recovery rate, and achieve the effect of highlighting the substantive characteristics

Active Publication Date: 2012-07-25
SHANDONG HUMON SMELTING
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a kind of processing method of lead-containing high-silver gold concentrate, mainly solve existing direct cyanidation process and have lead sulfide, lead sulfate wrap part gold, silver make recovery rate not high problem

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  • Method for treating lead-containing high electrum concentrate
  • Method for treating lead-containing high electrum concentrate
  • Method for treating lead-containing high electrum concentrate

Examples

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Embodiment 1

[0019] Example 1, see figure 1 , taking one as an example, the multi-element analysis of the mine is as follows: Au: 34.5g / t, Ag: 3860g / t, Cu: 0.19%, S: 33.5%, As: 0.2%, C: 1.37%, Pb: 2.6% ; Adopt the following process steps to process:

[0020] 1. Alkaline immersion pretreatment, adding cyanide reagents as sodium hydroxide and ammonium bicarbonate, after mixing ammonium bicarbonate and sodium hydroxide in a mass ratio of 1:1, adding cyanide barren solution to make a mass percentage of 10 % solution, the addition amount is 3.5-5Kg / T dry ore, added continuously and evenly;

[0021] 2. One-time grading and grinding, the pulp after alkali leaching pretreatment undergoes one-time grading and one-time grinding, and then enters pre-leaching thickening, and after pre-leaching thickening, precious liquid and underflow ore pulp are obtained;

[0022] 3. One-time oxidation to remove lead, add hydrogen peroxide to the dense underflow pulp before leaching, the volume percentage concentr...

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Abstract

The invention discloses a method for treating lead-containing high electrum concentrate. The method comprises the following steps of: alkaline bleaching pretreatment; primary grading; ore grinding; primary oxidation and lead removal; primary leaching; secondary grading; secondary ore grinding; primary dense washing; secondary oxidation and lead removal; second leaching; secondary dense washing; tailings pressing and filtering; pregnant solution replacement and treatment, and the like. The method is characterized in that the cyanidation and recovery rates of gold and silver are furthest improved through changing cyaniding chemicals, i.e. the traditional lime is changed into sodium hydroxide and ammonium bicarbonate, and then hydrogen peroxide as an auxiliary oxidation chemical is used for removing lead sulfide.

Description

Technical field: [0001] The invention relates to the technical field of gold concentrate treatment, in particular to a treatment method for lead-containing high-silver gold concentrate, which is suitable for the treatment of high-silver gold concentrate containing lead ≥ 2%. Background technique: [0002] As we all know, there are generally two processing methods for high-silver gold concentrates, one is the conventional direct cyanidation method, and the other is the roasting cyanidation method. Because the roasting cyanidation method will cause part of the silver to react to form silver silicate in the roaster when treating high-silver gold concentrate, and silver silicate is difficult to be dissolved by cyanide, so the recovery of silver cyanide when roasting cyanide method is used to treat high-silver gold concentrate The rate is much lower than that of the direct cyanidation method, so the high-silver gold concentrate is generally treated with the direct cyanidation met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/04C22B11/08
CPCY02P10/20
Inventor 张俊峰王元邹琳张艳峰钟庆利朱家辉
Owner SHANDONG HUMON SMELTING