CN113149623A - Environment-friendly high-strength anhydrous stemming and preparation method thereof - Google Patents
Environment-friendly high-strength anhydrous stemming and preparation method thereof Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title abstract description 18
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 55
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 41
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 239000010426 asphalt Substances 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000010443 kyanite Substances 0.000 claims abstract description 16
- 229910052850 kyanite Inorganic materials 0.000 claims abstract description 16
- 239000010445 mica Substances 0.000 claims abstract description 16
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 16
- 229910052903 pyrophyllite Inorganic materials 0.000 claims abstract description 16
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 14
- 150000004767 nitrides Chemical class 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 27
- 239000007767 bonding agent Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000012257 stirred material Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 1
- 229910052593 corundum Inorganic materials 0.000 claims 1
- 229910001845 yogo sapphire Inorganic materials 0.000 claims 1
- 238000003912 environmental pollution Methods 0.000 abstract description 7
- 239000004615 ingredient Substances 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000005245 sintering Methods 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
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Abstract
The invention relates to an environment-friendly high-strength anhydrous stemming and a preparation method thereof, wherein the environment-friendly high-strength anhydrous stemming is prepared from the following raw materials in parts by weight: 7-10 parts of bauxite with the specification of 0-1mm, 6-9 parts of bauxite with the specification of 1-3mm, 6-9 parts of pyrophyllite with the specification of 1-3mm, 4-6 parts of silicon carbide with the specification of 0-1mm, 7-10 parts of coke powder with the specification of 0-3mm, 12-15 parts of bauxite with the specification of 180 meshes, 6-10 parts of silicon carbide with the specification of 200 meshes, 8-11 parts of Guangxi white mud with the specification of 200 meshes, 3-6 parts of kyanite with the specification of 80 meshes, 4-7 parts of ferrosilicon nitride with the specification of 200 meshes, 1-2 parts of mica with the specification of 200 meshes, 4-6 parts of medium temperature asphalt with the specification of 80 meshes and 12-14 parts of tar by adopting a method of sequentially adding ingredients in multiple layers, firstly combining raw materials with larger particle size to form a stable combined frame, and then sequentially adding raw materials with smaller particle size, filling the part with weaker bonding strength, so that the bonding property and the use strength of the anhydrous stemming are higher; the invention has the advantages of reasonable preparation process, high stemming strength and little environmental pollution.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to environment-friendly high-strength anhydrous stemming and a preparation method thereof.
Background
The anhydrous stemming is a refractory material for blocking an iron notch in the blast furnace iron-making process, the performance of the anhydrous stemming is good and bad, the safety and smooth operation of a blast furnace are directly influenced, along with the development of the blast furnace smelting technology, the blast furnace iron-making has the characteristics of large furnace volume, high wind temperature, high top pressure, increased smelting strength and the like, the quality requirement on the stemming is higher and higher, and a new requirement is also put forward on the production of the stemming. In the prior art, a large amount of coke is introduced for improving the air permeability of the stemming, and silicon carbide is introduced for improving the erosion and abrasion resistance of the stemming, which all cause the sintering performance of the stemming to be poor, the medium-temperature strength is generated mainly by combining the sintering of clay and the like, and the early strength is low; if a large amount of clay is introduced, the sintering shrinkage is large, iron notch breakage is generated, and high-temperature strength is reduced, so that the sintering property, high-medium-low-temperature strength and adhesiveness of the existing anhydrous stemming become important concerns, and the tar component content used in the existing preparation raw materials is too high, so that the high-temperature asphalt in the bonding agent has great pollution to the environment; therefore, it is necessary to provide an environment-friendly high-strength anhydrous stemming with reasonable preparation process, high stemming strength and little environmental pollution and a preparation method thereof.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the environment-friendly high-strength anhydrous stemming with reasonable preparation process, high stemming strength and small environmental pollution and the preparation method thereof.
The purpose of the invention is realized as follows: the environment-friendly high-strength anhydrous stemming comprises the following raw materials in parts by weight: 7-10 parts of bauxite of 0-1mm specification, 6-9 parts of bauxite of 1-3mm specification, 6-9 parts of pyrophyllite of 1-3mm specification, 4-6 parts of silicon carbide of 0-1mm specification, 7-10 parts of coke powder of 0-3mm specification, 12-15 parts of bauxite of 180 meshes specification, 6-10 parts of silicon carbide of 200 meshes specification, 8-11 parts of Guangxi white mud of 200 meshes specification, 3-6 parts of kyanite of 80 meshes specification, 4-7 parts of ferrosilicon nitride of 200 meshes specification, 1-2 parts of mica of 200 meshes specification, 4-6 parts of medium temperature asphalt of 80 meshes specification and 12-14 parts of tar.
The environment-friendly high-strength anhydrous stemming is prepared from the following raw materials in parts by weight: 8.67 parts of bauxite of 0-1mm specification, 7.96 parts of bauxite of 1-3mm specification, 7.71 parts of pyrophyllite of 1-3mm specification, 5.14 parts of silicon carbide of 0-1mm specification, 8.67 parts of coke powder of 0-3mm specification, 13.88 parts of bauxite of 180 meshes specification, 8.67 parts of silicon carbide of 200 meshes specification, 9.57 parts of Guangxi white mud of 200 meshes specification, 4.37 parts of kyanite of 80 meshes specification, 5.2 parts of ferrosilicon nitride of 200 meshes specification, 1.73 parts of mica of 200 meshes specification, 5.2 parts of medium-temperature asphalt of 80 meshes specification and 13.23 parts of tar.
The environment-friendly high-strength anhydrous stemming is prepared from the following raw materials in parts by weight: 7 parts of bauxite of 0-1mm specification, 6 parts of bauxite of 1-3mm specification, 6 parts of pyrophyllite of 1-3mm specification, 4 parts of silicon carbide of 0-1mm specification, 7 parts of coke powder of 0-3mm specification, 125 parts of bauxite of 180 meshes specification, 6 parts of silicon carbide of 200 meshes specification, 8 parts of Guangxi white mud of 200 meshes specification, 3 parts of kyanite of 80 meshes specification, 4 parts of ferrosilicon nitride of 200 meshes specification, 1 part of mica of 200 meshes specification, 4 parts of medium temperature asphalt of 80 meshes specification and 12 parts of tar.
The environment-friendly high-strength anhydrous stemming is prepared from the following raw materials in parts by weight: 10 parts of bauxite of 0-1mm specification, 9 parts of bauxite of 1-3mm specification, 9 parts of pyrophyllite of 1-3mm specification, 6 parts of silicon carbide of 0-1mm specification, 10 parts of coke powder of 0-3mm specification, 15 parts of bauxite of 180 meshes specification, 10 parts of silicon carbide of 200 meshes specification, 11 parts of Guangxi white mud of 200 meshes specification, 6 parts of kyanite of 80 meshes specification, 7 parts of ferrosilicon nitride of 200 meshes specification, 2 parts of mica of 200 meshes specification, 6 parts of medium temperature asphalt of 80 meshes specification and 14 parts of tar.
0-1mm bauxite, 1-3mm bauxite, and Al in 180 mesh bauxite2O3The content of (A) is 85%, the content of SiC in silicon carbide with the specification of 0-1mm and silicon carbide with the specification of 200 meshes is 90%, and the content of C in the coke powder is 86%.
A preparation method of environment-friendly high-strength anhydrous stemming is characterized by comprising the following steps: it comprises the following steps:
step 1): weighing the raw materials, namely weighing the raw materials of the components according to the weight ratio;
step 2): preparing a bonding agent, adding the tar into a heating oil tank for heating and stirring, wherein the heating temperature is 80-120 ℃, the stirring speed is 100-150r/min, the heating and stirring time is 2h, and preserving heat;
step 3): mixing, adding bauxite of 1-3mm specification, pyrophyllite of 1-3mm specification, silicon carbide of 0-1mm specification, coke powder of 0-3mm specification, Guangxi white mud of 200 meshes specification, kyanite of 80 meshes specification, ferrosilicon nitride of 200 meshes specification, mica of 200 meshes specification and medium temperature asphalt of 80 meshes specification into a mixer for heating and stirring, wherein the heating temperature is 80-120 ℃, the stirring speed is 200-one-step 250r/min, and the duration is 0.5-1 h;
step 4): adding a bonding agent, adding the bonding agent obtained in the step 2) into the mixed liquid obtained in the step 3), heating and stirring simultaneously, wherein the heating temperature is 140-180 ℃, the stirring speed is 230-;
step 5): continuously and sequentially adding bauxite of 0-1mm specification, bauxite of 180 meshes specification and silicon carbide of 200 meshes specification into the stirred material obtained in the step 4), heating at 140-180 ℃, stirring at the speed of 230-280r/min, continuously heating and stirring for 1h, then carrying out mixed grinding for 25-35min, then discharging to a mud extruder, and carrying out extrusion forming to obtain the anhydrous stemming.
The invention has the beneficial effects that:
1. the invention adopts bauxite and silicon carbide with various specifications, and can enable the anhydrous stemming to be more adhesive and have higher strength in the process of forming the anhydrous stemming;
2. the Guangxi white mud is used as clay, so that the environmental protection performance is better, and the nucleation performance is more stable;
3. the preparation method adopts a method of adding ingredients in sequence at multiple levels, firstly, raw materials with larger grain sizes are combined to form a stable combined frame, and then raw materials with smaller grain sizes are added in sequence to fill the part with weaker bonding strength, so that the bonding property and the use strength of the anhydrous stemming are higher;
4. compared with the prior art, the tar content and the asphalt content are greatly reduced from the original 20-30% to 5-13%, so that the environmental pollution is greatly reduced; the invention has the advantages of reasonable preparation process, high stemming strength and little environmental pollution.
Detailed Description
Example 1
The environment-friendly high-strength anhydrous stemming is prepared from the following raw materials in parts by weight: 8.67 parts of bauxite of 0-1mm specification, 7.96 parts of bauxite of 1-3mm specification, 7.71 parts of pyrophyllite of 1-3mm specification, 5.14 parts of silicon carbide of 0-1mm specification, 8.67 parts of coke powder of 0-3mm specification, 13.88 parts of bauxite of 180 meshes specification, 8.67 parts of silicon carbide of 200 meshes specification, 9.57 parts of Guangxi white mud of 200 meshes specification, 4.37 parts of kyanite of 80 meshes specification, 5.2 parts of ferrosilicon nitride of 200 meshes specification, 1.73 parts of mica of 200 meshes specification, 5.2 parts of medium-temperature asphalt of 80 meshes specification and 13.23 parts of tar.
On the basis, 135Kg of bauxite with the specification of 0-1mm, 124Kg of bauxite with the specification of 1-3mm, 120Kg of pyrophyllite with the specification of 1-3mm, 80Kg of silicon carbide with the specification of 0-1mm, 135Kg of coke powder with the specification of 0-3mm, 216Kg of bauxite with the specification of 180 meshes, 135Kg of silicon carbide with the specification of 200 meshes, 149Kg of Guangxi white mud with the specification of 200 meshes, 68Kg of kyanite with the specification of 80 meshes, 81Kg of silicon nitride with the specification of 200 meshes, 27Kg of mica with the specification of 200 meshes, 81Kg of medium temperature asphalt with the specification of 80 meshes and 205Kg of tar are selected.
Adding 205Kg of tar into a heating oil tank for heating and stirring, wherein the heating temperature is 80-120 ℃, the stirring speed is 100-150r/min, the heating and stirring time is 2h, and the heat preservation is carried out; adding 124Kg of bauxite with the specification of 1-3mm, 120Kg of pyrophyllite with the specification of 1-3mm, 80Kg of silicon carbide with the specification of 0-1mm, 135Kg of coke breeze with the specification of 0-3mm, 149Kg of Guangxi white mud with the specification of 200 meshes, 68Kg of kyanite with the specification of 80 meshes, 81Kg of silicon nitride with the specification of 200 meshes, 27Kg of mica with the specification of 200 meshes and 81Kg of medium-temperature asphalt with the specification of 80 meshes into a mixer for heating and stirring at the temperature of 80-120 ℃ at the stirring speed of 200-mesh 250r/min for 0.5-1 h; adding the heated and stirred tar into the ingredients, and simultaneously heating and stirring at the heating temperature of 140-180 ℃ and the stirring speed of 230-; during the stirring process, 135Kg of bauxite with the specification of 0-1mm, 216Kg of bauxite with the specification of 180 meshes and 135Kg of silicon carbide with the specification of 200 meshes are sequentially added, the heating temperature is 140-180 ℃, the stirring speed is 230-280r/min, the mixture is continuously heated and stirred for 1h, the mixture is mixed and ground for 25-35min, then the mixture is discharged to a mud extruder, the anhydrous stemming is obtained by extrusion molding, the performance of the prepared anhydrous stemming is shown in Table 1,
table 1 performance table for anhydrous stemming prepared in example 1
Example 2
The environment-friendly high-strength anhydrous stemming is prepared from the following raw materials in parts by weight: 7 parts of bauxite of 0-1mm specification, 6 parts of bauxite of 1-3mm specification, 6 parts of pyrophyllite of 1-3mm specification, 4 parts of silicon carbide of 0-1mm specification, 7 parts of coke powder of 0-3mm specification, 125 parts of bauxite of 180 meshes specification, 6 parts of silicon carbide of 200 meshes specification, 8 parts of Guangxi white mud of 200 meshes specification, 3 parts of kyanite of 80 meshes specification, 4 parts of ferrosilicon nitride of 200 meshes specification, 1 part of mica of 200 meshes specification, 4 parts of medium temperature asphalt of 80 meshes specification and 12 parts of tar.
Compared with the example 1, the components all take the lowest value in the range, the preparation method is the same as the example 1, the performance table of the prepared anhydrous stemming is shown in the table 2,
table 2 performance table of anhydrous stemming prepared in example 2
Example 3
The environment-friendly high-strength anhydrous stemming is prepared from the following raw materials in parts by weight: 10 parts of bauxite of 0-1mm specification, 9 parts of bauxite of 1-3mm specification, 9 parts of pyrophyllite of 1-3mm specification, 6 parts of silicon carbide of 0-1mm specification, 10 parts of coke powder of 0-3mm specification, 15 parts of bauxite of 180 meshes specification, 10 parts of silicon carbide of 200 meshes specification, 11 parts of Guangxi white mud of 200 meshes specification, 6 parts of kyanite of 80 meshes specification, 7 parts of ferrosilicon nitride of 200 meshes specification, 2 parts of mica of 200 meshes specification, 6 parts of medium temperature asphalt of 80 meshes specification and 14 parts of tar;
the ingredients were set to the highest values within the ranges as compared with example 1, the preparation method was the same as example 1, and the properties of the obtained anhydrous stemming are shown in Table 3
Table 3 performance table for anhydrous stemming prepared in example 3
To further illustrate the performance of the present invention, specific effect data is provided below.
Regarding the individual performance index test standard of the invention, the national people's republic of China's industry standard of Anhydrous stemming for blast furnace (YB/T4196-.
Sample preparation: tamping the soft and uniform stemming at 50 ℃ by using an iron hammer in a 160mm multiplied by 40mm mould to prepare a sample, wherein the sample is required to be not layered, have a flat surface and compact corners, and then directly demoulding or drying and demoulding.
The bulk density was examined as YB/T5200.
The room temperature compressive strength was examined in accordance with GB/T5072.
TABLE 4 physicochemical indexes of anhydrous stemming
By combining the embodiments 1-3, the volume density and the normal-temperature compressive strength of the anhydrous stemming accord with the national industry standard, and bauxite and silicon carbide with various specifications are adopted, so that the anhydrous stemming can be more bonded and has higher strength in the forming process of the anhydrous stemming; the preparation method adopts a method of adding ingredients in sequence at multiple levels, firstly, raw materials with larger grain sizes are combined to form a stable combined frame, and then raw materials with smaller grain sizes are added in sequence to fill the part with weaker bonding strength, so that the bonding property and the use strength of the anhydrous stemming are higher; compared with the prior art, the tar content and the asphalt content are greatly reduced from the original 20-30% to 5-13%, so that the environmental pollution is greatly reduced; the invention has the advantages of reasonable preparation process, high stemming strength and little environmental pollution.
Claims (6)
1. The utility model provides an anhydrous stemming of environment-friendly high strength which characterized in that: the composition is prepared from the following raw materials in parts by weight: 7-10 parts of bauxite of 0-1mm specification, 6-9 parts of bauxite of 1-3mm specification, 6-9 parts of pyrophyllite of 1-3mm specification, 4-6 parts of silicon carbide of 0-1mm specification, 7-10 parts of coke powder of 0-3mm specification, 12-15 parts of bauxite of 180 meshes specification, 6-10 parts of silicon carbide of 200 meshes specification, 8-11 parts of Guangxi white mud of 200 meshes specification, 3-6 parts of kyanite of 80 meshes specification, 4-7 parts of ferrosilicon nitride of 200 meshes specification, 1-2 parts of mica of 200 meshes specification, 4-6 parts of medium temperature asphalt of 80 meshes specification and 12-14 parts of tar.
2. The environment-friendly high-strength anhydrous stemming according to claim 1, wherein: the composition is prepared from the following raw materials in parts by weight: 8.67 parts of bauxite of 0-1mm specification, 7.96 parts of bauxite of 1-3mm specification, 7.71 parts of pyrophyllite of 1-3mm specification, 5.14 parts of silicon carbide of 0-1mm specification, 8.67 parts of coke powder of 0-3mm specification, 13.88 parts of bauxite of 180 meshes specification, 8.67 parts of silicon carbide of 200 meshes specification, 9.57 parts of Guangxi white mud of 200 meshes specification, 4.37 parts of kyanite of 80 meshes specification, 5.2 parts of ferrosilicon nitride of 200 meshes specification, 1.73 parts of mica of 200 meshes specification, 5.2 parts of medium-temperature asphalt of 80 meshes specification and 13.23 parts of tar.
3. The environment-friendly high-strength anhydrous stemming according to claim 1, wherein: the composition is prepared from the following raw materials in parts by weight: 7 parts of bauxite of 0-1mm specification, 6 parts of bauxite of 1-3mm specification, 6 parts of pyrophyllite of 1-3mm specification, 4 parts of silicon carbide of 0-1mm specification, 7 parts of coke powder of 0-3mm specification, 125 parts of bauxite of 180 meshes specification, 6 parts of silicon carbide of 200 meshes specification, 8 parts of Guangxi white mud of 200 meshes specification, 3 parts of kyanite of 80 meshes specification, 4 parts of ferrosilicon nitride of 200 meshes specification, 1 part of mica of 200 meshes specification, 4 parts of medium temperature asphalt of 80 meshes specification and 12 parts of tar.
4. The environment-friendly high-strength anhydrous stemming according to claim 1, wherein: the composition is prepared from the following raw materials in parts by weight: 10 parts of bauxite of 0-1mm specification, 9 parts of bauxite of 1-3mm specification, 9 parts of pyrophyllite of 1-3mm specification, 6 parts of silicon carbide of 0-1mm specification, 10 parts of coke powder of 0-3mm specification, 15 parts of bauxite of 180 meshes specification, 10 parts of silicon carbide of 200 meshes specification, 11 parts of Guangxi white mud of 200 meshes specification, 6 parts of kyanite of 80 meshes specification, 7 parts of ferrosilicon nitride of 200 meshes specification, 2 parts of mica of 200 meshes specification, 6 parts of medium temperature asphalt of 80 meshes specification and 14 parts of tar.
5. The environment-friendly high-strength anhydrous stemming according to any one of claims 1 to 4, wherein: the bauxite of 0-1mm specification, the bauxite of 1-3mm specification and the bauxite of 180 meshes are added with Al2O3The content of (A) is 85%, the content of SiC in silicon carbide with the specification of 0-1mm and silicon carbide with the specification of 200 meshes is 90%, and the content of C in the coke powder is 86%.
6. The method for preparing the environment-friendly high-strength anhydrous stemming as claimed in claims 1 to 4, wherein: it comprises the following steps:
step 1): weighing the raw materials, namely weighing the raw materials of the components according to the weight ratio;
step 2): preparing a bonding agent, adding the tar into a heating oil tank for heating and stirring, wherein the heating temperature is 80-120 ℃, the stirring speed is 100-150r/min, the heating and stirring time is 2h, and preserving heat;
step 3): mixing, adding bauxite of 1-3mm specification, pyrophyllite of 1-3mm specification, silicon carbide of 0-1mm specification, coke powder of 0-3mm specification, Guangxi white mud of 200 meshes specification, kyanite of 80 meshes specification, ferrosilicon nitride of 200 meshes specification, mica of 200 meshes specification and medium temperature asphalt of 80 meshes specification into a mixer for heating and stirring, wherein the heating temperature is 80-120 ℃, the stirring speed is 200-one-step 250r/min, and the duration is 0.5-1 h;
step 4): adding a bonding agent, adding the bonding agent obtained in the step 2) into the mixed liquid obtained in the step 3), heating and stirring simultaneously, wherein the heating temperature is 140-180 ℃, the stirring speed is 230-;
step 5): continuously and sequentially adding bauxite of 0-1mm specification, bauxite of 180 meshes specification and silicon carbide of 200 meshes specification into the stirred material obtained in the step 4), heating at 140-180 ℃, stirring at the speed of 230-280r/min, continuously heating and stirring for 1h, then carrying out mixed grinding for 25-35min, then discharging to a mud extruder, and carrying out extrusion forming to obtain the anhydrous stemming.
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| CN115321965A (en) * | 2022-08-31 | 2022-11-11 | 湖南湘钢瑞泰科技有限公司 | Anhydrous stemming and preparation method thereof |
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