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Aluminate cement and preparation thereof

A technology of aluminate cement and a manufacturing method, which is applied in the field of cement materials, can solve the problems of not finding resources that can be effectively utilized and high production costs, and achieve the effects of pollution-free treatment and good industrialization prospects.

Inactive Publication Date: 2009-07-08
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the above methods for preparing spinel-containing cement all use dolomite and magnesia as the main raw materials, and the production cost is relatively high by the sintering method.
[0012] In addition, the comprehensive utilization of titanium-containing blast furnace slag has always been one of the problems plaguing my country's scientific and technological circles.
"Method for preparing titanium and titanium alloys using titanium-containing slag" (ZL200510019664.3) patented technology, the titanium-containing compounds in the slag are reduced to metallic titanium or titanium alloys by melting heat reduction method, although it can increase the yield of titanium in titanium-containing slag Yield, reduce the residual titanium content in the residue, but the residue after extracting titanium metal has not yet found a method of pollution-free and effective utilization of resources

Method used

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  • Aluminate cement and preparation thereof
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  • Aluminate cement and preparation thereof

Examples

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Effect test

Embodiment 1

[0021] An aluminate cement and a preparation method thereof. Adopting the patented technology of "Preparation of Titanium and Titanium Alloys Using Titanium-Containing Slag" (ZL200510019664.3) patented by the applicant, the TiO 2 Titanium-containing blast furnace slag or titanium-containing slag produced by other smelting methods with a content of 10-90 wt%, plus 0-50% carbon, 0-40 wt% aluminum metal, 0-40% iron and 0-20% magnesium It is a reducing agent, and the amount of the reducing agent added is not zero at the same time. After mixing evenly, it is melted and thermally reduced to obtain titanium and titanium alloys.

[0022] Then use the residue after extracting titanium and titanium alloy by the patented method as raw material, add bauxite with 5% to 15% of the residue in the molten state, and obtain clinker by standing and cooling slowly after melting; then After crushing and grinding until the specific surface area is greater than 3000cm2 / g, aluminate cement is obtain...

Embodiment 2

[0026] An aluminate cement and a preparation method thereof. The residue raw material adopted is the same as that in Example 1. The residue is in a molten state, and bauxite of 15% to 25% of the residue is added to adjust the composition. If the surface area is greater than 3000cm2 / g, aluminate cement can be obtained. Its chemical composition and physical properties are shown in Table 4.

[0027] Table 4

[0028]

Embodiment 3

[0030] An aluminate cement and a preparation method thereof. The residue raw material used is the same as that in Example 1, the residue is in a molten state, bauxite with 25% to 32% of the residue is added, and the clinker is obtained by slow cooling after melting, and then crushed and ground until the specific surface area is greater than 3000cm 2 / g, the aluminate cement is obtained. Its chemical composition and physical properties are shown in Table 5.

[0031] table 5

[0032]

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Abstract

The invention in particular relates to an aluminate cement and a method for preparing the same. The invention adopts the following technical proposal: according to patent technology (ZL200510019664.3) of a method for preparing titanium and titanium alloy through utilization of titaniferous slag, after the titanium and titanium alloy are extracted by the patent method, the slag in a molten state is added with bauxite or industrial alumina of 5 to 40 weight percent of the slag, is melted, is subjected to cold quenching or slow cooling and is broken and pulverized till the specific surface area is more than 3,000cm / g, thereby preparing the aluminate cement. The chemical compositions of a produced product mainly comprise CaO, Al2O3, MgO and little SiO2; and the main crystal phases of the product are monocalcium aluminate (CA), dicalcium aluminate (CA2) and magnalium spinel (MgAl2O4) and sometimes contain little C12A7 and C2AS (gehlenite). The aluminate cement and the method can effectively utilize titanium resource of the slag, realize high added value utilization of the slag, realize harmless treatment of the titaniferous blast furnace slag and have better industrialized prospect.

Description

technical field [0001] The invention belongs to the technical field of cement materials. In particular, it relates to an aluminate cement and a preparation method thereof. Background technique [0002] Calcium aluminate cement first appeared in France in late 1865. It is a calcium aluminate cement made of alumina and lime after melting and crushing. At the end of the 19th century, Britain first issued a patent for "limestone bauxitecement" cement. The first commercial production of this cement was in 1913 by Lafarge in France, and the production method was the melting method. [0003] Later, aluminate cement with aluminate minerals or aluminate composite minerals as the basic composition appeared in the shaft kiln and rotary kiln with bauxite and limestone as the main raw materials. This method is called Sintering method. Regardless of the melting method or the sintering method, its main mineral composition is monocalcium aluminate (CA) and monocalcium dialuminate (CA) ...

Claims

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Application Information

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IPC IPC(8): C04B7/32C04B7/36
CPCC04B7/153C04B2111/00206C04B7/32C04B2111/00215Y02P40/10
Inventor 柯昌明韩兵强李楠
Owner WUHAN UNIV OF SCI & TECH
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