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A method for preparing cement clinker using converter slag

A technology of cement clinker and converter slag, which is applied in the field of building materials, can solve the problems of limited recycling and utilization of converter slag, limited capacity, and low utilization rate, and achieve the effects of reducing resource consumption, environmental load, and environmental pollution

Inactive Publication Date: 2015-08-12
TIANRUI GROUP CEMENT
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  • Description
  • Claims
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Problems solved by technology

[0004] Aiming at the above-mentioned problems such as the extremely limited method and capacity of reusing converter slag in the prior art and the low utilization rate, the present invention provides a method for preparing cement clinker by using converter slag

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  • A method for preparing cement clinker using converter slag
  • A method for preparing cement clinker using converter slag
  • A method for preparing cement clinker using converter slag

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Embodiment Construction

[0025] The present invention will be further elaborated below in combination with specific embodiments.

[0026] A method for preparing cement clinker by using converter slag, wherein the cement clinker is composed of raw materials in the following ratios by weight: 88.75 parts of limestone, 3.9 parts of sandstone, 3.75 parts of shale, and 3.6 parts of converter slag. It is produced through the processes of material grinding, slurry dehydration, filter cake drying and crushing, clinker firing and clinker cooling and crushing;

[0027] Raw meal grinding: The raw meal is weighed according to the following weight fraction ratio, 88.75 parts of limestone, 3.9 parts of sandstone, 3.75 parts of shale, 3.6 parts of converter slag, adding water, grinding, stirring evenly, making slurry, making the material The moisture content in the slurry is 35%;

[0028] Slurry dehydration: dehydrate the slurry at a vacuum of 0.02~0.05KPa to form a filter cake with a moisture content of less than ...

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Abstract

The invention relates to the technical field of building materials, and particularly relates to a method for preparing cement clinker from converter slag. Raw meal comprises the following raw materials 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, and the cement clinker is prepared by procedures of raw meal grinding, slurry dehydration, filter cake drying and crushing, clinker sintering, and clinker cooling and crushing. The method preparing cement clinker from converter slag provided in the invention adopts converter slag instead of pyrite cinder; the heat consumption of the clinker is reduced by using the raw meal; the converter slag has a high CaO content, which decreases the ratio of limestone, thus reduces CaCO3 in the raw meal, and further reduces the heat supply for predecomposition; the sinterability of the raw meal is improved; the sintering temperature is decreased; and the quality of the clinker is improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a method for preparing cement clinker with converter slag. Background technique [0002] Converter slag is the waste slag formed by adding limestone, fluorite, and ferrosilicon powder in order to remove harmful elements such as sulfur and phosphorus in iron during the steelmaking process. Converter slag is an inevitable by-product of the steelmaking process, and its discharge is about 15% to 20% of steel output; converter slag is mainly composed of oxides of calcium, iron, silicon, magnesium and a small amount of aluminum, manganese, phosphorus, etc. The main mineral phases are tricalcium silicate, dicalcium silicate, calcium magnesium Solid solution formed by olivine, calcium magnesium rhodoxene, calcium aluminate ferrite and oxides of silicon, magnesium, iron, manganese and phosphorus, also contains a small amount of free calcium oxide and metallic iron, fluoroap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/147C04B7/36
CPCY02P40/10Y02P40/121
Inventor 井献玉高运红陈丙武张献伟崔汉辉郭军社袁启亮罗佑文
Owner TIANRUI GROUP CEMENT
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