Ultra-high strength lightweight heat insulating brick for roasting furnace and preparation method thereof

A light-weight heat-insulating, ultra-high-strength technology, applied in the field of heat-insulating bricks, can solve problems such as short service life of the roasting furnace, deformation of the furnace flue wall, and complicated preparation process, and achieve good heat insulation effect and low production cost , The effect of scientific preparation technology

Inactive Publication Date: 2018-12-14
山东潍耐节能材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing clay heat insulating bricks have the disadvantages of low compressive strength, deformation of the flue wall of the roasting furnace, short service life of the roasting furnace, complicated preparation process, and high preparation cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An ultra-high-strength lightweight heat-insulating brick for roasting furnaces, which is prepared from the following raw materials: 15% mullite powder, 10% alumina powder, 8% calcium hexaaluminate, 15% high alumina bauxite, and 45% clay %, 5% floating beads, 5% sawdust, 5% binder.

[0028] Its preparation method comprises the following steps:

[0029] (1) Take mullite powder, alumina powder, calcium hexaaluminate, high alumina bauxite, clay, floating beads and sawdust in proportion, and mix them evenly to make a mixture;

[0030] (2) adding sawdust and water to the mixture, and kneading for 15 minutes to obtain mud;

[0031] (3) the mud material is extruded in an extruder, and the extruding pressure is 2Mpa, which is cut to obtain adobe;

[0032] (4) Drying the adobe, the drying is divided into two stages, the first stage is low-temperature drying, the drying temperature is 30°C, and the drying time is 22h; the second stage is high-temperature drying, the drying tempe...

Embodiment 2

[0036] An ultra-high-strength lightweight heat-insulating brick for roasting furnaces, which is prepared from the following raw materials: 20% mullite powder, 8% alumina powder, 10% calcium hexaaluminate, 13% high alumina bauxite, and 40% clay %, 8% floating beads, 4% sawdust, 6% binder.

[0037] Its preparation method comprises the following steps:

[0038] (1) Take mullite powder, alumina powder, calcium hexaaluminate, high alumina bauxite, clay, floating beads and sawdust in proportion, and mix them evenly to make a mixture;

[0039] (2) sawdust and water were added to the mixture, and mixed for 16 minutes to obtain mud;

[0040] (3) the mud material is extruded in an extruder, and the extruding pressure is 3Mpa, which is cut to obtain adobe;

[0041] (4) Drying the adobe, the drying is divided into two stages, the first stage is low-temperature drying, the drying temperature is 25°C, and the drying time is 28h; the second stage is high-temperature drying, the drying temp...

Embodiment 3

[0045] An ultra-high-strength lightweight heat-insulating brick for roasting furnaces, which is prepared from the following raw materials: 25% mullite powder, 6% alumina powder, 15% calcium hexaaluminate, 12% high alumina bauxite, and 35% clay %, floating beads 12%, sawdust 3%, binder 8%.

[0046] Its preparation method comprises the following steps:

[0047] (1) Take mullite powder, alumina powder, calcium hexaaluminate, high alumina bauxite, clay, floating beads and sawdust in proportion, and mix them evenly to make a mixture;

[0048] (2) Add sawdust and water to the mixture, and knead for 18 minutes to obtain mud;

[0049] (3) the mud material is extruded in an extruder, and the extruding pressure is 4Mpa, which is cut to obtain adobe;

[0050] (4) Drying after molding, the drying is divided into two stages, the first stage is low-temperature drying, the drying temperature is 35°C, and the drying time is 18h; the second stage is high-temperature drying, the drying temper...

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Abstract

The invention relates to the technical field of heat insulating bricks, and in particular, relates to an ultra-high strength lightweight heat insulating brick for a roasting furnace and a preparationmethod thereof. The heat insulating brick is prepared from the following raw materials by weight: 15-30% of mullite powder, 5-10% of alumina powder, 8-20% of calcium hexaaluminate, 10-15% of high-alumina bauxite, 30-45% of clay, 5-15% of floating beads, 2-5% of wood sawdust and 5-10% of a binder. The prepared heat insulating brick has the advantages of high compressive strength, high temperature resistance, small thermal conductivity coefficient, small volume density, good heat-insulation and heat-preservation effects and high stability, makes the temperature distribution in a furnace chambermore uniform, and is conducive to improvement of the product quality; and the preparation technology is scientific, reasonable, efficient, simple, and low in production cost, greatly improves the capacity of the roasting furnace, and is conducive to promotion and application.

Description

technical field [0001] The invention relates to the technical field of heat-insulating bricks, in particular to an ultra-high-strength lightweight heat-insulating brick for a roasting furnace and a preparation method thereof. Background technique [0002] In recent years, there are more and more large-scale roasting furnaces, with high roasting temperature and short roasting cycle. Due to the high temperature effect of the electrode box heating wall and other parts and the temperature change during the roasting cycle, due to the complex force of the heat insulating brick used in the furnace bottom of the roasting furnace and the influence of the above-mentioned factors, the heat insulating brick used in the roasting furnace bottom has become the best choice in the roasting furnace. The easiest and first damaged part, the life of the heat insulation bricks for the bottom of the roaster determines the service life of the entire roaster. [0003] For insulation bricks, the mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/08C04B38/06C04B33/13C04B33/04
CPCC04B33/04C04B33/13C04B38/0675C04B38/08C04B2235/3217C04B2235/3463C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607C04B38/0067
Inventor 孙伟
Owner 山东潍耐节能材料有限公司
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