Method for treating tailing water from mineral processing plant by microwave

A microwave treatment and tailings water technology, applied in the field of tailings water treatment, can solve the problems of catastrophic loss of people's lives and properties in the downstream of the reservoir area, the safety threat of new tailings ponds, and the inability to realize recycling, and achieve the degradation of pollutants. The effect of quick response, solving the shortage of water resources, and quick return of water

Active Publication Date: 2009-03-25
KUNMING IRON & STEEL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, iron ore dressing plants are mostly located on mountains or hillsides where water is scarce. The water consumption of mineral processing is huge, and the loss of water is also extremely alarming. Long-distance pumping water replenishment not only requires a large investment and high cost, but also makes it difficult to provide sufficient water sources. In order to solve the primary problem that restricts mineral processing production, it is imminent to carry out research on the reuse of water resources
Especially after the implementation of the tailings re-processing pr...

Method used

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  • Method for treating tailing water from mineral processing plant by microwave
  • Method for treating tailing water from mineral processing plant by microwave
  • Method for treating tailing water from mineral processing plant by microwave

Examples

Experimental program
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Effect test

Embodiment 1

[0025] The main technical parameters of this embodiment: daily processing tailings water volume 10000m 3 , the concentration of tailings slurry before treatment is 15%, the concentration of dense bottom flow after treatment is 25%, and the overflow volume is 4000m 3 ;

[0026] Parameters of the equipment used:

[0027] Microwave oven: Model F—WB—2, nominal capacity 5000m 3 , power 45 kW;

[0028] Stirring tank: model φ3, nominal capacity 2500m 3 , power 5 kW;

[0029] Adjusting pool: capacity 100m 3 ;

[0030] The dense pool has a diameter of Φ53 meters, an average height of 2.8 meters, and a maximum treatment flow of 800m 3 / h, the upper flow rate is 2~4mm / s.

[0031] The operating cost of microwave treatment tailings slurry (excluding depreciation fee) is as follows:

[0032] Pharmaceutical element

/ m 3

Power consumption yuan / m 3

Labor cost yuan / m 3

Maintenance fee yuan / m 3

Total yuan / m 3 0.132 0.123 ...

Embodiment 2

[0040] The main technical parameters, equipment and parameters of this practical example are all the same as in Embodiment 1.

[0041] Specific steps are as follows:

[0042] A. After sending the tailings slurry into the regulating tank, control the concentration of the tailings slurry to 11%;

[0043] B. Discharge the tailings slurry in the regulating tank at 290m 3 The flow rate of / h is sent into the mixing tank from the self-regulating pool, and at the same time, the flow rate is 0.35kg / m 3 The dosage is to put quicklime into the tailings slurry in the mixing tank, and stir the slurry at room temperature until the pH value is 14;

[0044] C, the slurry in step B is 240m 3 The flow rate of / h is sent to the No. 2 stirring tank, according to 0.135L / m 3Then add treatment agent to the slurry in the No. 2 mixing tank. Under the condition of normal temperature and mixer speed of 15 rpm, stir the slurry until the pH value is 9, and the stirring time is 2 minutes to ac...

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Abstract

The invention provides a method for treating iron ore site-selection tailing water by utilizing microwave, which comprises the following technical steps: tailing mash is sent to an adjusting tank for adjusting the concentration to 9-11 percent, then sent to a stirring tank with the flow of 160-292m<3>/h, and simultaneously quicklime is dosed into the tailing mash according to the dosing amount of 0.25-0.35kg/m<3>, the tailing mash is stirred at room temperature until the pH value is 10-14, a treatment agent is dosed into the tailing mash according to the dosing amount of 0.117-0.135L/m<3>, the tailing mash is stirred at room temperature until the pH value is 6-9, the tailing mash is sent to an industry microwave oven with the flow of 160-292m<3>/h, under the conditions of the power of 40-50kw and the frequency of 915 MHz, the tailing mash is treated for 1-2 seconds by the microwave and then sent to a turbidness tank for depositing for 240-300 minutes, overflow water is recycled, substrate sludge is sent to a tailing dam for placing. The method realizes the recycling of the tailing water, not only solves the problem of short water resources, but also avoids the potential safety hazard resulted from wet beaches and reduces the manufacture cost.

Description

technical field [0001] The invention relates to a method for treating tailings water in an iron ore dressing plant, in particular to a method for treating tailings water in an iron ore dressing plant by using microwaves, and belongs to the technical field of tailings water treatment. Background technique [0002] At present, the contradiction between supply and demand of water resources in my country is serious. Among the 640 cities in the country, there are more than 300 water-deficient cities, of which 114 are severely water-deficient cities, with a daily water shortage of 16 million tons and a direct economic loss of 200 billion yuan due to water shortage every year. Reduce grain production by 70-80 billion kg. It is predicted that in 2010, the total water supply in the country will be 620-650 billion m 3 , the corresponding total water demand will reach 730 billion m 3 , the gap between supply and demand is nearly 100 billion m 3 . [0003] Water is the lifeblood of...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F1/30C02F1/66C02F1/52
Inventor 罗明发徐有生徐永仁叶亚雄谢德良林玲钟粤琼
Owner KUNMING IRON & STEEL GRP CO LTD
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