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Rotary kiln refractory material

A refractory material and rotary kiln technology, applied in the field of refractory materials, can solve the problems of difficult to obtain high-purity and high-quality products, difficult to promote, poor chemical stability, etc., to achieve enhanced wear resistance and anti-oxidation effects, conducive to noise reduction, excellent The effect of sound absorption

Inactive Publication Date: 2019-06-11
JIANGSU DELONG NICKEL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention patent utilizes the hydration ability of magnesium sulfate, but magnesium sulfate will decompose when heated to 700°C-800°C, the chemical stability is not good, and due to the restriction of raw ore quality, it is difficult to obtain high-purity and high-quality products, and it is difficult to widely promote

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A rotary kiln refractory material proposed by the present invention includes the following raw materials in parts by weight: the refractory material in a rotary kiln includes the following raw materials in parts by weight: 75 parts of bauxite, 2 parts of aluminum silicate fiber, 6 parts of silicon, 3 parts of calcium hexaboride, 8 parts of water, and 6 parts of zirconium nitride.

[0016] The raw materials are dry-mixed and stirred by a mixer for 1 minute, and then enough water is added at one time, and wet-stirred for 3 minutes, and the mixed material is fully mixed to obtain a mixed material, which is effective within 30 minutes.

[0017] The melting point of silicon dioxide is 1650°C, the boiling point is 2230°C, the melting point of the calcium hexaboride is 2235°C, the relative density is 2.33g / cm3, and the Mohs hardness is 9.

[0018] The melting point of zirconium nitride is 2930°C, and the weight ratio of calcium hexaboride and zirconium nitride is 1:2.

Embodiment 2

[0020] A rotary kiln refractory material proposed by the present invention comprises the following raw materials in parts by weight: 70 parts of bauxite, 3 parts of aluminum silicate fiber, 8 parts of silicon dioxide, 3 parts of calcium hexaboride, 10 parts of water, nitriding 6 parts of zirconium.

[0021] The raw materials are dry mixed and stirred by a mixer for 3 minutes, and then enough water is added at one time, wet stirred for 5 minutes, and mixed thoroughly to obtain a mixed material, which is effective within 30 minutes.

[0022] The melting point of silicon dioxide is 1700°C, the boiling point is 2230°C, the melting point of calcium hexaboride is 2235°C, the relative density is 2.33g / cm3, and the Mohs hardness is 9.

[0023] The melting point of zirconium nitride is 3030°C, and the weight ratio of calcium hexaboride and zirconium nitride is 1:2.

Embodiment 3

[0025] A rotary kiln refractory material proposed by the present invention includes the following raw materials in parts by weight: 73 parts of bauxite, 1 part of aluminum silicate fiber, 6 parts of silicon dioxide, 4 parts of calcium hexaboride, 8 parts of water, nitriding 8 parts of zirconium.

[0026] The raw materials are dry mixed and stirred by a mixer for 2 minutes, and then enough water is added at one time, wet stirred for 4 minutes, and the mixed material is fully mixed to obtain a mixed material, which is effective within 30 minutes.

[0027] The melting point of silicon dioxide is 1600°C, the boiling point is 2230°C, the melting point of calcium hexaboride is 2235°C, the relative density is 2.33g / cm3, and the Mohs hardness is 9.

[0028] The melting point of zirconium nitride is 2980°C, and the weight ratio of calcium hexaboride and zirconium nitride is 1:2.

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Abstract

The invention discloses a rotary kiln refractory material, comprising the following raw materials in parts by weight: 70-80 parts of bauxite, 1-3 parts of aluminum silicate fiber, 6-8 parts of silicondioxide, 3-6 parts of calcium hexaboride, 8-10 parts of water, and 6-12 parts of zirconium nitride. The rotary kiln refractory material proposed by the invention adopts bauxite as a main raw materialwhich is low in cost and convenient to obtain, and the bauxite has stable chemical properties and good physical properties. Aluminum silicate fiber is added as a raw material interstitial filler, hasgood thermal stability, thermal shock resistance and excellent sound absorption, and is conducive to silencing of a rotary kiln. Calcium hexaboride is added as an antioxidant to achieve the antioxidant effect of the refractory material and improve the corrosion resistance of the refractory material, and enables the refractor material to be stable in properties, and at the same time, to be non-flammable and non-toxic during application. Zirconium nitride is added to enhance the wear resistance and oxidation resistance of the refractory material and prolong the service life.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a rotary kiln refractory material. Background technique [0002] The rotary kiln is not only used for calcining cement clinker, but also for calcining clay, limestone and drying slag. Since the calcining temperature in the furnace is above 1,000 degrees Celsius when the rotary kiln is calcining raw materials, it is necessary to use refractory The material is used as the inner lining of the kiln body to protect the kiln wall. The refractory material has a higher melting point and can protect the inner wall of the rotary kiln. [0003] The main raw material resources of the existing refractory materials are few, the source is limited and mining is inconvenient, the material cost is high, and the acquisition is inconvenient; the thermal stability of refractory materials is poor and does not have thermal shock resistance, and the poor sound absorption is not conducive to the noise...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 周国忠石斌龙顾志玉
Owner JIANGSU DELONG NICKEL IND CO LTD
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