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Pretreated carbonaceous gold concentrate, preparation method thereof and gold extraction method

A gold concentrate and pretreatment technology, applied in the field of pretreatment of carbonaceous gold concentrate and its preparation, can solve the problems of high process energy consumption and high cost, and achieve the effects of improving reaction efficiency, eliminating influence and reducing temperature

Active Publication Date: 2019-11-22
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although high-temperature oxidation roasting can effectively increase the leaching rate of carbonaceous gold ore and is easy to operate, the process consumes a lot of energy, and the removal of SO from the flue gas 2 and As have higher fees

Method used

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  • Pretreated carbonaceous gold concentrate, preparation method thereof and gold extraction method
  • Pretreated carbonaceous gold concentrate, preparation method thereof and gold extraction method
  • Pretreated carbonaceous gold concentrate, preparation method thereof and gold extraction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The gold extraction method of the present embodiment, the steps are as follows:

[0049] 1. Prepare multiple cylindrical ore samples. During preparation, 6g of carbonaceous gold concentrate powder is pressed into a Ф2cm×1cm cylindrical ore sample by using a FYD-40-A desktop powder tablet press at 6MPa, and the cylindrical ore The samples were dried in a blast drying oven at 105°C for 12 hours;

[0050] 2. Put the dried ore sample in the corundum porcelain boat 4 and put it into the quartz tube 5 of the vacuum tube furnace 2. The vacuum degree in the quartz tube 5 is kept at no more than 20Pa, and the vacuum pump is turned on to raise the temperature to 1000°C for the roasting experiment. After the calcination temperature was maintained for 50 minutes, the sample was cooled to room temperature with the furnace, and the rotary vane vacuum pump 10 was turned off. When firing, put every 2 samples in a corundum porcelain boat 4, and fire 4 samples each time, firing 3 times....

Embodiment 2

[0054] The gold extraction method of the present embodiment, the steps are as follows:

[0055] 1. Prepare multiple cylindrical ore samples. During preparation, 6g of carbonaceous gold concentrate powder is pressed into a Ф2cm×1cm cylindrical ore sample by using a FYD-40-A desktop powder tablet press at 6MPa, and the cylindrical ore The samples were dried in a blast drying oven at 105°C for 12 hours;

[0056] 2. Put the dried ore sample in the corundum porcelain boat 4 and put it into the quartz tube 5 of the vacuum tube furnace 2. The vacuum degree in the quartz tube 5 is kept at no more than 20Pa, and the vacuum pump is turned on to raise the temperature to 1100°C for the roasting experiment. After the calcination temperature was maintained for 60 minutes, the sample was cooled to room temperature with the furnace, and the rotary vane vacuum pump 10 was turned off. When firing, put every 2 samples in a corundum porcelain boat 4, and fire 4 samples each time, firing 3 times....

Embodiment 3

[0060] The gold extraction method of the present embodiment, the steps are as follows:

[0061] 1. Prepare multiple cylindrical ore samples. During preparation, 6g of carbonaceous gold concentrate powder is pressed into a Ф2cm×1cm cylindrical ore sample by using a FYD-40-A desktop powder tablet press at 6MPa, and the cylindrical ore The samples were dried in a blast drying oven at 105°C for 12 hours;

[0062] 2. Put the dried ore sample in the corundum porcelain boat 4 and put it into the quartz tube 5 of the vacuum tube furnace 2. The vacuum degree in the quartz tube 5 is kept at no more than 20Pa, and the vacuum pump is turned on to raise the temperature to 1100°C for the roasting experiment. After the calcination temperature was maintained for 70 minutes, the sample was cooled to room temperature with the furnace, and the rotary vane vacuum pump 10 was turned off. When firing, put every 2 samples in a corundum porcelain boat 4, and fire 4 samples each time, firing 3 times....

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Abstract

The invention discloses pretreated carbonaceous gold concentrate, a preparation method thereof and a gold extraction method. The preparation method and gold extraction method comprise the steps that carbonaceous gold concentrate powder is pressed into carbonaceous gold concentrate blocks; the carbonaceous gold concentrate blocks are subjected to roasting in vacuum, organic carbon in the carbonaceous gold concentrate blocks is converted into graphite carbon, and cooling is performed after roasting is completed; the pretreated carbonaceous gold concentrate is ground into pretreated carbonaceousgold concentrate powder; and cyanidation leaching is performed on the pretreated carbonaceous gold concentrate powder. According to the pretreated carbonaceous gold concentrate, the preparation methodthereof and the gold extraction method provided by the invention, a vacuum system is combined with roasting, and the carbonaceous gold concentrate can be effectively pretreated when the vacuum pressure is controlled not to be greater than 20 Pa, the temperature is controlled to be 1000-1200 DEG C and the roasting time is controlled to be 50-90 min; through reaction, the organic carbon with a goldintercepting effect can be converted into the graphite carbon without a gold intercepting effect, the gold intercepting capability of the carbonaceous gold concentrate is weakened, and influences ofthe concentrate on cyanidation gold extraction are eliminated; and gold wrapped with sulphide ore can be further dissociated, a good material basis is provided for cyanidation gold extraction, the gold leaching efficiency is improved, and the leaching duration is shortened.

Description

technical field [0001] The invention belongs to the technical field of carbonaceous gold ore pretreatment in the metallurgical industry, and in particular relates to a pretreatment carbonaceous gold concentrate, a preparation method thereof, and a gold extraction method. Background technique [0002] Carbonaceous gold ore is a kind of gold mine produced in black (carbon-containing) rock series and sedimentary rocks, and it is one of the important gold mines in the world. Since the natural gold embedded in carbonaceous gold deposits has a fine particle size and is easily wrapped by minerals such as sulfide ores, silicates, and carbonates, it is difficult to expose the gold through fine grinding alone, and cannot fully contact the leaching solution; in addition, carbonaceous gold The elemental carbon and organic carbon (a mixture of high molecular hydrocarbons and humic acid organic acids) contained in the ore are easy to absorb dissolved gold cyanide complex ions in the proce...

Claims

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Application Information

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IPC IPC(8): C22B1/24C22B1/02C22B3/04C22B11/08
CPCC22B1/02C22B1/24C22B3/04C22B11/04C22B11/08Y02P10/20
Inventor 宋永辉张辛未尹宁
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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