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Method for preventing ore pulp scarring during long-distance delivery

A technology for long-distance transportation and slurry, which is applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc. It can solve the problems of determining the location of scabs and the difficulty of removing scabs, and achieves the goal of reducing energy consumption and saving production costs Effect

Active Publication Date: 2009-10-14
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
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AI Technical Summary

Problems solved by technology

However, when the pulp is transported over a long distance, it is very difficult to determine the location of the scar and remove the scar. Therefore, how to solve the scar in the long-distance transport of the pulp is the current problem.
It is obviously not feasible to continue to use the current short-distance transportation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: lye is made of high caustic (NaOH) and percarbonate (NaCO 3 ) composition; the concentration of high caustic in lye is Na 2 The concentration of O is calculated as 250-260g / L; the concentration of percarbonate base is Na 2 The O concentration is calculated to be 30-40g / L; first mix bauxite with lye in the mine to make a high-alkali slurry with a weight ratio of 46% bauxite and 54% lye, and then transport it through long-distance pipelines ; while the high alkali concentration pulp is transported for a long distance in the pipeline at a flow rate of 1.8-2.0m / s.

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Abstract

The invention discloses a method for preventing ore pulp scarring during long-distance delivery. Firstly, alumyte is ground and blended with lye into 40-60 percent of high-alkalinity ore pulp by weight ratio in a mine, and finally, the high-alkalinity ore pulp is delivered by a pipeline in a long-distance way. The invention adopts a high-concentration above-critical (particles are not subsided ona pipe wall) delivery method and also scientifically controls the concentration of the delivered high-alkalinity ore pulp inside the pipeline, thereby effectively preventing the high-alkalinity ore pulp inside the pipeline scarring when being delivered; in addition, the invention reduces the energy source consumption and saves the production cost, and the delivering distance can reach more than 100 kilometers.

Description

technical field [0001] The invention relates to a method for preventing scarring, in particular to a method for preventing scarring during long-distance transport of ore pulp. Background technique [0002] In the alumina production process, bauxite is mainly used as raw material. Usually, the distance between the mine and the alumina production plant is relatively far, tens of kilometers or even hundreds of kilometers, and it is necessary to use vehicles to transport the ore to alumina. After the factory, the ore is processed. This method is not only time-consuming and laborious, but also increases the production cost. Therefore, long-distance transportation of ore slurry pipelines has appeared. However, currently the pulp used in the alumina production plant is also transported by pipeline lye, and the pipeline slurry transportation used at this time is short distance (basically within 100 meters), low concentration (about 20%), At low speed (usually around 1.5m), scarring...

Claims

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Application Information

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IPC IPC(8): F17D1/17
Inventor 柳健康刘建钢王奎龚智远伍良渝王文志刘德宽周江筑刘昌洌路增进严天志
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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