CN111056820A - SCS sub-nano silicon spar prepared by utilizing industrial full solid waste and preparation method thereof - Google Patents
SCS sub-nano silicon spar prepared by utilizing industrial full solid waste and preparation method thereof Download PDFInfo
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Abstract
In order to solve the problems of higher cost and low industrial solid waste treatment capacity of the conventional SCS sub-nano silicon spar technology, the invention provides SCS sub-nano silicon spar prepared by utilizing industrial full solid waste and a preparation method thereof. The silicon crystal stone comprises the following raw materials in percentage by mass: 30-50% of quartz sand tailings, 30-50% of ceramic polishing slag, 5-10% of coal gangue, 3-8% of steel slag and 5-10% of potassium permanganate tailings. The preparation method comprises 5 steps of formula raw material mixing, slurry preparation, spray granulation, material distribution and firing. The SCS sub-nano silicon-spar plate prepared by the invention has the volume weight of 360-480 kg/m3The compression strength is more than or equal to 5MPa, and the water absorption of the product is less than or equal to 2 percent. The invention realizes that all the raw materials of the formula adopt industrial solid waste raw materials, and improves the recycling of solid wasteThe method has good economic value and environmental protection value.
Description
Technical Field
The invention relates to the technical field of green building materials, in particular to SCS sub-nano silicon spar prepared by utilizing industrial full solid wastes and a preparation method thereof.
Background
Since 2010, the national intensive housing industrialization and assembly type building industry support policies actively encourage the development of assembly type building industries such as PC prefabricated buildings, steel structure assembly type buildings, cold-formed thin-wall integrated houses and the like. The traditional concrete building can not meet the requirements of the housing industrialization and the assembly type building development.
The SCS sub-nano silica stone new material is a high-end novel environment-friendly green building material with a special physical structure, which is sintered by using a sub-nano micro-structuring agent core technical formula, an artificial crystal control technology, an intelligent production line and a modern process and taking a large amount of industrial solid wastes such as drilling rock chips, quartz sand tailings, river silt, ceramic tailings, polishing waste residues, blast furnace waste residues, coal gangue, fly ash and the like as main raw materials.
Each performance index of the SCS sub-nano silica stone new material is obviously superior to that of the similar building material products, the self weight of the building can be greatly reduced, and the effective use area is increased. Through intelligent flexible production, the integration of different building parts can be met, the construction period is shortened, the building quality is improved, the construction cost is greatly reduced, the assembly rate and the industrialization level of a building are effectively improved, the building industrialization and the housing industrialization are realized, the assembly type building development trend is met, the competitive advantage is obvious, and the market prospect is wide.
The main raw materials of the new SCS sub-nano silicon spar material in the production process are industrial solid wastes, and enterprises which generate the industrial solid wastes in the peripheral area are usually selected to provide the new SCS sub-nano silicon spar material for free, but the added auxiliary mineral raw materials and chemical raw materials need to be purchased according to the standard market price, so that the formula and the overall production cost of the new SCS sub-nano silicon spar material are increased, and the market application and popularization of the product are influenced. Meanwhile, as the auxiliary raw materials are added in the formula, the addition amount of the whole industrial solid waste in the formula is reduced, and the capacity of a production line for treating the industrial solid waste is reduced.
Therefore, the existing SCS sub-nano silica stone technology has the problems of higher cost and low industrial solid waste treatment capacity.
Disclosure of Invention
In order to solve the problems of higher cost and low industrial solid waste treatment capacity of the conventional SCS sub-nano silicon spar technology, the invention provides SCS sub-nano silicon spar prepared by utilizing industrial full solid waste and a preparation method thereof. .
The invention relates to SCS sub-nano silicon spar prepared by utilizing industrial full solid wastes, which consists of the following raw materials in percentage by mass: 30-50% of quartz sand tailings, 30-50% of ceramic polishing slag, 5-10% of coal gangue, 3-8% of steel slag and 5-10% of potassium permanganate tailings.
Furthermore, the ceramic polishing slag is fine powder with the fineness of more than 300 meshes generated after high-speed grinding and polishing are carried out in the production process of the ceramic floor tiles of a ceramic floor tile factory. The SCS sub-nano silicon spar prepared by the polishing slag has more uniform pore diameter.
Further, the potassium permanganate tailings are solid wastes generated in the production process of industrial potassium permanganate, and the main component is controlled to be SiO218～29wt％、Al2O34～16wt％、K2O 10～15wt％、CaO 20～24wt％。
The invention also provides a preparation method of the SCS sub-nano silicon spar, which comprises the following steps:
s1, mixing the formula raw materials:
accurately weighing quartz sand tailings, ceramic polishing residues, coal gangue, steel slag and potassium permanganate tailings according to a formula ratio, and uniformly mixing;
s2, preparing slurry:
mixing the raw material uniformly mixed in the step S1 with water and grinding media according to the weight ratio of 3: 1: 2, putting the mixture into a ball mill, performing ball milling for 3-8 hours, discharging the slurry, and filtering to obtain SCS sub-nano silicon spar raw material slurry;
s3, spray granulation:
carrying out spray granulation on the SCS sub-nano-silicon spar raw material slurry prepared in the step S2 to prepare granular powder with the moisture content less than or equal to 8%;
s4, a material distribution process:
uniformly paving the SCS sub-nano silicon spar particle powder prepared in the step S3 in a mould made of refractory materials according to the specified thickness;
s5, firing process:
and (4) conveying the refractory mould filled with the SCS sub-nano silicon spar particle powder in the step (S4) into a kiln, burning to 1130-1230 ℃ according to a process burning curve, preserving heat, and annealing in the kiln to obtain the SCS sub-nano silicon spar blank plate product.
Further, in the step S2, the grinding medium is alumina balls, the content of alumina is not less than 60%, and the abrasion is not more than 0.2%.
Further, in the step S4, the qualified spray granulation particle powder is uniformly laid in a mold made of silicon carbide or cordierite or mullite refractory material according to the thickness of 3-6 cm, and the high-temperature-resistant 1250-DEG C fiber paper is laid on the mold.
Further, the firing profile in step S5 is:
heating up at a rate of 15-20 ℃/min from room temperature to 200 ℃;
the temperature rise rate is 9-12 ℃/min from 200 ℃ to 650 ℃;
heating up at a rate of 3-6 ℃/min from 650 ℃ to 980 ℃;
heating rate of 2-5 ℃/min is adopted from 980 ℃ to 1100 ℃;
the temperature rise rate is 1-3 ℃/min from 1100 ℃ to 1130-1230 ℃.
Further, the heat preservation time in the temperature range of 1130-1230 ℃ in the step S5 is 30-90 min.
Further, in the step S5, the temperature of the annealing is decreased from the firing temperature to 820 ℃ at a cooling rate of 15 ℃/min, and then the temperature is decreased to room temperature at a cooling rate of 4 ℃/min.
The SCS sub-nano silicon-spar plate prepared by the preparation method has the volume weight of 360-480 kg/m3The compression strength is more than or equal to 5MPa, and the water absorption of the product is less than or equal to 2 percent.
Compared with the prior art, the invention has the following beneficial effects:
the invention better solves the problems that the existing SCS sub-nano silica stone new material has high production cost and influences the market popularization and application of the product due to the addition of mineral raw materials and chemical raw materials in the formula. Meanwhile, the consumption of industrial solid waste in the formula is increased, and the SCS sub-nano silicon spar is prepared by completely adopting industrial solid waste as the raw materials of the formula. The yield of single-line treatment of industrial solid waste is increased, the resource utilization of the solid waste is improved, and the method has good economic value and environmental protection value.
Detailed Description
The first embodiment is as follows:
weighing 30 wt% of quartz sand tailings, 50 wt% of ceramic polishing slag, 10 wt% of coal gangue, 5 wt% of steel slag and 5 wt% of potassium permanganate tailings according to a proportion, filling the mixed powder material into a ball milling tank, and mixing the mixed powder material, water and aluminum balls 3 in a grinding medium: 1: 2, ball milling for 3 hours, discharging the slurry, sieving the slurry by a 100-mesh standard sieve, and performing spray granulation to obtain granular powder with the water content of 6 percent. And pouring the spray granulation powder into a cordierite refractory mold paved with fiber paper, leveling, uniformly distributing the material with the thickness of 4mm, and sintering in an electric furnace. Heating from room temperature to 200 ℃ at a heating rate of 18 ℃; heating from 200 ℃ to 650 ℃ at a heating rate of 12 ℃/min; heating up to 980 ℃ from 650 ℃ by adopting a heating rate of 6 ℃/min; heating up to 1100 ℃ from 980 ℃ by adopting a heating rate of 5 ℃/min; the temperature is kept for 30 minutes from 1100 ℃ to 1150 ℃ at the temperature rise rate of 3 ℃/min. The temperature reduction section adopts the temperature reduction rate of 15 ℃/min to reduce the temperature from the sintering temperature to 820 ℃, and then adopts the temperature reduction rate of 4 ℃/min to reduce the temperature to the room temperature. And finally, grinding to obtain the SCS sub-nano silicon-spar plate.
The volume weight of the prepared SCS sub-nano silica stone plate is 470kg/m3The volume water absorption is 1 percent, and the compressive strength is 7.2 MPa.
Example two:
weighing 40 wt% of quartz sand tailings, 42 wt% of ceramic polishing slag, 8 wt% of coal gangue, 4 wt% of steel slag and 6 wt% of potassium permanganate tailings according to the proportion, filling the mixed powder material into a ball milling tank, and mixing the mixed powder material, water and aluminum balls 3 in a grinding medium: 1: 2, ball milling for 5 hours, discharging the slurry, sieving the slurry by a 100-mesh standard sieve, and performing spray granulation to obtain granular powder with the water content of 5 percent. And pouring the spray granulation powder into a mullite refractory mold paved with fiber paper, leveling, uniformly distributing, and sintering in an electric furnace, wherein the thickness of the powder is 5 mm. Heating from room temperature to 200 ℃ at a heating rate of 16 ℃; heating from 200 ℃ to 650 ℃ at a heating rate of 10 ℃/min; heating up to 980 ℃ from 650 ℃ by adopting a heating rate of 4 ℃/min; heating up to 1100 ℃ from 980 ℃ by adopting a heating rate of 3 ℃/min; the temperature is kept for 60 minutes from 1100 ℃ to 1190 ℃ at the temperature rise rate of 1.5 ℃/min. The temperature reduction section adopts the temperature reduction rate of 15 ℃/min to reduce the temperature from the sintering temperature to 820 ℃, and then adopts the temperature reduction rate of 4 ℃/min to reduce the temperature to the room temperature. And finally, grinding to obtain the SCS sub-nano silicon-spar plate.
The volume weight of the prepared SCS sub-nano silicon spar plate is 432kg/m3The volume water absorption is 1.2 percent, and the compressive strength is 6 MPa.
Example three:
weighing 46 wt% of quartz sand tailings, 35 wt% of ceramic polishing slag, 7 wt% of coal gangue, 5 wt% of steel slag and 7 wt% of potassium permanganate tailings according to the proportion, filling the mixed powder material into a ball milling tank, and mixing the mixed powder material, water and aluminum balls 3 in a grinding medium: 1: 2, ball milling for 7 hours, discharging the slurry, sieving the slurry by a 100-mesh standard sieve, and performing spray granulation to obtain granular powder with the water content of 5.6 percent. And pouring the spray granulation powder into a silicon carbide refractory mould paved with fiber paper, scraping, uniformly distributing the powder with the thickness of 6mm, and sintering in an electric furnace. Raising the temperature from room temperature to 200 ℃ by adopting a temperature raising rate of 15 ℃; heating from 200 ℃ to 650 ℃ at a heating rate of 9 ℃/min; heating up to 980 ℃ from 650 ℃ by adopting a heating rate of 3 ℃/min; heating up to 1100 ℃ from 980 ℃ by adopting a heating rate of 2 ℃/min; the temperature is kept for 45 minutes from 1100 ℃ to 1210 ℃ at the heating rate of 1 ℃/min. The temperature reduction section adopts the temperature reduction rate of 15 ℃/min to reduce the temperature from the sintering temperature to 820 ℃, and then adopts the temperature reduction rate of 4 ℃/min to reduce the temperature to the room temperature. And finally, grinding to obtain the SCS sub-nano silicon-spar plate.
The volume weight of the prepared SCS sub-nano silica stone plate is 395kg/m3The volume water absorption is 1.4 percent, and the compressive strength is 5.8 MPa.
Example four:
weighing 50 wt% of quartz sand tailings, 30 wt% of ceramic polishing slag, 5 wt% of coal gangue, 5 wt% of steel slag and 10 wt% of potassium permanganate tailings according to a proportion, filling the mixed powder material into a ball milling tank, and mixing the mixed powder material, water and aluminum balls 3 in a grinding medium: 1: 2, ball milling for 8 hours, discharging the slurry, sieving the slurry by a 100-mesh standard sieve, and performing spray granulation to obtain granular powder with the water content of 8 percent. And pouring the spray granulation powder into a silicon carbide refractory mould paved with fiber paper, scraping, uniformly distributing the powder with the thickness of 3mm, and sintering in an electric furnace. Raising the temperature from room temperature to 200 ℃ by adopting a temperature raising rate of 20 ℃; heating from 200 ℃ to 650 ℃ at a heating rate of 11 ℃/min; heating up to 980 ℃ from 650 ℃ by adopting a heating rate of 4 ℃/min; heating up to 1100 ℃ from 980 ℃ by adopting a heating rate of 4 ℃/min; the temperature is kept for 50 minutes from 1100 ℃ to 1220 ℃ at the temperature rise rate of 2 ℃/min. The temperature reduction section adopts the temperature reduction rate of 15 ℃/min to reduce the temperature from the sintering temperature to 820 ℃, and then adopts the temperature reduction rate of 4 ℃/min to reduce the temperature to the room temperature. And finally, grinding to obtain the SCS sub-nano silicon-spar plate.
The volume weight of the prepared SCS sub-nano silica stone plate is 385kg/m3The volume water absorption is 1.6 percent, and the compressive strength is 5.2 MPa.
Example five:
weighing 34 wt% of quartz sand tailings, 45 wt% of ceramic polishing slag, 9 wt% of coal gangue, 3 wt% of steel slag and 9 wt% of potassium permanganate tailings according to a proportion, filling the above-mentioned mixed powder material into a ball milling tank, and mixing the mixed powder material, water and aluminum balls 3 in a grinding medium: 1: 2, ball milling for 6 hours, discharging the slurry, sieving the slurry by a 100-mesh standard sieve, and performing spray granulation to obtain granular powder with the water content of 5 percent. And pouring the spray granulation powder into a silicon carbide refractory mould paved with fiber paper, scraping, uniformly distributing the powder with the thickness of 6mm, and sintering in an electric furnace. Heating from room temperature to 200 ℃ at a heating rate of 17 ℃; heating from 200 ℃ to 650 ℃ at a heating rate of 11 ℃/min; heating up to 980 ℃ from 650 ℃ by adopting a heating rate of 5 ℃/min; heating up to 1100 ℃ from 980 ℃ by adopting a heating rate of 3.5 ℃/min; the temperature is kept for 90 minutes from 1100 ℃ to 1130 ℃ at the temperature rise rate of 2 ℃/min. The temperature reduction section adopts the temperature reduction rate of 15 ℃/min to reduce the temperature from the sintering temperature to 820 ℃, and then adopts the temperature reduction rate of 4 ℃/min to reduce the temperature to the room temperature. And finally, grinding to obtain the SCS sub-nano silicon-spar plate.
The volume weight of the prepared SCS sub-nano silica stone plate is 438kg/m3The volume water absorption rate is 0.96 percent, and the compressive strength is 7.3 MPa.
The SCS sub-nano silicon spar is prepared from all industrial solid waste raw materials, has high compressive strength and low water absorption rate, improves the resource utilization of solid waste, and has good economic value and environmental protection value.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements, etc. made by those skilled in the art within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The SCS sub-nano silicon spar prepared by utilizing industrial full solid wastes is characterized in that the silicon spar is composed of the following raw materials in percentage by mass: 30-50% of quartz sand tailings, 30-50% of ceramic polishing slag, 5-10% of coal gangue, 3-8% of steel slag and 5-10% of potassium permanganate tailings.
2. The SCS sub-nano silica spar according to claim 1, wherein the ceramic polishing slag is fine powder with fineness of more than 300 meshes generated after high-speed grinding and polishing of ceramic floor tiles in a ceramic floor tile factory.
3. The SCS sub-nano-silica spar according to claim 1, wherein the potassium permanganate tailings are solid wastes generated in the production process of industrial potassium permanganate, and the main component is controlled to be SiO218～29wt％、Al2O34～16wt％、K2O 10～15wt％、CaO 20～24wt％。
4. The method for preparing SCS sub-nano-silica spar according to claims 1 to 3, wherein the method comprises the following steps:
s1, mixing the formula raw materials:
accurately weighing quartz sand tailings, ceramic polishing residues, coal gangue, steel slag and potassium permanganate tailings according to a formula ratio, and uniformly mixing;
s2, preparing slurry:
mixing the raw material uniformly mixed in the step S1 with water and grinding media according to the weight ratio of 3: 1: 2, putting the mixture into a ball mill, performing ball milling for 3-8 hours, discharging the slurry, and filtering to obtain SCS sub-nano silicon spar raw material slurry;
s3, spray granulation:
carrying out spray granulation on the SCS sub-nano-silicon spar raw material slurry prepared in the step S2 to prepare granular powder with the moisture content less than or equal to 8%;
s4, a material distribution process:
uniformly paving the SCS sub-nano silicon spar particle powder prepared in the step S3 in a mould made of refractory materials according to the specified thickness;
s5, firing process:
and (4) conveying the refractory mould filled with the SCS sub-nano silicon spar particle powder in the step (S4) into a kiln, burning to 1130-1230 ℃ according to a process burning curve, preserving heat, and annealing in the kiln to obtain the SCS sub-nano silicon spar blank plate product.
5. The method of preparing SCS sub-nano-silica-spar according to claim 4, wherein the grinding media in step S2 are alumina balls, the content of alumina is greater than or equal to 60%, and the abrasion is less than or equal to 0.2%.
6. The method for preparing SCS sub-nano-silica-spar according to claim 4, wherein the step S4 is to uniformly lay qualified spray granulation particle powder in a mold composed of silicon carbide, cordierite or mullite refractory material according to a thickness of 3-6 cm, and the mold is laid with high temperature 1250 ℃ resistant fiber paper.
7. The method for preparing SCS sub-nano-silica spar according to any of claims 4 to 6, wherein the firing profile in step S5 is:
heating up at a rate of 15-20 ℃/min from room temperature to 200 ℃;
the temperature rise rate is 9-12 ℃/min from 200 ℃ to 650 ℃;
heating up at a rate of 3-6 ℃/min from 650 ℃ to 980 ℃;
heating rate of 2-5 ℃/min is adopted from 980 ℃ to 1100 ℃;
the temperature rise rate is 1-3 ℃/min from 1100 ℃ to 1130-1230 ℃.
8. The method for preparing SCS sub-nano-silica-spar according to claim 7, wherein the temperature of step S5 is 1130-1230 ℃ for 30-90 min.
9. The method for preparing SCS sub-nano silica spar according to claim 7, wherein the annealing in step S5 is performed by decreasing the temperature from the firing temperature to 820 ℃ with a temperature decrease rate of 15 ℃/min, and then decreasing the temperature to room temperature with a temperature decrease rate of 4 ℃/min.
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| CN201911259099.6A Pending CN111056820A (en) | 2019-12-10 | 2019-12-10 | SCS sub-nano silicon spar prepared by utilizing industrial full solid waste and preparation method thereof |
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| CN114644505A (en) * | 2022-03-21 | 2022-06-21 | 筑邦建筑科技投资(深圳)有限公司 | High-quality light-weight silicon spar wallboard and preparation method |
| CN114644509A (en) * | 2022-03-21 | 2022-06-21 | 筑邦建筑科技投资(深圳)有限公司 | Light-weight silicon spar wallboard with high-content steel slag waste and preparation method |
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Application publication date: 20200424 |