CN109092514B - Preparation method of high-fluidity quartz powder - Google Patents
Preparation method of high-fluidity quartz powder Download PDFInfo
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- CN109092514B CN109092514B CN201810828657.5A CN201810828657A CN109092514B CN 109092514 B CN109092514 B CN 109092514B CN 201810828657 A CN201810828657 A CN 201810828657A CN 109092514 B CN109092514 B CN 109092514B
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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
- B02C21/00—Disintegrating plant with or without drying of the material
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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
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
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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
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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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
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
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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
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/126—Preparation of silica of undetermined type
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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
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
- B02C2023/165—Screen denying egress of oversize material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention discloses a preparation method of high-fluidity quartz powder, which comprises the following steps: s1, primary crushing: crushing stone materials by using the matching of crushing rollers; s2, primary screening: filtering large-particle stones by using a filter screen and then dropping the stones to the bottom of the crushing box; s3, burning to prepare powder: the angular quartz powder is firstly melted into amorphous particles in a combustion furnace, and the amorphous particles shrink into spherical particles when the amorphous particles are rapidly cooled after leaving a high-temperature field; s4, collecting and packaging: and dropping the spherical particle quartz powder into the material collecting box to prepare a high-fluidity quartz powder finished product, and pumping out the material collecting box to pack and store the high-fluidity quartz powder finished product. The invention has the advantages of convenient operation, time and labor saving, improvement of the fluidity of the quartz powder, acceleration of the working efficiency, safety and stability.
Description
Technical Field
The invention belongs to the technical field of preparation of quartz powder, and particularly relates to a preparation method of high-fluidity quartz powder.
Background
The quartz powder is also called silica powder and quartz sand, is a hard, wear-resistant and chemically stable silicate mineral, and has the main mineral component of SiO2, the color of which is milk white or colorless and semitransparent, the hardness of which is 7, the property of brittleness and no cleavage, conchoidal fracture, the gloss of grease, the density of which is 2.65, the bulk density (20-200 meshes of which is 1.5), the chemical, thermal and mechanical properties of which have obvious anisotropy, and the quartz powder is insoluble in acid, slightly soluble in KOH solution and has a melting point of 1650 ℃. After the quartz stone extracted from the mine is processed, strictly speaking, the product with the fineness below 120 meshes (less than 120 meshes) is called quartz sand, and the product with the fineness above 120 meshes is called quartz powder. The quartz powder is not classified, and is only classified according to specifications. The white cast iron has the characteristics of high whiteness, no impurities, low iron content and the like, so the white cast iron has wide application range.
Chinese patent application 201510196169.3 discloses a quartz powder surface activity composite modification method, which comprises the following steps: (1) stirring a certain amount of quartz powder to be modified at a low speed for 4-6 minutes, and then stirring at a high speed for 10-15 minutes; (2) respectively weighing a silane coupling agent and methanol according to 0.3-0.4% and 0.35-0.45% of the weight of quartz powder, uniformly mixing the silane coupling agent and the methanol, adding the mixture into the quartz powder, stirring at a low speed for 1-3 minutes, and then stirring at a high speed for 12-16 minutes; (3) adding stearic acid in an amount of 0.04-0.1% by weight of the quartz powder, and stirring at a high speed for 1-3 minutes to obtain the required quartz powder.
However, the fluidity of the quartz powder in the prior art cannot be improved during preparation, and in order to improve the fluidity of the quartz powder, additional equipment is required to modify the prepared quartz powder, so that on one hand, the operation is troublesome, the preparation cost is increased, on the other hand, the preparation efficiency is reduced, the consumption is long, and a large amount of labor is consumed.
Disclosure of Invention
The invention aims to provide a preparation method of high-fluidity quartz powder, and aims to solve the technical problems that in the prior art, the fluidity of the quartz powder cannot be improved during preparation, and in order to improve the fluidity of the quartz powder, additional equipment is required to modify the prepared quartz powder, so that the preparation cost is increased, the preparation efficiency is reduced, the time consumption is long, and a large amount of labor is consumed.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of high-fluidity quartz powder comprises the following steps:
s1, primary crushing: the electric cabinet is used for controlling the motor to drive the grinding rollers to rotate, then quartz stone mineral aggregate is added into the grinding box from the feed hopper, and the two rotating grinding rollers are matched to grind the stone aggregate;
s2, primary screening: the crushed stone falls to the bottom of the crushing box after being filtered by two groups of filter screens, and the large stone can be poured into a feed hopper for crushing after the filter screens are drawn out;
s3, burning to prepare powder: opening a valve on a gas pipeline, controlling the operation of an air pump and an electronic igniter by using an electric cabinet, spraying quartz powder at the bottom of a crushing box into a combustion furnace from a nozzle by using the air pump, conveying angular quartz powder into flame generated by the electronic igniter and the gas in a matching way along with air flow, melting the angular quartz powder into amorphous particles when the angular powder passes through a high-temperature flame field, and quickly cooling the angular powder after the angular powder leaves the high-temperature field to instantly shrink the amorphous particles into spherical particles;
s4, collecting and packaging: and finally, dropping the spherical particles into a material collecting box to prepare a high-fluidity quartz powder finished product, and pumping out the material collecting box to pack and store the high-fluidity quartz powder finished product.
Preferably, in step S1, the quartz stone ore material is processed into small stone material by a jaw rock breaking machine before use, so that the quartz stone ore material can be put into a feed hopper for crushing.
Preferably, in step S3, the electronic igniter and the gas are cooperated to generate flame, and the high temperature generated by the flame combustion is discharged through the gas outlet pipe, and finally enters the crushing box through the gas inlet pipe to preheat the crushed stone, and the size of the flame combustion can be conveniently controlled through the gas inlet valve.
Preferably, in step S3, the fuel gas introduced into the fuel gas pipeline includes acetylene gas, liquefied petroleum gas, hydrogen gas, or natural gas.
Preferably, in step S3, in order to improve the flowability of the quartz powder and reduce energy consumption, the gas introduced into the gas pipeline is a mixed gas of acetylene gas and oxygen, and the volume ratio κ is (1.5-2.2): (4.3-6.2), and the high temperature T is 1850-3230 ℃. Further, the volume ratio of κ to the high temperature T satisfies κ · T of 780 or more and 1540 or less.
Preferably, in step S3, the size D of the spherical particles is 400-1000 mesh. Further, in order to further improve the fluidity of the quartz powder, the volume ratio k and the high temperature T of the specification D of the spherical particles to the mixed gas of acetylene gas and oxygen satisfy the following relations:
D=T/［ε·（1/κ）］；
wherein epsilon is the specification coefficient of the spherical particles, and the value range is 1.05-2.78; (1/κ) is the volume factor; the above formula only performs numerical calculation, and does not involve unit operation.
The preparation method adopts a preparation device of high-fluidity quartz powder, the preparation device comprises a crushing box and a combustion furnace, the outer sides of the bottoms of the crushing box and the combustion furnace are both provided with damping support legs, the top of the crushing box is provided with a feed hopper, two groups of mutually matched crushing rollers are fixedly arranged in the crushing box through bearings, a motor in transmission connection with the crushing rollers is fixedly arranged on one side of the top end of the front surface of the crushing box, a limiting groove is arranged on the inner wall of the crushing box and positioned at the bottom end of the crushing rollers, and the limiting groove is connected with a filter screen in a sliding way, one side of the crushing box is provided with an air inlet pipe, the other side of the crushing box is fixedly provided with an air pump, the bottom end of one side of the air pump, which penetrates through the crushing box, is connected with a dust hood, and the output end of the air pump is connected with a nozzle which penetrates through the upper end of one side of the combustion furnace through a pipeline, and an electronic igniter is fixedly arranged on the inner wall of the combustion furnace.
The gas-fired boiler is characterized in that a gas pipeline communicated with an electronic igniter is fixed on the outer side of the combustion furnace, an air inlet valve is connected to the bottom end of the front face of the combustion furnace, a material collecting box is connected to the bottom end of the inner portion of the combustion furnace in a sliding mode, an air outlet pipe is welded to the top of the combustion furnace, and the air outlet pipe is fixedly connected with the air inlet pipe through a pipeline.
Preferably, the filter screens are at least provided with two groups, and the end parts of the two groups of filter screens penetrate through the crushing box and are connected with the end covers with the drawing blocks.
Preferably, the bottom end of the interior of the crushing box is inclined by 10-20 degrees, and the dust hood is positioned at the bottom end of the inclined part in the crushing box.
Preferably, a valve is installed inside the gas pipeline, and an adjusting handrail in transmission connection with the valve is arranged on the surface of the gas pipeline.
Preferably, the air inlet valve comprises guide rails positioned at the upper end and the lower end of the air inlet, and a baffle plate adhered with a sealing gasket is connected between the guide rails in a sliding manner.
Preferably, the bottom end inside the combustion furnace is provided with a sliding groove, the bottom end of the material collecting box is provided with a sliding block corresponding to the sliding groove in size, the outer end of the material collecting box penetrates through the combustion furnace and is provided with a drawing groove, and a sealing gasket is adhered at the joint of the combustion furnace and the material collecting box.
Preferably, the electric cabinet is embedded on one side of the front surface of the crushing box and is respectively connected with the motor, the air pump and the electronic igniter through wires.
Preferably, the damping support leg is provided with a damping pad at the lower part of the support leg, and the damping pad is made of rubber or polyethylene.
Compared with the prior art, the invention has the technical effects and advantages that:
1. according to the preparation method of the high-fluidity quartz powder, the crushing roller driven by the variable frequency motor is convenient for crushing the quartz stone mineral aggregate into the quartz powder, and the quartz powder can be screened by matching with a plurality of groups of filter screens, so that the quality of the quartz powder is improved;
2. according to the preparation method of the high-fluidity quartz powder, the quartz powder is sucked into the combustion furnace by the air pump and can be melted into amorphous particles by matching with the electronic igniter, and then the amorphous particles are quickly shrunk into spherical particles when being rapidly cooled after leaving a high-temperature field through free fall, so that the fluidity of the quartz powder is improved;
3. according to the preparation method of the high-fluidity quartz powder, the air outlet pipe and the air inlet pipe are connected through the pipeline, so that high temperature in the combustion furnace can be introduced into the crushing box to preheat crushed stone, and the energy consumption is reduced;
4. according to the preparation method of the high-fluidity quartz powder, the gas introduced into the gas pipeline is set to be the volume ratio of the mixed gas of acetylene gas and oxygen and the relation with high temperature T, so that the fluidity of the quartz powder is improved, and the energy consumption is reduced;
5. according to the preparation method of the high-fluidity quartz powder, the fluidity of the quartz powder is further improved by setting the relation which is satisfied between the specification of the spherical particles and the volume ratio kappa and the high temperature T of the mixed gas of acetylene gas and oxygen.
Drawings
FIG. 1 is a flow chart of a method for preparing high-fluidity quartz powder according to the present invention;
FIG. 2 is a schematic view of an apparatus for preparing high-fluidity quartz powder according to the present invention;
FIG. 3 is a sectional view of an apparatus for preparing high-fluidity quartz powder according to the present invention.
In FIGS. 2-3: 1 crushing case, 2 feeder hoppers, 3 crushing rollers, 4 variable frequency motors, 5 limiting grooves, 6 filter screens, 7 air inlet pipes, 8 air pumps, 9 dust hoods, 10 nozzles, 11 combustion furnaces, 12 electronic igniters, 13 gas pipelines, 14 valves, 15 air outlet pipes, 16 air inlet valves, 17 material collecting boxes, 18 sliding grooves, 19 sliding blocks, 20 damping supporting legs and 21 electric control boxes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, a method for preparing high-fluidity quartz powder comprises the following steps:
s1, primary crushing: the electric cabinet is used for controlling the variable frequency motor to drive the crushing rollers to rotate, then quartz stone mineral aggregate is added into the crushing box from the feed hopper, and the two groups of rotating crushing rollers are matched to crush the stone aggregate;
s2, primary screening: the crushed stone falls to the bottom of the crushing box after being filtered by two groups of filter screens, and the large-particle stone can be poured into a feed hopper for crushing or used as other ways after the filter screens are drawn out;
s3, burning to prepare powder: manually opening a valve in a gas pipeline, controlling an air pump and an electronic igniter to work by using an electric cabinet, spraying quartz powder at the bottom of a crushing box into a combustion furnace from a nozzle by using the air pump, conveying angular quartz powder to the electronic igniter along with air flow to generate flame in cooperation with gas, melting the angular quartz powder into amorphous particles when the angular quartz powder passes through a high-temperature flame field, and quickly cooling the amorphous particles after the angular quartz powder leaves the high-temperature field through a free falling body to instantly shrink the amorphous particles into spherical particles;
s4, collecting and packaging: and finally, the spherical particle quartz powder falls into the material collecting box to be prepared into a high-fluidity quartz powder finished product, and the material collecting box is drawn out to pack and store the high-fluidity quartz powder finished product.
In step S1, the quartz stone ore material is processed into small pieces by a jaw rock breaking machine before use, so that the quartz stone ore material can be put into a feed hopper for crushing.
The fuel gas introduced into the fuel gas pipeline comprises acetylene gas, liquefied petroleum gas or natural gas and other combustible gases.
In step S3, in order to improve the flowability of the quartz powder and reduce energy consumption, the volume ratio κ of the gas introduced into the gas pipeline as a mixed gas of acetylene gas and oxygen is (1.5-2.2): (4.3-6.2), and the high temperature T is 1850-3230 ℃.
Further, the volume ratio of κ to the high temperature T satisfies κ · T of 780 or more and 1540 or less.
In step S3, the size D of the spherical particles is 400-1000 mesh. Further, in order to further improve the fluidity of the quartz powder, the volume ratio k and the high temperature T of the specification D of the spherical particles to the mixed gas of acetylene gas and oxygen satisfy the following relations:
D=T/［ε·（1/κ）］；
wherein epsilon is the specification coefficient of the spherical particles, and the value range is 1.05-2.78; (1/κ) is the volume factor; the above formula only performs numerical calculation, and does not involve unit operation.
As shown in fig. 2-3, the invention also provides a preparation device of the fluid quartz powder, which is used in the preparation method, the preparation device comprises a crushing box 1 and a combustion furnace 11, the outer sides of the bottoms of the crushing box 1 and the combustion furnace 11 are both provided with damping legs 20, the top of the crushing box 1 is welded with a feed hopper 2, the inside of the crushing box 1 is fixedly provided with two groups of mutually matched crushing rollers 3 through bearings, one side of the front top end of the crushing box 1 is fixedly provided with a variable frequency motor 4 in transmission connection with the crushing rollers 3, the inner wall of the crushing box 1 is provided with a limiting groove 5 at the bottom end of the crushing rollers 3, the limiting groove 5 is connected with a filter screen 6 in a sliding manner, one side of the crushing box 1 is welded with an air inlet pipe 7, the other side of the crushing box 1 is fixedly provided with an air pump 8, the bottom end of one side of the air pump 8 penetrating, and the output end of the air pump 8 is connected with a nozzle 10 which penetrates through the upper end of one side of the combustion furnace 11 through a pipeline, and an electronic igniter 12 is fixedly arranged on the inner wall of the combustion furnace 11.
A gas pipeline 13 communicated with the electronic igniter 12 is fixed on the outer side of the combustion furnace 11, an air inlet valve 16 is connected to the bottom end of the front surface of the combustion furnace 11 in a sliding manner, a material collecting box 17 is connected to the bottom end of the inner part of the combustion furnace 11 in a sliding manner, an air outlet pipe 15 is welded on the top of the combustion furnace 11, and the air outlet pipe 15 is fixedly connected with the air inlet pipe 7 through a pipeline.
The filter screens 6 are at least provided with two groups, and the end parts of the two groups of filter screens 6 penetrate through the crushing box 1 and are connected with end covers with the drawing blocks. The screening effect of the quartz powder can be improved through the multiple groups of filter screens 6, and the end cover with the drawing block can be convenient for drawing out the filter screens 6.
The bottom end in the crushing box 1 is inclined by 10-20 degrees, and the dust hood 9 is positioned at the bottom end of the inclined part in the crushing box 1. The suction hood 9 is positioned at the bottom end of the inclined part in the crushing box 1, so that quartz powder at the bottom end in the crushing box 1 can be conveniently sucked into the combustion furnace 11 by the air pump 8.
The inside of gas pipeline 13 is installed with valve 14, and the surface of gas pipeline 13 is equipped with the regulation handrail of being connected with valve 14 transmission. The valve 14 and the adjusting handle in driving connection with the valve 14 can facilitate the control of the guiding quantity of the gas in the gas pipeline 13.
The air inlet valve 16 comprises guide rails positioned at the upper end and the lower end of the air inlet, and a baffle plate adhered with a sealing gasket is connected between the guide rails in a sliding manner. The baffle plate which is adhered with the sealing gasket between the guide rail and the guide rail can be used for conveniently adjusting the space size of the air inlet, and the adjustment is convenient, so that the flame combustion can be controlled.
The bottom end of the interior of the combustion furnace 11 is provided with a sliding groove 18, the bottom end of the material collecting box 17 is provided with a sliding block 19 corresponding to the sliding groove 18 in size, the outer end of the material collecting box 17 penetrates through the combustion furnace 11 to be provided with a drawing groove, and a sealing gasket is adhered at the joint of the combustion furnace 11 and the material collecting box 17. The sliding of the material collecting box 17 and the combustion furnace 11 can be facilitated through the sliding grooves 18 and the sliding blocks 19, the drawing grooves can facilitate the extraction of the material collecting box 17 and the propulsion of the combustion furnace 11, and the sealing performance between the material collecting box 17 and the combustion furnace 11 can be improved by utilizing a sealing gasket.
One side of the front surface of the crushing box 1 is embedded with an electric cabinet 21, and the electric cabinet 21 is respectively connected with the variable frequency motor 4, the air pump 8 and the electronic igniter 12 through wires.
In summary, the following steps: the invention is convenient to crush quartz mineral aggregate into quartz powder by the crushing roller 3 driven by the variable frequency motor 4, and can sieve the quartz powder by matching with a plurality of groups of filter screens 6, the quartz powder is sucked into the combustion furnace 11 by the air pump 8 and can be melted into amorphous particles by matching with the electronic igniter 12, and then the amorphous particles are quickly shrunk and become spherical particles when being rapidly cooled after leaving a high temperature field through free falling bodies, and the air outlet pipe 15 and the air inlet pipe 7 are connected through a pipeline to introduce high temperature in the combustion furnace 11 into the crushing box 1 to preheat crushed stone.
Example 2
As shown in fig. 1, a method for preparing high-fluidity quartz powder comprises the following steps:
s1, primary crushing: the electric cabinet is used for controlling the variable frequency motor to drive the crushing rollers to rotate, then quartz stone mineral aggregate is added into the crushing box from the feed hopper, and the two groups of rotating crushing rollers are matched to crush the stone aggregate;
s2, primary screening: the crushed stone falls to the bottom of the crushing box after being filtered by two groups of filter screens, and the large-particle stone can be poured into a feed hopper for crushing or used as other ways after the filter screens are drawn out;
s3, burning to prepare powder: manually opening a valve in a gas pipeline, controlling an air pump and an electronic igniter to work by using an electric cabinet, spraying quartz powder at the bottom of a crushing box into a combustion furnace from a nozzle by using the air pump, conveying angular quartz powder to the electronic igniter along with air flow to generate flame in cooperation with gas, melting the angular quartz powder into amorphous particles when the angular quartz powder passes through a high-temperature flame field, and quickly cooling the amorphous particles after the angular quartz powder leaves the high-temperature field through a free falling body to instantly shrink the amorphous particles into spherical particles;
s4, collecting and packaging: and finally, the spherical particle quartz powder falls into the material collecting box to be prepared into a high-fluidity quartz powder finished product, and the material collecting box is drawn out to pack and store the high-fluidity quartz powder finished product.
In step S1, the quartz stone ore material is processed into small pieces by a jaw rock breaking machine before use, so that the quartz stone ore material can be put into a feed hopper for crushing.
In step S3, the high temperature generated by the flame combustion generated by the electronic igniter and the gas is discharged through the gas outlet pipe, and then enters the crushing box through the gas inlet pipe to preheat the crushed stone, and the size of the flame combustion can be conveniently controlled through the gas inlet valve. The fuel gas introduced into the fuel gas pipeline is hydrogen.
As shown in fig. 2-3, the invention also provides a preparation device of the fluid quartz powder, which is used in the preparation method, the preparation device comprises a crushing box 1 and a combustion furnace 11, the outer sides of the bottoms of the crushing box 1 and the combustion furnace 11 are both provided with damping legs 20, the top of the crushing box 1 is welded with a feed hopper 2, the inside of the crushing box 1 is fixedly provided with two groups of mutually matched crushing rollers 3 through bearings, one side of the front top end of the crushing box 1 is fixedly provided with a variable frequency motor 4 in transmission connection with the crushing rollers 3, the inner wall of the crushing box 1 is provided with a limiting groove 5 at the bottom end of the crushing rollers 3, the limiting groove 5 is connected with a filter screen 6 in a sliding manner, one side of the crushing box 1 is welded with an air inlet pipe 7, the other side of the crushing box 1 is fixedly provided with an air pump 8, the bottom end of one side of the air pump 8 penetrating, and the output end of the air pump 8 is connected with a nozzle 10 which penetrates through the upper end of one side of the combustion furnace 11 through a pipeline, and an electronic igniter 12 is fixedly arranged on the inner wall of the combustion furnace 11.
A gas pipeline 13 communicated with the electronic igniter 12 is fixed on the outer side of the combustion furnace 11, an air inlet valve 16 is connected to the bottom end of the front surface of the combustion furnace 11 in a sliding manner, a material collecting box 17 is connected to the bottom end of the inner part of the combustion furnace 11 in a sliding manner, an air outlet pipe 15 is welded on the top of the combustion furnace 11, and the air outlet pipe 15 is fixedly connected with the air inlet pipe 7 through a pipeline.
The filter screens 6 are at least provided with two groups, and the end parts of the two groups of filter screens 6 penetrate through the crushing box 1 and are connected with end covers with the drawing blocks. The screening effect of the quartz powder can be improved through the multiple groups of filter screens 6, and the end cover with the drawing block can be convenient for drawing out the filter screens 6.
The bottom end in the crushing box 1 is inclined by 10-20 degrees, and the dust hood 9 is positioned at the bottom end of the inclined part in the crushing box 1. The suction hood 9 is positioned at the bottom end of the inclined part in the crushing box 1, so that quartz powder at the bottom end in the crushing box 1 can be conveniently sucked into the combustion furnace 11 by the air pump 8.
The inside of gas pipeline 13 is installed with valve 14, and the surface of gas pipeline 13 is equipped with the regulation handrail of being connected with valve 14 transmission. The valve 14 and the adjusting handle in driving connection with the valve 14 can facilitate the control of the guiding quantity of the gas in the gas pipeline 13.
The air inlet valve 16 comprises guide rails positioned at the upper end and the lower end of the air inlet, and a baffle plate adhered with a sealing gasket is connected between the guide rails in a sliding manner. The baffle plate which is adhered with the sealing gasket between the guide rail and the guide rail can be used for conveniently adjusting the space size of the air inlet, and the adjustment is convenient, so that the flame combustion can be controlled.
The bottom end of the interior of the combustion furnace 11 is provided with a sliding groove 18, the bottom end of the material collecting box 17 is provided with a sliding block 19 corresponding to the sliding groove 18 in size, the outer end of the material collecting box 17 penetrates through the combustion furnace 11 to be provided with a drawing groove, and a sealing gasket is adhered at the joint of the combustion furnace 11 and the material collecting box 17. The sliding of the material collecting box 17 and the combustion furnace 11 can be facilitated through the sliding grooves 18 and the sliding blocks 19, the drawing grooves can facilitate the extraction of the material collecting box 17 and the propulsion of the combustion furnace 11, and the sealing performance between the material collecting box 17 and the combustion furnace 11 can be improved by utilizing a sealing gasket.
One side of the front surface of the crushing box 1 is embedded with an electric cabinet 21, and the electric cabinet 21 is respectively connected with the variable frequency motor 4, the air pump 8 and the electronic igniter 12 through wires.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. The preparation method of the high-fluidity quartz powder is characterized by comprising the following steps of:
s1, primary crushing: the electric cabinet is used for controlling the variable frequency motor to drive the crushing rollers to rotate, then quartz stone mineral aggregate is added into the crushing box from the feed hopper, and the two groups of rotating crushing rollers are matched to crush the stone aggregate;
s2, primary screening: the crushed stone falls to the bottom of the crushing box after being filtered by two groups of filter screens, and the filter screens are drawn out to pour the large stone into the feed hopper again for crushing;
s3, burning to prepare powder: manually opening a valve in a gas pipeline, controlling an air pump and an electronic igniter to work by using an electric cabinet, spraying quartz powder at the bottom of a crushing box into a combustion furnace from a nozzle by using the air pump, conveying angular quartz powder to the electronic igniter along with air flow to generate flame in cooperation with gas, melting the angular quartz powder into amorphous particles when the angular quartz powder passes through a high-temperature flame field, and quickly cooling the amorphous particles after the angular quartz powder leaves the high-temperature field through a free falling body to instantly shrink the amorphous particles into spherical particles; the fuel gas introduced into the fuel gas pipeline is a mixed gas of acetylene gas and oxygen, and the volume ratio kappa of the acetylene gas to the oxygen to the high temperature T meets the condition that kappa.T is more than or equal to 780 and less than or equal to 1540; the volume ratio kappa of the specification D of the spherical particles to the mixed gas of acetylene gas and oxygen and the high temperature T satisfy the following relations:
D=T/［ε·（1/κ）］；
wherein epsilon is the specification coefficient of the spherical particles, and the value range is 1.05-2.78; (1/κ) is the volume factor;
s4, collecting and packaging: and finally, the spherical particle quartz powder falls into the material collecting box to be prepared into a high-fluidity quartz powder finished product, and the material collecting box is drawn out to pack and store the high-fluidity quartz powder finished product.
2. The method for preparing high-fluidity quartz powder according to claim 1, wherein: in step S1, the quartz stone aggregate is processed into small stone materials by a jaw rock breaking machine before use.
3. The method for preparing a high-fluidity quartz powder according to claim 1 or 2, wherein: the preparation method adopts a preparation device of high-fluidity quartz powder, the preparation device comprises a crushing box (1) and a combustion furnace (11), the outer sides of the bottoms of the crushing box (1) and the combustion furnace (11) are respectively provided with a damping support leg (20), the top of the crushing box (1) is provided with a feed hopper (2), two groups of mutually matched crushing rollers (3) are fixedly arranged in the crushing box (1) through bearings, one side of the top end of the front surface of the crushing box (1) is fixedly provided with a motor (4) in transmission connection with the crushing rollers (3), the bottom end of the crushing roller (3) on the inner wall of the crushing box (1) is provided with a limiting groove (5), and a filter screen (6) is in sliding connection with the limiting groove (5); one side of the crushing box (1) is provided with an air inlet pipe (7), an air pump (8) is fixedly mounted on the other side of the crushing box (1), the bottom end of one side, penetrating through the crushing box (1), of the input end of the air pump (8) is connected with a dust hood (9), the output end of the air pump (8) is connected with a nozzle (10) penetrating through the upper end of one side of the combustion furnace (11) through a pipeline, and an electronic igniter (12) is fixedly mounted on the inner wall of the combustion furnace (11).
4. The method for preparing high-fluidity quartz powder according to claim 3, wherein: a gas pipeline (13) communicated with the electronic igniter (12) is fixed on the outer side of the combustion furnace (11), an air inlet valve (16) is connected to the bottom end of the front surface of the combustion furnace (11) in a sliding manner, and a material collecting box (17) is connected to the bottom end of the interior of the combustion furnace (11) in a sliding manner.
5. The method for preparing high-fluidity quartz powder according to claim 3, wherein: the bottom end of the interior of the crushing box (1) is inclined by 10-20 degrees, and the dust hood (9) is positioned at the bottom end of the inclined part in the crushing box (1).
6. The method for preparing high-fluidity quartz powder according to claim 3, wherein: the combustion furnace is characterized in that a sliding groove (18) is formed in the bottom end of the interior of the combustion furnace (11), a sliding block (19) corresponding to the sliding groove (18) in size is arranged at the bottom end of the material collecting box (17), a drawing groove is formed in the outer end of the material collecting box (17) in a penetrating mode through the combustion furnace (11), and a sealing gasket is adhered to the joint of the combustion furnace (11) and the material collecting box (17).
7. The method for preparing high-fluidity quartz powder according to claim 3, wherein: one side of the front surface of the crushing box (1) is embedded with an electric cabinet (21), and the electric cabinet (21) is respectively connected with the motor (4), the air pump (8) and the electronic igniter (12) through wires.
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