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Process for preparing cement clinker from bauxite converter slag

A cement clinker and converter slag technology, applied in the field of building materials, can solve the problems of low utilization rate, limited recycling process and capacity, etc., to reduce environmental load, reduce kiln firing system temperature, and improve clinker quality Effect

Inactive Publication Date: 2019-12-06
遵义兴正业矿业有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned problems in the prior art that the process and capacity of recycling bauxite converter slag are extremely limited and the utilization rate is not high, the present invention relates to a process for preparing cement clinker from bauxite converter slag

Method used

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  • Process for preparing cement clinker from bauxite converter slag
  • Process for preparing cement clinker from bauxite converter slag
  • Process for preparing cement clinker from bauxite converter slag

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Embodiment Construction

[0025] The present invention will be further explained below in conjunction with specific embodiments.

[0026] The present invention relates to a process for preparing cement clinker from bauxite converter slag. The cement clinker is composed of raw materials in the following parts by weight ratio:

[0027] Composition of raw meal: 88.75 parts of limestone, 3.9 parts of sandstone, 3.75 parts of shale, 3.6 parts of converter slag, which are produced after raw meal grinding, slurry dehydration, filter cake drying and crushing, clinker firing and clinker cooling and crushing processes ;

[0028] Raw meal grinding: The raw meal is weighed according to the following weight fraction ratios, 88.75 parts of limestone, 3.9 parts of sandstone, 3.75 parts of shale, 3.6 parts of converter slag, add water, grind, stir evenly, make a slurry, make the material The water content in the slurry is 35%;

[0029] Slurry dehydration: the slurry is dehydrated under the condition of vacuum degree 0.02~0.0...

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Abstract

The invention relates to the technical field of building materials and discloses a process for preparing cement clinker from bauxite converter slag. The raw materials of the cement clinker are composed of, in parts by weight, 87.75-89.75 parts of limestone, 2.9-4.9 parts of sandstone, 2.75-4.75 parts of shale and 2.6-4.6 parts of converter slag. The process comprises the following steps: subjecting the raw materials to grinding; subjecting slurry to dehydration; drying and crushing of a filter cake, sintering clinker; and cooling and crushing the clinker. According to the process for preparingcement clinker from bauxite converter slag in the invention, the converter slag is used instead of sulfuric acid slag, the heat consumption of the clinker is reduced in batching; and since the converter slag contains high content of CaO, the proportioning amount of limestone is reduced, and the amount of CaCO3 in the raw materials is reduced, so the heat supply for pre-decomposition is reduced, the burnability of the raw materials is improved, sintering temperature is lowered, and the quality of the clinker is enhanced.

Description

Technical field [0001] The invention relates to the technical field of building materials, and a process for preparing cement clinker from bauxite converter slag. Background technique [0002] Converter slag is the waste slag formed by adding limestone, fluorite, and ferrosilicon powder in the process of smelting bauxite to remove harmful elements such as sulfur and phosphorus in iron. Converter slag is an inevitable by-product of the smelting process, and its discharge is about 15%-20% of crude steel output; converter slag is mainly composed of calcium, iron, silicon, magnesium and a small amount of oxides such as aluminum, manganese, and phosphorus. The main mineral phases are tricalcium silicate, dicalcium silicate, and calcium. A solid solution formed by forsterite, calcium-magnesium rhodonite, calcium ferroaluminate and oxides of silicon, magnesium, iron, manganese, and phosphorus. It also contains a small amount of free calcium oxide and metallic iron, fluoroapatite, etc. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/147C04B7/30C04B7/36
CPCC04B7/147C04B7/30C04B7/36Y02P40/10
Inventor 黄道伦
Owner 遵义兴正业矿业有限公司
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