Normal temperature and normal pressure regeneration method for activated carbon for gold extraction

A technology of activated carbon and normal pressure, which is applied in the field of normal temperature and normal pressure regeneration of activated carbon for gold extraction, which can solve the problems of difficulty in forming the connection of the production process, secondary pollution, high energy consumption, etc., so as to improve the production efficiency of gold absorption, save energy and invest The effect of cost reduction

Active Publication Date: 2013-09-18
辽宁排山楼黄金矿业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the thermal regeneration method has high energy consumption and large carbon loss. At the same time, this regeneration method uses high-temperature vaporization to degrade the organic pollutants adsorbed by activated carbon, and the resulting exhaust gas emissions will cause secondary pollution; and the thermal regeneration method belongs to " "Dry" regeneration process, it is difficult to form a connection with the "wet" hydraulic continuous transportation of gold extraction activated carbon produced by gold

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  • Normal temperature and normal pressure regeneration method for activated carbon for gold extraction
  • Normal temperature and normal pressure regeneration method for activated carbon for gold extraction

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Embodiment 1

[0028] Embodiment 1: Carry out two-step regeneration of "oxidation-pickling" to gold-extracting poor carbon with an iodine value of 67%:

[0029] In this embodiment, both the oxidation process water and the rinsing water are tap water, and the activated carbon for gold extraction to be regenerated is a gold-extracting depleted carbon with an iodine value of 67% after repeated gold extraction. Its specific process is as figure 1 As shown, at first the gold-extracting poor carbon with an iodine value of 67% is discharged into the main reaction tank, the control module opens the check valve on the connecting pipeline between the auxiliary water tank and the main reaction tank, and injects tap water into the main reaction tank through the auxiliary water tank. The gold-extracting charcoal is submerged, and the one-way valve is closed after ensuring that the mass ratio of the gold-extracting charcoal to the tap water in the main reaction tank is 1:2. Start the ozone generator to c...

Embodiment 2

[0032] Example 2: Carry out three-step regeneration of "oxidation-pickling-electrochemical" on the gold-extracting depleted carbon with an iodine value of 72%

[0033] In this embodiment, tap water at normal temperature is used as the oxidation process water, and warm water at 60°C is used as the rinsing water; the activated carbon for gold extraction to be regenerated is gold-extracting depleted carbon with an iodine value of 72% after repeated gold extraction. At the same time, the "electrochemical treatment" step is added in this embodiment, thus, an electrochemical treatment tank is added to the system, and the electrochemical treatment tank is connected to the main reaction tank.

[0034] Its specific process is as figure 2As shown, at first the gold-extracting poor carbon with an iodine value of 72% is discharged into the main reaction tank, and tap water is injected into the main reaction tank through the auxiliary water tank to submerge the gold-extracting poor carbon...

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Abstract

The invention discloses a normal temperature and normal pressure regeneration method for activated carbon for gold extraction. According to the method, the problem of low economical property of a conventional high-temperature heat-method activated carbon regeneration reactor can be solved; high-efficiency activated carbon regeneration can be realized at normal temperature and normal pressure with low cost according to an advanced oxidization and chemical elution theory. The normal temperature and normal pressure regeneration method comprises the specific steps of: discharging the activated carbon for gold extraction to be regenerated into a reactor, and then injecting running water into the reactor; oxidizing the activated carbon in the reactor by injecting ozone into the reactor; after the oxidation is finished, discharging oxidation process water out of the reactor; chemically eluting the activated carbon in the reactor by an acidic eluting solution; after the chemical elution is finished, discharging the acidic eluting solution out of the reactor; and injecting running water into the reactor to rinse the activated carbon in the reactor, thus obtaining regenerated carbon.

Description

technical field [0001] The invention relates to a method for regenerating activated carbon, in particular to a method for regenerating activated carbon for gold extraction at normal temperature and pressure. Background technique [0002] The carbon slurry method is one of the main processes in the production process of the gold industry at home and abroad. The so-called carbon slurry method refers to the use of activated carbon to extract gold from the pulp in the leachate treatment operation of chemical beneficiation. As the only adsorption carrier for precious metals in the process of gold extraction, activated carbon has its own quality factor and repeatability of "adsorption-desorption", which is directly related to the cost and efficiency of gold production. [0003] At present, the gold industry generally adopts the traditional thermal regeneration method to restore the activity of activated carbon whose adsorption activity decreases after repeated gold extraction to e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/34
Inventor 田行俊戴斌崔继红王荣湖周志远梁国海
Owner 辽宁排山楼黄金矿业有限责任公司
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