CN111978062A - Process method of inorganic nano silicon-based calcium silicate heat insulation product - Google Patents
Process method of inorganic nano silicon-based calcium silicate heat insulation product Download PDFInfo
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- CN111978062A CN111978062A CN202010882412.8A CN202010882412A CN111978062A CN 111978062 A CN111978062 A CN 111978062A CN 202010882412 A CN202010882412 A CN 202010882412A CN 111978062 A CN111978062 A CN 111978062A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
- B01F33/831—Devices with consecutive working receptacles, e.g. with two intermeshing tools in one of the receptacles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
- B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
- B01F33/83613—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by grinding or milling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
- B01F33/8362—Mixing plants; Combinations of mixers combining mixing with other treatments with chemical reactions
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00008—Obtaining or using nanotechnology related materials
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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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- 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
- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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Abstract
The invention discloses a process method of an inorganic nano silicon-based calcium silicate heat insulation product, which comprises the following steps: a. preparing before manufacturing; b. grinding and mixing; c. carrying out hydration reaction; d. and (5) molding. According to the invention, nano-silicon which is a nano-inorganic siliceous material is used as a reaction substrate and mixed with a calcareous raw material according to a certain proportion, aerogel with a certain proportion is properly added in the mixture as an additive, and hydration reaction is carried out at high temperature and high pressure, so that the calcium silicate heat-insulating product with low density, small heat conductivity coefficient, corrosion resistance, high strength and stable high temperature resistance is prepared, and the calcium silicate heat-insulating product can be stably used in heat-insulating network pipelines for a long time.
Description
Technical Field
The invention belongs to the technical field of calcium silicate heat-insulating materials, and particularly relates to a process method of an inorganic nano silicon-based calcium silicate heat-insulating product.
Background
The existing heat hope heat insulation products are usually fiber materials such as rock wool, aluminum silicate and the like, and the loss of heat is blocked through a large number of gaps between fibers, so that the energy consumption is reduced.
In actual use, most heat supply network heat insulation products have the problems of easy damage, short service life and poor heat insulation effect, so that the heat insulation effect of the heat supply network is seriously reduced, and the economical efficiency of the whole heat supply network operation is influenced by the pipe loss and the increase of the temperature drop per kilometer.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a process method of an inorganic nano silicon-based calcium silicate heat insulation product, which adopts nano inorganic siliceous material nano silicon as a reaction substrate to be mixed with calcareous raw materials according to a certain proportion to replace the original siliceous raw materials with low purity and poor activity, such as diatomite, bentonite, quartz sand and the like, the calcareous raw materials adopt quicklime, a certain proportion of aerogel is properly added in the mixture to be used as an additive to carry out hydration reaction under high temperature and high pressure, so that the calcium silicate heat insulation product with low density, small heat conductivity coefficient, corrosion resistance, high strength and stable high temperature resistance is prepared, can be stably used in heat insulation of heat network pipelines for a long time, and the nano silicon has the characteristics of high purity, small particle size and uniform distribution, has the characteristics of large surface area, high surface activity and low apparent density, the low-density characteristic of the nano-silicon enables the prepared calcium silicate heat-insulating product to have the characteristic of low density, and the high-surface-activity characteristic of the nano-silicon accelerates the preparation efficiency of the calcium silicate heat-insulating product.
In order to solve the technical problems, the invention adopts the following technical scheme:
a process method of an inorganic nano silicon-based calcium silicate heat insulation product is characterized by comprising the following steps:
a. preparation before manufacture
Firstly, preparing nano silicon of a nano inorganic siliceous material used as a reaction base material, wherein a calcareous raw material adopts quicklime, and an additive adopts aerogel;
b. grinding and mixing
1) Grinding: weighing nano silicon, quicklime and aerogel according to the calculated mass, simultaneously putting the nano silicon, the quicklime and the aerogel into a grinding device positioned on one side of a processing table, and respectively and simultaneously grinding and crushing the nano silicon, the quicklime and the aerogel by the grinding device so as to generate nano silicon powder, quicklime powder and aerogel powder;
2) mixing: after reaching a certain fineness, the nano silicon powder, the quicklime powder and the aerogel powder automatically fall into a conveying channel from a grinding device, and the conveying channel automatically conveys the nano silicon powder, the quicklime powder and the aerogel powder to a mixing cavity embedded in a processing table for mixing;
c. hydration reaction
1) Stirring: weighing water according to the calculated mass, adding the water into a mixing cavity, simultaneously stirring through a stirring assembly positioned at the other end of a processing table in the process of pouring the water again to ensure that the nano silicon powder, the quicklime powder and the aerogel powder are fully mixed in the water, stopping the stirring assembly, and standing the stirred raw materials in the mixing cavity for 2-3 hours to ensure that the nano silicon, the quicklime powder and the aerogel generate certain pre-reaction;
2) preparation: taking out the mixing cavity embedded in the processing table from the processing table, directly placing the raw materials in the mixing cavity into a closed reaction device, and heating and pressurizing for a certain time to generate a synthetic product;
d. shaping of
And carrying out filter pressing, dehydration, molding, demolding and drying treatment on the obtained synthetic product to obtain the calcium silicate heat insulation product.
Further, the activity degree of the quicklime in the step a is more than or equal to 400. The high-activity quicklime is adopted, so that the hydration reaction time of the nano silicon and the quicklime is shortened, and the preparation efficiency of the calcium silicate heat-insulating product is greatly improved.
And furthermore, the mass parts of the nano silicon, the quicklime and the aerogel in the step b are 95-105 parts of the nano silicon, 88-98 parts of the quicklime and 35-40 parts of the aerogel.
Further, the mass of water in step c is half of the total weight.
Further, the water in step c does not contain chloride ions. Avoiding toxic substances in water and improving the safety performance of the calcium silicate heat-insulating product.
Further, the closed reaction device in the step c is a reaction kettle, the heating temperature is 200-250 ℃, the heating rate is 15.0-30.0 ℃/min, the pressure is 2.0-3.0 Mpa, and the reaction time is 4-6 h.
Further, the grinding device in the step b is specifically configured as follows: the grinding device comprises a fixed frame, a lifting rod, a swing motor, a swing arm, a grinding tank and a grinding head, wherein the fixed frame is fixedly connected to one side of a processing table, a partition plate is arranged in the middle of the fixed frame, the bottom of the lifting rod penetrates through the partition plate, an adjusting disc is fixedly connected to the bottom of the lifting rod, three connecting rods are fixedly connected to the bottom of the adjusting disc, the grinding head is rotatably connected to the bottoms of the connecting rods, a guide column protruding upwards is arranged in the center of the grinding tank, the grinding head is sleeved outside the guide column, the side wall of the grinding tank is fixedly connected with the fixed frame, the three grinding tanks are fixedly connected, the swing motor is fixedly connected to one side of the fixed frame, the swing motor is arranged above the partition plate, one end of the swing arm is rotatably connected with the swing motor, a rotating rod is fixedly connected, and a conveying channel is fixedly connected between the bottoms of the fixing frames, is positioned at the bottom of the grinding tank, and inclines to one side of the mixing cavity. Swing motor control pendulum wall rotates, thereby control the lifter to carry out elevating movement, the lifter drives the adjustment disk and carries out elevating movement, the adjustment disk drives the grinding head through the connecting rod and goes up and down along the direction of guide post, thereby to being located the nanometer silicon in the grinding jar, quick lime grinds with the aerogel, because the grinding head rotates the bottom of connecting at the connecting rod, make the grinding head can also rotate when going up and down in the grinding jar, thereby the speed of grinding has been accelerated, transfer passage's slope sets up, nanometer silicon powder has been realized, quick lime powder and aerogel powder's automatic transport.
Further, the bottom of grinding tank is equipped with the filter, and the filter adopts 300 ~ 400 meshes sieve. The setting of filter is used for controlling the fineness that nanometer silicon, quick lime and aerogel ground into the powder, simultaneously when nanometer silicon, quick lime and aerogel grind respectively and reach certain fineness after the powder, falls into the transfer passage in from the filter automatically.
Further, the stirring assembly body in the step c is provided with: the stirring assembly is provided with a lifting piece and a stirring frame, the lifting piece is fixedly connected to the other side of the processing table, the mixing cavity is arranged between the lifting piece and the fixing frame, one side of the lifting piece, which is close to the mixing cavity, is fixedly connected with the stirring frame, one side of the stirring frame, which is close to the mixing cavity, is provided with a rotating piece and a stirring rod, the rotating piece is positioned on one side of the stirring rod, the rotating piece comprises a rotating motor, a motor base, a driving wheel and a guide wheel, the motor base is fixedly connected to the bottom of the stirring frame, the rotating motor is fixedly connected to the upper side of the motor base, the top of the rotating motor is rotatably connected with a long rod rotating shaft, the two ends of the long rod rotating shaft are connected with the driving wheel and the guide wheel, the driving wheel is positioned above the guide wheel, top fixed connection of abnormal shape connecting rod and stirring rod, the stirring rod is the slope form, one side fixedly connected with spacing ring of agitator, the stirring rod passes the spacing ring, stirring rod fixedly connected with driven gear, leading wheel and driven gear engagement, stirring rod fixedly connected with guide block, the guide block is located driven gear's below, one side fixedly connected with guide ring of agitator, the guide ring is located the below of spacing ring, guide ring and guide block phase-match, the bottom fixedly connected with stirring head of stirring rod, the stirring head is located the mixing chamber, it rotates with the action wheel to rotate motor control leading wheel, thereby drive from the driving wheel rotation, it rotates at the mixing chamber to make from the driving rod head. When nanometer silicon powder, quick lime powder and aerogel powder enter into the hybrid chamber after, add water again, then rotate the motor operation, it rotates to rotate motor control stock pivot, thereby drive the action wheel and rotate with the leading wheel, the action wheel passes through the belt and drives to rotate from the driving wheel, it sets up the stirring rod and rotates at the rotation of hybrid chamber to drive the slope from the driving wheel, thereby stir the reactant of hybrid chamber through the agitator head, because nanometer silicon powder, quick lime powder and aerogel powder are the continuation and add to the hybrid chamber in, thereby lead to nanometer silicon powder, quick lime powder is different with the degree of depth of aerogel powder in aqueous, go up and down through lifter control stirring frame, make the different height of stirring rod head at the hybrid chamber stir, thereby guaranteed the stirring of reactant, the product quality of calcium silicate heat insulation goods has been increased.
Further, the lifting part comprises a lifting frame, a lifting platform, a driving shaft and a driven shaft, the lifting platform is fixedly connected with the other side of the stirring frame, adjusting grooves are formed in two sides of the lifting frame, inserting blocks are arranged at the bottom of the lifting platform and movably connected in the adjusting grooves, the lifting frame is rotatably connected with the driving shaft, the driving shaft is positioned below the adjusting grooves, a first eccentric gear is fixedly connected to the middle of the driving shaft, first guide wheels are arranged at two ends of the driving shaft, the driven shaft is rotatably connected between the bottoms of the two inserting blocks, a second eccentric gear is arranged at the middle of the driven shaft corresponding to the first eccentric gear and is meshed with the first eccentric gear, second guide wheels are correspondingly arranged at two ends of the driven shaft, the first guide wheels are matched with the second guide wheels, the driven shaft is controlled to rotate by rotation of the driving shaft, so that the lifting platform is controlled to lift, and the, so that the stirring head can be lifted in the mixing cavity. The driving shaft drives the first eccentric gear to rotate, the first eccentric gear controls the second eccentric gear to rotate, so that the driven shaft is controlled to rotate, the first eccentric gear and the second eccentric gear are arranged to realize the up-and-down lifting function of the lifting table, and when the lifting table is lowered to the lowest position, the first guide wheel and the second guide wheel are abutted against each other.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the invention adopts nano-grade inorganic siliceous material nano-silicon as a reaction substrate to be mixed and proportioned with calcareous raw materials according to a certain proportion to replace the original siliceous raw materials with low purity and poor activity, such as diatomite, bentonite, quartz sand and the like, the calcareous raw materials adopt quicklime, aerogel with a certain proportion is properly added in the mixture as an additive, the method has the advantages that hydration reaction is carried out at high temperature and high pressure, so that the calcium silicate heat-insulating product with low density, small heat conductivity coefficient, corrosion resistance, high strength and stable high-temperature resistance is prepared, the requirement of stable use in heat-insulating network pipelines for a long time can be met, the nano-silicon has the characteristics of high purity, small particle size and uniform distribution, and has the characteristics of large surface area, high surface activity and low apparent density, the prepared calcium silicate heat-insulating product has the characteristic of low density due to the low density of the nano-silicon, and the preparation efficiency of the calcium silicate heat-insulating product is accelerated due to the high surface activity of the nano-silicon.
The grinding device in the step b is specifically set as follows: the grinding device comprises a fixed frame, a lifting rod, a swing motor, a swing arm, a grinding tank and a grinding head, wherein the fixed frame is fixedly connected to one side of a processing table, a partition plate is arranged in the middle of the fixed frame, the bottom of the lifting rod penetrates through the partition plate, an adjusting disc is fixedly connected to the bottom of the lifting rod, three connecting rods are fixedly connected to the bottom of the adjusting disc, the grinding head is rotatably connected to the bottoms of the connecting rods, a guide column protruding upwards is arranged in the center of the grinding tank, the grinding head is sleeved outside the guide column, the side wall of the grinding tank is fixedly connected with the fixed frame, the three grinding tanks are fixedly connected, the swing motor is fixedly connected to one side of the fixed frame, the swing motor is arranged above the partition plate, one end of the swing arm is rotatably connected with the swing motor, a rotating rod is fixedly connected, and a conveying channel is fixedly connected between the bottoms of the fixing frames, is positioned at the bottom of the grinding tank, and inclines to one side of the mixing cavity. Swing motor control pendulum wall rotates, thereby control the lifter to carry out elevating movement, the lifter drives the adjustment disk and carries out elevating movement, the adjustment disk drives the grinding head through the connecting rod and goes up and down along the direction of guide post, thereby to being located the nanometer silicon in the grinding jar, quick lime grinds with the aerogel, because the grinding head rotates the bottom of connecting at the connecting rod, make the grinding head can also rotate when going up and down in the grinding jar, thereby the speed of grinding has been accelerated, transfer passage's slope sets up, nanometer silicon powder has been realized, quick lime powder and aerogel powder's automatic transport.
The stirring assembly body in the step c is provided with the following components: the stirring assembly is provided with a lifting piece and a stirring frame, the lifting piece is fixedly connected to the other side of the processing table, the mixing cavity is arranged between the lifting piece and the fixing frame, one side of the lifting piece, which is close to the mixing cavity, is fixedly connected with the stirring frame, one side of the stirring frame, which is close to the mixing cavity, is provided with a rotating piece and a stirring rod, the rotating piece is positioned on one side of the stirring rod, the rotating piece comprises a rotating motor, a motor base, a driving wheel and a guide wheel, the motor base is fixedly connected to the bottom of the stirring frame, the rotating motor is fixedly connected to the upper side of the motor base, the top of the rotating motor is rotatably connected with a long rod rotating shaft, the two ends of the long rod rotating shaft are connected with the driving wheel and the guide wheel, the driving wheel is positioned above the guide wheel, top fixed connection of abnormal shape connecting rod and stirring rod, the stirring rod is the slope form, one side fixedly connected with spacing ring of agitator, the stirring rod passes the spacing ring, stirring rod fixedly connected with driven gear, leading wheel and driven gear engagement, stirring rod fixedly connected with guide block, the guide block is located driven gear's below, one side fixedly connected with guide ring of agitator, the guide ring is located the below of spacing ring, guide ring and guide block phase-match, the bottom fixedly connected with stirring head of stirring rod, the stirring head is located the mixing chamber, it rotates with the action wheel to rotate motor control leading wheel, thereby drive from the driving wheel rotation, it rotates at the mixing chamber to make from the driving rod head. When nanometer silicon powder, quick lime powder and aerogel powder enter into the hybrid chamber after, add water again, then rotate the motor operation, it rotates to rotate motor control stock pivot, thereby drive the action wheel and rotate with the leading wheel, the action wheel passes through the belt and drives to rotate from the driving wheel, it sets up the stirring rod and rotates at the rotation of hybrid chamber to drive the slope from the driving wheel, thereby stir the reactant of hybrid chamber through the agitator head, because nanometer silicon powder, quick lime powder and aerogel powder are the continuation and add to the hybrid chamber in, thereby lead to nanometer silicon powder, quick lime powder is different with the degree of depth of aerogel powder in aqueous, go up and down through lifter control stirring frame, make the different height of stirring rod head at the hybrid chamber stir, thereby guaranteed the stirring of reactant, the product quality of calcium silicate heat insulation goods has been increased.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of the connection between the processing table, the grinding device and the stirring assembly according to the present invention;
FIG. 2 is a schematic view of the polishing head of the present invention with the lifting rod controlling the lowering of the polishing head;
FIG. 3 is a schematic view of the milling jar of the present invention;
FIG. 4 is an exploded view of the adjustment dial and grinding bit attachment of the present invention;
FIG. 5 is a schematic view of the construction of the lift member of the present invention;
FIG. 6 is a schematic structural view of the lifter of the present invention when the lifter is raised to the highest position;
FIG. 7 is a schematic view showing the structure of the rotor connected to the stirring rod according to the present invention.
In the figure, 1-the processing station; 2-a grinding device; 3-a conveying channel; 4-a mixing chamber; 5-a fixing frame; 6-lifting rod; 7-a swing motor; 8-swing arm; 9-grinding tank; 10-a grinding head; 11-a separator; 12-a regulating disk; 13-a connecting rod; 14-a guide post; 15-rotating rods; 16-a limiting block; 17-a filter plate; 18-a lifter; 19-a stirring frame; 20-a rotating member; 21-a stirring rod; 22-a rotating motor; 23-a driving wheel; 24-a guide wheel; 25-long rod rotating shaft; 26-a fixed seat; 27-a driven wheel; 28-a belt; 29-a special-shaped connecting rod; 30-a stop collar; 31-a driven gear; 32-a guide block; 33-a guide ring; 34-a stirring head; 35-a lifting frame; 36-a lifting platform; 37-drive shaft; 38-a driven shaft; 39-an adjustment tank; 40-inserting blocks; 41-a first eccentric gear; 42-a first guide wheel; 43-a second eccentric gear; 44-a second guide wheel; 45-stirring assembly.
Detailed Description
As shown in fig. 1 to 7, the process of the inorganic nano-calcium silicate based heat insulation product of the present invention comprises the following steps:
a. preparation before manufacture
Firstly, preparing nano silicon which is used as a nano inorganic siliceous material for a reaction substrate, wherein a calcareous raw material adopts quicklime, and an additive adopts aerogel.
b. Grinding and mixing
1) Grinding: nanometer silicon, quicklime and aerogel are weighed according to the calculated mass, then the nanometer silicon, the quicklime and the aerogel are simultaneously put into a grinding device on one side of a processing table 1, and the grinding device respectively and simultaneously grinds and crushes the nanometer silicon, the quicklime and the aerogel, so that nanometer silicon powder, quicklime powder and aerogel powder are generated.
2) Mixing: the nano silicon powder, the quicklime powder and the aerogel powder automatically fall into the conveying channel 3 from the grinding device 2 after reaching a certain fineness, and the conveying channel 3 automatically conveys the nano silicon powder, the quicklime powder and the aerogel powder to the mixing cavity 4 embedded in the processing table 1 for mixing.
c. Hydration reaction
1) Stirring: weigh water according to the good quality of calculation, add water into the hybrid chamber 4 after that, the in-process of pouring water again simultaneously stirs through the stirring subassembly 45 that is located the processing platform 1 other end for nanometer silicon powder, quick lime powder and aerogel powder are at aquatic intensive mixing, stirring subassembly 45 stop work, and the raw materials that will stir are stood 2 ~ 3 hours in hybrid chamber 4, make nanometer silicon, quick lime powder and aerogel produce certain pre-reaction.
2) Preparation: taking out the mixing cavity 4 embedded in the processing table 1 from the processing table 1, then directly putting the raw materials in the mixing cavity 4 into a closed reaction device, and heating and pressurizing for a certain period of time to generate a synthetic product.
d. Shaping of
And carrying out filter pressing, dehydration, molding, demolding and drying treatment on the obtained synthetic product to obtain the calcium silicate heat insulation product.
The activity degree of the quicklime in the step a is more than or equal to 400. The high-activity quicklime is adopted, so that the hydration reaction time of the nano silicon and the quicklime is shortened, and the preparation efficiency of the calcium silicate heat-insulating product is greatly improved.
And (b) the mass parts of the nano silicon, the quicklime and the aerogel in the step b are 95-105 parts of the nano silicon, 88-98 parts of the quicklime and 35-40 parts of the aerogel.
The mass of the water in the step c accounts for half of the total weight.
The water in step c does not contain chloride ions. Avoiding toxic substances in water and improving the safety performance of the calcium silicate heat-insulating product.
The closed reaction device in the step c is a reaction kettle, the heating temperature is 200-250 ℃, the heating rate is 15.0-30.0 ℃/min, the pressure is 2.0-3.0 Mpa, and the reaction time is 4-6 h.
The grinding device 2 in the step b is specifically configured as follows: the grinding device 2 comprises a fixed frame 5, a lifting rod 6, a swing motor 7, a swing arm 8, a grinding tank 9 and a grinding head 10, the fixed frame 5 is fixedly connected to one side of the processing table 1, a partition plate 11 is arranged in the middle of the fixed frame 5, the bottom of the lifting rod 6 penetrates through the partition plate 11, the bottom of the lifting rod 6 is fixedly connected with an adjusting disc 12, the bottom of the adjusting disc 12 is fixedly connected with three connecting rods 13, the grinding head 10 is rotatably connected to the bottom of the connecting rods 13, a guide column 14 protruding upwards is arranged in the center of the grinding tank 9, the grinding head 10 is sleeved on the outer side of the guide column 14, the side wall of the grinding tank 9 is fixedly connected with the fixed frame 5, the three grinding tanks 9 are fixedly connected, the swing motor 7 is fixedly connected to one side of the fixed frame 5, the swing motor 7 is positioned above the partition plate 11, one end, the other end of swing arm 8 rotates with dwang 15 to be connected, and lifter 6 is equipped with stopper 16, and stopper 16 is located the upper and lower both ends of dwang 15, fixedly connected with transfer passage 3 between the bottom of mount 5, and transfer passage 3 is located the bottom of grinding tank 9, and transfer passage 3 inclines to mixing chamber 4 one side. Swing motor 7 control pendulum wall rotates, thereby control lifter 6 carries out elevating movement, lifter 6 drives adjustment disk 12 and carries out elevating movement, adjustment disk 12 drives grinding head 10 through connecting rod 13 and goes up and down along the direction of guide post 14, thereby to being located the nanometer silicon in grinding jar 9, quick lime grinds with the aerogel, because grinding head 10 rotates the bottom of connecting rod 13 connection, make grinding head 10 can also rotate when going up and down in grinding jar 9, thereby the speed of grinding has been accelerated, transfer passage 3's slope sets up, nanometer silicon powder has been realized, quick lime powder and aerogel powder's automatic transport.
The bottom of jar 9 is ground is equipped with filter 17, and filter 17 adopts 300 ~ 400 meshes sieve. The setting of filter 17 is used for controlling the fineness that nanometer silicon, quick lime and aerogel ground into powder, simultaneously when nanometer silicon, quick lime and aerogel grind respectively and reach certain fineness after into the powder, falls into conveying channel 3 from filter 17 in automatically.
The stirring assembly 45 in step c is configured as follows: the stirring component 45 is provided with a lifting piece 18 and a stirring frame 19, the lifting piece 18 is fixedly connected to the other side of the processing table 1, the mixing chamber 4 is arranged between the lifting piece 18 and the fixing frame 5, one side of the lifting piece 18 close to the mixing chamber 4 is fixedly connected with the stirring frame 19, one side of the stirring frame 19 close to the mixing chamber 4 is provided with a rotating piece 20 and a stirring rod 21, the rotating piece 20 is positioned on one side of the stirring rod 21, the rotating piece 20 comprises a rotating motor 22, a motor base, a driving wheel 23 and a guide gear 24, the motor base is fixedly connected to the bottom of the stirring frame 19, the rotating motor 22 is fixedly connected above the motor base, the top of the rotating motor 22 is rotatably connected with a long rod rotating shaft 25, two ends of the long rod rotating shaft 25 are connected with the driving wheel 23 and the guide gear 24, the driving wheel 23 is positioned above the guide gear 24, a belt 28 is rotatably connected between the driven wheel 27 and the driving wheel 23, a special-shaped connecting rod 29 is fixedly connected to the bottom of the driven wheel 27, the special-shaped connecting rod 29 is fixedly connected to the top of the stirring rod 21, the stirring rod 21 is inclined, a limiting ring 30 is fixedly connected to one side of the stirring frame 19, the stirring rod 21 passes through the limiting ring 30, a driven gear 31 is fixedly connected to the stirring rod 21, the guide gear 24 is meshed with the driven gear 31, a guide block 32 is fixedly connected to the stirring rod 21, the guide block 32 is positioned below the driven gear 31, a guide ring 33 is fixedly connected to one side of the stirring frame 19, the guide ring 33 is positioned below the limiting ring 30, the guide ring 33 is matched with the guide block 32, a stirring head 34 is fixedly connected to the bottom of the stirring rod 21, the stirring head 34 is positioned in the mixing cavity 4, the rotating motor 22 controls the guide gear 24 and the driving wheel 23 to rotate, so, so that the mixing rod head rotates in the mixing chamber 4. When nanometer silicon powder, quick lime powder enters into the hybrid chamber 4 with the aerogel powder after, add water again, then rotate motor 22 operation, it rotates to rotate motor 22 control stock pivot 25, thereby drive action wheel 23 and guide gear 24 and rotate, action wheel 23 drives through belt 28 and rotates from driving wheel 27, it sets up the stirring rod 21 in the rotation of hybrid chamber 4 to drive slope from driving wheel 27, thereby stir the reactant in hybrid chamber 4 through stirring head 34, because nanometer silicon powder, quick lime powder and aerogel powder are add into hybrid chamber 4 in succession, thereby lead to nanometer silicon powder, quick lime powder is different with the degree of depth of aerogel powder in the aquatic, go up and down through lift 18 control agitator bracket 19, make the stirring rod head stir at the different height of hybrid chamber 4, thereby guaranteed the stirring of reactant, the product quality of the calcium silicate heat-insulating product is improved.
The lifting part 18 comprises a lifting frame 35 and a lifting platform 36, a driving shaft 37 and a driven shaft 38, the lifting platform 36 is fixedly connected with the other side of the stirring frame 19, adjusting grooves 39 are formed in two sides of the lifting frame 35, inserting blocks 40 are arranged at the bottom of the lifting platform 36, the inserting blocks 40 are movably connected in the adjusting grooves 39, the lifting frame 35 is rotatably connected with the driving shaft 37, the driving shaft 37 is positioned below the adjusting grooves 39, a first eccentric gear 41 is fixedly connected to the middle of the driving shaft 37, first guide wheels 42 are arranged at two ends of the driving shaft 37, the driven shaft 38 is rotatably connected between the bottoms of the two inserting blocks 40, a second eccentric gear 43 is arranged at the middle of the driven shaft 38 corresponding to the first eccentric gear 41, the first eccentric gear 41 is meshed with the second eccentric gear 43, second guide wheels 44 are correspondingly arranged at two ends of the driven shaft 38, the first guide wheels 42 are matched with the second guide wheels 44, and the driven shaft 37, thereby controlling the lifting platform 36 to lift, the lifting platform 36 drives the stirring frame 19 to lift, and the stirring head 34 lifts in the mixing chamber 4. The driving shaft 37 drives the first eccentric gear 41 to rotate, the first eccentric gear 41 controls the second eccentric gear 43 to rotate, so as to control the driven shaft 38 to rotate, the arrangement of the first eccentric gear 41 and the second eccentric gear 43 realizes the up-and-down lifting function of the lifting table 36, and when the lifting table 36 is lowered to the lowest position, the first guide wheel 42 and the second guide wheel 44 are mutually abutted.
The invention adopts nano-grade inorganic siliceous material nano-silicon as a reaction substrate to be mixed and proportioned with calcareous raw materials according to a certain proportion to replace the original siliceous raw materials with low purity and poor activity, such as diatomite, bentonite, quartz sand and the like, the calcareous raw materials adopt quicklime, aerogel with a certain proportion is properly added in the mixture as an additive, the method has the advantages that hydration reaction is carried out at high temperature and high pressure, so that the calcium silicate heat-insulating product with low density, small heat conductivity coefficient, corrosion resistance, high strength and stable high-temperature resistance is prepared, the requirement of stable use in heat-insulating network pipelines for a long time can be met, the nano-silicon has the characteristics of high purity, small particle size and uniform distribution, and has the characteristics of large surface area, high surface activity and low apparent density, the prepared calcium silicate heat-insulating product has the characteristic of low density due to the low density of the nano-silicon, and the preparation efficiency of the calcium silicate heat-insulating product is accelerated due to the high surface activity of the nano-silicon.
The above is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions or modifications made based on the present invention to solve the same technical problems and achieve the same technical effects are within the scope of the present invention.
Claims (10)
1. A process method of an inorganic nano silicon-based calcium silicate heat insulation product is characterized by comprising the following steps:
a. preparation before manufacture
Firstly, preparing nano silicon of a nano inorganic siliceous material used as a reaction base material, wherein a calcareous raw material adopts quicklime, and an additive adopts aerogel;
b. grinding and mixing
1) Grinding: weighing nano silicon, quicklime and aerogel according to the calculated mass, simultaneously putting the nano silicon, the quicklime and the aerogel into a grinding device positioned on one side of a processing table, and respectively and simultaneously grinding and crushing the nano silicon, the quicklime and the aerogel by the grinding device so as to generate nano silicon powder, quicklime powder and aerogel powder;
2) mixing: after reaching a certain fineness, the nano silicon powder, the quicklime powder and the aerogel powder automatically fall into a conveying channel from a grinding device, and the conveying channel automatically conveys the nano silicon powder, the quicklime powder and the aerogel powder to a mixing cavity embedded in a processing table for mixing;
c. hydration reaction
1) Stirring: weighing water according to the calculated mass, adding the water into a mixing cavity, simultaneously stirring through a stirring assembly positioned at the other end of a processing table in the process of pouring the water again to ensure that the nano silicon powder, the quicklime powder and the aerogel powder are fully mixed in the water, stopping the stirring assembly, and standing the stirred raw materials in the mixing cavity for 2-3 hours to ensure that the nano silicon, the quicklime powder and the aerogel generate certain pre-reaction;
2) preparation: taking out the mixing cavity embedded in the processing table from the processing table, directly placing the raw materials in the mixing cavity into a closed reaction device, and heating and pressurizing for a certain time to generate a synthetic product;
d. shaping of
And carrying out filter pressing, dehydration, molding, demolding and drying treatment on the obtained synthetic product to obtain the calcium silicate heat insulation product.
2. The process of claim 1, wherein the inorganic nano-calcium silicate-based thermal insulation product comprises: the activity degree of the quicklime in the step a is more than or equal to 400.
3. The process of claim 1, wherein the inorganic nano-calcium silicate-based thermal insulation product comprises: in the step b, the mass parts of the nano silicon, the quicklime and the aerogel are 95-105 parts of the nano silicon, 88-98 parts of the quicklime and 35-40 parts of the aerogel.
4. The process of claim 1, wherein the inorganic nano-calcium silicate-based thermal insulation product comprises: the mass of the water in the step c accounts for half of the total weight.
5. The process of claim 1, wherein the inorganic nano-calcium silicate-based thermal insulation product comprises: said water in step c is free of chloride ions.
6. The process of claim 1, wherein the inorganic nano-calcium silicate-based thermal insulation product comprises: the closed reaction device in the step c is a reaction kettle, the heating temperature is 200-250 ℃, the heating rate is 15.0-30.0 ℃/min, the pressure is 2.0-3.0 Mpa, and the reaction time is 4-6 h.
7. The process of claim 1, wherein the inorganic nano-calcium silicate-based thermal insulation product comprises: the grinding device in the step b is specifically set as follows: the grinding device comprises a fixed frame, a lifting rod, a swing motor, a swing arm, a grinding tank and a grinding head, wherein the fixed frame is fixedly connected to one side of a processing table, a partition plate is arranged in the middle of the fixed frame, the bottom of the lifting rod penetrates through the partition plate, an adjusting disc is fixedly connected to the bottom of the lifting rod, three connecting rods are fixedly connected to the bottom of the adjusting disc, the grinding head is rotatably connected to the bottoms of the connecting rods, an upward-protruding guide post is arranged in the center of the grinding tank, the grinding head is sleeved outside the guide post, the side wall of the grinding tank is fixedly connected with the fixed frame, the three grinding tanks are fixedly connected, the swing motor is fixedly connected to one side of the fixed frame, the swing motor is arranged above the partition plate, one end of the swing arm is rotatably connected with the swing motor, a rotating rod is fixedly connected, and a conveying channel is fixedly connected between the bottoms of the fixing frames, is positioned at the bottom of the grinding tank, and inclines to one side of the mixing cavity.
8. The process of claim 7, wherein the inorganic nano-calcium silicate-based thermal insulation product comprises: the bottom of grinding tank is equipped with the filter, the filter adopts 300 ~ 400 meshes sieve.
9. The process of claim 1, wherein the inorganic nano-calcium silicate-based thermal insulation product comprises: the stirring assembly body in the step c is set as follows: the stirring assembly is provided with a lifting piece and a stirring frame, the lifting piece is fixedly connected to the other side of the processing table, the mixing cavity is arranged between the lifting piece and the fixing frame, one side of the lifting piece, which is close to the mixing cavity, is fixedly connected with the stirring frame, one side of the stirring frame, which is close to the mixing cavity, is provided with a rotating piece and a stirring rod, the rotating piece is positioned on one side of the stirring rod and comprises a rotating motor, a motor base, a driving wheel and a guide gear, the motor base is fixedly connected to the bottom of the stirring frame, the rotating motor is fixedly connected to the upper side of the motor base, the top of the rotating motor is rotatably connected with a long rod rotating shaft, the two ends of the long rod rotating shaft are connected with the driving wheel and the guide gear, the driving wheel is positioned above the guide gear, one side of, top fixed connection of abnormal shape connecting rod and stirring rod, the stirring rod is the slope form, one side fixedly connected with spacing ring of agitator, the stirring rod passes the spacing ring, stirring rod fixedly connected with driven gear, guide gear and driven gear meshing, stirring rod fixedly connected with guide block, the guide block is located driven gear's below, one side fixedly connected with guide ring of agitator, the guide ring is located the below of spacing ring, guide ring and guide block phase-match, the bottom fixedly connected with stirring head of stirring rod, the stirring head is located the mixing chamber, it rotates with the action wheel to rotate motor control guide gear, thereby drive from the driving wheel and rotate, make the stirring head rotate at the mixing chamber.
10. The process of claim 9, wherein the inorganic nano-calcium silicate-based thermal insulation product comprises: the lifting piece comprises a lifting frame and a lifting platform, the driving shaft and a driven shaft are fixedly connected with the other side of the stirring frame, adjusting grooves are formed in two sides of the lifting frame, inserting blocks are arranged at the bottom of the lifting platform and movably connected in the adjusting grooves, the lifting frame is rotatably connected with the driving shaft, the driving shaft is positioned below the adjusting grooves, a first eccentric gear is fixedly connected to the middle of the driving shaft, first guide wheels are arranged at two ends of the driving shaft, the driven shaft is rotatably connected between the bottoms of the two inserting blocks, a second eccentric gear is arranged at the middle of the driven shaft corresponding to the first eccentric gear and meshed with the first eccentric gear, second guide wheels are correspondingly arranged at two ends of the driven shaft, the first guide wheels are matched with the second guide wheels, the driven shaft is controlled to rotate by rotation of the driving shaft, so that the lifting platform is controlled to lift, and the lifting platform drives the stirring, so that the stirring head can be lifted in the mixing cavity.
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