Pretreatment method of lead-containing high-grade gold concentration powder

Abstract

The invention relates to a pretreatment method of lead-containing high-grade gold concentration powder. The pretreatment method of the lead-containing high-grade gold concentration powder comprises the following steps of 1, drying, specifically, the lead-containing high-grade gold concentration powder containing 10%-15% of water is put into a drying oven at a set temperature, and drying is conducted until no water exists; 2, adding lead, specifically, a lead sheath which a weight ratio of the lead sheath to the gold concentration powder is 1 to 1 is prepared, and the lead sheath is tightly wrapped around the dried gold concentration powder; 3, preheating a cupel, specifically, the cupel is put into a high-temperature furnace for preheating; 4, sintering, specifically, the gold concentration powder wrapped the lead sheath is put into the preheated cupel, and after the lead sheath and the gold concentration powder are completely molten, the temperature of the high-temperature furnace isreduced to 1020 DEG C, and oxygen-enriched sintering is conducted; and 5, when the surface of a gold block in the cupel is glossy and no fluid exists on the surface, the alloyed gold is taken out. According to the pretreatment method, effective separation of the crude lead and precious metal can be achieved, the gold content of the sintered gold block reaches 85% or above, further refining can bedirectly conducted, and the ground cupel can return to a grinding and floating system of a dressing plant to be treated.

Description

technical field [0001] The invention relates to the technical field of gold fine powder treatment, in particular to a pretreatment method for lead-containing high-grade gold fine powder. Background technique [0002] At present, the chemical pretreatment methods of flux batching to adjust slag and acid boiling to remove lead are generally used for lead-containing high-grade gold fine powder. [0003] The flux batching slag adjustment method has the following problems: [0004] 1. There are many procedures and time-consuming, and one operation takes 13 hours; [0005] 2. The cost is expensive. The material cost required for 100Kg raw material pretreatment is 12,000 yuan, the required power cost is 900 yuan, and the total cost is 12,900 yuan; [0006] 3. The labor cost is high, and one operation requires 4-6 people; [0007] 4. The impact on environmental protection is relatively large, and difficult to handle sulfur-containing lead-containing waste gas and acid-containing ...

AI Technical Summary

Problems solved by technology

[0004] 1. There are many procedures and time-consuming, and one operation takes 13 hours;

[0005] 2. The cost is expensive. The material cost required for 100Kg raw material pretreatment is 12,000 yuan, the required power cost is 900 yuan, and the total cost is 12,900 yuan;

[0006] 3. The labor cost is high, and one operation requires 4-6 people;

[0007] 4. The impact on environmental protection is relatively large, and difficult to handle sulfur-containing lead-containing waste gas and acid-containing wastewater are generated during the operation process;

[0008] 5. During the pretreatment process, the loss of gold metal is relatively large. With the waste gas and waste water, a part of the metal content will be lost, and it is difficult to recycle. After the waste residue generated after pretreatment is returned to the beneficiation system, it is difficult to completely recycle due to the addition of chemicals. ;

[0009] 6. The post-processing time is long. The lead block formed after the pretreatment of the flux batching and slag adjustment method needs to be splashed with beads, acid boiled and other operations to obtain the required alloy gold.

[0011] 1. There are many procedures and time-consuming, and one operation takes 11 hours;

[0012] 2. The cost is expensive. The material cost required for 100Kg raw material pretreatment is 7,000 yuan, the required power cost is 500 yuan, and the total cost is 7,500 yuan;

[0013] 3. The labor cost is high, and one operation requires 3 to 5 people;

[0014] 4. The impact on environmental protection is great, and difficult to handle sulfur-containing lead-containing waste gas and acid-containing wastewater are generated during the operation;

[0015] 5. During the pretreatment process, the loss of gold metal is relatively large, and a part of the metal amount will be lost along with the waste gas and wastewater, and it is difficult to recycle;

[0016] 6. The post-processing time is long, and the gold powder formed after the pretreatment of acid boiling to remove lead requires frit and other operations to obtain the required alloy gold

[0017] Both of the above two methods have the problems of many procedures, high cost, high labor cost, great impact on environmental protection, large loss of gold metal in the pretreatment process, and long post-processing time.

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