Portland cement clinker

A Portland cement and clinker technology, applied in cement production and other directions, can solve problems such as not conducive to reducing production costs, not conducive to the protection of land resources, agricultural ecological environment and human living environment, etc. Natural environment, the effect of saving raw materials

Inactive Publication Date: 2004-08-11
唐山协兴水泥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, the raw material formula of Portland cement clinker in the traditional process is not conducive to the protection of land resources, agricultural ecological environment and human living environment, nor is it conducive to reducing production costs and improving economic benefits.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Portland cement clinker of the present invention, its raw material is by weight percentage by limestone, iron ore tailing sand, fly ash, pot bottom slag and pure iron fine powder and / or bauxite: limestone 74.5% (at 73 ~86% is feasible), iron ore tailings 10% (all are feasible within 5~18%), fly ash 12% (all are feasible within 2~12%), Bottom slag 3% (feasible in the range of 1-8%), pure iron fine powder and / or bauxite 0.5% (feasible in the range of 0-0.5%) for batching, according to conventional cement The production process processes it into cement clinker. Wherein the weight percent of pure iron fine powder and bauxite is: pure iron fine powder 70% (all feasible in the scope of 0~100%), 30% of bauxite (all feasible in the scope of 0~100%) of).

Embodiment 2

[0019] Portland cement clinker of the present invention, its raw material is by weight percent by limestone, iron ore tailing sand, fly ash, pot bottom slag and pure iron fine powder and / or bauxite: limestone 76.5% (at 76 ~83% is feasible), iron ore tailings 13% (all are feasible within 6~16%), fly ash 5% (all are feasible within 4~10%), Bottom slag 5% (feasible in the range of 1-5%), pure iron fine powder and / or bauxite 0.5% (feasible in the range of 0-0.5%) for batching, according to conventional cement The production process processes it into cement clinker. Wherein the weight percent of pure iron fine powder and bauxite is: pure iron fine powder 50% (all feasible in the scope of 0~100%), bauxite 50% (all feasible in the scope of 0~100%) of).

Embodiment 3

[0021] Portland cement clinker of the present invention, its raw material is by weight percentage by limestone, iron ore tailing sand, fly ash, pot bottom slag and pure iron fine powder and / or bauxite: limestone 80% (at 79 ~81% are feasible), iron ore tailings 11% (9~13% are feasible), fly ash 6% (6~8% are feasible), Bottom slag 2.7% (feasible in the range of 2-3%), pure iron fine powder and / or bauxite 0.3% (feasible in the range of 0-0.5%) for batching, according to conventional cement The production process processes it into cement clinker. Wherein the weight percent of pure iron fine powder and bauxite is: pure iron fine powder 30% (all feasible in the scope of 0~100%), 70% of bauxite (all feasible in the scope of 0~100%) of).

[0022] The Portland cement clinker of the present invention can utilize industrial waste slag and waste materials, and after batching, go through raw meal mill→raw meal bin→preheater→rotary kiln, and calcinate into Portland cement clinker at a hig...

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Abstract

A portland cement clinker is prepared from lime stone (73-86 wt.%), iron ore tailings (5-18), flyash (2-12), and cinder (1-8) through compounding. Its advantages are low energy consumption and low pollution.

Description

technical field [0001] The invention relates to a hydraulic Portland cement clinker. Background technique [0002] Raw meal preparation for the production of traditional Portland cement clinker clinker, the formula generally uses the following raw materials: [0003] 1. Limestone 77-82% 2. Clay 14-18% 3. Iron ore (or corrected raw material) 4-6% [0004] Judging from the formula of traditional raw materials, in addition to limestone, 18-24% of clay and iron ore are needed, and clay and iron ore mainly come from cultivated land and iron ore resources. Especially for clay, it takes 230-300 kg of clay to produce 1 ton of clinker. The annual production of cement clinker in my country is about 400-450 million tons. Assuming that 50% of the siliceous corrected raw materials come from clay, then the annual use of cultivated land The volume is 50 to 70 million cubic meters, and the depth of excavation is calculated as 2 meters, destroying 37,500 to 52,500 mu of cultivated land ever...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/02C04B7/19
CPCY02P40/10
Inventor 李国成朱少达
Owner 唐山协兴水泥有限公司
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