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Method for measuring organic matter content of coal gangue

A technology of organic matter content and coal gangue, applied in the field of petrology and mineralogy, can solve problems such as complicated steps, and achieve the effects of high reliability of results, reduced pollution, and high accuracy of test results

Inactive Publication Date: 2017-06-27
ANHUI UNIV OF SCI & TECH
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Problems solved by technology

[0008] In order to solve the various problems and complicated steps in the process of measuring the organic matter of coal gangue samples by the traditional method-titration method, the present invention provides a method for the determination of organic matter in coal gangue

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  • Method for measuring organic matter content of coal gangue

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Embodiment Construction

[0028] In order to solve the problems existing in the determination of organic matter in coal gangue samples by the traditional titration method, the present invention provides a method for the determination of organic matter in coal gangue, which simplifies the analysis process. The traditional titration method uses quantitative potassium dichromate-sulfuric acid solution, under heating conditions, the organic carbon in the coal gangue is oxidized, and the excess potassium dichromate is titrated with a ferrous sulfate standard solution, and at the same time, silicon dioxide is used as an additive for a blank test; a large amount of acid and Compounds such as heavy metals, and the whole experiment must be manually operated by personnel, which not only pollutes the environment but also requires a lot of manpower; the invention only needs to take samples and put them into the alumina crucible for experimentation, and does not require personnel to follow up and observe the whole pr...

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Abstract

The invention relates to petrology and mineralogy, in particular to a method for measuring organic matter content of coal gangue. The method comprises: grinding air-dried coal gangue, screening, taking a sample, measuring mass loss with a thermogravimetric analyzer, and calculating the organic matter content of the coal gangue. The calculation of organic matters in coal gangue innovatively through mass loss replaces the complex organics-measuring steps of the traditional titration; a temperature rise range of 35-800 DEG C is determined, the temperature of 800 DEG C is held for 10 min, the temperature rise rate is 15 DEG C per min, atmospheric simulation air is N2:O2=79:21, and atmospheric total mass is 100 ml / min; compared with the results of organic matter measurement by the existing common titration method, the method has a standard deviation and a deviation ratio of 0.30 and <4%; correlation of organic matter contents from measurements by the two methods is up to 0.9991. The method for measuring organic matters in coal gangue according to the invention has the advantages of good simplicity, good convenience, and high test result precision.

Description

technical field [0001] The invention relates to petrology and mineralogy, and specifically provides a method for measuring organic matter content in coal gangue, which is suitable for the determination of organic matter in large quantities of coal gangue. Background technique [0002] One of the uses of coal gangue is as fertilizer, and what is related to fertilizer is the content of organic matter. Therefore, it is of great significance to accurately and safely measure the organic matter content in coal rock to judge its possibility of becoming a fertilizer. [0003] The recognized classical organic matter measurement method is only applied to soil, rocks, organic fertilizers, etc., and the determination of organic matter content in coal gangue is determined by improving the classical organic matter measurement method. Most of this method uses a digestion tube to heat and nitrify in an oil bath or a sand bath. The heating temperature is generally between 170-190 ° C, so th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00
CPCG01N5/00
Inventor 李寒旭胡洋汤永新张晔段锦王蓓蓓薛梦瑶王守飞方刘伟
Owner ANHUI UNIV OF SCI & TECH
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