CN111925454B - System and method for preparing hematite inhibitor corn starch for reverse flotation - Google Patents
System and method for preparing hematite inhibitor corn starch for reverse flotation Download PDFInfo
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- CN111925454B CN111925454B CN202010770107.XA CN202010770107A CN111925454B CN 111925454 B CN111925454 B CN 111925454B CN 202010770107 A CN202010770107 A CN 202010770107A CN 111925454 B CN111925454 B CN 111925454B
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- 229920002261 Corn starch Polymers 0.000 title claims abstract description 164
- 239000008120 corn starch Substances 0.000 title claims abstract description 164
- 238000005188 flotation Methods 0.000 title claims abstract description 40
- 229910052595 hematite Inorganic materials 0.000 title claims abstract description 39
- 239000011019 hematite Substances 0.000 title claims abstract description 39
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000003112 inhibitor Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims abstract description 174
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000000084 colloidal system Substances 0.000 claims abstract description 31
- 238000003860 storage Methods 0.000 claims description 92
- 238000007599 discharging Methods 0.000 claims description 48
- 238000003756 stirring Methods 0.000 claims description 45
- 238000005086 pumping Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002776 aggregation Effects 0.000 abstract description 4
- 238000005054 agglomeration Methods 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 229940099112 cornstarch Drugs 0.000 description 127
- 239000000243 solution Substances 0.000 description 22
- 208000028659 discharge Diseases 0.000 description 21
- 238000004321 preservation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000003814 drug Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000012456 homogeneous solution Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 206010035653 pneumoconiosis Diseases 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 208000028571 Occupational disease Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000012840 feeding operation Methods 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B30/00—Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
- B03D1/016—Macromolecular compounds
Abstract
The invention discloses a system and a method for preparing hematite inhibitor corn starch for reverse flotation, wherein the system comprises the following steps: feeding device and preparation device, preparation device includes: the device comprises a first preparation unit, a cold water supply device, a second preparation unit and a hot water supply device, wherein the cold water supply device supplies cold water to the first preparation unit, the first preparation unit is also connected with a feeding device, and corn starch and the cold water form a corn starch colloid in the first preparation unit; the hot water supply device supplies hot water to the second preparation unit, the second preparation unit is also connected with the first preparation unit, and the corn starch colloid and the hot water form a corn starch solution in the second preparation unit to serve as a hematite inhibitor for reverse flotation. The invention adopts secondary preparation, avoids the formation of paste agglomeration of hot water and corn starch in the existing preparation process, protects pipelines and conveying equipment from being blocked by agglomeration adhesion, and optimizes the reverse flotation effect.
Description
Technical Field
The invention belongs to the technical field of preparation of agents in concentrating mills, and particularly relates to a system and a method for preparing hematite inhibitor corn starch for reverse flotation.
Background
Currently in the flotation operation of hematite or a mixture of ores containing hematite, when hematite is the mineral of interest, the hematite product is the underflow of the reverse flotation operation. In order to effectively prevent the loss of target minerals caused by the fact that hematite is carried into a foam product by flotation foam, the reverse flotation of the hematite is usually carried out by adding a corn starch solution into the ore, and the adhesion of the corn starch on the surface of the hematite is improved, so that the adhesion of the hematite and the foam is inhibited, and the effect of the corn starch serving as an inhibitor of the hematite in the reverse flotation is very remarkable. Most concentrating mills currently suffer from a number of disadvantages when corn starch is used to prepare corn starch solutions. If the bagged corn starch is transported to a medicament preparation workshop for piling up by an automobile, the bagged corn starch is manually transported to a corn starch preparation stirring tank, and after a knife is used for breaking the packaging bag, the corn starch is discharged into the stirring tank and is stirred and mixed with hot water to prepare the corn starch aqueous solution. In the mode, a large amount of corn starch dust is generated in each process of stacking, carrying, bag breaking and unloading of corn starch, so that environmental pollution and pneumoconiosis are caused. Moreover, by adopting the mode, the amount of the piled up medicines is more than 10 days, the piled up area is overlarge, and the factory investment is high. In addition, by adopting the preparation method, the corn starch is directly added into the stirring tank, the corn starch is easy to accumulate into a paste of agglomerated mass when meeting hot water, the prepared corn starch solution is heterogeneous, contains a plurality of suspended matters, and the finished product medicament has poor quality and seriously affects the effect of the reverse flotation of hematite.
Disclosure of Invention
In view of the above problems, the invention aims to provide a system and a method for preparing hematite inhibitor corn starch for reverse flotation, which are used for solving the problems of easy environmental pollution and poor preparation effect in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
one aspect of the present invention provides a hematite inhibitor corn starch preparation system for reverse flotation, comprising: the device comprises a feeding device and a preparation device, wherein the feeding device is used for providing corn starch for the preparation device; the preparation device comprises: the device comprises a first preparation unit, a cold water supply device, a second preparation unit and a hot water supply device, wherein the cold water supply device is connected with the first preparation unit and is used for supplying cold water to the first preparation unit, the first preparation unit is also connected with a feeding device and is used for receiving corn starch supplied by the feeding device, and corn starch and cold water form a corn starch colloid in the first preparation unit; the hot water supply device is connected with the second preparation unit and supplies hot water to the second preparation unit, the second preparation unit is also connected with the first preparation unit and receives the corn starch colloid prepared by the first preparation unit, and the corn starch colloid and the hot water form a corn starch solution in the second preparation unit and serve as a hematite inhibitor for reverse flotation.
Preferably, the first preparation unit comprises: the device comprises a primary preparation stirring tank, a first feeding pipeline, a first discharging pipeline and a first pumping device, wherein the primary preparation stirring tank is provided with a feeding port and a discharging port, the feeding port is arranged on the upper portion of the primary preparation stirring tank, the feeding port is connected with a feeding device through the first feeding pipeline, the discharging port is arranged on the lower portion of the primary preparation stirring tank and is connected with the first discharging pipeline, one end of the first discharging pipeline is connected with the discharging port, the other end of the first discharging pipeline is connected with the first pumping device, and the corn starch colloid is conveyed to the second preparation unit through the first pumping device.
Preferably, the second preparation unit comprises: the device comprises a secondary preparation stirring tank, a second feeding pipeline, a second discharging pipeline and a second pumping device, wherein the second feeding pipeline is arranged on the upper portion of the secondary preparation stirring tank and connected with the first preparation unit, a spiral steam pipeline is arranged on the inner tank wall of the secondary preparation stirring tank, a steam inlet and a steam exhaust port are formed in the top of the secondary preparation stirring tank, the second discharging pipeline is arranged on the lower portion of the secondary preparation stirring tank and connected with the second pumping device, and the second pumping device is used for conveying corn starch solution formed by preparation.
Preferably, the feeding device comprises a material conveying device and a material discharging device, wherein the material conveying device comprises a storage device, the storage device is used for storing corn starch, and the storage device is provided with a primary air inlet joint and a material discharging joint; the discharging device comprises: the device comprises a first air compressor and a primary air storage tank, wherein the first air compressor is connected with the primary air storage tank and is used for storing compressed air to the primary air storage tank, the primary air storage tank is connected with a primary air inlet joint, the compressed air in the primary air storage tank enters the storage device through the primary air inlet joint, and corn starch in the storage device is discharged through a discharge joint.
Preferably, the storage device is further provided with a secondary air inlet joint, and the discharging device further comprises: the secondary air storage tank is connected with the first air compressor, compressed air is stored through the first air compressor, the secondary air storage tank is connected with the secondary air inlet connector, the compressed air in the secondary air storage tank enters the storage device through the secondary air inlet connector, and corn starch in the storage device is discharged through the discharge connector; the device comprises a quantitative box, wherein a third feeding pipeline is arranged on one side of the quantitative box, the third feeding pipeline is connected with the discharging connector, a third discharging pipeline is arranged on the other side of the quantitative box, and the third discharging pipeline is connected with the first preparation unit; and the second air compressor is connected with the quantitative box and is used for discharging the corn starch in the quantitative box to the first preparation unit.
Preferably, the discharging device further comprises a weight measuring device disposed below the quantitative tank for measuring the entire weight of the quantitative tank.
Preferably, the weight measuring device is a plurality of pressure gauges arranged at the bottom of the quantitative box, and the pressure gauges are connected with the bottom plate of the quantitative box through bolts and are connected with the supporting beam of the quantitative box.
The invention also provides a preparation method of hematite inhibitor corn starch for reverse flotation, which comprises the following steps:
step S1, conveying corn starch to a first preparation unit through a feeding device;
step S2, providing a set amount of cold water to a first preparation unit through a cold water providing device, and mixing the cold water and corn starch in the first preparation unit to form corn starch colloid;
and S3, conveying the corn starch colloid to a second preparation unit, providing a set amount of hot water for the second preparation unit through a hot water providing device, and mixing the hot water and the corn starch colloid in the second preparation unit to form a corn starch solution serving as a hematite inhibitor for reverse flotation.
Preferably, the preparation method further comprises:
and S4, inputting steam into the second preparation unit through a spiral steam pipeline, and preserving heat of the corn starch solution.
Preferably, the step S1 includes:
compressed air is stored in the primary air storage tank and the secondary air storage tank through a first air compressor;
compressed air in the primary air storage tank is conveyed to the storage device through the primary air inlet connector, and corn starch in the storage device is discharged into the quantitative box under the drive of the compressed air;
compressed air in the secondary air storage tank is conveyed to the storage device through the secondary air inlet connector, and corn starch in the storage device is discharged into the quantitative box under the driving of the compressed air;
and after the corn starch in the quantitative box reaches the preset weight, discharging the corn starch in the quantitative box to a first preparation unit through a second air compressor.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention adopts secondary preparation and first-stage preparation of the corn starch inhibitor, adopts cold water to form homogenized colloid distribution of corn starch and water, avoids hot water and corn starch from forming a paste aggregation in the existing preparation process, protects pipelines and conveying equipment from being blocked by adhesion of the aggregation, and creates conditions for forming a homogenized corn starch solution in the secondary preparation. The second stage is to prepare a corn starch homogeneous solution by adopting hot water, hot water and a homogeneous colloid. The preparation of the homogeneous solution ensures the homogeneous adsorption of the corn starch and the hematite surface during the reverse flotation, and optimizes the reverse flotation effect.
The invention has simple manufacturing procedure, no need of manual operation, cost saving, no environmental pollution and personnel injury, and good preparation effect.
Drawings
FIG. 1 is a block diagram of a system for preparing hematite inhibitor corn starch for reverse flotation according to the present invention;
FIG. 2 is a schematic diagram of an embodiment of a system for preparing hematite inhibitor corn starch for reverse flotation according to the present invention;
FIG. 3 is a schematic flow chart of the method for preparing hematite inhibitor corn starch for reverse flotation according to the present invention.
Detailed Description
Embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art will recognize that the described embodiments may be modified in various different ways, or combinations thereof, without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive in scope. Furthermore, in the present specification, the drawings are not drawn to scale, and like reference numerals denote like parts.
Fig. 1 is a block diagram of a system for preparing hematite-depressing corn starch for reverse flotation according to the present invention, and as shown in fig. 1, the system for preparing hematite-depressing corn starch for reverse flotation according to the present invention comprises: a feeding device 100 and a preparation device, wherein the feeding device 100 is used for providing corn starch to the preparation device; the preparation device is used for preparing the hematite inhibitor corn starch.
Wherein, the preparation device includes: the device comprises a first preparation unit 200, a cold water supply device 300, a second preparation unit 400 and a hot water supply device 500, wherein the cold water supply device 300 is connected with the first preparation unit 200 to supply cold water to the first preparation unit 200, the first preparation unit 200 is also connected with the feeding device 100 to receive corn starch supplied by the feeding device 100, and the corn starch and the cold water form a corn starch colloid in the first preparation unit 200, wherein the corn starch colloid has a corn starch content (mass fraction) of about 20%; thus, the homogenized colloid distribution of the corn starch and the water is formed, the hot water and the corn starch form a paste aggregate in the traditional preparation process is stopped, the pipeline and the conveying equipment are protected from being blocked by the adhesion of the aggregate, and conditions are created for the secondary preparation to form a homogenized corn starch solution;
the hot water supply device 500 is connected with the second preparation unit 400, and supplies hot water to the second preparation unit 400, the second preparation unit 400 is further connected with the first preparation unit 200, and receives the corn starch colloid formed by the preparation of the first preparation unit 200, the corn starch colloid and the hot water form a corn starch solution in the second preparation unit 400, and the corn starch solution is used as a hematite inhibitor for reverse flotation, and the hot water and 20% concentration homogeneous colloid are prepared into a 3% -5% concentration corn starch homogeneous solution, so that homogeneous adsorption of corn starch and hematite surfaces during reverse flotation is ensured, and the effect of reverse flotation is optimized.
Fig. 2 is a schematic structural view of an embodiment of the hematite inhibitor corn starch preparation system for reverse flotation according to the present invention, and as shown in fig. 2, the first preparation unit 200 includes: the primary preparation stirring tank 30, a first feeding pipeline, a first discharging pipeline 34 and a first pumping device 35, wherein the primary preparation stirring tank 30 is provided with a feeding port 31 and a discharging port 48, the feeding port 31 is arranged on the upper portion of the primary preparation stirring tank 30, the primary preparation stirring tank is connected with the feeding device 100 through the first feeding pipeline, the discharging port 48 is arranged on the lower portion of the primary preparation stirring tank 30 and is connected with the first discharging pipeline 34, one end of the first discharging pipeline 34 is connected with the discharging port 48, the other end of the first discharging pipeline 34 is connected with the first pumping device 35, and the corn starch colloid is conveyed to the second preparation unit 400 through the first pumping device 35.
The cold water supply device 300 may be a cold water pipe 47 provided at an upper portion of the primary preparing and stirring tank 30, the cold water pipe 47 is connected to a cold water source, the cold water pipe 47 is provided with the first electric on-off valve 32 and the first flowmeter 33, and the cold water source supplies cold water to the primary preparing and stirring tank 30 through the cold water pipe 47, and the cold water temperature is 5-25 ℃. The first flow meter 33 is used to measure the incoming cold water flow. The cold water and the corn starch are stirred in a one-time preparation stirring tank 30 to prepare and form corn starch colloid, wherein the corn starch content is 20%.
In one embodiment, the second preparing unit 400 performs stirring using a stirring tank, and the second preparing unit 400 includes: the secondary preparation stirred tank 40, second feeding pipeline 36, second discharge pipeline 45 and second pumping device 46, wherein, second feeding pipeline 36 set up in the upper portion of secondary preparation stirred tank 40, with first preparation unit 200 is connected, be provided with helical steam pipeline 41 on the inside cell wall of secondary preparation stirred tank 40, helical steam pipeline 41 be provided with steam inlet 42 and steam vent 43 in the groove top of secondary preparation stirred tank 40, second discharge pipeline 45 set up in the lower part of secondary preparation stirred tank 40, with second pumping device 46 is connected, second pumping device 46 is used for carrying the corn starch solution that the preparation formed.
Further, a temperature detecting device (e.g., thermometer 44) is provided at the top of the secondarily prepared stirring tank 40. Adopts steam pipeline heat preservation, and steam pipeline equipartition is inboard in the cell body of secondary preparation stirred tank 40, and thermal efficiency is high, and the heat preservation is effectual. The temperature is set to be 60-70 ℃, so that the precipitation of corn starch caused by the reduction of the temperature is avoided, and the quality of corn starch solution is further ensured.
The secondary preparation of corn starch adopts hot water stirring, the hot water supply device 500 can be a hot water pipeline 37 arranged at the upper part of the secondary preparation stirring tank 40, a second electric switch valve 38 and a second flowmeter 39 are arranged on the hot water pipeline 37, and a hot water source supplies hot water to the secondary preparation stirring tank 40 through the hot water pipeline 37, wherein the temperature of the hot water is 90-95 ℃. The second flowmeter 39 is used to measure the incoming hot water flow. The hot water and the homogenized corn starch colloid with the concentration of 20 percent are stirred in a secondary preparation stirring tank 40 to prepare and form corn starch solution with the concentration of 3 to 5 percent.
In one embodiment, the first pumping device 35 and the second pumping device 46 may be eccentric screw pumps, the motors controlling the two eccentric screw pumps are variable frequency motors, and the corresponding discharging speed can be controlled by controlling the frequency of the eccentric screw pumps. The eccentric screw pump belongs to a volumetric pump, can effectively remove the adhesion of corn starch on equipment, and protects the equipment.
As shown in fig. 2, the feeding device 100 comprises a material transporting device and a material discharging device, wherein the material transporting device comprises a storage device, the storage device is used for storing corn starch, and the storage device is provided with a primary air inlet joint 3 and a material discharging joint 5; the discharging device comprises: the first air compressor 9 and the primary air storage tank 10, the first air compressor 9 is connected with the primary air storage tank 10 (through an air compressor pipeline) and is used for storing compressed air to the primary air storage tank 10, the primary air storage tank 10 is connected with the primary air inlet joint 3 through a primary air inlet hose 13, a third electric switch valve 15 is arranged on the primary air inlet hose 13, compressed air in the primary air storage tank 10 enters the storage device through the primary air inlet joint 3, and corn starch in the storage device is discharged through the discharge joint 5.
In one embodiment, the storage device is further provided with a secondary air inlet connection 4, and the discharge device further comprises: a secondary air storage tank 11, wherein the secondary air storage tank 11 is connected with the first air compressor 9 (connected through an air compressor pipeline), compressed air is stored through the first air compressor 9, the secondary air storage tank 11 is connected with the secondary air inlet joint 4 through a secondary air inlet hose 14, a fourth electric switch valve 16 is arranged on the secondary air inlet hose 14, compressed air in the secondary air storage tank 11 enters the storage device through the secondary air inlet joint 4, and corn starch in the storage device is discharged through a discharge joint 5; the quantitative tank 12, the quantitative tank 12 is a square airtight tank body, one side of the quantitative tank 12 is provided with a third feeding pipeline 17 (which may be a hose), the third feeding pipeline 17 is connected with the discharge joint 5, a fifth electric switch valve 18 is arranged on the third feeding pipeline 17, the other side of the quantitative tank 12 is provided with a discharge port 28, and the quantitative tank is connected with the first preparation unit 200 through a third discharge pipeline 29 (which may be a hose), for example, the quantitative tank is connected with a feed port 31 of the primary preparation stirring tank 30; and a second air compressor 25 connected to the quantitative tank 12 for discharging the corn starch in the quantitative tank 12 to the first preparing unit 200. The top of the quantitative box 12 is also provided with an air inlet 23, and is connected with an air outlet 26 of a second air compressor 25 through an air inlet hose 24, a sixth electric switch valve 27 is arranged on the air inlet hose 24, and the second air compressor 25 discharges compressed air into the quantitative box 12 through the air inlet hose 24 to drive corn starch in the quantitative box 12 to be discharged.
Preferably, the volume of the secondary air storage tank 11 is smaller than that of the primary air storage tank 10, a large amount of corn starch solution can be discharged through two-stage compressed air discharge, the secondary air discharge is small, the storage volume of the metering box 12 can be accurately controlled through secondary small-air discharge, and accurate calculation of corn starch feeding is facilitated.
In one embodiment, the primary air reservoir 10 has a volume of 80% -90% of the dosing tank 12 and the secondary air reservoir 11 has a volume of 30% -40% of the dosing tank 12.
The storage device can be a tank truck 1, a corn starch tank 2, preferably a horizontal tank, is arranged on the tank truck 1, a primary air inlet connector 3 and a secondary air inlet connector 4 are arranged at one end, close to the head, of the tank body, and a discharging connector 5 is arranged at the tail of the tank body. Preferably, the tank is provided with lifting lugs 6 for lifting the tank from the tanker 1 to a primary preparation and feeding platform 8 for cornstarch by a crane 7 for feeding the first preparation unit 200 and the second preparation unit 400. The corn starch is fed by adopting the tank truck 1, so that the transportation is convenient, and a user does not need to additionally arrange a corn starch storage system, thereby greatly reducing the occupied area and the investment of the user; moreover, the corn starch is fed by adopting a closed tank body and a pneumatic pipeline, so that the whole powder is fed without dust, thereby being environment-friendly and avoiding pneumoconiosis.
The primary preparation and feeding platform 8 is a platform for placing a tank body, and the components such as the primary preparation stirring tank 30, the secondary preparation stirring tank 40, the quantitative tank 12, the primary air storage tank 10, the secondary air storage tank 11, the first air compressor 9, and the second air compressor 25 may be placed on the primary preparation and feeding platform 8.
In one embodiment, the discharge device further comprises a weight measuring device placed under the dosing tank 12 for measuring the overall weight of the dosing tank 12. The accurate metering of the corn starch addition can be achieved by detecting the weight of the metering box 12 by a weight measuring device.
Further, preferably, the weight measuring device is a plurality of pressure gauges 19 disposed at the bottom of the quantitative tank 12, and the pressure gauges 19 are connected to a skirting bolt 20 of the quantitative tank 12 and connected to a support beam 22 of the quantitative tank 12 by bolts 21. The weight of the quantitative box 12 is accurately calculated through the pressure gauge 19, the metering is accurate, and the defect that the existing level gauge cannot accurately meter due to dust in the box can be avoided.
Of course, the present invention is not limited to the measurement method using a pressure gauge, and may be other weight measurement methods.
In the invention, the signals of the electric valve and the pressure gauge 19 on each connecting hose, the start and stop signals of the air pressure gauge and the variable frequency signals of the eccentric screw pump are all connected with the control box and are manually operated by the control room, so that the automatic control device has high automation degree, does not need to set site post workers, and reduces labor cost on the premise of avoiding site occupational diseases.
The corn starch tank body adopts two-stage compressed air discharge, the primary discharge air quantity is large, 80% -90% of the volume of the metering box can be fully stored, the storage quantity of the metering box 12 is precisely controlled by combining the secondary small-air quantity discharge with the metering of the pressure gauge 19, and the precise metering of corn starch feeding is realized.
The quantitative box 12 in the invention adopts compressed air batch discharge, has rapid and thorough discharge capacity, and is beneficial to saving the time of single discharge so as to realize rapid and repeated feeding operation.
Fig. 3 is a schematic flow chart of the method for preparing hematite inhibitor corn starch for reverse flotation according to the present invention, as shown in fig. 3, comprising the steps of:
step S1, conveying corn starch to a first preparation unit 200 through a feeding device 100;
step S2, providing a set amount of cold water to the first preparation unit 200 through the cold water providing device 300, and mixing the cold water and the corn starch in the first preparation unit 200 to form corn starch colloid;
step S3, delivering the corn starch colloid to a second preparation unit 400, providing a set amount of hot water to the second preparation unit 400 through a hot water providing device 500, and mixing the hot water and the corn starch colloid in the second preparation unit 400 to form a corn starch solution as a hematite inhibitor for reverse flotation.
Preferably, the first preparation unit 200 and the second preparation unit 400 are both prepared by mixing with stirring. The specific construction of the first preparation unit 200 and the second preparation unit 400 is substantially the same as that of the system for preparing hematite inhibitor corn starch for reverse flotation according to the present invention, and will not be described herein.
In one embodiment, the method of preparing further comprises: and S4, inputting steam into the second preparation unit 400 through a spiral steam pipeline 41, and carrying out heat preservation on the corn starch solution. The temperature is set to be 60-70 ℃, so that the precipitation of corn starch caused by the reduction of the temperature is avoided, and the quality of corn starch solution is further ensured. Adopts steam pipeline heat preservation, and steam pipeline equipartition is inboard in the cell body of secondary preparation stirred tank 40, and thermal efficiency is high, and the heat preservation is effectual.
In one embodiment, the step S1 includes:
storing compressed air to a primary air tank 10 and a secondary air tank 11 through a first air compressor 9;
compressed air in the primary air storage tank 10 is conveyed to a storage device through the primary air inlet connector 3, and corn starch in the storage device is discharged into the quantitative box 12 under the drive of the compressed air;
compressed air in the secondary air storage tank 11 is conveyed to a storage device through the secondary air inlet connector 4, and corn starch in the storage device is discharged into the quantitative box 12 under the drive of the compressed air;
when the corn starch in the quantitative tank 12 reaches a preset weight, the corn starch in the quantitative tank 12 is discharged to the first preparing unit 200 through the second air compressor 25.
Wherein the volume of the primary air storage tank 10 is 80% -90% of the quantitative box 12, and the volume of the secondary air storage tank 11 is 30% -40% of the quantitative box 12. The two-stage compressed air discharge is adopted, the primary discharge air quantity is large, 80-90% of the volume of the metering box can be fully stored, the storage quantity of the metering box 12 is precisely controlled by combining the secondary small-air quantity discharge with the metering of the pressure gauge 19, and the precise metering of corn starch feeding is realized.
The operation of the present invention will be described in detail with reference to the schematic structural diagram of the embodiment shown in fig. 2.
The feeding device 100 is fed by a tank. The tank truck 1 is opened into a corn starch preparation workshop and is suspended to a feeding platform 8 by a crane 7. The third discharge line 29 of the metering tank 12 is connected to the inlet 31 of the primary stirring tank 30. The air inlet pipe valves of the primary air storage tank 10 and the secondary air storage tank 11 are opened, the air outlet pipe valves of the primary air storage tank 10 and the secondary air storage tank 11 are closed, the first air compressor 9 is opened, and the primary air storage tank 10 and the secondary air storage tank 11 are filled with compressed air. Then the valve on the third feeding pipeline 17 of the quantitative box 12 is opened, the valve on the primary air inlet hose 13 of the tank body is firstly opened, the corn starch is discharged into the quantitative box 12 from the tank body under the drive of compressed air, and the air storage capacity of the primary air storage tank 10 can fill 80% -90% of the volume of the quantitative box. Then the valve on the secondary air inlet hose 14 of the tank body is opened, the volume of the secondary air storage tank 11 is small until the corn starch discharged into the quantitative tank 12 reaches quantitative weight through the detection of the pressure gauge 19, and the valve on the secondary air inlet hose 14 and the valve on the discharge pipe of the tank body are closed. Then the valve on the air inlet hose of the quantitative box 12 is opened, all materials in the quantitative box 12 are discharged into the corn starch one-time preparation stirring tank 30 under the drive of the second air compressor 25, and the feeding amount is controlled by the discharging times of the quantitative box 12.
Corn starch is prepared at one time. The first electric switching valve 32 on the cold water pipe is opened until the first flowmeter 33 detects that the fed cold water reaches the set value. The cold water and the corn starch form a homogeneous colloidal mixture under the action of stirring, and the corn starch content of the mixture is 20%. The electric switch valve and the eccentric screw pump on the discharge pipe are opened, and the corn starch colloid after being uniformly stirred is pumped to the secondary preparation stirring tank 40. The discharge speed can be controlled by controlling the frequency of the eccentric screw pump.
And (5) secondarily preparing corn starch. The second electric switch valve 38 on the hot water pipe is opened until the second flowmeter 39 detects that the fed hot water of 90-95 ℃ reaches the set value. Under the stirring action, the hot water and the corn starch are fully dissolved to form a corn starch solution, and the concentration of the corn starch solution is 3-5%. The prepared solution is subjected to heat preservation by the steam fed through a spiral steam pipe, and the heat preservation temperature is 60-70 ℃. An electric switch valve and an eccentric screw pump on the discharge pipe are opened, and the corn starch solution is pumped to a flotation dosing point. The discharge speed can be controlled by controlling the frequency of the eccentric screw pump.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A hematite inhibitor corn starch preparation system for reverse flotation, comprising: the feeding device and the preparation device are arranged on the same,
the feeding device is used for providing corn starch for the preparation device and comprises a material conveying device and a material discharging device, wherein the material conveying device comprises a storage device and is used for storing the corn starch;
the preparation device comprises: the device comprises a first preparation unit, a cold water supply device, a second preparation unit and a hot water supply device, wherein the cold water supply device is connected with the first preparation unit and is used for supplying cold water to the first preparation unit, the first preparation unit is also connected with a feeding device and is used for receiving corn starch supplied by the feeding device, and corn starch and cold water form a corn starch colloid in the first preparation unit;
the hot water supply device is connected with the second preparation unit and is used for supplying hot water to the second preparation unit, the second preparation unit is also connected with the first preparation unit and is used for receiving the corn starch colloid prepared by the first preparation unit, and the corn starch colloid and the hot water form a corn starch solution in the second preparation unit and are used as hematite inhibitor for reverse flotation;
the storage device is provided with a primary air inlet connector, a secondary air inlet connector and a discharge connector;
the discharging device comprises: the device comprises a first air compressor, a primary air storage tank, a secondary air storage tank, a second air compressor, a quantitative box and a weight measuring device; the volume of the primary air storage tank is 80% -90% of that of the quantitative tank, and the volume of the secondary air storage tank is 30% -40% of that of the quantitative tank;
the first air compressor is connected with a primary air storage tank and is used for storing compressed air to the primary air storage tank, the primary air storage tank is connected with the primary air inlet joint, the compressed air in the primary air storage tank enters the storage device through the primary air inlet joint, and corn starch in the storage device is discharged through the discharge joint;
the secondary air storage tank is connected with the first air compressor, compressed air is stored through the first air compressor, the secondary air storage tank is connected with the secondary air inlet joint, the compressed air in the secondary air storage tank enters the storage device through the secondary air inlet joint, and corn starch in the storage device is discharged through the discharge joint;
the quantitative box is characterized in that a third feeding pipeline is arranged on one side of the quantitative box and connected with the discharging connector, a third discharging pipeline is arranged on the other side of the quantitative box and connected with the first preparation unit;
the second air compressor is connected with the quantitative box and is used for discharging corn starch in the quantitative box to the first preparation unit;
the weight measuring device is arranged below the quantitative box and is used for measuring the whole weight of the quantitative box.
2. The hematite inhibitor corn starch preparation system for reverse flotation according to claim 1, wherein the first preparation unit comprises: the device comprises a primary preparation stirring tank, a first feeding pipeline, a first discharging pipeline and a first pumping device, wherein the primary preparation stirring tank is provided with a feeding port and a discharging port, the feeding port is arranged on the upper portion of the primary preparation stirring tank, the feeding port is connected with a feeding device through the first feeding pipeline, the discharging port is arranged on the lower portion of the primary preparation stirring tank and is connected with the first discharging pipeline, one end of the first discharging pipeline is connected with the discharging port, the other end of the first discharging pipeline is connected with the first pumping device, and the corn starch colloid is conveyed to the second preparation unit through the first pumping device.
3. The hematite inhibitor corn starch preparation system for reverse flotation according to claim 1 or 2, wherein the second preparation unit comprises: the device comprises a secondary preparation stirring tank, a second feeding pipeline, a second discharging pipeline and a second pumping device, wherein the second feeding pipeline is arranged on the upper portion of the secondary preparation stirring tank and connected with the first preparation unit, a spiral steam pipeline is arranged on the inner tank wall of the secondary preparation stirring tank, a steam inlet and a steam exhaust port are formed in the top of the secondary preparation stirring tank, the second discharging pipeline is arranged on the lower portion of the secondary preparation stirring tank and connected with the second pumping device, and the second pumping device is used for conveying corn starch solution formed by preparation.
4. The system for preparing the corn starch by using the hematite inhibitor for the reverse flotation according to claim 1, wherein the weight measuring device is a plurality of pressure gauges arranged at the bottom of the quantitative tank, and the pressure gauges are connected with a baseboard of the quantitative tank through bolts and are connected with a supporting beam of the quantitative tank.
5. The preparation method of the hematite inhibitor corn starch for reverse flotation is characterized by comprising the following steps of:
step S1, conveying corn starch to a first preparation unit through a feeding device; comprising the following steps: compressed air is stored in the primary air storage tank and the secondary air storage tank through a first air compressor; compressed air in the primary air storage tank is conveyed to the storage device through the primary air inlet connector, and corn starch in the storage device is discharged into the quantitative box under the drive of the compressed air; compressed air in the secondary air storage tank is conveyed to the storage device through the secondary air inlet connector, and corn starch in the storage device is discharged into the quantitative box under the driving of the compressed air; after the corn starch in the quantitative box reaches the preset weight, discharging the corn starch in the quantitative box to a first preparation unit through a second air compressor;
step S2, providing a set amount of cold water to a first preparation unit through a cold water providing device, and mixing the cold water and corn starch in the first preparation unit to form corn starch colloid;
and S3, conveying the corn starch colloid to a second preparation unit, providing a set amount of hot water for the second preparation unit through a hot water providing device, and mixing the hot water and the corn starch colloid in the second preparation unit to form a corn starch solution serving as a hematite inhibitor for reverse flotation.
6. The method for preparing hematite inhibitor corn starch for reverse flotation according to claim 5, wherein the preparation method further comprises:
and S4, inputting steam into the second preparation unit through a spiral steam pipeline, and preserving heat of the corn starch solution.
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| GB1182453A (en) * | 1966-02-24 | 1970-02-25 | Cpc International Inc | Process and Apparatus for Preparing Adhesive Compositions |
| CN106110948A (en) * | 2016-08-28 | 2016-11-16 | 浙江景兴纸业股份有限公司 | A kind of system that can control starch solution concentration |
| CN205925529U (en) * | 2016-07-19 | 2017-02-08 | 中蓝连海设计研究院 | A device for preparing starch inhibitor |
| CN206980601U (en) * | 2017-07-31 | 2018-02-09 | 荆州市九天化工科技有限公司 | A kind of starch dissolution device |
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2020
- 2020-08-04 CN CN202010770107.XA patent/CN111925454B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1182453A (en) * | 1966-02-24 | 1970-02-25 | Cpc International Inc | Process and Apparatus for Preparing Adhesive Compositions |
| CN205925529U (en) * | 2016-07-19 | 2017-02-08 | 中蓝连海设计研究院 | A device for preparing starch inhibitor |
| CN106110948A (en) * | 2016-08-28 | 2016-11-16 | 浙江景兴纸业股份有限公司 | A kind of system that can control starch solution concentration |
| CN206980601U (en) * | 2017-07-31 | 2018-02-09 | 荆州市九天化工科技有限公司 | A kind of starch dissolution device |
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