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Modified calcium alumino-titanate refractory raw material and preparation method thereof

A calcium aluminate titanate and refractory raw material technology, applied in the field of calcium aluminate titanate, can solve the problems of limited application range, low calcination temperature, high impurity content of high alumina refractory raw materials, etc., to achieve improved chemical stability, excellent chemical stability, The effect of small thermal conductivity

Inactive Publication Date: 2018-09-04
WUHAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current reports mainly apply calcium aluminate titanate directly to other composite materials, often ignoring the adverse effects of the phase changes of calcium aluminate titanate in different material systems on the performance of composite materials
For example, "A Calcium Aluminate Titanate-High Alumina Modified Refractory Material and Its Preparation Method" (CN104609872A) and "A Calcium Aluminate Titanate Prefabricated Part for the Lining of Vanadium Smelting Reverberatory Furnace and Its Preparation Method" (CN105036774A) patents The technology is to use calcium aluminate titanate directly in combination with other raw materials, without considering the CA in calcium aluminate titanate 2 to CA 6 Effect of transformation and oxidation of trace metals titanium and iron on sintering behavior of materials
In addition, the patented technology of "regenerated high-alumina refractories with ferrotitanium slag as the main raw material and its preparation method" (CN103922772A) although the calcium aluminate titanate has been ground, calcined and acid leached, the calcining temperature is relatively low, and the Good for CA 2 to CA 6 and the acid leaching cannot eliminate the rutile phase in calcium aluminate titanate, resulting in too high impurity content in the generated high-alumina refractory raw materials, which limits the scope of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A modified calcium aluminate titanate refractory raw material and a preparation method thereof. The preparation method described in this embodiment is:

[0025] First, keep the calcium aluminate frit at 1400-1430°C for 3-4 hours, cool in the furnace, crush, and grind to a particle size of ≤0.058mm to obtain calcium aluminate powder.

[0026] Then according to the mass ratio of calcium aluminate titanate micropowder: silicon micropowder: vanadium pentoxide micropowder is 1: (0.15~0.17): (0.025~0.03), described calcium aluminate titanate micropowder, described silicon micropowder and The vanadium pentoxide micropowders are mixed and ball milled for 2-3 hours to obtain a mixture.

[0027] Then, the mixture is machine-pressed at 160-180MPa, kept at 1450-1480°C for 2-2.6 hours, cooled in a furnace, and crushed to obtain the modified calcium aluminate titanate refractory raw material.

[0028] The modified calcium aluminate titanate refractory raw material prepared in this ...

Embodiment 2

[0030] A modified calcium aluminate titanate refractory raw material and a preparation method thereof. The preparation method described in this embodiment is:

[0031] Firstly, the calcium aluminate titanate frit is kept at 1420-1450°C for 3-4 hours, cooled in the furnace, crushed, and ground to a particle size of ≤0.058mm to obtain calcium aluminate titanate powder.

[0032] Then press described calcium aluminate titanate micropowder: silicon micropowder: the mass ratio of vanadium pentoxide micropowder is 1: (0.16~0.18): (0.02~0.026), described calcium aluminate titanate micropowder, described silicon micropowder and The vanadium pentoxide micropowders are mixed and ball milled for 2-3 hours to obtain a mixture.

[0033] Then, the mixture is machine-pressed at 160-180MPa, kept at 1470-1500°C for 2.5-3.1 hours, cooled in a furnace, and crushed to obtain the modified calcium aluminate titanate refractory raw material.

[0034] The modified calcium aluminate titanate refracto...

Embodiment 3

[0036] A modified calcium aluminate titanate refractory raw material and a preparation method thereof. The preparation method described in this embodiment is:

[0037] First, keep the calcium aluminate frit at 1400-1430°C for 3-4 hours, cool in the furnace, crush, and grind to a particle size of ≤0.058mm to obtain calcium aluminate powder.

[0038] Then according to the mass ratio of calcium aluminate titanate micropowder: silicon micropowder: vanadium pentoxide micropowder is 1: (0.17~0.19): (0.015~0.021), described calcium aluminate titanate micropowder, described silicon micropowder and The vanadium pentoxide micropowders are mixed and ball milled for 2-3 hours to obtain a mixture.

[0039] Then, the mixture is machine-pressed at 160-180MPa, kept at 1450-1480°C for 3-3.6 hours, cooled in a furnace, and crushed to obtain the modified calcium aluminate titanate refractory raw material.

[0040] The modified calcium aluminate titanate refractory raw material prepared in this...

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Abstract

The invention relates to a modified calcium alumino-titanate refractory raw material and a preparation method thereof. The technical scheme of the modified calcium alumino-titanate refractory raw material is characterized in that firstly, calcium titanium aluminate melting blocks are subjected to heat insulation for 3 to 4 hours under the condition of 1,400 to 1,450 DEG C; cooling is performed along with the furnace; crushing is performed; grinding is performed until the granularity is smaller than or equal to 0.058mm, so as to obtain calcium titanium aluminate micro powder; then, the titaniumcalcium aluminate micro powder, the silicon micro powder and the vanadium pentoxide micro powder are mixed according to the mass ratio of 1 to (0.15 to 0.20) to (0.01 to 0.03); ball milling is performed for 2 to 3 hours to obtain mixed materials; then, the mixed materials are subjected to machine pressing shaping under the condition of 160 to 180 MPa; the heat insulation is performed for 2 to 4 hours under the condition of 1,450 to 1,500 DEG C; after the cooling along with the furnace, crushing is performed, and the modified calcium alumino-titanate refractory raw material is prepared. The modified calcium alumino-titanate refractory raw material has the characteristics that the resources are comprehensively used; the energy is saved; the environment is protected; the prepared modified calcium alumino-titanate refractory raw material has small heat conduction coefficient, good chemical stability and easy sintering performance.

Description

technical field [0001] The invention belongs to the technical field of calcium aluminate titanate. In particular, it relates to a modified calcium aluminate titanate refractory raw material and a preparation method thereof. Background technique [0002] Calcium aluminate titanate is widely used in ladle lining, tundish permanent layer, cement rotary kiln transition zone and vanadium reverberatory furnace lining due to its low thermal conductivity, high wear resistance and high refractoriness. However, the current reports mainly apply calcium aluminate titanate directly to other composite materials, often ignoring the adverse effects of the phase changes of calcium aluminate titanate in different material systems on the performance of composite materials. Such as "a calcium aluminate titanate-high alumina modified refractory material and its preparation method" (CN104609872A) and "a calcium aluminate titanate preform for lining a reverberatory furnace for vanadium smelting a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/44
CPCC04B35/44C04B35/66C04B2235/3239C04B2235/3418C04B2235/5436C04B2235/602C04B2235/656C04B2235/6567
Inventor 赵惠忠陈建威张寒余俊王相辉范润东
Owner WUHAN UNIV OF SCI & TECH
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