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High-iron aluminate cement

A technology of aluminate cement and high-speed iron, applied in the field of cement, can solve problems such as poor corrosion resistance, short setting time, and low strength, and achieve the effect of high late strength, low early strength, and large growth rate

Pending Publication Date: 2021-10-29
DENGDIAN GROUP CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, only sulphoaluminate clinker is used for calcination of special cement in the calciner system outside the kiln, and there is no precedent for calcining ferroaluminate clinker by calcining ferroaluminate in a calciner outside the kiln.
Especially when the aluminum content in bauxite is low, the high-iron aluminate cement prepared by using the traditional calcination process and raw material ratio has the problems of short setting time, low strength and poor corrosion resistance.

Method used

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Examples

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Effect test

Embodiment 1

[0019] Example 1: A high-iron aluminate cement obtained by calcining bauxite in a calciner outside the kiln;

[0020] Calcium stone and desulfurized gypsum are also added to the raw material of calcined bauxite; bauxite with low aluminum content is calcined by calciner outside the kiln, and calcined stone and desulfurized gypsum are added for calcination process to obtain high iron aluminate cement Clinker, the setting time is significantly longer than that of sulphoaluminate clinker, the early strength is low, the later strength is high, and the growth rate is large. It is suitable for the production of retarded cement required by the market. At the same time, the cement has corrosion resistance and is suitable for oceans; The blank of calcining iron-aluminate clinker with calciner outside the kiln.

[0021] According to the weight fraction, 35-37 parts of bauxite, 47-49 parts of calcium stone, and 15-17 parts of desulfurized gypsum; the use of reasonable proportions is condu...

Embodiment 2

[0028] Example 2: A high iron aluminate cement obtained by calcining bauxite in a calciner outside the kiln; calcinite and desulfurized gypsum are added to the calcined bauxite raw material; calcinite and desulfurized gypsum are also added to the calcined bauxite raw material Desulfurization gypsum: calcining bauxite with low aluminum content in a calciner outside the kiln, and adding high calcium stone and desulfurization gypsum for calcining processing, the obtained high-iron aluminate cement clinker has a setting time compared with sulphoaluminate clinker Obvious side length, low early strength, high late strength, and large growth rate, suitable for the production of retarded cement required by the market. At the same time, the cement has corrosion resistance and is suitable for marine applications; it makes up for the use of calciners outside the kiln to calcinate ferroaluminate clinker Craft blank.

[0029] When the Al2O3 content in the bauxite is 48.25%, according to pa...

Embodiment 3

[0036] Example 3: A high iron aluminate cement obtained by calcining bauxite in a calciner outside the kiln; calcinite and desulfurized gypsum are added to the calcined bauxite raw material; calcinite and desulfurization gypsum are also added to the calcined bauxite raw material Desulfurization gypsum: calcining bauxite with low aluminum content in a calciner outside the kiln, and adding high calcium stone and desulfurization gypsum for calcining processing, the obtained high-iron aluminate cement clinker has a setting time compared with sulphoaluminate clinker Obvious side length, low early strength, high late strength, and large growth rate, suitable for the production of retarded cement required by the market. At the same time, the cement has corrosion resistance and is suitable for marine applications; it makes up for the use of calciners outside the kiln to calcinate ferroaluminate clinker Craft blank.

[0037] When the Al2O3 content in the bauxite is 48.86%, according to...

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Abstract

The invention discloses high-iron aluminate cement, which is obtained by calcining bauxite in a decomposition furnace outside a kiln; high-calcium stone and desulfurized gypsum are also added into the calcined bauxite raw material; according to the weight fraction, the bauxite accounts for 35-37 parts, the high-calcium stone accounts for 47-49 parts, and the desulfurized gypsum accounts for 15-17 parts. The high-iron aluminate cement disclosed by the invention has the beneficial effects that the problems that when the aluminum content in bauxite is relatively low, the prepared high-iron aluminate cement is short in setting time, low in strength and relatively poor in corrosion resistance by adopting a traditional calcining process and a raw material ratio are solved.

Description

technical field [0001] The invention relates to the technical field of cement, in particular to a high-iron aluminate cement. Background technique [0002] The decomposition technology outside the kiln, the preheating of cement raw meal powder and the decomposition process of most of the calcium carbonate are carried out in the preheater and decomposition furnace outside the kiln. It was developed in the early 1970s and is for the dry process. A major technical innovation of rotary kiln calcined cement clinker. [0003] At present, only sulphoaluminate clinker is used for calcining special cement in the domestic calciner system outside the kiln, and there is no precedent for calcining ferroaluminate clinker by calcining ferroaluminate in a calciner outside the kiln. Especially when the aluminum content in bauxite is low, the high iron aluminate cement prepared by adopting the traditional calcination process and raw material ratio has the problems of short setting time, low ...

Claims

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Application Information

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IPC IPC(8): C04B7/32C04B7/43
CPCC04B7/323C04B7/43
Inventor 王新峰韩学峰韩朝敏景东皓刘银东侯学亮赵晓东梁永强李瑞红吴少贞
Owner DENGDIAN GROUP CEMENT
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