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High concentration high viscosity tailing conveying and storing-up method

A high-viscosity, high-concentration technology, applied in the direction of gas/liquid distribution and storage, pipeline systems, mechanical equipment, etc., can solve the problems of oil separation pumps that cannot be transported, waste of power resources, and complex transport processes, etc., and achieve obvious technical advantages and Economic advantages, reduced energy consumption, and simple process

Inactive Publication Date: 2006-05-24
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the distance between the concentrator and the tailings pond is 2-10km, and the outlet pressure of the tailings conveying pump will reach more than 12MPa. At present, ordinary centrifugal pumps and oil separation pumps cannot convey, and even the highest conveying pressure of the diaphragm pump can only reach 35MPa, unable to transport more than 6km
Moreover, high-lift pumps will inevitably waste a lot of power resources, and at the same time, the equipment investment is relatively large, and the delivery pipeline must be a high-pressure pipeline
The transportation process is more complicated and the transportation cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] First, add sodium hexametaphosphate with a concentration of 20% in the feeding tank in front of the tailings delivery pump, the amount added is 0.1‰ of the dry tailings, the viscosity of the bauxite tailings before adding is 10000mPa.s, and the mass concentration is 55% , the tailings viscosity after adding is 150mPa.s, the tailings pump adopts a centrifugal pump, the conveying distance is 2km, and the pump outlet pressure is 0.3Mpa.

[0025] Add aluminum sulfate into the pipeline 10m before the tailings discharge outlet, the concentration of aluminum sulfate is 30%, the amount added is 0.1‰ of the dry tailings, the tailings discharge viscosity is 12000mPa., the tailings are stockpiled in the warehouse, and the stockpiling height is 10mm , 1 day cracking in summer.

Embodiment 2

[0027] First, add sodium hexametaphosphate with a concentration of 10% in the feeding tank before the tailings delivery pump, the addition amount is 0.2‰ of the dry tailings, the viscosity of the bauxite tailings before adding is 8300mPa.s, and the mass concentration is 50% , the tailings viscosity after adding is 30mPa.s, the tailings pump adopts a centrifugal pump, the conveying distance is 7km, and the pump outlet pressure is 1.7Mpa.

[0028] Add aluminum sulfate into the pipeline 50m before the tailings discharge outlet, the concentration of aluminum sulfate is 50%, the added amount is 5‰ of the dry tailings, the tailings discharge viscosity is 10000mPa., the tailings are stockpiled in the warehouse, and the stockpiling height is 10mm , 1 day cracking in summer.

Embodiment 3

[0030] First, add sodium hexametaphosphate with a concentration of 10% in the feeding tank in front of the tailings delivery pump, the amount added is 0.01‰ of the dry tailings, the viscosity of the bauxite tailings before adding is 5000mPa.s, and the mass concentration is 45% , the tailings viscosity after adding is 100mPa.s, the tailings pump adopts a centrifugal pump, the conveying distance is 7km, and the pump outlet pressure is 1.2Mpa.

[0031] Add sulfuric acid into the pipeline 30m before the tailings discharge outlet, the concentration of sulfuric acid is 50%, and the added amount is 5‰ of the dry tailings. 1 day cracked.

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PUM

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Abstract

The invention especially is related to transporting and stockpiling flotation tailing of bauxite in high thickness and high degree of viscosity. Before transporting flotation tailing, the method adds agent for lowering dense to reduce degree of viscosity of flotation tailing pulp to 30-150mPa.s from 5000-10000mPa.s, and then transports it to stockyard by using pump. The method adds agent for increasing dense to raise degree of viscosity of flotation tailing pulp to higher than 10000mPa.s before the flotation tailing pulp enters into stockyard to realize piling in dry method. The said agent for lowering dense is sodium hexametaphosphate used widely. The said agent for increasing dense is acidic sulfate hydrolyzed from one of aluminum sulphate, ferrous sulfate, zinc sulfate, copper sulphate, barium sulphate and alum. Advantages are: lowering difficulty for transporting flotation tailing, reducing energy consumption, raised piling safety, and simple technique.

Description

technical field [0001] The method for conveying and stockpiling high-concentration and high-viscosity tailings relates to the transportation and stockpiling of tailings in ore dressing, and in particular involves the transportation and stockpiling of flotation tailings of high-concentration and high-viscosity bauxite. Background technique [0002] The transportation of high-concentration and high-viscosity tailings is currently mainly realized by high-lift pumps. When carrying out long-distance transportation, the lift of a single centrifugal pump is not enough, and multiple pumps need to be connected in series. In addition, oil separation pumps, screw pumps, etc. pumps, diaphragm pumps, etc. High power consumption, large investment in equipment, high operating costs, and serious waste of resources. [0003] There are two main types of tailings stockpiling, dry method and wet method. Dry stockpiling requires high pulp concentration, high viscosity, and large stacking angle...

Claims

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Application Information

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IPC IPC(8): F17D1/16
Inventor 汪明宏王海军王大庆李培增李太昌刘焦萍晏华钎
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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