CN110001151B - Fireproof plate containing fluorite mine tailings and preparation method thereof - Google Patents

Fireproof plate containing fluorite mine tailings and preparation method thereof Download PDF

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CN110001151B
CN110001151B CN201910283759.8A CN201910283759A CN110001151B CN 110001151 B CN110001151 B CN 110001151B CN 201910283759 A CN201910283759 A CN 201910283759A CN 110001151 B CN110001151 B CN 110001151B
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fluorite
tailings
parts
mine tailings
fluorite mine
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CN110001151A (en
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林星泵
陈长盛
陈秀云
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Wuanzhou Arts And Crafts Vocational College
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Wuanzhou Arts And Crafts Vocational College
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
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    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L21/00—Compositions of unspecified rubbers
    • C08L21/02—Latex
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
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    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
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Abstract

The invention relates to a fire-resistant plate containing fluorite ore tailings and a preparation method thereof, wherein the fire-resistant plate containing fluorite ore tailings is prepared from synthetic latex, polytetrafluoroethylene, kaolin, expanded perlite, fluorite ore tailings and shell powder; according to the invention, in the preparation process of the refractory plate containing the fluorite ore tailings, the fluorite ore tailings are subjected to pretreatment and then mixed with other raw materials to be hot-pressed into the refractory plate, the raw materials are good in dispersibility and high in compatibility, and the finished product has good strength and impact resistance, especially good high-temperature stability and fire resistance, and is high in safety in use, long in service life and suitable for popularization.

Description

Fireproof plate containing fluorite mine tailings and preparation method thereof
Technical Field
The invention belongs to the technical field of refractory plates, and particularly relates to a refractory plate containing fluorite ore tailings and a preparation method thereof.
Background
With the improvement of living standard, the demand of consumers on the living environment generally becomes higher and higher, especially the living safety. Fire disasters are inevitable in daily life, and the harmfulness of the fire disasters is witnessed. At present, the fireproof plate used for building construction in China mainly adopts steel, wood, glass materials and the like, and has the problems of poor high-temperature stability, easy heat conduction, poor heat insulation, poor impact resistance, low strength, high cost and the like.
As is known, in the process of refining fluorite ore, a large amount of fluorite ore tailings are generated, which cause great pollution and damage to the environment, thus not only easily causing water pollution and occupying land, but also possibly damaging vegetation and even causing geological disasters. On the contrary, if the fluorite mine tailings are reasonably treated, the economic benefit maximization can be pursued, the resource recovery utilization rate can be effectively improved, and the ecological environment can be protected, so that how to apply the fluorite mine tailings to the preparation of the fireproof board material is very important to improve the performance of the fireproof board material.
Chinese patent CN103922691A discloses a slag magnesium fireproof board, belonging to the technical field of materials. The slag magnesium fireproof board is made with magnesium chloride and magnesium oxide as adhesive material, slag as main stuffing, mixture of kaolin, wollastonite and diatomite as auxiliary stuffing, organic and inorganic salt as modifying additive and mixture of sawdust and reinforcing fiber as reinforcing material, and through mixing, extrusion and compounding. The industrial slag is used as the filling material for the slag magnesium fireproof plate, so that the density of the plate is improved, the water content and the moisture absorption of the fireproof plate are effectively reduced, the compression resistance and the impact resistance of the fireproof plate are improved, and the rigidity and the flatness of the plate are improved; meanwhile, the cost can be effectively reduced, and the economic benefit is greatly improved, but the slag coal fireproof plate has general high-temperature stability and poor fireproof performance.
Chinese patent CN105777156B discloses a light fire-resistant heat-insulating vermiculite plate taking inorganic glue as a bonding agent and a manufacturing method thereof, belonging to the field of heat-insulating materials. The method comprises the steps of firstly, uniformly mixing phosphoric acid, aluminum hydroxide, aluminum powder, aluminum silicate and water according to a certain proportion, preparing inorganic adhesive under a heating condition, then adding bentonite into the inorganic adhesive, diluting with water, then mixing with expanded vermiculite according to a certain proportion, uniformly stirring, putting the mixture into a mold, and carrying out prepressing, hot press molding, demolding and trimming treatment to obtain the light insulation board. The prepared plate does not contain formaldehyde, VOC and other substances harmful to human bodies, overcomes the defects of poor fire resistance and flammability of organic fireproof plates, has the characteristics of light weight, good heat preservation and sound insulation performance, low cost, short production period and the like, and is suitable for heat preservation of non-bearing walls, roofs, inner and outer walls of industrial and civil buildings and sound insulation among floors, but the lightweight fireproof heat preservation vermiculite plate has general impact resistance and short service life.
Chinese patent CN101941801A discloses a microcrystalline glass plate and a production process thereof, which is characterized by comprising the following components in percentage by mass: wind-blown sand: 52-70, alkali: 10-15, limestone: 12-18, zinc powder: 3-5, titanium powder: 2-5, fluorite: 3-5. The invention provides a glass plate and a production process thereof, which take desert aeolian sand as a direct raw material to produce a building glass-ceramic plate and use industrial sand to achieve the purpose of industrial sand control, and provide a new mode for the control of desert by human beings, so that the desert aeolian sand is changed into the harmful and the waste is changed into the valuable.
Disclosure of Invention
The invention aims to provide a fireproof plate containing fluorite mine tailings, and solves the problems of poor high-temperature stability, general fireproof performance, low strength, poor impact resistance and higher cost of the conventional fireproof plate.
In order to solve the defects and find a better refractory plate containing fluorite mine tailings, the invention provides the following technical scheme:
a refractory plate containing fluorite ore tailings is prepared from synthetic latex, polytetrafluoroethylene, kaolin, expanded perlite, fluorite ore tailings and shell powder.
Furthermore, the refractory plate containing fluorite mine tailings comprises the following raw materials in parts by weight: 26-34 parts of synthetic latex, 3.5-6.5 parts of polytetrafluoroethylene, 4.2-5.6 parts of kaolin, 0.6-1.4 parts of expanded perlite, 8.4-9.2 parts of fluorite tailings and 2.2-3.2 parts of shell powder. Compared with inorganic glue, the synthetic latex has good adhesion and stability, and can keep the performance of the plate stable for a long time; the polytetrafluoroethylene has good high-temperature resistance, can enhance the high-temperature stability and strength of the high-temperature-resistant polytetrafluoroethylene, is assisted by kaolin to enhance the stability and impact resistance of the high-temperature-resistant polytetrafluoroethylene, and is firm and durable; the strength and the thermal stability of the invention are further improved by the expanded perlite and the shell powder, and the fireproof performance is improved; the fluorite mine tailings further improve the fire resistance and high-temperature stability of the invention, improve the strength and impact resistance and prolong the service life.
Further, the preparation process of the fluorite mine tailings comprises the following steps: discharging the fluorite mine tailings with the granularity of more than or equal to 0.08mm into a thickener for dehydration through a cyclone overflow at the flow speed of 3.5t/h to 5.5t/h under the condition that the inlet pressure of the cyclone is 0.06MPa to 0.09MPa, discharging the fluorite mine tailings with the granularity of less than 0.08mm into a dewatering screen for dehydration at the flow speed of 13.5t/h to 16.5t/h, mixing and stirring ore pulp flowing out of the thickener and tailings discharged by the dewatering screen for 15min to 30min, grinding for 6h to 8h at the temperature of 125 ℃ to 145 ℃, and sieving to obtain 60-100-mesh fluorite mine tailings.
In another aspect, the invention provides a method for preparing the above refractory plate containing fluorite mine tailings, which comprises the following steps:
s10, mixing the fluorite mine tailings with Ca (OH)2Soaking the obtained slag in the solution for 12-24 hours, then filtering, heating the obtained slag to 550-750 ℃, preserving heat for 3.5-4.5 hours, and grinding the slag to 80-140 meshes to obtain pretreated fluorite tailing powder for later use;
s20, crushing the expanded perlite in parts by weight to 60-80 μm, then mixing the crushed perlite with the shell powder in parts by weight, carrying out dry grinding for 8-12 h at the speed of 550-850 r/min, then adding the kaolin in parts by weight, continuing the dry grinding for 4-6 h, finally adding the polytetrafluoroethylene and the synthetic latex in parts by weight, stirring and mixing, adding the fluorite ore tailing powder pretreated in S10, carrying out hot press forming, and naturally cooling to obtain the fluorite ore tailing-containing refractory plate.
Further, in S10, Ca (OH)2Ca (OH) in solution2The mass percentage of the component (A) is 8.0% -8.5%.
Further, in S10, the temperature raising process specifically includes: firstly, heating to 180-220 ℃ at a rate of 1-3 ℃/min, and then heating to 550-750 ℃ at a rate of 5-10 ℃/min.
Further, in S20, the stirring is specifically: stirring at a speed of 300r/min to 400r/min for 5min to 15 min.
Further, in S20, the specific process of adding the pretreated fluorite ore tailing powder in S10 for hot press forming is as follows: before the fluorite tailing powder pretreated in the S10 is added, the mixed materials are divided into the following components in the mass ratio of 1: 2-3: a, B, C of component 1, wherein component A and component C are respectively added with fluorite mine tailing powder pretreated in S10 by weight of 1/2, the mixture is stirred for 10min to 18min at the speed of 300r/min to 400r/min, then component A is used as a surface layer, component B is used as a middle layer, component C is used as a bottom layer, and the components are sequentially stacked in a die and subjected to hot press molding. The layered structure can evacuate heat on the outer surface layer, does not gather, and meanwhile, fluorite ore tailings are added on the surface layer and the bottom layer, so that the fire resistance strength of the outer surface layer of the fire-resistant plate can be improved, and the service life of the fire-resistant plate is prolonged.
Further, in S20, the hot pressing specifically includes: firstly, prepressing at 150-170 ℃ for 3-5 min, then hot-pressing at 210-220 ℃ for 20-30 min, and finally cooling to 70-80 ℃ and maintaining the pressure for 4-8 min.
Further, in S20, the hot pressing pressure is 2.5MPa to 4.5 MPa.
According to the technical scheme, the invention has the following beneficial effects:
(1) according to the invention, in the preparation process of the refractory plate containing fluorite ore tailings, the fluorite ore tailings are subjected to pretreatment and then mixed with other raw materials to be hot-pressed into the refractory plate, the raw materials have good dispersibility and high compatibility, and the finished product has better strength and impact resistance, especially good high-temperature stability and fire resistance, and is high in safety in use, long in service life and suitable for popularization;
(2) the fluorite ore tailings are added into the refractory plate containing the fluorite ore tailings, so that the damage of the waste fluorite ore tailings to the environment and the ecology can be reduced, the resource waste can be reduced, the recovery utilization rate of the fluorite ore tailings is improved, the resource utilization maximization is realized, and the green ecological concept is met;
(3) the refractory plate containing fluorite ore tailings has the advantages of rich raw material sources, low price, simple preparation method, shorter production period, less cost investment and better economic benefit, and is suitable for wide popularization.
The present invention will be described in further detail with reference to the following embodiments.
Detailed Description
The invention is further illustrated by the following specific examples, which, however, are to be construed as merely illustrative, and not limitative of the remainder of the disclosure in any way whatsoever.
The present invention has been described generally and/or specifically with respect to materials used in testing and testing methods. Although many materials and methods of operation are known in the art for the purpose of carrying out the invention, the invention is nevertheless described herein in as detail as possible. It will be apparent to those skilled in the art that the materials and methods of operation used in the present invention are well known in the art, unless otherwise specified.
Example 1
Fireproof plate containing fluorite mine tailings
The refractory plate containing fluorite mine tailings comprises the following raw materials in parts by weight: 260kg of synthetic latex, 35 kg of polytetrafluoroethylene, 42 kg of kaolin, 6 kg of expanded perlite, 84 kg of fluorite mine tailings and 22 kg of shell powder; the preparation process of the fluorite mine tailings comprises the following steps: discharging fluorite mine tailings with the granularity of more than or equal to 0.08mm into a thickener through a cyclone overflow at the flow speed of 3.5t/h under the condition that the inlet pressure of the cyclone is 0.06MPa, discharging the fluorite mine tailings with the granularity of less than 0.08mm into a dewatering screen for dewatering at the flow speed of 13.5t/h, mixing and stirring ore pulp flowing out of the thickener and tailings discharged by the dewatering screen for 15min, then grinding for 6h at the temperature of 125 ℃, and sieving to obtain 60-mesh fluorite mine tailings.
The preparation method comprises the following steps:
s10, mixing the fluorite mine tailings with Ca (OH)2Soaking in the solution for 12h, filtering, heating the obtained slag to 180 deg.C at a rate of 1 deg.C/min, heating to 550 deg.C at a rate of 5 deg.C/min, maintaining the temperature for 3.5h, and grinding to 80 mesh to obtain pretreated fluorite ore tailing powder；
In the above step, Ca (OH)2Ca (OH) in solution2The mass percentage of (B) is 8.0%.
S20, crushing the expanded perlite in parts by weight to 60 mu m, then mixing the crushed perlite with the shell powder in parts by weight, carrying out dry grinding for 8h at the speed of 550r/min, then adding the kaolin in parts by weight, continuing the dry grinding for 4h, finally adding the polytetrafluoroethylene and synthetic latex in parts by weight, stirring at the speed of 300r/min for 5min, and dividing the mixed materials into materials with the mass ratio of 1: 2: a, B, C of component A and component C, respectively adding 1/2 mass of fluorite mine tailing powder pretreated in S10 into component A and component C, stirring at the speed of 300r/min for 10min again, then taking component A as a surface layer, taking component B as a middle layer and taking component C as a bottom layer, sequentially stacking in a die, performing hot press molding, and naturally cooling to obtain the fluorite mine tailing-containing refractory plate. .
In the above step, the hot pressing specifically comprises: firstly, prepressing at 150 ℃ for 3min, then hot-pressing at 210 ℃ for 20min, and finally cooling to 70 ℃ and maintaining the pressure for 4 min; the hot pressing pressure is 2.5 MPa.
Example 2
Fireproof plate containing fluorite mine tailings
The refractory plate containing fluorite mine tailings comprises the following raw materials in parts by weight: 340 kg of synthetic latex, 65 kg of polytetrafluoroethylene, 56 kg of kaolin, 14 kg of expanded perlite, 92 kg of fluorite mine tailings and 32 kg of shell powder; the preparation process of the fluorite mine tailings comprises the following steps: discharging fluorite mine tailings with the granularity of more than or equal to 0.08mm into a thickener through a cyclone overflow at the flow speed of 5.5t/h under the condition that the inlet pressure of the cyclone is 0.09MPa, discharging the fluorite mine tailings with the granularity of less than 0.08mm into a dewatering screen for dewatering at the flow speed of 16.5t/h, mixing and stirring ore pulp flowing out of the thickener and tailings discharged by the dewatering screen for 30min, then grinding for 8h at the temperature of 145 ℃, and sieving to obtain 100-mesh fluorite mine tailings.
The preparation method comprises the following steps:
s10, mixing the fluorite mine tailings with Ca (OH)2Soaking in the solution for 24h, filtering, and collecting the slag at a rate of 3 deg.C/minHeating to 220 ℃, heating to 750 ℃ at the speed of 10 ℃/min, preserving heat for 4.5 hours, and grinding to 140 meshes to obtain pretreated fluorite ore tailing powder for later use;
in the above step, Ca (OH)2Ca (OH) in solution2The mass percentage of (B) is 8.5%.
S20, crushing the expanded perlite in parts by weight to 80 μm, then mixing the crushed perlite with the shell powder in parts by weight, carrying out dry grinding for 12h at the speed of 850r/min, then adding the kaolin in parts by weight, continuing the dry grinding for 6h, finally adding the polytetrafluoroethylene and synthetic latex in parts by weight, stirring at the speed of 400r/min for 15min, and dividing the mixed materials into materials with the mass ratio of 1: 3: a, B, C of component A and component C, respectively adding 1/2 mass of fluorite mine tailing powder pretreated in S10 into component A and component C, stirring at the speed of 400r/min for 18min again, then taking component A as a surface layer, taking component B as a middle layer and taking component C as a bottom layer, sequentially stacking in a die, performing hot press molding, and naturally cooling to obtain the fluorite mine tailing-containing refractory plate.
In the above step, the hot pressing specifically comprises: firstly, prepressing at 170 ℃ for 5min, then hot-pressing at 220 ℃ for 30min, and finally cooling to 80 ℃ and maintaining the pressure for 8 min; the hot pressing pressure was 4.5 MPa.
Example 3
Fireproof plate containing fluorite mine tailings
The refractory plate containing fluorite mine tailings comprises the following raw materials in parts by weight: 282 kg of synthetic latex, 39 kg of polytetrafluoroethylene, 47 kg of kaolin, 7 kg of expanded perlite, 87 kg of fluorite mine tailings and 25 kg of shell powder; the preparation process of the fluorite mine tailings comprises the following steps: discharging fluorite mine tailings with the granularity of more than or equal to 0.08mm into a thickener through a cyclone overflow at the flow speed of 4.0t/h under the condition that the inlet pressure of the cyclone is 0.07MPa, discharging the fluorite mine tailings with the granularity of less than 0.08mm into a dewatering screen for dewatering at the flow speed of 14.0t/h, mixing and stirring ore pulp flowing out of the thickener and tailings discharged by the dewatering screen for 17min, then grinding for 6.5h under the condition that the temperature is 130 ℃, and sieving to obtain 70-mesh fluorite mine tailings.
The preparation method comprises the following steps:
s10, mixing the fluorite mine tailings with Ca (OH)2Soaking the obtained slag in the solution for 14h, then filtering, heating the obtained slag to 195 ℃ at the speed of 3 ℃/min, heating to 580 ℃ at the speed of 6 ℃/min, preserving heat for 3.8h, and grinding to 90 meshes to obtain pretreated fluorite ore tailing powder for later use;
in the above step, Ca (OH)2Ca (OH) in solution2The mass percentage of (B) is 8.1%.
S20, crushing the expanded perlite in parts by weight to 65 μm, then mixing the crushed perlite with the shell powder in parts by weight, dry-grinding the mixture for 9 hours at the speed of 600r/min, then adding the kaolin in parts by weight, continuously dry-grinding the mixture for 4.5 hours, finally adding the polytetrafluoroethylene and synthetic latex in parts by weight, stirring the mixture for 7 minutes at the speed of 320r/min, and dividing the mixture into materials with the mass ratio of 1: 2.2: a, B, C of component A and component C, respectively adding 1/2 mass of fluorite mine tailing powder pretreated in S10 into component A and component C, stirring at the speed of 320r/min for 12min again, then stacking component A as a surface layer, component B as a middle layer and component C as a bottom layer in a die in sequence, performing hot press molding, and naturally cooling to obtain the fluorite mine tailing-containing refractory plate.
In the above step, the hot pressing specifically comprises: firstly, prepressing at 155 ℃ for 5min, then hot-pressing at 212 ℃ for 22min, and finally cooling to 73 ℃ and maintaining the pressure for 5 min; the hot pressing pressure was 3.0 MPa.
Example 4
Fireproof plate containing fluorite mine tailings
The refractory plate containing fluorite mine tailings comprises the following raw materials in parts by weight: 320 kg of synthetic latex, 56 kg of polytetrafluoroethylene, 52 kg of kaolin, 12 kg of expanded perlite, 90 kg of fluorite mine tailings and 30 kg of shell powder; the preparation process of the fluorite mine tailings comprises the following steps: discharging fluorite mine tailings with the granularity of more than or equal to 0.08mm into a thickener through a cyclone overflow at the flow speed of 5.0t/h under the condition that the inlet pressure of the cyclone is 0.08MPa, discharging the fluorite mine tailings with the granularity of less than 0.08mm into a dewatering screen for dewatering at the flow speed of 15.5t/h, mixing and stirring ore pulp flowing out of the thickener and tailings discharged by the dewatering screen for 26min, then grinding for 7.5h at the temperature of 140 ℃, and sieving to obtain 90-mesh fluorite mine tailings.
The preparation method comprises the following steps:
s10, mixing the fluorite mine tailings with Ca (OH)2Soaking the obtained slag in the solution for 20h, then filtering, heating the obtained slag to 210 ℃ at the speed of 1 ℃/min, heating to 700 ℃ at the speed of 8 ℃/min, preserving heat for 4.2h, and grinding to 120 meshes to obtain pretreated fluorite ore tailing powder for later use;
in the above step, Ca (OH)2Ca (OH) in solution2The mass percentage of (B) is 8.4%.
S20, crushing the expanded perlite in parts by weight to 75 μm, then mixing the crushed perlite with the shell powder in parts by weight, dry-grinding the mixture for 11 hours at the speed of 750r/min, then adding the kaolin in parts by weight, continuing dry-grinding for 5.5 hours, finally adding the polytetrafluoroethylene and synthetic latex in parts by weight, stirring the mixture for 13 minutes at the speed of 380r/min, and dividing the mixture into materials with the mass ratio of 1: 2.8: a, B, C of component A and component C, respectively adding 1/2 mass of fluorite mine tailing powder pretreated in S10 into component A and component C, stirring at the speed of 380r/min for 16min again, then taking component A as a surface layer, taking component B as a middle layer and taking component C as a bottom layer, sequentially stacking in a die, performing hot press molding, and naturally cooling to obtain the fluorite mine tailing-containing refractory plate.
In the above step, the hot pressing specifically comprises: firstly, prepressing at 165 ℃ for 3min, then hot-pressing at 218 ℃ for 28min, and finally cooling to 78 ℃ and maintaining the pressure for 7 min; the hot pressing pressure was 4.0 MPa.
Example 5
Fireproof plate containing fluorite mine tailings
The refractory plate containing fluorite mine tailings comprises the following raw materials in parts by weight: 290 kg of synthetic latex, 51 kg of polytetrafluoroethylene, 52 kg of kaolin, 11 kg of expanded perlite, 89 kg of fluorite mine tailings and 28 kg of shell powder; the preparation process of the fluorite mine tailings comprises the following steps: discharging fluorite mine tailings with the granularity of more than or equal to 0.08mm into a thickener through a cyclone overflow at the flow speed of 4.5t/h under the condition that the inlet pressure of the cyclone is 0.08MPa, discharging the fluorite mine tailings with the granularity of less than 0.08mm into a dewatering screen for dewatering at the flow speed of 14.5t/h, mixing and stirring ore pulp flowing out of the thickener and tailings discharged by the dewatering screen for 22min, then grinding for 7h at the temperature of 135 ℃, and sieving to obtain 80-mesh fluorite mine tailings.
The preparation method comprises the following steps:
s10, mixing the fluorite mine tailings with Ca (OH)2Soaking the obtained slag in the solution for 16h, then filtering, heating the obtained slag to 204 ℃ at the speed of 2 ℃/min, heating to 650 ℃ at the speed of 7 ℃/min, preserving heat for 3.0h, and grinding to 100 meshes to obtain pretreated fluorite ore tailing powder for later use;
in the above step, Ca (OH)2Ca (OH) in solution2The mass percentage of (B) is 8.3%.
S20, crushing the expanded perlite in parts by weight to 70 mu m, then mixing the crushed perlite with the shell powder in parts by weight, dry-grinding the mixture for 10 hours at the speed of 700r/min, then adding the kaolin in parts by weight, continuously dry-grinding the mixture for 5 hours, finally adding the polytetrafluoroethylene and synthetic latex in parts by weight, stirring the mixture for 10 minutes at the speed of 360r/min, and dividing the mixture into materials with the mass ratio of 1: 2.5: a, B, C of component A and component C, respectively adding 1/2 mass of fluorite mine tailing powder pretreated in S10 into component A and component C, stirring for 14min at the speed of 360r/min, then taking component A as a surface layer, taking component B as a middle layer and taking component C as a bottom layer, sequentially stacking in a die, performing hot press molding, and naturally cooling to obtain the fluorite mine tailing-containing refractory plate.
In the above step, the hot pressing specifically comprises: firstly, prepressing at 160 ℃ for 4min, then hot-pressing at 215 ℃ for 25min, and finally cooling to 75 ℃ and maintaining the pressure for 6 min; the hot pressing pressure is 3.5 MPa.
Examples of the experiments
The basic performance test of the refractory plate containing fluorite mine tailings prepared in the embodiments 1 to 5 of the invention is performed, and the results are shown in table 1:
TABLE 1 statistics of performance of fluorite mine tailings-containing refractory panels prepared in inventive examples 1-5
Example 1 Example 2 Example 3 Example 4 Example 5
Flexural strength (MPa) 6.6 6.5 6.8 6.7 6.9
Impact strength (kJ/m)2） 5.6 5.9 5.8 5.7 5.5
Fire rating Class A Class A Class A Class A Class A
The results in table 1 show that the fireproof plate containing fluorite ore tailings prepared in embodiments 1 to 5 of the present invention has good flexural strength and impact strength, can be used in various environments, and has a fire resistance of class a, excellent fire resistance and high safety.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A refractory plate containing fluorite ore tailings is characterized in that the refractory plate containing fluorite ore tailings is prepared from synthetic latex, polytetrafluoroethylene, kaolin, expanded perlite, fluorite ore tailings and shell powder;
the refractory plate containing fluorite ore tailings comprises the following raw materials in parts by weight: 26 to 34 parts of synthetic latex, 3.5 to 6.5 parts of polytetrafluoroethylene, 4.2 to 5.6 parts of kaolin, 0.6 to 1.4 parts of expanded perlite, 8.4 to 9.2 parts of fluorite tailing and 2.2 to 3.2 parts of shell powder;
the preparation method of the refractory plate containing fluorite mine tailings comprises the following preparation steps:
s10, mixing the fluorite mine tailings with Ca (OH)2Soaking the solution for 12-24 h, then filtering, heating the obtained slag to 550-750 ℃, preserving heat for 3.5-4.5 h, and grinding the slag to 80-140 meshes to obtain pretreated fluorite tailing powder for later use;
s20, crushing the expanded perlite in parts by weight to 60-80 microns, mixing the crushed perlite with the shell powder in parts by weight, dry-grinding the mixture for 8-12 hours at the speed of 550-850 r/min, adding the kaolin in parts by weight, continuously dry-grinding the mixture for 4-6 hours, adding the polytetrafluoroethylene and the synthetic latex in parts by weight, stirring and mixing the mixture, adding the fluorite mine tailing powder pretreated in S10, hot-pressing the mixture, and naturally cooling the mixture to obtain the fireproof plate containing the fluorite mine tailing;
in S20, the hot press molding process of the fluorite ore tailing powder added with the pretreatment in S10 comprises the following specific steps: before the fluorite tailing powder pretreated in the S10 is added, the mixed materials are divided into the following components in the mass ratio of 1: 2-3: a, B, C of component 1, wherein component A and component C are respectively added with fluorite mine tailing powder pretreated in S10 with the mass of 1/2, the mixture is stirred for 10 to 18 minutes at the speed of 300 to 400r/min, then component A is used as a surface layer, component B is used as a middle layer, component C is used as a bottom layer, and the components are sequentially stacked in a die and subjected to hot press molding.
2. The refractory slab comprising fluorite mine tailings of claim 1, wherein the fluorite mine tailings are prepared by a process comprising: discharging the fluorite mine tailings with the granularity of more than or equal to 0.08mm into a thickener for dehydration through a cyclone overflow at the flow speed of 3.5t/h to 5.5t/h under the condition that the inlet pressure of the cyclone is 0.06MPa to 0.09MPa, discharging the fluorite mine tailings with the granularity of less than 0.08mm into a dewatering screen for dehydration at the flow speed of 13.5t/h to 16.5t/h, mixing and stirring ore pulp flowing out of the thickener and tailings discharged by the dewatering screen for 15min to 30min, grinding for 6h to 8h at the temperature of 125 ℃ to 145 ℃, and sieving to obtain 60-100-mesh fluorite mine tailings.
3. The refractory slab comprising fluorite mine tailings as set forth in claim 1, wherein in S10, the Ca (OH)2Ca (OH) in solution2The mass percentage of the component (A) is 8.0-8.5%.
4. The refractory slab comprising fluorite mine tailings as set forth in claim 1, wherein in S10, the temperature raising process comprises: firstly, the temperature is raised to 180-220 ℃ at the speed of 1-3 ℃/min, and then the temperature is raised to 550-750 ℃ at the speed of 5-10 ℃/min.
5. The refractory slab comprising fluorite mine tailings as recited in claim 1, wherein in S20, the agitating is specifically: stirring at the speed of 300 r/min-400 r/min for 5 min-15 min.
6. The refractory slab comprising fluorite mine tailings as recited in claim 1, wherein in S20, said hot pressing is specifically: firstly prepressing at 150-170 ℃ for 3-5 min, then hot-pressing at 210-220 ℃ for 20-30 min, and finally cooling to 70-80 ℃ and maintaining the pressure for 4-8 min.
7. The refractory slab comprising fluorite mine tailings as set forth in claim 1, wherein the hot pressing pressure is 2.5MPa to 4.5MPa in S20.
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