CN113184865A - Sintered mullite production process - Google Patents
Sintered mullite production process Download PDFInfo
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- CN113184865A CN113184865A CN202110579748.1A CN202110579748A CN113184865A CN 113184865 A CN113184865 A CN 113184865A CN 202110579748 A CN202110579748 A CN 202110579748A CN 113184865 A CN113184865 A CN 113184865A
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- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
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Abstract
The invention discloses a sintered mullite production process, which comprises the following raw materials: bauxite, silica. The mullite raw material is selected from bauxite and silica, and the prepared product has the characteristics of large volume density, good thermal shock stability, small high-temperature creep value, good chemical corrosion resistance and stable quality.
Description
Technical Field
The invention relates to the technical field of mullite production processes, in particular to a sintered mullite production process.
Background
Mullite is a high-quality refractory raw material, and minerals of the kind are rare. Mullite is a mineral formed by aluminosilicate at high temperature, and mullite is formed when aluminosilicate is artificially heated. Natural mullite crystals are elongated needles and in the form of radioactive clusters. Mullite ore is used to produce high temperature refractories. The composite material is used as a thermal barrier coating in C/C composite materials and has wide application. Mullite Al2O3-SiO2A binary solid solution stable in the element system under normal pressure, the chemical formula is Al2O3-SiO2Very little natural mullite.
The mullite raw material is processed to generate the mullite after being screened and mixed. Therefore, the sintered mullite production process is provided.
Disclosure of Invention
The invention aims to provide a sintered mullite production process, which solves the problem that mullite is not easy to process a mullite raw material to generate mullite.
In order to solve the technical problems, the invention adopts the following technical scheme:
a sintered mullite production process comprises the following raw materials: bauxite, silica.
Further, the method comprises the following steps of; the bauxite grain size is selected to be 1mm or less and 1 to 3mm or less, and the silica grain size is selected to be 2.5 to 6 mm.
Further, the method comprises the following steps of; the raw materials comprise the following components in parts by mass: 70-80 parts of bauxite with the particle size of less than or equal to 1mm, 15-20 parts of bauxite with the particle size of 1-3mm and 8-12 parts of silica.
Further, the method comprises the following steps of; the preparation method comprises the following steps:
crushing raw materials A: respectively lifting bauxite and silica raw materials into a crushing device for primary crushing, carrying out fine crushing again after the primary crushing, carrying out screening after the crushing, and then feeding into a ball milling device after the screening;
homogenizing and extruding the raw materials B: b, feeding the raw materials of the bauxite with the particle size of less than or equal to 1mm and the bauxite with the particle size of 1-3mm which are subjected to ball milling in the step A into a homogenizing device according to the formula amount, adding water for homogenizing, wherein the mass ratio of the raw materials of the bauxite and the silica to the water is as follows: 1: 2.5-4, homogenizing, then feeding into a filter pressing device for filter pressing, then feeding into a vacuum mud extruding device for mud extruding after filter pressing, drying after mud extruding, wherein the drying temperature is 80-100 ℃, and the drying time is as follows: 1-3 h;
c, high-temperature calcination: b, the dried raw materials enter a rotary kiln for high-temperature calcination at the temperature of 1400 ℃ and 1800 ℃;
d, cooling a product: c, cooling the product prepared in the step C in a rotary kiln for 2-4h, then removing the product in the rotary kiln out of a cooling device for cooling, and gradually cooling in the cooling device, wherein the temperature in the cooling device is 100-260 ℃/h;
e, crushing a product: c, crushing the product cooled in the step D, screening after crushing, and screening products with the size less than or equal to 1.5 mm;
f, product inspection: and E, performing qualification inspection on the product cooled in the step E.
Further, the method comprises the following steps of; in the step C, the high-temperature calcination time at 1400-1650 ℃ is 4-8 h; 1650 and 1800 ℃ for 4-6 h.
Further, the method comprises the following steps of; removing iron from the ball-milled raw materials in the step A and the screened products in the step E;
in step A, B, C, D, cloth bag dust removal is adopted, and desulfurization treatment is also carried out during dust removal in calcination.
Further, the method comprises the following steps of; the homogenizing device comprises a homogenizing box;
a liquid inlet pipe is connected in the homogenizing box, the homogenizing box is connected with a feeding channel, the top of the feeding channel is connected with a storage hopper, the bottom of the feeding channel is provided with a first filter screen plate, the side wall of the feeding channel is provided with a slide rail, a driving shaft is arranged in the slide rail and is connected with a first motor, the driving shaft is connected with a driving rod, and the driving rod is connected with a crushing blade and a first scraper blade;
the homogenizing box of homogenizing case lateral wall lower part is provided with the second and filters the otter board, and the homogenizing case of second filter otter board department is provided with the collection box, collects the box and connects the output tube, is provided with the control valve on the output tube.
Further, the method comprises the following steps of; a rotating shaft is arranged in the homogenizing box and connected with a second motor, a stirring paddle is arranged on the rotating shaft, and a second scraper blade is arranged on the stirring paddle;
one side of the homogenizing box is connected with a middle pipe, the middle pipe is connected to the feeding channel, and a power pump is arranged on the middle pipe.
Further, the method comprises the following steps of; in the step C, the rotary kiln comprises a rotary kiln body, the rotary kiln body is obliquely arranged, the lower end of the rotary kiln body is connected with a rotary kiln hood, the rotary kiln hood is connected with a fuel device, the lower part of the rotary kiln hood is connected with a finished product discharging channel, and the higher end of the rotary kiln body is connected with a raw material bin;
the intermediate passage is connected to former feed bin, and the feeder hopper is connected to the intermediate passage, and the feeder hopper sets up through intermediate passage and former feed bin intercommunication, has set gradually down the flitch by last under to in the former feed bin.
Further, the method comprises the following steps of; the power mechanism comprises a gear ring arranged in the middle of the rotary kiln body, a driving gear is meshed with the bottom of the gear ring, and a driving motor is connected to the driving gear;
be provided with supplementary track on the outer wall of rotary kiln body, supplementary track setting is provided with the auxiliary wheel at rotary kiln body both ends, and the auxiliary wheel is provided with auxiliary wheel at the inside rotary motion of auxiliary track in the cooperation of supplementary track.
Compared with the prior art, the invention has at least one of the following beneficial effects:
1. bauxite and silica are selected as raw materials of the mullite, and the prepared product has the characteristics of large volume density, good thermal shock stability, small high-temperature creep value, good chemical corrosion resistance and stable quality.
2. The particle size of bauxite is selected to be less than or equal to 1mm and 1-3mm during preparation, and the particle size of silica is selected to be 2.5-6mm during preparation; the raw materials are convenient to mix well, and the generated mullite has good performance and stability.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic view of the structure of a feed channel in the present invention.
Fig. 3 is a schematic structural view of a rotary kiln body according to the present invention.
In the figure: the device comprises a homogenizing box 1, a liquid inlet pipe 2, a feeding channel 3, a first filter screen plate 4, a storage hopper 5, a sliding rail 6, a driving shaft 7, a first motor 8, a driving rod 9, a crushing blade 10, a first scraping plate 11, a second filter screen plate 12, a collecting box 13, an output pipe 14, a control valve 15, a rotating shaft 16, a second motor 17, a stirring paddle 18, a second scraping plate 19, an intermediate pipe 20, a power pump 21, a rotary kiln body 22, a rotary kiln hood 23, a fuel device 24, a raw material bin 25, a feeding hopper 26, a discharging plate 27, a gear ring 28, a driving gear 29, a driving motor 30, an auxiliary rail 31, an auxiliary wheel 32, an intermediate channel 33 and a finished material discharging channel 34.
Detailed Description
Fig. 1 to 3 illustrate the present invention, so that the objects, technical solutions and advantages of the present invention can be more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1:
a sintered mullite production process comprises the following raw materials: bauxite, silica; bauxite and silica are selected as raw materials of the mullite, and the prepared product has the characteristics of large volume density, good thermal shock stability, small high-temperature creep value, good chemical corrosion resistance and stable quality.
Example 2:
on the basis of example 1, the particle size of bauxite was selected to be both 1mm or less and 1 to 3mm, and the particle size of silica was selected to be 2.5 to 6 mm; the particle size of bauxite is selected to be less than or equal to 1mm and 1-3mm during preparation, and the particle size of silica is selected to be 2.5-6mm during preparation; the raw materials are convenient to mix well, and the generated mullite has good performance and stability.
Example 3:
on the basis of the embodiment 1-2, the raw materials comprise the following components in parts by mass: 70 parts of bauxite with the particle size of less than or equal to 1mm, 15 parts of bauxite with the particle size of 1-3mm and 8 parts of silica; when the bauxite and the silica are prepared, the selection of the mass parts is convenient, the generated mullite has the characteristics of good thermal shock stability, small high-temperature creep value and good chemical corrosion resistance, and the quality is stable.
Example 4:
on the basis of the examples 1 to 3, the raw materials in parts by mass are as follows: 80 parts of bauxite with the particle size of less than or equal to 1mm, 20 parts of bauxite with the particle size of 1-3mm and 12 parts of silica; when the bauxite and the silica are prepared, the selection of the mass parts is convenient, the generated mullite has the characteristics of good thermal shock stability, small high-temperature creep value and good chemical corrosion resistance, and the quality is stable.
Example 5:
on the basis of the examples 1 to 4, the raw materials are calculated by mass parts as follows: 75 parts of bauxite with the particle size of less than or equal to 1mm, 17 parts of bauxite with the particle size of 1-3mm and 10 parts of silica; when the bauxite and the silica are prepared, the selection of the mass parts is convenient, the generated mullite has the characteristics of good thermal shock stability, small high-temperature creep value and good chemical corrosion resistance, and the quality is stable.
Example 6:
on the basis of examples 1 to 5, the preparation method is as follows:
crushing raw materials A: respectively lifting bauxite and silica raw materials into a crushing device for primary crushing, carrying out fine crushing again after the primary crushing, carrying out screening after the crushing, and then feeding into a ball milling device after the screening;
homogenizing and extruding the raw materials B: b, feeding the raw materials of the bauxite with the particle size of less than or equal to 1mm and the bauxite with the particle size of 1-3mm which are subjected to ball milling in the step A into a homogenizing device according to the formula amount, adding water for homogenizing, wherein the mass ratio of the raw materials of the bauxite and the silica to the water is as follows: 1: 4, homogenizing, then entering a filter pressing device for filter pressing, after filter pressing, entering a vacuum mud extruding device for extruding mud, drying after mud extruding, wherein the drying temperature is 100 ℃, and the drying time is as follows: 3 h;
c, high-temperature calcination: b, putting the dried raw materials into a rotary kiln for high-temperature calcination at 1800 ℃;
d, cooling a product: c, cooling the product prepared in the step C in a rotary kiln for 4h, then moving the product in the rotary kiln out of a cooling device for cooling, and gradually cooling in the cooling device to 260 ℃/h;
e, crushing a product: c, crushing the product cooled in the step D, screening after crushing, and screening products with the size less than or equal to 1.5 mm;
f, product inspection: e, performing qualification inspection on the product cooled in the step E;
bauxite and silica raw materials are respectively lifted and enter a crushing device for primary crushing, the particle size of the primary crushed raw materials is larger, the primary crushing is carried out again, the crushing is carried out for screening, and the screened raw materials enter a ball milling device, so that the raw material crushing effect is better, and the use is convenient; accurately weighing the bauxite with the particle size being less than or equal to 1mm, the bauxite with the particle size being 1-3mm and the raw material accurately weighed according to the formula amount after ball milling in the step A, feeding the raw materials into a homogenizing device for homogenizing, homogenizing the raw materials of the bauxite and the silica according to the mass ratio with water, feeding the homogenized raw materials into a filter pressing device for filter pressing, feeding the filter pressed raw materials into a vacuum mud extruding device for mud extruding, drying the extruded mud, drying the dried raw materials until the water content is less than 10 percent, feeding the dried raw materials into a rotary kiln for high-temperature calcination, cooling the prepared product in the rotary kiln, moving the product in the rotary kiln out of a cooling device for cooling, gradually cooling the product in the cooling device, controlling the cooling speed, and D, crushing the product cooled in the step D, screening after crushing, screening products smaller than or equal to 1.5mm, and performing qualification inspection on the product cooled in the step E.
Example 7:
on the basis of examples 1 to 6, the preparation method is as follows:
crushing raw materials A: respectively lifting bauxite and silica raw materials into a crushing device for primary crushing, carrying out fine crushing again after the primary crushing, carrying out screening after the crushing, and then feeding into a ball milling device after the screening;
homogenizing and extruding the raw materials B: b, feeding the raw materials of the bauxite with the particle size of less than or equal to 1mm and the bauxite with the particle size of 1-3mm which are subjected to ball milling in the step A into a homogenizing device according to the formula amount, adding water for homogenizing, wherein the mass ratio of the raw materials of the bauxite and the silica to the water is as follows: 1: 2.5, homogenizing, then, entering a filter pressing device for filter pressing, after filter pressing, entering a vacuum mud extruding device for mud extruding, drying after mud extruding, wherein the drying temperature is 80 ℃, and the drying time is as follows: 1 h;
c, high-temperature calcination: b, putting the dried raw materials into a rotary kiln for high-temperature calcination at 1400 ℃;
d, cooling a product: c, cooling the product prepared in the step C in a rotary kiln for 2h, then moving the product in the rotary kiln out of a cooling device for cooling, and gradually cooling in the cooling device to 100 ℃/h;
e, crushing a product: c, crushing the product cooled in the step D, screening after crushing, and screening products with the size less than or equal to 1.5 mm;
f, product inspection: e, performing qualification inspection on the product cooled in the step E;
bauxite and silica raw materials are respectively lifted and enter a crushing device for primary crushing, the particle size of the primary crushed raw materials is larger, the primary crushing is carried out again, the crushing is carried out for screening, and the screened raw materials enter a ball milling device, so that the raw material crushing effect is better, and the use is convenient; accurately weighing the bauxite with the particle size being less than or equal to 1mm, the bauxite with the particle size being 1-3mm and the raw material accurately weighed according to the formula amount after ball milling in the step A, feeding the raw materials into a homogenizing device for homogenizing, homogenizing the raw materials of the bauxite and the silica according to the mass ratio with water, feeding the homogenized raw materials into a filter pressing device for filter pressing, feeding the filter pressed raw materials into a vacuum mud extruding device for mud extruding, drying the extruded mud, drying the dried raw materials until the water content is less than 10 percent, feeding the dried raw materials into a rotary kiln for high-temperature calcination, cooling the prepared product in the rotary kiln, moving the product in the rotary kiln out of a cooling device for cooling, gradually cooling the product in the cooling device, controlling the cooling speed, and D, crushing the product cooled in the step D, screening after crushing, screening products smaller than or equal to 1.5mm, and performing qualification inspection on the product cooled in the step E.
Example 8:
on the basis of examples 1 to 7, the preparation method is as follows:
crushing raw materials A: respectively lifting bauxite and silica raw materials into a crushing device for primary crushing, carrying out fine crushing again after the primary crushing, carrying out screening after the crushing, and then feeding into a ball milling device after the screening;
homogenizing and extruding the raw materials B: b, feeding the raw materials of the bauxite with the particle size of less than or equal to 1mm and the bauxite with the particle size of 1-3mm which are subjected to ball milling in the step A into a homogenizing device according to the formula amount, adding water for homogenizing, wherein the mass ratio of the raw materials of the bauxite and the silica to the water is as follows: 1: 3, homogenizing, then carrying out filter pressing in a filter pressing device, after filter pressing, then carrying out mud extrusion in a vacuum mud extrusion device, drying after mud extrusion, wherein the drying temperature is 90 ℃, and the drying time is as follows: 2 h;
c, high-temperature calcination: b, putting the dried raw materials into a rotary kiln for high-temperature calcination at 1600 ℃;
d, cooling a product: c, cooling the product prepared in the step C in a rotary kiln for 3h, then moving the product in the rotary kiln out of a cooling device for cooling, and gradually cooling in the cooling device to 200 ℃/h;
e, crushing a product: c, crushing the product cooled in the step D, screening after crushing, and screening products with the size less than or equal to 1.5 mm;
f, product inspection: e, performing qualification inspection on the product cooled in the step E;
bauxite and silica raw materials are respectively lifted and enter a crushing device for primary crushing, the particle size of the primary crushed raw materials is larger, the primary crushing is carried out again, the crushing is carried out for screening, and the screened raw materials enter a ball milling device, so that the raw material crushing effect is better, and the use is convenient; accurately weighing the bauxite with the particle size being less than or equal to 1mm, the bauxite with the particle size being 1-3mm and the raw material accurately weighed according to the formula amount after ball milling in the step A, feeding the raw materials into a homogenizing device for homogenizing, homogenizing the raw materials of the bauxite and the silica according to the mass ratio with water, feeding the homogenized raw materials into a filter pressing device for filter pressing, feeding the filter pressed raw materials into a vacuum mud extruding device for mud extruding, drying the extruded mud, drying the dried raw materials until the water content is less than 10 percent, feeding the dried raw materials into a rotary kiln for high-temperature calcination, cooling the prepared product in the rotary kiln, moving the product in the rotary kiln out of a cooling device for cooling, gradually cooling the product in the cooling device, controlling the cooling speed, and D, crushing the product cooled in the step D, screening after crushing, screening products smaller than or equal to 1.5mm, and performing qualification inspection on the product cooled in the step E.
Example 9:
on the basis of the examples 1 to 8, in the step C, the high-temperature calcination time at 1400 ℃ is 8 hours; the high-temperature calcination time at 1650 ℃ is 6 h; sintering is carried out at different temperatures and time in two stages, so that the prepared product has the characteristics of good thermal shock stability, small high-temperature creep value, good chemical corrosion resistance and stable quality.
Example 10:
on the basis of examples 1 to 9, in the step C, the high-temperature calcination time at 1650 ℃ is 4 hours; the high-temperature calcination time at 1650 ℃ is 4 h; sintering is carried out at different temperatures and time in two stages, so that the prepared product has the characteristics of good thermal shock stability, small high-temperature creep value, good chemical corrosion resistance and stable quality.
Example 11:
on the basis of examples 1 to 10, in step C, the high-temperature calcination at 14500 ℃ is carried out for 6 hours; the high-temperature calcination time at 1700 ℃ is 5 h; sintering is carried out at different temperatures and time in two stages, so that the prepared product has the characteristics of good thermal shock stability, small high-temperature creep value, good chemical corrosion resistance and stable quality.
Example 12:
on the basis of the embodiments 1 to 11, the iron removal is carried out on the ball-milled raw materials in the step A and the screened products in the step E;
step A, B, C, D, cloth bag dust removal is adopted, and desulfurization is also carried out when dust removal is carried out in calcination; the performance of the prepared product can meet the requirement due to iron removal, and the dust removal and desulfurization are realized, so that the influence on the environment and workers is reduced.
Example 13:
on the basis of examples 1 to 12, the homogenization apparatus comprises a homogenization tank 1;
a liquid inlet pipe 2 is connected in a homogenizing box 1, the homogenizing box 1 is connected with a feeding channel 3, the top of the feeding channel 3 is connected with a storage hopper 5, the bottom of the feeding channel 3 is provided with a first filter screen plate 4, the side wall of the feeding channel 3 is provided with a slide rail 6, a driving shaft 7 is arranged in the slide rail 6, the driving shaft 7 is connected with a first motor 8, the driving shaft 7 is connected with a driving rod 9, and the driving rod 9 is connected with a crushing blade 10 and a first scraper 11;
a second filter screen plate 12 is arranged at the lower part of the side wall of the homogenizing box 1, a collecting box 13 is arranged on the homogenizing box 1 at the position of the second filter screen plate 12, the collecting box 13 is connected with an output pipe 14, and a control valve 15 is arranged on the output pipe 14; bauxite and silica with the particle size meeting the requirements after crushing enter the homogenizing box 1 through the feeding channel 3 by the storage hopper 5, the driving rod 9 connected with the driving shaft 7 is driven to move, the crushing blade 10 and the first scraper blade 11 connected with the driving rod 9 work, the materials can conveniently enter the homogenizing box 1 through the first filter screen plate 4, the materials are stirred, mixed and homogenized in the homogenizing box 1, the materials which are uniformly mixed enter the collecting box 13 through the second filter screen plate 12, and then the materials are output through the output pipe 14 connected with the collecting box 13.
Example 14:
on the basis of the embodiments 1 to 13, a rotating shaft 16 is arranged in the homogenizing box 1, the rotating shaft 16 is connected with a second motor 17, a stirring paddle 18 is arranged on the rotating shaft 16, and a second scraper 19 is arranged on the stirring paddle 18;
one side of the homogenizing box 1 is connected with an intermediate pipe 20, the intermediate pipe 20 is connected to the feeding channel 3, and a power pump 21 is arranged on the intermediate pipe 20; the stirring paddle 18 connected with the rotating shaft 16 moves, bauxite, silica and water are well mixed, the adherence is reduced due to the arrangement of the second scraping plate 19, and the mixture in the homogenizing box 1 enters the feeding channel 3 through the middle pipe 20, so that the mixing effect is good.
Example 15:
on the basis of the embodiments 1 to 14, in the step C, the rotary kiln comprises a rotary kiln body 22, the rotary kiln body 22 is obliquely arranged, the lower end of the rotary kiln body 22 is connected with a rotary kiln head cover 23, the rotary kiln head cover 23 is connected with a fuel device 24, the lower part of the rotary kiln head cover 23 is connected with a finished material discharging channel 34, and the higher end of the rotary kiln body 22 is connected with a raw material bin 25;
the raw material bin 25 is connected with an intermediate channel 33, the intermediate channel 33 is connected with the feed hopper 26, the feed hopper 26 is communicated with the raw material bin 25 through the intermediate channel 33, and a blanking plate 27 is sequentially arranged in the raw material bin 25 from top to bottom; the calcining raw material entering the rotary kiln body 22 enters the intermediate channel 33 through the feed hopper 26 and then enters the blanking plate 27 of the raw material bin 25, the blanking plate 27 is obliquely arranged, so that the calcining raw material can enter the rotary kiln body 22 for calcining, and then is output through the rotary kiln head cover 23 and the discharge channel 34; the fuel in the fuel device 24 is burned, and hot air is introduced into the rotary kiln body 22 through the fan, so that the calcination is facilitated.
Example 16:
on the basis of the embodiments 1 to 15, the power mechanism comprises a gear ring 28 arranged in the middle of the rotary kiln body 22, a driving gear 29 is meshed at the bottom of the gear ring 28, and a driving motor 30 is connected to the driving gear 29;
the outer wall of the rotary kiln body 22 is provided with auxiliary rails 31, and the auxiliary rails 31 are arranged at two ends of the rotary kiln body 22; an auxiliary wheel 32 is arranged in the auxiliary track 31 in a matching way, and the auxiliary wheel 32 rotates in the auxiliary track 31; the power mechanism drives the rotary kiln body 22 to move.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (10)
1. A sintered mullite production process is characterized by comprising the following steps: the method comprises the following raw materials: bauxite, silica.
2. The sintered mullite production process of claim 1 wherein: the bauxite grain size is selected to be 1mm or less and 1 to 3mm or less, and the silica grain size is selected to be 2.5 to 6 mm.
3. The sintered mullite production process of claim 1 wherein: the raw materials comprise the following components in parts by mass: 70-80 parts of bauxite with the particle size of less than or equal to 1mm, 15-20 parts of bauxite with the particle size of 1-3mm and 8-12 parts of silica.
4. A sintered mullite production process as claimed in any one of claims 1-3 wherein: the preparation method comprises the following steps:
crushing raw materials A: respectively lifting bauxite and silica raw materials into a crushing device for primary crushing, carrying out fine crushing again after the primary crushing, carrying out screening after the crushing, and then feeding into a ball milling device after the screening;
homogenizing and extruding the raw materials B: b, feeding the raw materials of the bauxite with the particle size of less than or equal to 1mm and the bauxite with the particle size of 1-3mm which are subjected to ball milling in the step A into a homogenizing device according to the formula amount, adding water for homogenizing, wherein the mass ratio of the raw materials of the bauxite and the silica to the water is as follows: 1: 2.5-4, homogenizing, then feeding into a filter pressing device for filter pressing, then feeding into a vacuum mud extruding device for mud extruding after filter pressing, drying after mud extruding, wherein the drying temperature is 80-100 ℃, and the drying time is as follows: 1-3 h;
c, high-temperature calcination: b, the dried raw materials enter a rotary kiln for high-temperature calcination at the temperature of 1400 ℃ and 1800 ℃;
d, cooling a product: c, cooling the product prepared in the step C in a rotary kiln for 2-4h, then removing the product in the rotary kiln out of a cooling device for cooling, and gradually cooling in the cooling device, wherein the temperature in the cooling device is 100-260 ℃/h;
e, crushing a product: c, crushing the product cooled in the step D, screening after crushing, and screening products with the size less than or equal to 1.5 mm;
f, product inspection: and E, performing qualification inspection on the product cooled in the step E.
5. The sintered mullite production process of claim 4 wherein: in the step C, the high-temperature calcination time at 1400-1650 ℃ is 4-8 h; 1650 and 1800 ℃ for 4-6 h.
6. The sintered mullite production process of claim 4 wherein: removing iron from the ball-milled raw materials in the step A and the screened products in the step E;
in step A, B, C, D, cloth bag dust removal is adopted, and desulfurization treatment is also carried out during dust removal in calcination.
7. An electrofused mullite production process according to claim 4, wherein: the homogenizing device comprises a homogenizing box (1);
a liquid inlet pipe (2) is connected in a homogenizing box (1), the homogenizing box (1) is connected with a feeding channel (3), the top of the feeding channel (3) is connected with a storage hopper (5), the bottom of the feeding channel (3) is provided with a first filter screen plate (4), the side wall of the feeding channel (3) is provided with a slide rail (6), a driving shaft (7) is arranged in the slide rail (6), the driving shaft (7) is connected with a first motor (8), the driving shaft (7) is connected with a driving rod (9), and the driving rod (9) is connected with a crushing blade (10) and a first scraper (11);
the lower part of the side wall of the homogenizing box (1) is provided with a second filter screen plate (12), the homogenizing box (1) at the position of the second filter screen plate (12) is provided with a collecting box (13), the collecting box (13) is connected with an output pipe (14), and the output pipe (14) is provided with a control valve (15).
8. The sintered mullite production process of claim 7 wherein: a rotating shaft (16) is arranged in the homogenizing box (1), the rotating shaft (16) is connected with a second motor (17), a stirring paddle (18) is arranged on the rotating shaft (16), and a second scraper (19) is arranged on the stirring paddle (18);
one side of the homogenizing box (1) is connected with a middle pipe (20), the middle pipe (20) is connected to the feeding channel (3), and a power pump (21) is arranged on the middle pipe (20).
9. The sintered mullite production process of claim 7 wherein: in the step C, the rotary kiln comprises a rotary kiln body (22), the rotary kiln body (22) is obliquely arranged, the lower end of the rotary kiln body (22) is connected with a rotary kiln hood (23), the rotary kiln hood (23) is connected with a fuel device (24), the lower part of the rotary kiln hood (23) is connected with a finished material discharging channel (34), and the higher end of the rotary kiln body (22) is connected with a raw material bin (25);
middle passageway (33) is connected in former feed bin (25), and feeder hopper (26) are connected in middle passageway (33), and feeder hopper (26) set up through middle passageway (33) and former feed bin (25) intercommunication, have down flitch (27) by last flitch (27) down of having set gradually in former feed bin (25).
10. The sintered mullite production process of claim 9 wherein: the power mechanism comprises a gear ring (28) arranged in the middle of the rotary kiln body (22), a driving gear (29) is arranged at the bottom of the gear ring (28) in a meshed mode, and a driving motor (30) is connected to the driving gear (29);
the rotary kiln comprises a rotary kiln body (22), auxiliary rails (31) are arranged on the outer wall of the rotary kiln body (22), the auxiliary rails (31) are arranged at two ends of the rotary kiln body (22), auxiliary wheels (32) are arranged in the auxiliary rails (31) in a matched mode, and the auxiliary wheels (32) rotate inside the auxiliary rails (31).
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