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Rotary kiln lining brick, lining composite brick and manufacturing method thereof

A rotary kiln and composite brick technology, applied in the field of rotary kiln, can solve problems such as short service life, high kiln shell temperature, and large heat loss, and achieve the effects of reducing energy consumption, lowering kiln shell temperature, and increasing product life

Active Publication Date: 2019-05-17
重庆钢铁集团矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a rotary kiln lining brick, a lining composite brick and a manufacturing method thereof, to solve the problems caused by alkali erosion, thermal shock, etc. Short service life due to spalling, high kiln shell temperature and large heat loss

Method used

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  • Rotary kiln lining brick, lining composite brick and manufacturing method thereof
  • Rotary kiln lining brick, lining composite brick and manufacturing method thereof
  • Rotary kiln lining brick, lining composite brick and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0022] Embodiment 1: The rotary kiln lining brick in this embodiment includes: 25% bauxite, 58% M45 mullite, and 17% clay in terms of mass percentage.

[0023] In the present embodiment, by mass percent, the bauxite in the heavy layer contains 54.8% Al 2 o 3 , and 2.46% Fe 2 o 3 ; M45 mullite in the heavy layer contains 45.4% Al 2 o 3 , and 1.03% Fe 2 o 3 ; The clay in the heavy layer contains 28.3% Al 2 o 3 , and 1.43% Fe 2 o 3 .

Embodiment 2

[0024] Embodiment two: the manufacture method of rotary kiln lining brick in embodiment one, comprises the following steps:

[0025] 1) After mixing bauxite and clay, co-grind in a pulverizer;

[0026] 2) Add the powder prepared by the pulverizer and M45 mullite into the wet wheel mill for mixing;

[0027] 3) Send the mixed material obtained by mixing and milling with a wet wheel mill into a 630t press for pressing to obtain the adobe lining the rotary kiln;

[0028] 4) Put the adobe into the tunnel kiln and fire at 1410°C for 8 hours to obtain the lining brick of the rotary kiln; the lining brick of the rotary kiln includes: 25% bauxite, 58% M45 mullite stone, and 17% clay.

[0029] The following table is the physical and chemical parameters of the rotary kiln lining brick that adopts manufacturing method to make in the embodiment two:

[0030]

[0031] Select the LZ-75 high-alumina bricks used on the rotary kiln, the common clay bricks and the lining bricks obtained in...

Embodiment 3

[0033] Embodiment 3: The rotary kiln lining composite brick in this embodiment includes a heavy layer 1 and a light layer 2 above the heavy layer. The heavy layer includes: bauxite 25%, M45 Mo 58% of mullite and 17% of clay, and the light layer includes 20% of floating beads, 60% of light mullite, and 20% of clay in terms of mass percentage.

[0034] In the present embodiment, by mass percent, the bauxite in the heavy layer contains 54.8% Al 2 o 3 , and 2.46% Fe 2 o 3 ; M45 mullite in the heavy layer contains 45.4% Al 2 o 3 , and 1.03% Fe 2 o 3 ; The clay in the heavy layer contains 28.3% Al 2 o 3 , and 1.43% Fe 2 o 3 .

[0035] In the present embodiment, by mass percentage, the light mullite in the light layer contains 65.8% Al 2 o 3 , 28.6% SiO 2 , and 2.3% Fe 2 o 3 ; The floating beads in the lightweight layer contain 26.8% Al 2 o 3 , 63.7% SiO 2 , and 3.5% Fe 2 o 3 .

[0036] Further, in this embodiment, the bonding surface of the heavy layer and the ...

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Abstract

The invention discloses a lining brick and composite lining brick for a rotary kiln, and manufacturing methods thereof. The lining brick for the rotary kiln comprises, by mass, 25% of bauxitic clay, 58% of M45 mullite and 17% of clay. The manufacturing method for the lining brick comprises the following steps: 1) mixing the bauxitic clay with the clay and carrying out co-grinding; and 2) conveying co-ground powder and M45 mullite to a wet type edge runner mill for mixing and grinding, etc. A composite lining brick for the rotary kiln comprises a heavy layer and a light layer located above the heavy layer. The manufacturing method for the composite lining brick comprises the following steps: 1) respectively conveying a heavy layer material and a light layer material into the wet type edge runner mill for mixing and grinding; etc. The lining brick obtained in the invention has good alkali resistance, greatly improved thermal shock stability and wear resistance and substantially prolonged service life; and the obtained lining brick can effectively reduce the temperature of the shell of the kiln, lowers heat loss, decreases energy consumption of the rotary kiln, reduces the weight of the lining of the rotary kiln and facilitates operation of the rotary kiln.

Description

technical field [0001] The invention relates to the technical field of rotary kilns, in particular to a lining material of a rotary kiln and a manufacturing method thereof. Background technique [0002] Large-scale rotary kilns are more and more used in industrial production because of their large output, stable production, and uniform calcination of products. In addition to the cement industry, activated lime calcination, chromium salt sintering, and alkali-lime sintering are used to produce alumina. etc. all use large rotary kilns. [0003] Most of the refractories lining the rotary kiln are high-alumina bricks, which are affected by K during use. 2 O, Na 2 The erosion of alkaline substances such as O and CaO will cause the brick body to expand and loose; in addition, ordinary high-alumina bricks have defects such as poor thermal shock resistance and easy peeling and wear, so that the service life of the firing zone of the existing rotary kiln lining is mostly in the 6-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/185C04B35/622C04B33/135F27B7/28
CPCC04B33/1352C04B35/185C04B35/622C04B35/66C04B2235/3217C04B2235/349C04B2235/96C04B2235/9623F27B7/28Y02P40/60
Inventor 李兴程国建杜春天谭春凡甘乐才
Owner 重庆钢铁集团矿业有限公司
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