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High-efficiency composite flux for lowering the melting point of coal ash and its preparation method and application

A technology of flux and melting point, used in the manufacture of combustible gas, gasification process, granular/powder fuel gasification, etc., can solve the problems of high cost and large amount of addition, and achieve low ash content, small amount of addition, and fluxing obvious effect

Active Publication Date: 2019-04-30
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In summary, the prior art has the disadvantages of large amount of addition and high cost

Method used

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  • High-efficiency composite flux for lowering the melting point of coal ash and its preparation method and application
  • High-efficiency composite flux for lowering the melting point of coal ash and its preparation method and application
  • High-efficiency composite flux for lowering the melting point of coal ash and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Limestone ore powder (containing 98.2wt% CaCO 3 ) and industrial by-product Yuanming powder (mainly containing 98.6wt% Na 2 SO 4 , 1.3wt% CaO) is fully mixed with a ratio of 1:1 to make a composite flux, and then the mass fraction is 1.09%, 0.93% and 1.08% (based on coal, the number of flux parts added in 100 parts of coal ) were added to Wangtai coal, Sihe coal and Zhaozhuang coal respectively, and mixed evenly. The effect of composite flux on the melting point of coal ash is shown in Table 3.

Embodiment 2

[0023] Embodiment 2: Limestone ore powder (mainly containing 97.8wt% CaCO 3 ) and industrial by-product Yuanming powder (mainly containing 98.3wt% Na 2 SO 4, 1.1wt% CaO) is fully mixed with a ratio of 6:4 to make a composite flux, and then the mass fraction is 1.52%, 1.11% and 1.21% (based on coal, the number of flux parts added in 100 parts of coal ) were added to Wangtai coal, Sihe coal and Zhaozhuang coal respectively, and mixed evenly. The effect of composite flux on the melting point of coal ash is shown in Table 4.

Embodiment 3

[0024] Embodiment 3: Limestone ore powder (containing 98.3wt% CaCO 3 ) and industrial by-product Yuanming powder (containing 98.3wt%Na 2 SO 4 , 1.1wt% CaO) is fully mixed with a ratio of 7:3 to make a composite flux, and then the mass fraction is 1.74%, 1.30% and 1.35% (based on coal, the number of flux added in 100 parts of coal) The composite flux was added to Wangtai coal, Sihe coal and Zhaozhuang coal respectively, and mixed evenly. The effect of composite flux on the melting point of coal ash is shown in Table 5.

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Abstract

A high-efficiency composite flux for reducing the melting point of coal ash is formed by compounding calcium-containing mineral powder with sodium-containing sodium sulfate according to a ratio of 1:1 to 8:2, and mainly comprises, by mass, 48.2-79.4% of CaCO3, 19.7-49.5% of Na2SO4 and 0.2-0.7% of CaO. The high-efficiency composite flux has the advantages of small addition amount, low cost, and reduction of the melting point of the coal ash.

Description

technical field [0001] The invention relates to a high-efficiency composite flux for lowering the melting point of coal ash, a preparation method and application thereof, and belongs to the field of flux. Background technique [0002] Fusibility of coal ash is an important index to evaluate the coal used for gasification, and it is of great significance to the selection of gasifier, the design of reactor, and the guidance of actual operation. It is generally believed that the deformation temperature of coal ash corresponds to the temperature of slight slagging and slight ash deposition on the heating surface of the gasifier; the softening temperature corresponds to the temperature of a large amount of slagging and a large amount of ash deposition in the gasifier; and the flow temperature It corresponds to the temperature at which the ash in the furnace flows in a liquid state or drips from the heating surface and is severely slagged on the grate. Therefore, the melting poin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/48
CPCC10J3/485C10J2300/0996
Inventor 白进陈晓东孔令学李怀柱李文白宗庆尉迟唯郭振兴
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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