CN115893976A - Method for preparing heat-resistant marmite by using waste marmite material - Google Patents
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Abstract
The invention discloses a method for preparing a heat-resistant marmite by using waste marmite materials, and belongs to the technical field of marmite preparation. The invention re-processes unqualified products in production into raw materials, and introduces the raw materials into the formula for manufacturing the heat-resistant marmite again, thereby not only effectively utilizing the unqualified marmite and reducing the cost of the raw materials, but also playing the roles of energy saving and environmental protection and realizing self-recycling.
Description
Technical Field
The invention belongs to the technical field of marmite preparation, and particularly relates to a method for preparing a heat-resistant marmite by using waste marmite materials.
Background
The traditional earthenware pot is made of ceramic products compounded by quartz, feldspar, clay and other raw materials which are difficult to transfer heat, and is fired at high temperature, and has the characteristics of air permeability, adsorbability, uniform heat transfer, slow heat dissipation and the like. In the production process, because the waste materials generated in the processes of forming, drying, glazing, carrying, roasting and storing are produced, the existing treatment mode is usually to solve the problem that the ceramic waste materials are simply buried, or the ceramic waste materials are used for burying gullies, roadbeds and the like, and even are directly dumped in places such as roadsides, farmlands, canals and the like, and because the ceramic waste materials cannot be degraded, the waste materials contain chemical substances and pollute natural environments such as soil, air and the like. In addition, the ceramic raw material is a non-renewable resource, and the storage amount is almost exhausted under the condition that the ceramic capacity is greatly expanded in the last ten years, so that how to fully utilize the waste raw material generated in the ceramic production, save the resource, reduce the waste and reduce the generation of pollutants from the source is an urgent problem to be solved at the present stage.
Disclosure of Invention
Aiming at the problem that the existing discarded and defective heat-resistant marmite can not be reasonably recycled, the invention provides a method for preparing a heat-resistant marmite by using waste marmite materials.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing a heat-resistant marmite by using waste marmite materials comprises the following steps:
step 1, firstly, crushing unqualified heat-resistant marmite materials, and then sieving to obtain granular powder for later use;
step 2, taking the Datong sandstone, the talcum powder, the Changhu soil, the spodumene, the calcined alum stone powder and the waste casserole powder which are mixed by certain weight, adding the mixture into a wet ball mill after uniformly mixing, grinding and finely crushing the mixture, sieving the mixture, and putting the mixture into a slurry pool for later use;
step 3, removing iron and ferric oxide in the slurry tank, and sieving to remove unqualified particle impurities to obtain purified particle-grade uniformly-mixed qualified slurry;
step 4, pumping the qualified slurry into a mud filter, and dehydrating to form a mud bottle with the water content of 20-25%;
step 5, performing first vacuum pugging in a vacuum pugging machine with the vacuum not lower than 0.09Mpa, and then performing vacuum pugging on mud strips; ageing in a clean mud warehouse with the ambient temperature of 20-25 ℃ and the relative humidity of 50HR, wherein the environment is clean and tidy, and mud strips cannot fall to the ground and can not be stained, so that the mud strips can not be mixed with impurities;
step 6, performing second vacuum pugging during forming use, wherein the vacuum degree is not lower than-0.092 MPa, and the purpose is to divide the mud strips into uniform mud sections with certain diameters and thicknesses which meet the metering requirements of various formed varieties;
step 7, producing blank products with various shapes by using forming equipment, drying to automatic demoulding, drying the demoulded products in a drying room with the ring temperature of 60 ℃, and controlling the moisture to be below 2% to obtain qualified blanks;
step 8, polishing and rounding the blank, polishing and flattening the bonding part, carefully inspecting the blank part by using clear water, and drying in a blank warehouse at the ambient temperature of 30 ℃ to obtain a qualified green blank;
step 9, preparing glaze and glazing;
and 10, putting the glazed green blank in the step 9 into a kiln, and sintering the green blank into a product by selecting a set sintering curve.
Further, the mesh number sieved in the step 1 is 10 meshes.
Further, the wet ball mill in the step 2 is as follows: ball stones: water = 1.
Further, the fineness standard of the fine grinding in the step 2 is 0.5-0.8%.
Further, the components in the step 2, by weight, of the major stone, the talcum powder, the ordinary ditch soil, the spodumene, the calcined alum stone powder and the waste casserole powder are as follows: 23 to 34 percent of Datong sandstone, 10 to 18 percent of talcum powder, 20.5 to 28.5 percent of homely ditch soil, 7 to 11 percent of spodumene, 3 to 9 percent of calcined aluminite powder and 18 to 25 percent of waste earthenware pot powder.
Further, the aging period in the step 5 is 3 to 7 days.
Further, the step 9 of preparing the glaze and applying the glaze comprises the following specific steps: firstly, selecting the following raw materials in parts by weight: 20-40% of feldspar, 5-10% of quartz, 8-18% of limestone, 3-8% of kaolin, 8-13% of talc and 10-20% of spodumene; grinding, sieving with an 8-mesh sieve, filling into a wet ball mill, finely crushing (according to the proportion of ball stone: water =1:2.0: 0.8) to achieve the fineness of 0.05%, and then sieving with a 150-mesh standard sieve, wherein the water content is controlled to be 30-35%; after the ground glaze slip is screened by a standard sieve of 150 meshes, a high-strength iron remover is used for removing iron twice to prepare qualified glaze slip; and glazing by adopting a glaze spraying method to obtain a glazed product.
Further, the firing profile in the step 10 is: 60 minutes of seeds are burnt at 0 to 200 ℃, 60 minutes of seeds are burnt at 200 to 400 ℃, 90 minutes of seeds are burnt at 400 to 600 ℃, 75 minutes of seeds are burnt at 600 to 900 ℃ and 100 minutes of seeds are burnt at 900 to 1230 ℃.
Further, after firing by the firing profile, it is necessary to keep the temperature for 60 minutes for natural cooling or rapid cooling.
Compared with the prior art, the invention has the following advantages:
the method for preparing the heat-resistant marmite by using the waste marmite material comprises the steps of re-processing unqualified products in production into raw materials, and introducing the raw materials into a formula for manufacturing the heat-resistant marmite again, so that the unqualified marmite is effectively utilized, the cost of the raw materials is reduced, the effects of energy conservation and environmental protection are achieved, and self-recycling is realized.
Drawings
FIG. 1 is a schematic view of a firing curve according to the present invention.
Detailed Description
The raw material components of the homely ditch soil comprise: 8.30% LiI, 59.59% SiO 2 、26.07％AI 2 O 3 、1.20％Fe 2 O 3 、0.2％TiO 2 、2.20％K 2 O、0.65％Na 2 O、0.001％CaO、28％Mg；
The talcum powder comprises the following raw material components: 5.02% LiI, 61.06% SiO 2 、0.20％AI 2 O 3 、0.65％Fe 2 O 3 、0.06％K 2 O、0.08％CaO、33.18％Mg
The Guangxi carclazyte comprises the following raw material components: 11.10% LiI, 55.45% SiO 2 、30.52％AI 2 O 3 、0.16％Fe 2 O 3 、0.01％TiO 2 、2.50％K 2 O、0.07％Na 2 O、0.59％CaO、0.14％Mg；
The spodumene comprises the following raw material components: 63.35% LiI, 27.54% SiO 2 、0.40％AI 2 O 3 、0.02％Fe 2 O 3 、0.90％TiO 2 、0.40％K 2 O、0.40％Na 2 O；
The calcined alum stone powder comprises the following raw material components: 55.62% LiI, 41.61% SiO 2 、0.51％AI 2 O 3 、1.37％Fe 2 O 3 、0.27％Na 2 O、0.19％CaO。
Example 1
A method for preparing a heat-resistant marmite by using waste marmite materials comprises the following steps:
step 1, firstly, crushing unqualified heat-resistant marmite materials, and then sieving the crushed materials by a 10-mesh sieve to obtain granular powder for later use;
step 2, taking 23-34% of large common sandstone, 10-18% of talcum powder, 20.5-28.5% of homely ditch soil, 7-11% of spodumene, 3-9% of calcined aluminite powder and 18-25% of waste casserole powder, uniformly mixing, adding into a wet ball mill (according to the proportion of ball stone: water = 1;
step 3, purifying metallic iron mechanically substituted in the slurry and ferric oxide in the raw material by a wet magnetic separator, and sieving by a vibrating screen of 200 meshes to remove unqualified particle impurities to obtain purified particle-level uniformly-mixed qualified slurry;
step 4, pumping the qualified slurry mixed and stirred uniformly in the slurry pool into a sludge filter by using a plunger pump, and dehydrating the slurry by using filter cloth to form a slurry bottle with the water content of 20-25%;
step 5, performing first vacuum pugging in a vacuum pugging machine with the vacuum not lower than 0.09Mpa, and then performing vacuum pugging on the mud strips; the mud strips obtained by once vacuum pugging are stored in a clean mud warehouse with the ambient temperature of 20-25 ℃ and the relative humidity of 50HR for ageing, the ageing period is 3-7 days, the environment is clean and tidy, the mud strips cannot fall to the ground and can not be stained, and the mud strips can not be mixed with impurities;
step 6, performing second vacuum pugging during forming use, wherein the vacuum degree is not lower than-0.092 MPa, and the purpose is to divide the mud strips into uniform mud sections with certain diameters and thicknesses which meet the metering requirements of various formed varieties;
step 7, producing blank products with various shapes by using forming equipment, drying to automatic demoulding, drying the demoulded products in a drying room with the ring temperature of 60 ℃, and controlling the moisture to be below 2% to obtain qualified blanks; in the process, blank products of heat-resistant daily cookers and kitchen supplies with various shapes and capacities are produced through models and manual design, in the process, the product design must be reasonable, the sizes of all parts must be accurate, the gravity and stress analysis is fully considered, the bottom heavy product is made to be light in weight, the stress is uniform, the process is the key point of the product shape, and the product can generate the defects of deformation, cracking, collapse and the like in the process of burning due to unreasonable design to form secondary waste products;
step 8, polishing and rounding the blank, polishing and flattening the bonding part, carefully inspecting the blank part by using clear water, and drying in a blank warehouse at the ambient temperature of 30 ℃ to obtain a qualified green blank; adopting a mechanical edge trimming machine or manual inspection, adopting tools including sand paper, iron sand and a knife, polishing and rounding the edge of a blank, polishing and flattening the front surface, the back surface and a bonding part of a product, and carefully inspecting the blank part by using clear water to ensure that the product is round and smooth in the whole body and is easy to have molding defects such as rolling marks, mud snatching, mud residues, blank lack, pimples and the like;
step 9, preparing glaze and glazing; firstly, selecting the following raw materials in parts by weight: 20-40% of feldspar, 5-10% of quartz, 8-18% of limestone, 3-8% of kaolin, 8-13% of talc and 10-20% of spodumene; after being crushed and sieved by a sieve of 8 meshes, the mixture is put into a wet ball mill for fine crushing (the mixture is packed according to the proportion of ball stone: water =1: 2.0; passing the ground glaze slip through a standard sieve of 150 meshes, and then removing iron twice by using a high-strength iron remover to prepare qualified glaze slip; and glazing by adopting a glaze spraying method to obtain a glazed product.
And 10, putting the green blank glazed in the step 9 into a kiln, putting the qualified green blank product with the moisture content of below 2% on smooth and qualified kiln furniture, carefully stacking the green blank on a kiln car, wherein the unqualified green blank cannot be put into the kiln, the product must be installed, the kiln furniture and a shed plate must be coated with an isolation layer, a shuttle kiln or a natural gas tunnel kiln is selected to set a firing curve for firing, the firing curve is shown in table 1, and the green blank is subjected to heat preservation for 60 minutes and is naturally cooled or rapidly cooled to obtain the qualified product.
TABLE 1 firing Curve Table
Example 2
A method for preparing a heat-resistant marmite by using waste marmite materials comprises the following steps:
step 1, firstly, crushing unqualified heat-resistant marmite materials, and then sieving the crushed materials by a 10-mesh sieve to obtain granular powder for later use;
step 2, taking 23% of Datong sandstone, 18% of talcum powder, 28.5% of homemade ditch soil, 7% of spodumene, 6% of calcined aluminite powder and 25% of waste casserole powder, uniformly mixing, adding into a wet ball mill (according to the proportion of material: ball stone: water =1: 2.0;
step 3, purifying metallic iron mechanically substituted in the slurry and ferric oxide in the raw material by a wet magnetic separator, and sieving by a vibrating screen of 200 meshes to remove unqualified particle impurities to obtain purified particle-grade uniformly-mixed qualified slurry;
step 4, pumping the qualified slurry uniformly mixed and stirred in the slurry pool into a sludge filter by using a plunger pump, and dehydrating by using filter cloth to form a sludge bottle with the water content within the range of 22%;
step 5, performing first vacuum pugging in a vacuum pugging machine with the vacuum not lower than 0.09Mpa, and then performing vacuum pugging on mud strips; the mud strips obtained by once vacuum pugging are neatly stored in a clean mud warehouse with the ambient temperature of 20-25 ℃ and the relative humidity of 50HR for ageing, the ageing period is 7 days, the environment is clean and tidy, the mud strips cannot fall to the ground and can not be dirty, and the mud strips can not be mixed with impurities;
step 6, performing second vacuum pugging during forming use, wherein the vacuum degree is not lower than-0.092 MPa, and the purpose is to divide the mud strips into uniform mud sections with certain diameters and thicknesses which meet the metering requirements of various formed varieties;
step 7, producing blank products with various shapes by using forming equipment, drying to automatic demoulding, drying the demoulded products in a drying room with the ring temperature of 60 ℃, and controlling the moisture to be below 2% to obtain qualified blanks; in the process, blank products of heat-resistant daily cookers and kitchen supplies with various shapes and capacities are produced through models and manual design, in the process, the product design must be reasonable, the sizes of all parts must be accurate, the gravity and stress analysis is fully considered, the bottom heavy product is made to be light in weight, the stress is uniform, the process is the key point of the product shape, and the product can generate the defects of deformation, cracking, collapse and the like in the process of burning due to unreasonable design to form secondary waste products;
step 8, polishing and rounding the blank, polishing and flattening the bonding part, carefully inspecting the blank part by using clear water, and drying in a blank warehouse at the ambient temperature of 30 ℃ to obtain a qualified green blank; adopting a mechanical edge trimming machine or manual inspection, adopting tools including sand paper, iron sand and a knife, polishing and rounding the edge of a blank, polishing and flattening the front surface, the back surface and a bonding part of a product, and carefully inspecting the blank part by using clear water to ensure that the product is round and smooth in the whole body and is easy to have molding defects such as rolling marks, mud snatching, mud residues, blank lack, pimples and the like;
step 9, preparing glaze and glazing; firstly, selecting the following raw materials in parts by weight: 25% of feldspar, 10% of quartz, 8% of limestone, 8% of kaolin, 13% of talc and 10% of spodumene; after being crushed and sieved by a sieve of 8 meshes, the mixture is put into a wet ball mill to be finely crushed (the mixture is loaded according to the proportion of ball stones to water =1:2.0: 0.8) to achieve the fineness of 0.05 percent, and then the mixture is sieved by a standard sieve of 150 meshes, and the water content is controlled to be 35 percent; after the ground glaze slip is screened by a standard sieve of 150 meshes, a high-strength iron remover is used for removing iron twice to prepare qualified glaze slip; and glazing by adopting a glaze spraying method to obtain a glazed product.
And 10, putting the green blank glazed in the step 9 into a kiln, putting the qualified green blank product with the moisture content of below 2% on smooth and qualified kiln furniture, carefully stacking the green blank on a kiln car, wherein the unqualified green blank cannot be put into the kiln, the product must be installed, the kiln furniture and a shed plate must be coated with an isolation layer, a shuttle kiln or a natural gas tunnel kiln is selected to set a firing curve for firing, the firing curve is shown in table 1, and the green blank is subjected to heat preservation for 60 minutes and is naturally cooled or rapidly cooled to obtain the qualified product.
Example 3
A method for preparing a heat-resistant marmite by using waste marmite materials comprises the following steps:
step 1, firstly, crushing unqualified heat-resistant marmite materials, and then sieving the crushed materials by a 10-mesh sieve to obtain granular powder for later use;
step 2, taking 27% of Datong sandstone, 15% of talcum powder, 23% of Vanjiao soil, 9% of spodumene, 7% of calcined aluminite powder and 19% of waste marmite powder, uniformly mixing, adding into a wet ball mill (according to the proportion of material: ball stone: water =1: 2.0);
step 3, purifying metallic iron mechanically substituted in the slurry and ferric oxide in the raw material by a wet magnetic separator, and sieving by a vibrating screen of 200 meshes to remove unqualified particle impurities to obtain purified particle-level uniformly-mixed qualified slurry;
step 4, pumping the qualified slurry uniformly mixed and stirred in the slurry pool into a sludge filter by using a plunger pump, and dehydrating by using filter cloth to form a sludge bottle with the water content within the range of 25%;
step 5, performing first vacuum pugging in a vacuum pugging machine with the vacuum not lower than 0.09Mpa, and then performing vacuum pugging on mud strips; the mud strips obtained by once vacuum pugging are neatly stored in a clean mud warehouse with the ambient temperature of 20-25 ℃ and the relative humidity of 50HR for ageing, the ageing period is 4 days, the environment is clean and tidy, the mud strips cannot fall to the ground and can not be dirty, and the mud strips can not be mixed with impurities;
step 6, performing second vacuum pugging during forming use, wherein the vacuum degree is not lower than-0.092 MPa, and the purpose is to divide the mud strips into uniform mud sections with certain diameters and thicknesses which meet the metering requirements of various formed varieties;
step 7, producing blank products with various shapes by using forming equipment, drying to automatic demoulding, drying the demoulded products in a drying room with the ring temperature of 60 ℃, and controlling the moisture to be below 2% to obtain qualified blanks; in the process, blank products of heat-resistant daily cookers and kitchen supplies with various shapes and capacities are produced through models and manual design, the product design must be reasonable, the sizes of all parts must be accurate, the gravity and stress analysis is fully considered, the blank products are heavy and light in weight and uniform in stress, the process is the key point of the product shape, and the defects of deformation, cracking, collapse and the like of the products in the process of burning can be caused by unreasonable design, so that secondary waste products are formed;
step 8, polishing and rounding the blank, polishing and flattening the bonding part, carefully inspecting the blank part by using clear water, and drying in a blank warehouse at the ambient temperature of 30 ℃ to obtain a qualified green blank; adopting a mechanical edge trimming machine or manual inspection, adopting tools including sand paper, iron sand and a knife, polishing and rounding the edge of a blank, polishing and flattening the front surface, the back surface and a bonding part of a product, and carefully inspecting the blank part by using clear water to ensure that the product is round and smooth in the whole body and is easy to have molding defects such as rolling marks, mud snatching, mud residues, blank lack, pimples and the like;
step 9, preparing glaze and glazing; firstly, selecting the following raw materials in parts by weight: 24% of feldspar, 5% of quartz, 16% of limestone, 6% of kaolin, 12% of talc and 16% of spodumene; after being crushed and sieved by an 8-mesh sieve, the mixture is put into a wet ball mill to be finely crushed (the mixture is loaded according to the proportion of ball stones to water =1:2.0: 0.8) to achieve the fineness of 0.05 percent, and then the mixture is sieved by a 150-mesh standard sieve, and the water content is controlled to be 34 percent; after the ground glaze slip is screened by a standard sieve of 150 meshes, a high-strength iron remover is used for removing iron twice to prepare qualified glaze slip; and glazing by adopting a glaze spraying method to obtain a glazed product.
And 10, putting the glazed green blank obtained in the step 9 into a kiln, putting the qualified green blank product with the moisture content of below 2 percent on smooth and qualified kiln furniture, carefully stacking the green blank on a kiln car, wherein the unqualified green blank cannot be put into the kiln, the product must be placed correctly, the kiln furniture and a shed plate must be coated with an isolation layer, a shuttle kiln or a natural gas tunnel kiln is selected to set a firing curve, the firing curve is shown in table 1, and the temperature is kept for 60 minutes after firing for natural cooling or rapid cooling to obtain the qualified product.
Example 4
A method for preparing a heat-resistant marmite by using waste marmite materials comprises the following steps:
step 1, firstly, crushing unqualified heat-resistant marmite materials, and then sieving the crushed materials by a 10-mesh sieve to obtain granular powder for later use;
step 2, taking 34% of the Datong sandstone, 12% of talcum powder, 24.5% of the ordinary ditch soil, 10% of spodumene, 3% of calcined alum stone powder and 20% of waste marmite powder, uniformly mixing, adding into a wet ball mill (according to the proportion of material: ball stone: water =1: 2.0);
step 3, purifying metallic iron mechanically substituted in the slurry and ferric oxide in the raw material by a wet magnetic separator, and sieving by a vibrating screen of 200 meshes to remove unqualified particle impurities to obtain purified particle-grade uniformly-mixed qualified slurry;
step 4, pumping the qualified slurry mixed and uniformly stirred in the slurry pool into a sludge filter by using a plunger pump, and dehydrating by using filter cloth to form a sludge bottle with the water content of 22%;
step 5, performing first vacuum pugging in a vacuum pugging machine with the vacuum not lower than 0.09Mpa, and then performing vacuum pugging on mud strips; the mud strips obtained by once vacuum pugging are neatly stored in a clean mud warehouse with the ambient temperature of 20-25 ℃ and the relative humidity of 50HR for ageing, the ageing period is 3 days, the environment is clean and tidy, the mud strips cannot fall to the ground and can not be dirty, and the mud strips can not be mixed with impurities;
step 6, performing second vacuum pugging during forming use, wherein the vacuum degree is not lower than-0.092 MPa, and the purpose is to divide the mud strips into uniform mud sections with certain diameters and thicknesses which meet the metering requirements of various formed varieties;
step 7, producing blank products with various shapes by using forming equipment, drying to automatic demoulding, drying the demoulded products in a drying room with the ring temperature of 60 ℃, and controlling the moisture to be below 2% to obtain qualified blanks; in the process, blank products of heat-resistant daily cookers and kitchen supplies with various shapes and capacities are produced through models and manual design, the product design must be reasonable, the sizes of all parts must be accurate, the gravity and stress analysis is fully considered, the blank products are heavy and light in weight and uniform in stress, the process is the key point of the product shape, and the defects of deformation, cracking, collapse and the like of the products in the process of burning can be caused by unreasonable design, so that secondary waste products are formed;
step 8, polishing and rounding the blank, polishing and flattening the bonding part, carefully inspecting the blank part by using clear water, and drying in a blank warehouse at the ambient temperature of 30 ℃ to obtain a qualified green blank; adopting a mechanical edge trimming machine or manual inspection, adopting tools including sand paper, iron sand and a knife, polishing and rounding the edge of a blank, polishing and flattening the front surface, the back surface and a bonding part of a product, and carefully inspecting the blank part by using clear water to ensure that the product is round and smooth in the whole body and is easy to have molding defects such as rolling marks, mud snatching, mud residues, blank lack, pimples and the like;
step 9, preparing glaze and glazing; firstly, selecting the following raw materials in parts by weight: 35% of feldspar, 8% of quartz, 13% of limestone, 7% of kaolin, 10% of talc and 18% of spodumene; after being crushed and sieved by an 8-mesh sieve, the mixture is put into a wet ball mill to be finely crushed (the mixture is loaded according to the proportion of ball stones to water =1:2.0: 0.8) to achieve the fineness of 0.05 percent, and then the mixture is sieved by a 150-mesh standard sieve, and the water content is controlled to be 33 percent; after the ground glaze slip is screened by a standard sieve of 150 meshes, a high-strength iron remover is used for removing iron twice to prepare qualified glaze slip; and glazing by adopting a glaze spraying method to obtain a glazed product.
And 10, putting the green blank glazed in the step 9 into a kiln, putting the qualified green blank product with the moisture content of below 2% on smooth and qualified kiln furniture, carefully stacking the green blank on a kiln car, wherein the unqualified green blank cannot be put into the kiln, the product must be installed, the kiln furniture and a shed plate must be coated with an isolation layer, a shuttle kiln or a natural gas tunnel kiln is selected to set a firing curve for firing, the firing curve is shown in table 1, and the green blank is subjected to heat preservation for 60 minutes and is naturally cooled or rapidly cooled to obtain the qualified product.
Example 5
A method for preparing a heat-resistant marmite by using waste marmite materials comprises the following steps:
step 1, firstly, crushing unqualified heat-resistant marmite materials, and then sieving the crushed materials by a 10-mesh sieve to obtain granular powder for later use;
step 2, taking 30% of Datong sandstone, 16% of talcum powder, 20.5% of Vanjiau soil, 11% of spodumene, 9% of calcined aluminite powder and 25% of waste casserole powder, uniformly mixing, adding into a wet ball mill (according to the proportion of material: ball stone: water =1:2.0: 1), grinding into fine powder (the fineness standard is 0.5-0.8%), sieving through a 60-mesh sample sieve, and placing into a slurry pool for later use;
step 3, purifying metallic iron mechanically substituted in the slurry and ferric oxide in the raw material by a wet magnetic separator, and sieving by a vibrating screen of 200 meshes to remove unqualified particle impurities to obtain purified particle-grade uniformly-mixed qualified slurry;
step 4, pumping the qualified slurry uniformly mixed and stirred in the slurry pool into a sludge filter by using a plunger pump, and dehydrating by using filter cloth to form a sludge bottle with the water content within the range of 20%;
step 5, performing first vacuum pugging in a vacuum pugging machine with the vacuum not lower than 0.09Mpa, and then performing vacuum pugging on mud strips; the mud strips obtained by once vacuum pugging are neatly stored in a clean mud warehouse with the ambient temperature of 20-25 ℃ and the relative humidity of 50HR for ageing for 5 days, the environment must be clean and tidy, the mud strips cannot fall to the ground and can not be dirty, and the mud strips can not be mixed with impurities;
step 6, performing second vacuum pugging during forming use, wherein the vacuum degree is not lower than-0.092 MPa, and the purpose is to divide the mud strips into uniform mud sections with certain diameters and thicknesses which meet the metering requirements of various formed varieties;
step 7, producing blank products with various shapes by using forming equipment, drying to automatic demoulding, drying the demoulded products in a drying room with the ring temperature of 60 ℃, and controlling the moisture to be below 2% to obtain qualified blanks; in the process, blank products of heat-resistant daily cookers and kitchen supplies with various shapes and capacities are produced through models and manual design, in the process, the product design must be reasonable, the sizes of all parts must be accurate, the gravity and stress analysis is fully considered, the bottom heavy product is made to be light in weight, the stress is uniform, the process is the key point of the product shape, and the product can generate the defects of deformation, cracking, collapse and the like in the process of burning due to unreasonable design to form secondary waste products;
step 8, polishing and rounding the blank, polishing and flattening the bonding part, carefully inspecting the blank part by using clear water, and drying in a blank warehouse at the ambient temperature of 30 ℃ to obtain a qualified green blank; adopting a mechanical edge trimming machine or manual inspection, adopting tools including sand paper, iron sand and a knife, polishing and rounding the edge of a blank, polishing and flattening the front surface, the back surface and a bonding part of a product, and carefully inspecting the blank part by using clear water to ensure that the product is round and smooth in the whole body and is easy to have molding defects such as rolling marks, mud snatching, mud residues, blank lack, pimples and the like;
step 9, preparing glaze and glazing; firstly, selecting the following raw materials in parts by weight: 33% of feldspar, 7% of quartz, 18% of limestone, 3% of kaolin, 13% of talc and 18% of spodumene; after being crushed and sieved by an 8-mesh sieve, the mixture is put into a wet ball mill to be finely crushed (the mixture is loaded according to the proportion of ball stones to water =1:2.0: 0.8) to achieve the fineness of 0.05 percent, and then the mixture is sieved by a 150-mesh standard sieve, and the water content is controlled to be 33 percent; after the ground glaze slip is screened by a standard sieve of 150 meshes, a high-strength iron remover is used for removing iron twice to prepare qualified glaze slip; and glazing by adopting a glaze spraying method to obtain a glazed product.
And 10, putting the green blank glazed in the step 9 into a kiln, putting the qualified green blank product with the moisture content of below 2% on smooth and qualified kiln furniture, carefully stacking the green blank on a kiln car, wherein the unqualified green blank cannot be put into the kiln, the product must be installed, the kiln furniture and a shed plate must be coated with an isolation layer, a shuttle kiln or a natural gas tunnel kiln is selected to set a firing curve for firing, the firing curve is shown in table 1, and the green blank is subjected to heat preservation for 60 minutes and is naturally cooled or rapidly cooled to obtain the qualified product.
Those matters not described in detail in the present specification are well known in the art to which the skilled person pertains. Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all matters of the invention which utilize the inventive concepts are protected.
Claims (10)
1. A method for preparing a heat-resistant marmite by using waste marmite materials is characterized by comprising the following steps: the method comprises the following steps:
step 1, firstly, crushing unqualified heat-resistant marmite materials, and then sieving to obtain granular powder for later use;
step 2, taking the Datong sandstone, the talcum powder, the Changhu soil, the spodumene, the calcined alum stone powder and the waste casserole powder which are mixed according to a certain weight, adding the mixture into a wet ball mill after uniformly mixing, grinding, finely crushing, sieving and putting the mixture into a slurry pool for later use;
step 3, removing iron and ferric oxide in the slurry tank, and sieving to remove unqualified particle impurities to obtain purified particle-grade uniformly-mixed qualified slurry;
step 4, pumping the qualified slurry into a mud filter, and dehydrating to form a mud bottle with the water content of 20-25%;
step 5, performing first vacuum pugging in a vacuum pugging machine with the vacuum not lower than 0.09Mpa, and then performing vacuum pugging on mud strips; ageing at an ambient temperature of 20-25 ℃ and a relative humidity in a clean environment of 50 HR;
step 6, performing secondary vacuum pugging during forming and using, wherein the vacuum degree is not lower than-0.092 MPa;
step 7, producing blank products with various shapes by using forming equipment, drying to automatic demoulding, drying the demoulded products in a drying room with the ring temperature of 60 ℃, and controlling the moisture to be below 2% to obtain qualified blanks;
step 8, polishing and rounding the blank, polishing and flattening the bonding part, carefully inspecting the blank part by using clear water, and drying in a blank warehouse at the ambient temperature of 30 ℃ to obtain a qualified green blank;
step 9, preparing glaze and glazing;
and 10, putting the glazed green blank in the step 9 into a kiln, and sintering the green blank into a product by selecting a set sintering curve.
2. The method for preparing a heat-resistant marmite using the waste marmite material as claimed in claim 1, wherein the method comprises the following steps: the mesh number sieved in the step 1 is 10 meshes.
3. The method for preparing a heat-resistant marmite using the waste marmite material as claimed in claim 1, wherein the method comprises the following steps: the wet ball mill in the step 2 is as follows: ball stones: water = 1.
4. The method for preparing a heat-resistant marmite using the waste marmite material as claimed in claim 1, wherein the method comprises the following steps: the fineness standard of the grinding fine crushing in the step 2 is 0.5-0.8%.
5. The method for preparing a heat-resistant marmite using the waste marmite material as claimed in claim 1, wherein the method comprises the following steps: the components in the step 2 by weight of the major stone, the talcum powder, the Chanjiayu soil, the spodumene, the calcined alum stone powder and the waste casserole powder are as follows: 23-34% of Datong sandstone, 10-18% of talcum powder, 20.5-28.5% of Changjiagou soil, 7-11% of spodumene, 3-9% of calcined alum stone powder and 18-25% of waste earthenware pot powder.
6. The method for preparing a heat-resistant marmite using the waste marmite material as claimed in claim 1, wherein the method comprises the following steps: and 5, the ageing period is 3 to 7 days.
7. The method for preparing a heat-resistant marmite using the waste marmite material as claimed in claim 1, wherein the method comprises the following steps: the step 9 of preparing glaze and glazing specifically comprises the following steps: firstly, selecting the following raw materials in parts by weight: 20-40% of feldspar, 5-10% of quartz, 8-18% of limestone, 3-8% of kaolin, 8-13% of talc and 10-20% of spodumene; grinding, sieving with a 8-mesh sieve, filling into a wet ball mill, finely crushing until the fineness is 0.05 percent, sieving with a 150-mesh standard sieve, and controlling the water content to be 30-35 percent; after the ground glaze slip is screened by a standard sieve of 150 meshes, a high-strength iron remover is used for removing iron twice to prepare qualified glaze slip; and glazing by adopting a glaze spraying method to obtain a glazed product.
8. The method for preparing a heat-resistant marmite using the waste marmite material as claimed in claim 7, wherein the method comprises the following steps: the wet ball mill is used for fine crushing according to the following materials: ball stones: water =1:2.0:0.8 volume ratio.
9. The method for preparing a heat-resistant marmite using the waste marmite material as claimed in claim 1, wherein the method comprises the following steps: the firing curve in the step 10 is as follows: 60 minutes of seeds are burnt at 0-200 ℃, 60 minutes are burnt at 200-400 ℃, 90 minutes are burnt at 400-600 ℃, 75 minutes are burnt at 600-900 ℃, and 100 minutes are burnt at 900-1230 ℃.
10. The method of claim 9 for preparing a heat-resistant marmite using waste marmite material, wherein the method comprises the following steps: after the sintering is carried out according to the sintering curve, the temperature is preserved for 60 minutes for natural cooling or rapid cooling.
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