Low-energy-consumption environmentally-friendly magnetized calcination tailing cooling processing system

Abstract

The invention provides a low-energy-consumption environmentally-friendly magnetized calcination tailing cooling processing system which comprises a closed tailing cooling tank. The cooling processing system is characterized in that the closed tailing cooling tank is vertically arranged, the upper portion of the closed tailing cooling tank is provided with a material inlet, the lower portion of the closed tailing cooling tank is provided with a material outlet, and the tank is internally and vertically provided with a water circulating spiral conveying pipe; the water circulating spiral conveying pipe comprises a water circulating spiral cavity and a material spiral sliding channel, the material spiral sliding channel is located on the upper surface of the water circulating spiral cavity and is spiral downwards together with the water circulating spiral conveying pipe; and the water circulating spiral cavity comprises a water inlet and a water outlet.

Description

technical field [0001] The invention relates to a low energy consumption and environment-friendly cooling treatment system for magnetized roasting tailings. Background technique [0002] Tailings are usually one of the largest solid wastes produced in mineral processing. Most of the tailings enter the tailings pond or fill, and are also the largest source of pollution in the mineral processing industry. Billions of tons of tailings are discharged in the tailings in China every year. In the tailings produced by metal ore dressing, most of the iron oxide and other metal elements are not effectively recycled and directly discharged into the tailings pool or filling; and if the development and utilization of a large amount of long-term accumulation Solid waste tailings can not only "turn waste into treasure", but also effectively alleviate the pressure on resources and the environment, and can release a large amount of land resources occupied by tailings. Most of the tailings in...

AI Technical Summary

Problems solved by technology

[0003] 1. During the cooling process, a large amount of water will become aerosol, and the tailings and fine-grained powder ore will become dust and aerosol mixed into the air because the particle size is too fine, and it cannot be carried out in a confined space because the aerosol contains too much water. Effective dust removal treatment, aerosol and a large amount of dust will cause a bad working environment; at the same time, these aerosol mixed with dust is a huge polluted air;

[0004] 2. Because the particle size of the tailings and fine-grained ore is too fine, if it is directly cooled by water, it will cause difficulty in dehydrating the cooled material, and there will be a large amount of floating matter in the sewage. In addition, after cooling one ton of magnetized roasting The ore usually needs about 7-12 tons of water, and this part of water is difficult to recycle and use directly, causing a lot of waste of water resources. Some liquid water is also mixed with heavy metals, and it needs to be treated before it can be reused or discharged. Cost extremely high

[0005] 3. A large amount of heat energy carried by the tailings enters the water directly. This part of the heat energy cannot be effectively recycled because the water contains a large amount of mud and minerals. It also needs to be treated with sewage and discharged after cooling, resulting in great waste.

[0007] 1. There must be a power device (ore lifting and conveying device) to send the tailings into the cooling barrel;

[0008] 2. Since the cooling area is limited to the inner wall of the barrel, and the tailings are hoisted by the hoisting conveying device, they are in contact with the wall of the cooling barrel. In the middle of the cooling process, due to the limited contact area between the wall of the cooling barrel and the tailings, the cooling is uneven, and part of the tailings Insufficient ore cooling, after leaving the kiln, secondary oxidation occurs due to this part of high-temperature tailings contacting air

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