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A method of using cement kiln to co-process gold tailings and recover gold

A gold tailings and co-processing technology, applied in the direction of cement production, process efficiency improvement, etc., can solve the problem of less gold recovery, and achieve the effect of reducing the total amount of pollutant discharge

Active Publication Date: 2019-12-13
金圆环保股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hazardous waste materials for co-processing are mostly high-calorific organic wastes such as waste oil, waste emulsifier, and waste organic solvents, as well as inorganic mineral materials such as waste incineration ash, sludge, and silt, which involve the recovery of gold in the co-processing of gold tailings. less technical

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  • A method of using cement kiln to co-process gold tailings and recover gold

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Experimental program
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Effect test

Embodiment 1

[0024] Such as figure 1 Shown, a kind of method utilizing cement kiln co-processing gold tailings and recovering gold, comprises the following steps:

[0025] A. Crushing: Transport the gold tailings containing cyanide to the factory. After the ingredients are calculated, they are lifted to the roller shale crusher platform by bucket elevator, and the gold tailings and shale are mixed according to the mass ratio of 2~5. : 1, mixed, rolled and crushed to 20-50mm, the mixture of crushed gold tailings and shale enters the stockyard, and the material 1 is obtained.

[0026] B. Heat treatment: The material 1 is sent to the heat treatment equipment by the belt conveying equipment; the heat treatment equipment is a double-layer cylindrical steel structure, including an inner ring and an outer ring, and the outer ring is lined with fireproof materials. The double-layer cylindrical heat treatment equipment The aspect ratio of the outer ring is 15~30:1, the aspect ratio of the inner ri...

Embodiment 2

[0033] This embodiment is to optimize parameters on the basis of embodiment 1.

[0034]In a cement plant in Qinghai, the gold tailings containing cyanide were transported to the factory, after the ingredients were calculated, they were lifted to the platform of the roller shale crusher through bucket elevators, and the gold tailings and shale were mixed at a ratio of 3:1 After mixing, the mixture is rolled and crushed to 25 mm, and the mixture of crushed gold tailings and shale enters the stockyard, and the mixture in the stockyard is sent to the heat treatment equipment by belt conveyor equipment. The heat treatment equipment is a double-layer cylindrical steel structure, and the outermost layer is lined with fireproof materials. The aspect ratio of the outer ring of the double-layer cylindrical heat treatment equipment is 15:1, the aspect ratio of the inner ring is 8:1, and the inclination angle is 3 degrees. The diameter of the outer ring is 5 meters, the diameter of the i...

Embodiment 3

[0036] This embodiment is to optimize parameters on the basis of embodiment 1.

[0037] In a cement factory in Xinjiang, the gold tailings containing cyanide were transported to the factory. After the ingredients were calculated, they were lifted to the roller shale crusher platform by bucket elevators, and the gold tailings and shale were mixed at a ratio of 2:1. After mixing, the mixture is rolled and crushed to 30 mm, and the mixture of crushed gold tailings and shale enters the stockyard, and is sent to the heat treatment equipment by belt conveyor equipment. The heat treatment equipment is a double-layer cylindrical steel structure, and the outermost layer is lined with fireproof materials. The aspect ratio of the outer ring of the double-layer cylindrical heat treatment equipment is 30:1, the aspect ratio of the inner ring is 10:1, and the inclination angle is 2 degrees. The diameter of the outer ring is 10 meters, the diameter of the inner ring is 5 meters, and the inn...

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Abstract

The invention discloses a method of utilizing a cement kiln to co-process gold tailing and recover gold. According to the method, cyanide gold tailing and shale are mixed and grinded, and then the mixture is subjected to a heat treatment; the heat treatment equipment has a dual layer cylindrical steel structure; the top end is provided with a flue, an air inducing pipe is used to introduce hot air with a temperature of 500 to 600 DEG C from the third grade or fourth grade of a cement kiln pre-decomposition system into the outer ring of the heat treatment equipment, at the same time, oxygen is introduced into the heat treatment equipment to carry out a heat treatment; after the heat treatment, the processed material is mixed with raw materials and ball-milled, and gold sand is collected by a pneumatic chute. The provided method utilizes a cement kiln to process gold tailing, produces cement, recovers gold at the same time, solves the problem of waste accumulation in cities, converts wastes into valuable resource, and reduces the discharge total amount of pollutants.

Description

technical field [0001] The invention relates to the field of co-processing of hazardous waste tailings and cement kilns, in particular to a technology for co-processing gold tailings in cement kilns and recovering gold at the same time. Background technique [0002] Cyanide is an important gold leaching agent in the gold industry, and most of the various cyanides involved in the gold smelting industry are inorganic cyanides. Inorganic cyanide is a highly toxic substance, which can be inhaled through the skin, mouth and nose, and is extremely harmful. A large amount of cyanide-containing tailings produced by gold smelting encroach on a large area of ​​land, and there is a risk of water and soil pollution. If the abandoned tailings are not managed properly, major environmental accidents may occur, such as tailings dam failure and landslides. In addition, the construction, maintenance and management of cyanide-containing tailings ponds also need to invest a lot of money. Ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/36C04B7/14C22B7/00C22B11/02
CPCC04B7/14C04B7/36C22B7/001C22B11/023Y02P10/20Y02P40/10
Inventor 李春萍
Owner 金圆环保股份有限公司
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