Low-grade bauxite cement clinker

A technology for cement clinker and bauxite, which is applied in the field of Portland cement clinker, can solve the problems of high harmful components and high cost, and achieves the effect of meeting process requirements and being easy to calcine.

Inactive Publication Date: 2018-01-09
SHANDONG DONGHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this mainstream material combination has obvious defects of high cost and high harmful components.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The proportion of materials in parts by weight is: 82.32 parts of limestone, 10.94 parts of sandstone, 3.69 parts of bauxite, and 3.05 parts of copper ore powder;

[0019] The mass percentage of CaO in limestone is 50.00%; the mass percentage of MgO is 2.00%;

[0020] Bauxite is a mixed bauxite of high-grade bauxite and low-grade bauxite:

[0021] ;

[0022] When the material is fired into cement clinker, the fuel coal indicators are 11.00% ash, 28.00% volatile, S=0.70%, calorific value=6200KcaL / Kg, moisture=11.00%;

[0023] The following table is the performance test of cement clinker prepared in this example:

[0024] .

Embodiment 2

[0026] The proportion of materials by weight is: 82 parts of limestone, 11.5 parts of sandstone, 3.5 parts of bauxite, 3.5 parts of copper ore powder;

[0027] The mass percentage of CaO in limestone is 50.00%; the mass percentage of MgO is 2.50%;

[0028] Bauxite is a mixed bauxite of high-grade bauxite and low-grade bauxite:

[0029] ;

[0030] When the material is fired into cement clinker, the fuel coal indicators are ash = 11.70%, volatile = 27.20%, S = 0.78%, calorific value = 6000KcaL / Kg, moisture = 12.40%;

[0031] The following table is the performance test of cement clinker prepared in this example:

[0032] .

Embodiment 3

[0034] The proportion of materials by weight is: 83 parts of limestone, 10.5 parts of sandstone, 4 parts of bauxite, 3 parts of copper ore powder;

[0035] The mass percentage of CaO in limestone is 49%; the mass percentage of MgO is 3.00%;

[0036] Bauxite is a mixed bauxite of high-grade bauxite and low-grade bauxite:

[0037] ;

[0038] When the material is burned into cement clinker, the index of fuel coal is ash content = 12.00%, volatile content = 25.50%, S = 0.80%, calorific value = 5800KcaL / Kg, moisture = 13.00%;

[0039] The following table is the performance test of cement clinker prepared in this example:

[0040] .

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Abstract

The invention discloses low-grade bauxite cement clinker, and belongs to the technical field of portland cement clinker. The low-grade bauxite cement clinker is characterized by being prepared from the materials in parts by weight, 81-84 parts of limestone, 10-12.5 parts of sandstone, 3-4.5 parts of bauxite and 2.5-4 parts of copper ore powder, wherein the mass percentage of CaO in the limestone is 48.00-50.00%, the mass percentage of Al2O3 in the bauxite is 18-20%, and the fuel for burning the materials into the cement clinker is coal. The performances of two kinds of materials, high-grade bauxite and low-grade bauxite are combined to realize dosage maximization of low-cost low-grade bauxite, so that the requirement for raw material blending is met, and the requirement for production of 28 d high-strength cement clinker is met.

Description

Technical field [0001] A low-grade bauxite cement clinker belongs to the technical field of Portland cement clinker. Background technique [0002] Portland cement is a hydraulic cementing material made from calcium silicate-based Portland cement clinker, limestone below 5% or granulated blast furnace slag, and an appropriate amount of gypsum. It is collectively called Portland cement. Internationally collectively referred to as Portland Cement. There are two types of Portland cement. The one without mixing material is called Type I Portland cement, code P·I, and the one with limestone or granulated blast furnace slag mixing material not exceeding 5% of the cement mass is called II. Portland cement, code P·Ⅱ. When Portland cement is mixed with water, complex physical and chemical reactions occur, called hydration. After the cement is mixed with water, it becomes a plastic cement slurry, until the cement slurry gradually thickens and loses plasticity but does not yet have streng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/02C04B7/44
Inventor 邓强吴埌朱波魏元芳路森贾忠孙娟单超孙槟冯玉梅
Owner SHANDONG DONGHUA TECH CO LTD
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