Mullite silicon carbide complex-phase fireproof material and preparation method thereof

Abstract

The invention relates to a mullite silicon carbide complex-phase fireproof material and a preparation method thereof. The mullite silicon carbide complex-phase fireproof material is characterized in that 48-60wt% of coating cladding mullite light aggregate, 9-15wt% of coating cladding silicon carbide aggregate, 6-12wt% of top-grade bauxite fine powder, 4-8wt% of andalusite fine powder, 3-5wt% of alpha-Al2O3 micro powder, 4-8wt% of Guangxi white clay, 1-3wt% of SiO2 micro powder, 4-6wt% of Si powder and 0.5-2wt% of Al powder are used as raw materials. The preparation method comprises the following steps of firstly mixing two kinds of the aggregate in the raw materials, adding a bonding agent, then performing mixed refining on the mixed aggregate, the bonding agent and other raw materials, performing material trapping, performing compression moulding, performing drying, and performing baking under the condition of 1250-1400 DEG C so as to obtain the mullite silicon carbide complex-phase fireproof material. The mullite silicon carbide complex-phase fireproof material prepared by the preparation method disclosed by the invention has the excellent characteristics of being low in heat conduction coefficients, good in erosion resistance, and high in intensity.

Description

technical field

[0001] The invention belongs to the technical field of silicon carbide-containing multiphase refractory materials. In particular, it relates to a mullite silicon carbide composite refractory material and a preparation method thereof. Background technique

[0002] With the gradual increase of China's cement production, the cement industry's consumption of fossil energy has received more and more attention. Cement rotary kiln is an important equipment for cement firing, and its energy consumption often determines the energy consumption of the entire cement production system. Among them, the transition zone and the firing zone become the fastest heat dissipation parts due to the higher local temperature. In recent years, in order to reduce the consumption of fossil energy, the cement industry has adopted a large number of industrial solid waste and domestic waste as alternative fuels. However, components such as alkali, chlorine, and sulfur in these fuels are ...

Examples

Embodiment 1

[0034] A mullite silicon carbide composite refractory material and a preparation method thereof. The raw materials and content of the mullite silicon carbide composite refractory material are:

[0035]

[0036] The preparation method of the mullite silicon carbide composite refractory material is as follows: batching is carried out according to the above-mentioned raw materials and their contents, and the coating-coated mullite lightweight aggregate and the coating-coated silicon carbide aggregate are mixed for 3 ~ After 4 minutes, add 3-4wt% dextrin of the raw material, knead for 4-6 minutes, and prepare the mixture. Then add special-grade bauxite fine powder, andalusite fine powder and premixed powder into the mixture, and knead for 12 to 16 minutes to make mud. The mud is trapped for 24-30 hours, pressed and formed under the condition of 20-30MPa, dried at 90-100°C, and fired at 1250-1300°C to obtain the mullite silicon carbide composite phase refractory material.

[...

Embodiment 2

[0039] A mullite silicon carbide composite refractory material and a preparation method thereof. The raw materials and content of the mullite silicon carbide composite refractory material are:

[0040]

[0041]

[0042] The preparation method of the mullite silicon carbide composite refractory material is as follows: batching is carried out according to the above-mentioned raw materials and their contents, and the coating-coated mullite lightweight aggregate and the coating-coated silicon carbide aggregate are mixed for 4~ After 5 minutes, 3.5-4.5 wt % calcium lignosulfonate of the raw material is added, and kneaded for 5-7 minutes to prepare a mixture. Then add special-grade bauxite fine powder, andalusite fine powder and premixed powder into the mixture, and knead for 14 to 18 minutes to make mud. The mud is trapped for 30-36 hours, pressed and formed under the condition of 30-40MPa, dried at 100-110°C, and fired at 1300-1350°C to obtain the mullite silicon carbide co...

Embodiment 3

[0045] A mullite silicon carbide composite refractory material and a preparation method thereof. The raw materials and content of the mullite silicon carbide composite refractory material are:

[0046]

[0047] The preparation method of the mullite silicon carbide composite refractory material is as follows: batching is carried out according to the above-mentioned raw materials and their contents, and the coating-coated mullite lightweight aggregate and the coating-coated silicon carbide aggregate are mixed for 3 ~ After 4 minutes, add 4-5 wt% aluminum dihydrogen phosphate solution of the raw material, and knead for 4-6 minutes to form a mixture. Then add special-grade bauxite fine powder, andalusite fine powder and premixed powder into the mixture, and knead for 12 to 16 minutes to make mud. The mud is trapped for 24-30 hours, pressed and formed under the condition of 40-50MPa, dried at 90-100°C, and fired at 1350-1400°C to obtain the mullite silicon carbide composite pha...

technical field

[0001] The invention belongs to the technical field of silicon carbide-containing multiphase refractory materials. In particular, it relates to a mullite silicon carbide composite refractory material and a preparation method thereof. Background technique

[0002] With the gradual increase of China's cement production, the cement industry's consumption of fossil energy has received more and more attention. Cement rotary kiln is an important equipment for cement firing, and its energy consumption often determines the energy consumption of the entire cement production system. Among them, the transition zone and the firing zone become the fastest heat dissipation parts due to the higher local temperature. In recent years, in order to reduce the consumption of fossil energy, the cement industry has adopted a large number of industrial solid waste and domestic waste as alternative fuels. However, components such as alkali, chlorine, and sulfur in these fuels are ...

Examples

Embodiment 1

[0034] A mullite silicon carbide composite refractory material and a preparation method thereof. The raw materials and content of the mullite silicon carbide composite refractory material are:

[0035]

[0036] The preparation method of the mullite silicon carbide composite refractory material is as follows: batching is carried out according to the above-mentioned raw materials and their contents, and the coating-coated mullite lightweight aggregate and the coating-coated silicon carbide aggregate are mixed for 3 ~ After 4 minutes, add 3-4wt% dextrin of the raw material, knead for 4-6 minutes, and prepare the mixture. Then add special-grade bauxite fine powder, andalusite fine powder and premixed powder into the mixture, and knead for 12 to 16 minutes to make mud. The mud is trapped for 24-30 hours, pressed and formed under the condition of 20-30MPa, dried at 90-100°C, and fired at 1250-1300°C to obtain the mullite silicon carbide composite phase refractory material.

[...

Embodiment 2

[0039] A mullite silicon carbide composite refractory material and a preparation method thereof. The raw materials and content of the mullite silicon carbide composite refractory material are:

[0040]

[0041]

[0042] The preparation method of the mullite silicon carbide composite refractory material is as follows: batching is carried out according to the above-mentioned raw materials and their contents, and the coating-coated mullite lightweight aggregate and the coating-coated silicon carbide aggregate are mixed for 4~ After 5 minutes, 3.5-4.5 wt % calcium lignosulfonate of the raw material is added, and kneaded for 5-7 minutes to prepare a mixture. Then add special-grade bauxite fine powder, andalusite fine powder and premixed powder into the mixture, and knead for 14 to 18 minutes to make mud. The mud is trapped for 30-36 hours, pressed and formed under the condition of 30-40MPa, dried at 100-110°C, and fired at 1300-1350°C to obtain the mullite silicon carbide co...

Embodiment 3

[0045] A mullite silicon carbide composite refractory material and a preparation method thereof. The raw materials and content of the mullite silicon carbide composite refractory material are:

[0046]

[0047] The preparation method of the mullite silicon carbide composite refractory material is as follows: batching is carried out according to the above-mentioned raw materials and their contents, and the coating-coated mullite lightweight aggregate and the coating-coated silicon carbide aggregate are mixed for 3 ~ After 4 minutes, add 4-5 wt% aluminum dihydrogen phosphate solution of the raw material, and knead for 4-6 minutes to form a mixture. Then add special-grade bauxite fine powder, andalusite fine powder and premixed powder into the mixture, and knead for 12 to 16 minutes to make mud. The mud is trapped for 24-30 hours, pressed and formed under the condition of 40-50MPa, dried at 90-100°C, and fired at 1350-1400°C to obtain the mullite silicon carbide composite pha...

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