Method for manufacturing silicon mullite brick by adopting bauxite tailings

Abstract

The present invention particularly relates to a method for manufacturing a silicon mullite brick by adopting bauxite tailings so as to solve a problem of high raw material cost of the existing silicon mullite brick. According to the method for manufacturing the silicon mullite brick by adopting bauxite tailings, bauxite tailings is adopted to replace mullite with expensive cost to be adopted as a main raw material, and is matched with silicon carbide and other materials, and high-pressure molding and medium temperature firing are performed to obtain the silicon mullite brick. The method has characteristics of comprehensive resource utilization, energy saving and environmental protection. The obtained silicon mullite brick has advantages of high compressive strength at a room temperature and low cost, wherein a compressive strength of the product achieves 115-137 MPa, thermal shock resistance under a 1100 DEG C water cooling condition achieves 60-110 times, room temperature wear resistance achieves 9-13 cm<3>, and content, bulk density, apparent porosity, and refractoriness under load of alumina are higher than the national standards.

Description

technical field

[0001] The invention relates to a method for manufacturing silica bricks for a rotary kiln, in particular to a method for manufacturing silica bricks using bauxite tailings. Background technique

[0002] Traditional bauxite tailings are aluminum-containing wastes produced during the mining of bauxite mines, which belong to bauxite-associated mines. In the existing bauxite tailings, the main mineral is a transition between kaolin and talc Type mineral resources, Al 2 o 3 The content is generally between 40% and 60%, and then according to SiO 2 and Fe 2 o 3d The difference in content is subdivided into two categories, one is high iron tailings, namely Fe 2 o 3 Content greater than 2%, SiO 2 The content is greater than 25%; the other is low-iron tailings, namely Fe 2 o 3 The content is about 1%, SiO 2 The content is about 30%. In the past, this kind of associated ore was often discarded because the above two impurities were too high, which not only ca...

Examples

Embodiment 1

[0010] The silica brick manufacturing method using bauxite tailings uses bauxite tailings with silica content higher than 50%, aluminum oxide content lower than 40%, and ferric oxide content lower than 0.7% as raw materials. First, the raw materials are broken into particles with a particle size of less than 3mm, and a part of them is ground into a fine powder with a particle size of less than 200 mesh. After mixing and stirring 60 parts of the particles and 33 parts of the fine powder, they are pressed into a block with a press, and then subjected to 1460 ℃ high temperature sintering, part of the raw material after sintering is crushed into aggregate I with a particle size of less than 1mm, aggregate II with a particle size of 1~3mm, and aggregate III with a particle size of 3~5mm, and the other part is ground into granules Processed fine powder with a diameter below 200 mesh, take 17 parts of aggregate I, 23 parts of aggregate II, 28 parts of aggregate III, 40 parts of proces...

Embodiment 2

[0012] The silica brick manufacturing method using bauxite tailings uses bauxite tailings with silica content higher than 50%, aluminum oxide content lower than 40%, and ferric oxide content lower than 0.7% as raw materials. First, the raw materials are broken into particles with a particle size of less than 3mm, and a part of them is ground into a fine powder with a particle size of less than 200 meshes. After mixing and stirring, 62 parts of the particles and 35 parts of the fine powder are pressed into a block with a press, and then subjected to 1500 ℃ high temperature sintering, part of the raw material after sintering is crushed into aggregate I with a particle size of less than 1mm, aggregate II with a particle size of 1~3mm, and aggregate III with a particle size of 3~5mm, and the other part is ground into granules For processed fine powder with a diameter below 200 mesh, take 20 parts of aggregate I, 27 parts of aggregate II, 23 parts of aggregate III, 42 parts of proce...

Embodiment 3

[0014] The silica brick manufacturing method using bauxite tailings uses bauxite tailings with silica content higher than 50%, aluminum oxide content lower than 40%, and ferric oxide content lower than 0.7% as raw materials. First, the raw materials are broken into particles with a particle size of less than 3mm, and a part of them is ground into a fine powder with a particle size of less than 200 mesh. After mixing and stirring 64 parts of the particles and 37 parts of the fine powder, they are pressed into a block with a press, and then passed through 1530 ℃ high temperature sintering, part of the raw material after sintering is crushed into aggregate I with a particle size of less than 1mm, aggregate II with a particle size of 1~3mm, and aggregate III with a particle size of 3~5mm, and the other part is ground into granules Processed fine powder with a diameter of less than 200 mesh, take 22 parts of aggregate I, 14 parts of aggregate II, 24 parts of aggregate III, 44 parts ...

technical field

[0001] The invention relates to a method for manufacturing silica bricks for a rotary kiln, in particular to a method for manufacturing silica bricks using bauxite tailings. Background technique

[0002] Traditional bauxite tailings are aluminum-containing wastes produced during the mining of bauxite mines, which belong to bauxite-associated mines. In the existing bauxite tailings, the main mineral is a transition between kaolin and talc Type mineral resources, Al 2 o 3 The content is generally between 40% and 60%, and then according to SiO 2 and Fe 2 o 3d The difference in content is subdivided into two categories, one is high iron tailings, namely Fe 2 o 3 Content greater than 2%, SiO 2 The content is greater than 25%; the other is low-iron tailings, namely Fe 2 o 3 The content is about 1%, SiO 2 The content is about 30%. In the past, this kind of associated ore was often discarded because the above two impurities were too high, which not only ca...

Examples

Embodiment 1

[0010] The silica brick manufacturing method using bauxite tailings uses bauxite tailings with silica content higher than 50%, aluminum oxide content lower than 40%, and ferric oxide content lower than 0.7% as raw materials. First, the raw materials are broken into particles with a particle size of less than 3mm, and a part of them is ground into a fine powder with a particle size of less than 200 mesh. After mixing and stirring 60 parts of the particles and 33 parts of the fine powder, they are pressed into a block with a press, and then subjected to 1460 ℃ high temperature sintering, part of the raw material after sintering is crushed into aggregate I with a particle size of less than 1mm, aggregate II with a particle size of 1~3mm, and aggregate III with a particle size of 3~5mm, and the other part is ground into granules Processed fine powder with a diameter below 200 mesh, take 17 parts of aggregate I, 23 parts of aggregate II, 28 parts of aggregate III, 40 parts of proces...

Embodiment 2

[0012] The silica brick manufacturing method using bauxite tailings uses bauxite tailings with silica content higher than 50%, aluminum oxide content lower than 40%, and ferric oxide content lower than 0.7% as raw materials. First, the raw materials are broken into particles with a particle size of less than 3mm, and a part of them is ground into a fine powder with a particle size of less than 200 meshes. After mixing and stirring, 62 parts of the particles and 35 parts of the fine powder are pressed into a block with a press, and then subjected to 1500 ℃ high temperature sintering, part of the raw material after sintering is crushed into aggregate I with a particle size of less than 1mm, aggregate II with a particle size of 1~3mm, and aggregate III with a particle size of 3~5mm, and the other part is ground into granules For processed fine powder with a diameter below 200 mesh, take 20 parts of aggregate I, 27 parts of aggregate II, 23 parts of aggregate III, 42 parts of proce...

Embodiment 3

[0014] The silica brick manufacturing method using bauxite tailings uses bauxite tailings with silica content higher than 50%, aluminum oxide content lower than 40%, and ferric oxide content lower than 0.7% as raw materials. First, the raw materials are broken into particles with a particle size of less than 3mm, and a part of them is ground into a fine powder with a particle size of less than 200 mesh. After mixing and stirring 64 parts of the particles and 37 parts of the fine powder, they are pressed into a block with a press, and then passed through 1530 ℃ high temperature sintering, part of the raw material after sintering is crushed into aggregate I with a particle size of less than 1mm, aggregate II with a particle size of 1~3mm, and aggregate III with a particle size of 3~5mm, and the other part is ground into granules Processed fine powder with a diameter of less than 200 mesh, take 22 parts of aggregate I, 14 parts of aggregate II, 24 parts of aggregate III, 44 parts ...