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Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings

A technology of sulphoaluminate cement and copper tailings, which is applied in the field of building materials, can solve problems such as land occupation and environmental pollution, and achieve the effects of small fineness, increased solid-phase reaction speed, and low firing temperature

Inactive Publication Date: 2010-10-13
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the raw material gypsum used in the production of sulphoaluminate cement clinker is less and less, and fluorine gypsum, phosphogypsum and copper tailings, which are industrial solid wastes, are continuously discharged to the society, exceeding the self-purification ability of nature. The environment is greatly polluted, and the accumulation or burial of these solid wastes takes up a lot of land

Method used

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  • Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings
  • Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings
  • Method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings

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Experimental program
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Effect test

Embodiment 1-3

[0019] A method for preparing sulphoaluminate cement clinker by utilizing fluorogypsum, phosphogypsum and copper tailings, the specific steps are: replacing ordinary natural gypsum with industrial solid waste fluorogypsum and phosphogypsum, and adding an appropriate amount of copper tailings, Mix evenly with limestone, bauxite again and grind, under the new dry process cement system, be fired into sulphoaluminate cement clinker by precalcining kiln system at lower temperature (embodiment 1, the firing of 2 and 3 The forming temperatures are about 1260°C, about 1280°C and about 1320°C, respectively), and the mass percentages of each raw material are shown in Table 1.

[0020] The fluorine gypsum used above is a by-product of hydrogen fluoride production with sulfuric acid and fluorspar, its main component is calcium sulfate dihydrate, and its chemical components are calculated by mass percentage: CaO: 33-39%, SO 3 : 40~51%, SiO 2 : 0.62~4.1%, F: 2.7~6.8%, other chemical compon...

Embodiment 1

[0021] Embodiment 1: See Table 1 for the mass percentages of each raw material. The prepared sulphoaluminate cement clinker product: its chemical composition and mineral composition are shown in Table 2, and its physical and mechanical properties are shown in Table 3.

Embodiment 2

[0022] Embodiment 2: See Table 1 for the mass percentages of each raw material. The prepared sulphoaluminate cement clinker product: its chemical composition and mineral composition are shown in Table 4, and its physical and mechanical properties are shown in Table 5.

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Abstract

The invention belongs to the filed of building materials, and relates to a method for preparing sulphoaluminate cement clinker with fluorgypsum, phosphogypsum and copper tailings, which is characterized by comprising the following steps: uniformly mixing limestone, bauxite, fluorgypsum, phosphogypsum and copper tailings, grinding together and then obtaining the sulphoaluminate cement clinker by firing in a precalcining kiln system, wherein the sulphoaluminate cement clinker comprises the following raw materials by weight percent: 29-35% limestone, 45-55% of bauxite, 5-20% of fluorgypsum, 1-10% of phosphogypsum and 0.5-3% of copper tailings. The preparation method adopts industrial solid waste as a raw material, and has low cost, less environmental pollution, low burning temperature of the clinker, low energy consumption per unit of the clinker, and high strength of the obtained clinker.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a method for preparing sulphoaluminate cement clinker by utilizing industrial solid waste fluorogypsum, phosphogypsum and copper tailings. Background technique [0002] Sulphoaluminate cement is a cement with low energy consumption and low environmental load, and its clinker firing temperature is 1350±50°C. Compared with ordinary Portland cement clinker, the firing temperature range of sulphoaluminate cement is the same as 100°C, but its firing temperature is 100°C lower, so sulphoaluminate cement is more beneficial to energy saving. However, at present, the raw material gypsum used in the production of sulphoaluminate cement clinker is less and less, and fluorogypsum, phosphogypsum and copper tailings, which are industrial solid wastes, are continuously discharged to the society, exceeding the self-purification ability of nature. The environment is greatly polluted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/00
CPCC04B2103/0016C04B7/323C04B2111/00215Y02P40/121
Inventor 马保国吴贝李相国蹇守卫郑兵
Owner WUHAN UNIV OF TECH
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