Method for measuring organic carbon content in sodium aluminate serosity

A determination method and technology of sodium aluminate are applied in the direction of chemical analysis by titration, analysis of materials, instruments, etc., which can solve the problems of increased impurity content of finished alumina, difficulty in solid-liquid separation, and reduced dissolution rate, etc. Simple and effective method

Active Publication Date: 2009-11-18
中铝中州铝业有限公司
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Problems solved by technology

Due to the addition of organic matter such as flotation agents and collectors in the beneficiation process, coupled with the organic matter contained in the ore itself, the accumulation of organic matter in the process has caused a series of problems in production: for example: reduction of dissolution rate, solid-liquid phase separation

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  • Method for measuring organic carbon content in sodium aluminate serosity

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Embodiment

[0012] 1. Take the sodium aluminate slurry sample into the porcelain boat, adopt the combustion method, use pickled asbestos as the covering, first dry at low temperature for 30-50 minutes, gradually raise the temperature to 900°C, and burn it under the condition of oxygen Burn for 2 minutes, absorb the generated CO with potassium hydroxide 2 , measure the total carbon content in the material with the gas volumetric method (specific operation and testing device are as follows): the total carbon content in organic carbon and sodium carbonate potassium carbonate.

[0013] Check the air tightness: before working, check whether there is any air leakage in the carbon measuring instrument section by section.

[0014] 1) Turn the piston to make the absorption bottle communicate with the measuring gas tube, and use the level bottle to adjust the absorption liquid to the top of the buoy, close the piston, and the absorption liquid level should not drop at this time, otherwise the pisto...

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Abstract

The invention provides a method for measuring the organic carbon content in the sodium aluminate serosity, relating to the method for measuring the organic carbon content in the sodium aluminate serosity in the process flow of manufacturing aluminium oxide by an ore dressing-Bayer process. The method is characterized in that the test procedures comprises the following steps in sequence: (1) adding sodium aluminate serosity samples to a porcelain boat, adopting a combustion method, taking an acid-washed asbestos as a slipcover, firstly, drying for 30 to 50 minutes at the low temperature, gradually heating up to 900 DEG C, firing for two minutes in the presence of oxygen, absorbing the generated CO2 with potassium hydroxide, and measuring the full carbon contents in the materials with a gas volumetric method; (2) adopting acid base titration to measure the inorganic carbon contents in the measuring sample; and (3) adopting a subtraction method to measure the organic carbon content in the sample. In the method of the invention, appropriate reaction conditions are selected for the materials in the process; the full carbon and inorganic carbon content in the materials are measured in sequence by the gas volumetric method and the acid base titration; the organic carbon content is measured by the subtraction method. The method is simple and effective.

Description

technical field [0001] A method for measuring organic carbon content in sodium aluminate slurry relates to a method for determining organic carbon content in sodium aluminate slurry in the ore dressing-Bayer process for producing alumina. Background technique [0002] Mineral dressing - production of alumina by Bayer process - the world's first complete realization of large-scale industrial production of alumina with medium and low-grade diaspore bauxite as raw material, it is a pioneering and integrated The innovative achievements, the overall process technology is at the international leading level. Due to the addition of organic matter such as flotation agents and collectors in the beneficiation process, coupled with the organic matter contained in the ore itself, the accumulation of organic matter in the process has caused a series of problems in production: for example: reduction of dissolution rate, solid-liquid phase separation Difficulties, the impurity content of f...

Claims

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Application Information

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IPC IPC(8): G01N7/08G01N31/16
Inventor 张素霞赵东峰娄东民李德清
Owner 中铝中州铝业有限公司
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