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Composite flux for improving coal ash melting properties and its preparation method and application

A technology of flux and characteristics, applied in the direction of granular/powder fuel gasification, etc., can solve the problems of poor melting of coal ash with high ash melting point, and achieve excellent flux effect, improved melting characteristics, good economic and social benefits. Effect

Active Publication Date: 2021-12-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a composite flux for improving the melting characteristics of coal ash with high ash melting point and its preparation method and application, which not only solves the technical problem of poor melting of coal ash with high ash melting point, but also solves the resource utilization of polluted waste red mud How to make reasonable use of the problem

Method used

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  • Composite flux for improving coal ash melting properties and its preparation method and application
  • Composite flux for improving coal ash melting properties and its preparation method and application
  • Composite flux for improving coal ash melting properties and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0024] According to the mass ratio, CaO and Bayer process red mud are mixed evenly in the ratio of 2:1 to make a composite flux, and then added to the high ash melting point coal at 2-6% of the mass content of the coal base, ground and mixed evenly. The mass content of basic oxides (CaO, Fe 2 o 3 and Na 2 The mass content of O) is 82.5%, and the balance is acidic oxide. The mass content of CaO in the composite flux is 68.9%, Fe 2 o 3 The mass content is 9.3%, Al 2 o 3 The mass content is 8.4%, TiO 2 The mass content is 1.5%.

Embodiment 2

[0026] Mix CaO and Bayer process red mud uniformly at a ratio of 1:1 according to the mass ratio to make a composite flux, then add 2-6% of the mass content of the coal base to the high ash melting point coal, grind and mix uniformly. The mass content of basic oxides (CaO, Fe 2 o 3 and Na 2 The mass content of O) is 73.4%, and the balance is acidic oxide. The mass content of CaO in the composite flux is 52.8%, Fe 2 o 3 The mass content is 14.1%, Al 2 o 3 The mass content is 12.7%, TiO 2 The mass content is 2.3%.

Embodiment 3

[0028] Mix CaO and Bayer red mud at a ratio of 1:2 according to the mass ratio to make a composite flux, and then add 2 to 6% of the mass content of the coal base to the high ash melting point coal, grind and mix evenly. The mass content of basic oxides (CaO, Fe 2 o 3 and Na 2 The mass content of O) is 64.4%, and the balance is acidic oxides. The mass content of CaO in the composite flux is 36.8%, Fe 2 o 3 The mass content is 19.0%, Al 2 o 3 The mass content is 17.1%, TiO 2 The mass content is 3.1%.

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Abstract

A composite flux for improving coal ash melting properties, its preparation method and application. The composite flux is composed of CaO and red mud. The chemical composition and mass content of the composite flux are: 56.1%-90.6% for basic oxides and 9.4%-43.9% for acidic oxides. The composite flux provided by the present invention can not only effectively improve the melting characteristics of coal ash with high ash melting point, make it suitable for entrained bed gasification furnace with liquid slag discharge, but also realize resource utilization of polluted waste red mud, and has good economic and social benefits.

Description

technical field [0001] The invention relates to a composite flux for improving the melting characteristics of coal ash with high ash melting point, its preparation method and application. Background technique [0002] my country's energy structure is characterized by "rich coal and little oil". How to use these rich coal resources cleanly and efficiently has become the focus of attention of the country and relevant scientific researchers. As an efficient and clean coal conversion technology, coal gasification technology has been paid more and more attention. Among them, entrained bed coal gasification technology has the characteristics of wide adaptability of coal types, high operating pressure and temperature, high carbon conversion rate, large production intensity and large scale, etc., and has good economic benefits and broad application prospects. Entrained bed gasification technology mostly uses liquid slag discharge. Therefore, the ash in the raw coal for gasificatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/48
Inventor 刘艳芳张然崔龙鹏王芳杰崔佃淼
Owner CHINA PETROLEUM & CHEM CORP
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