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Quantitative analysis method for gasified slag mineral phase

A quantitative analysis and gasification slag technology, which is applied in the direction of analyzing materials, weighing and measuring devices by removing certain components, can solve the problems of low detection limit of analysis methods, harsh reaction conditions, and low data accuracy, and achieve The effect of low detection limit of impurities, mild reaction conditions and high data accuracy

Active Publication Date: 2020-04-24
CHINA PETROLEUM & CHEM CORP +3
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  • Description
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AI Technical Summary

Problems solved by technology

At present, the quantitative analysis of mineral phases is mainly based on the hydrofluoric acid digestion method or the semi-quantitative analysis method of the instrument, which has problems such as low detection limit of the analysis method, low data accuracy, and harsh reaction conditions.

Method used

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  • Quantitative analysis method for gasified slag mineral phase

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Comparison scheme
Effect test

Embodiment 1

[0031] Taking coal gasification slag in Ordos area as an example, as figure 1 As shown, the quantitative analysis method of gasification slag ore phase in this embodiment is:

[0032] (1) Take 100g of gasification slag and put it into a magnetic separator, and carry out secondary magnetic separation (two magnetic separations) under a magnetic field strength of 2000Gs. The content of the obtained iron microspheres is about 3.62g, and the iron microspheres 3.62%;

[0033] (2) the remaining 96.38g solid material is mixed with the nitric acid whose hydrogen ion concentration is 4mol / L, and the reaction temperature is 95°C, and the liquid-solid ratio is 3:1. Calcium, magnesium) leaching mass is 10.27g, remaining 86.11g;

[0034] (3) Mix the remaining 83.11g of primary pickling slag with a sodium hydroxide solution with a hydroxide ion concentration of 4mol / L, and react for 180min under the conditions of a reaction temperature of 75°C and a liquid-solid ratio of 3:1, and enter Th...

Embodiment 2

[0040] Taking the coal gasification slag in the Ordos area as an example, the quantitative analysis method of the gasification slag ore phase in this embodiment is:

[0041] (1) Take 100g of gasification slag and put it into a magnetic separator, and carry out 4-stage magnetic separation (4 magnetic separations) under a magnetic field strength of 5000Gs. The content of the obtained iron microspheres is about 3.67g, and the content of iron microspheres 3.67%;

[0042] (2) The remaining 96.37g solid material is mixed with hydrochloric acid with a hydrogen ion concentration of 10mol / L, and the reaction temperature is 55°C, and the liquid-solid ratio is 7:1. Calcium, magnesium) leaching quality is 12.63g, remaining 83.7g;

[0043] (3) Mix the remaining 83.7g of primary pickling slag with a sodium hydroxide solution with a hydroxide ion concentration of 1mol / L, and react for 120min under the conditions of a reaction temperature of 125°C and a liquid-solid ratio of 8:1, and enter ...

Embodiment 3

[0050] Taking the coal gasification slag in Shanxi as an example, the quantitative analysis method of gasification slag ore phase in this embodiment is as follows:

[0051] (1) Get 100g gasified slag and put it into the magnetic separator, under the magnetic field strength of 3000Gs, carry out three-stage magnetic separation (magnetic separation for three times), the obtained iron microsphere content is about 4.76g, and the iron microsphere content is 4.76%;

[0052] (2) the remaining 95.24g solid material is mixed with the nitric acid that the hydrogen ion concentration is 3mol / L, is 85 ℃ at reaction temperature, and reacts 120min under the condition that liquid-solid ratio is 5:1, metal oxide (iron, aluminium, Calcium, magnesium) leaching mass is 8.36g, remaining 86.88g;

[0053] (3) Mix the remaining 86.88g of primary pickling slag with a sodium hydroxide solution with a hydroxide ion concentration of 3mol / L, and react for 90min under the conditions of a reaction temperatu...

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Abstract

The invention relates to a quantitative analysis method for a gasified slag mineral phase. The method comprises the following steps: efficiently separating out iron micro-beads in gasified slag through a magnetic separation process, selectively and completely separating the glass phase and impurities contained in the glass phase in sequence through a crossed two-step acid-alkali method, completelyburning off inorganic carbon particles through high-temperature roasting, obtaining a stable quartz crystal phase as the solid phase, and accurately analyzing the accurate content of all components in the gasified slag. Compared with a traditional hydrofluoric acid dissolution method and an instrument semi-quantitative analysis method, the brand-new analysis method has the advantages of simple operation, good dissociation effect, low impurity detection limit, high data accuracy, mild reaction conditions and the like, has wide applicability, can provide a new thought for quantitative analysisof typical industrial / metallurgical solid waste mineral phases such as fly ash, coal gangue, metallurgical slag and the like, and has important guiding significance for developing a new solid waste high-valued utilization technology.

Description

technical field [0001] The invention relates to the field of resource utilization of inorganic chemical industry solid waste, in particular to a quantitative analysis method of gasification slag ore phase. Background technique [0002] Coal is mainly used in thermal power generation, gasification, liquefaction and other fields, and its proportion is as high as more than 90%. Organic resources have been efficiently utilized, but the large amount of inorganic components in it has caused serious air, soil, water pollution and other problems. Moreover, the waste slag generated during the application process has complex composition / mineral phase structure and is difficult to use. [0003] Gasification slag is mainly composed of four types of mineral phases: glass phase, crystal phase (quartz, mullite, corundum, etc.), iron microbeads, and inorganic carbon. However, due to the lack of in-depth understanding of its mineral phase structure and composition, it is currently processed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/00G01N5/04
CPCG01N5/00G01N5/04Y02P10/20
Inventor 孙志刚李少鹏杨宏泉郭强李会泉张建波胡文豪胡力蒋超邵迪
Owner CHINA PETROLEUM & CHEM CORP
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