CN108249465B - Production equipment and production process for preparing calcium hydroxide by using carbide slag - Google Patents
Production equipment and production process for preparing calcium hydroxide by using carbide slag Download PDFInfo
- Publication number
- CN108249465B CN108249465B CN201810063432.5A CN201810063432A CN108249465B CN 108249465 B CN108249465 B CN 108249465B CN 201810063432 A CN201810063432 A CN 201810063432A CN 108249465 B CN108249465 B CN 108249465B
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- calcium hydroxide
- carbide slag
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- feeder
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- 239000002893 slag Substances 0.000 title claims abstract description 86
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title claims abstract description 76
- 239000000920 calcium hydroxide Substances 0.000 title claims abstract description 76
- 229910001861 calcium hydroxide Inorganic materials 0.000 title claims abstract description 76
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 122
- 239000000463 material Substances 0.000 claims abstract description 116
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 61
- 238000005096 rolling process Methods 0.000 claims abstract description 48
- 238000006243 chemical reaction Methods 0.000 claims abstract description 44
- 230000029087 digestion Effects 0.000 claims abstract description 33
- 239000002245 particle Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 14
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 62
- 239000000292 calcium oxide Substances 0.000 claims description 31
- 235000012255 calcium oxide Nutrition 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 28
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 22
- 239000004575 stone Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 7
- 239000011574 phosphorus Substances 0.000 claims description 7
- 229910052698 phosphorus Inorganic materials 0.000 claims description 7
- 229910052709 silver Inorganic materials 0.000 claims description 7
- 239000004332 silver Substances 0.000 claims description 7
- 239000011593 sulfur Substances 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 235000013312 flour Nutrition 0.000 claims description 6
- 238000005282 brightening Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000011358 absorbing material Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000002087 whitening effect Effects 0.000 claims description 2
- 238000000053 physical method Methods 0.000 abstract description 5
- 235000011116 calcium hydroxide Nutrition 0.000 description 47
- 239000000126 substance Substances 0.000 description 4
- 239000005997 Calcium carbide Substances 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/02—Oxides or hydroxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/18—Carbonates
-
- 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
Abstract
The invention relates to calcium hydroxide production equipment and a production process thereof, in particular to production equipment and a production process for preparing calcium hydroxide by using carbide slag. The physical method is adopted to prepare the calcium hydroxide, so that the method is more energy-saving and environment-friendly. The device specifically comprises a proportioning bin, a first rolling feeder, a second rolling feeder, a pair-wheel rolling machine, a first screw conveyor, a reaction kettle, a liquid proportioning device, a digestion device, a lifting machine, a calcium hydroxide collector, a calcium carbonate particle collector, a first fan, a second fan, a sorting machine, a second screw conveyor, a pulverizer, a receiver, a calcium hydroxide finished product bin and a calcium carbonate finished product bin. The proportioning bin is connected with the rolling machine through a feeder, the rolling machine is connected with the digestion device through a book end, and the materials enter the sorting machine after entering the lifting machine through the digestion device and are divided into calcium hydroxide and calcium carbonate particles.
Description
Technical Field
The invention relates to calcium hydroxide production equipment and a production process thereof, in particular to production equipment and a production process for preparing calcium hydroxide by using carbide slag.
Background
The carbide slag is industrial waste generated by the hydrolysis of calcium carbide in an acetylene generator, namely, the residue of the hydrolysis of calcium carbide, which is mainly derived from the production of chemical products such as polyvinyl chloride (PVC) acetylene, polyvinyl alcohol and the like. The main chemical components are Ca (OH) 2 (more than 85% by mass) and SiO2, A12O3, ft2O3, caSO4 and the like, and the chemical components are basically the same as the slaked lime. The carbide slag is strong in alkalinity and severely pollutes the environment, and if not in time, the carbide slag occupies a large amount of land, severely pollutes the environment and endangers human health.
At present, the utilization paths of carbide slag mainly comprise: producing cement building materials, producing chemical products and performing landfill. But the cement production has larger specification, too much investment and complex process. And landfill and stacking processes cause serious pollution to the natural environment. Therefore, the recycling of carbide slag is a serious problem for solving the secondary pollution at present.
Therefore, the simple and effective technological method and special equipment provided by the inventor utilize low-cost carbide slag as a main raw material, and the method for preparing the desulfurizing agent (calcium hydroxide) of the thermal power plant and the special equipment thereof.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides production equipment and production process for preparing calcium hydroxide by using carbide slag, which adopts a physical method to prepare calcium hydroxide, and is more energy-saving and environment-friendly.
The invention adopts the following technical scheme that the device comprises a proportioning bin, a first rolling feeder, a second rolling feeder, a pair-wheel rolling machine, a first screw conveyor, a reaction kettle, a liquid proportioning device, a digestion device, a lifting machine, a calcium hydroxide collector, a calcium carbonate particle collector, a first fan, a second fan, a sorting machine, a second screw conveyor, a pulverizer, a receiver, a calcium hydroxide finished product bin and a calcium carbonate finished product bin.
The proportioning bin comprises two components: carbide slag proportioning bin and raw stone powder proportioning bin; the carbide slag proportioning bin is internally provided with carbide slag, and the raw stone powder proportioning bin is internally provided with quicklime; the bottom of the carbide slag proportioning bin is provided with a rolling feeder I with controllable feeding quantity, and the rolling feeder I is connected with an inlet of the pair of wheel rolling machines; and a rolling feeder II is arranged at the bottom of the raw stone powder proportioning bin and is connected with the inlet of the pair of wheel rolling machines through the rolling feeder II.
The outlet of the pair of wheel rolling machines is detachably connected with an inlet of the screw conveyor, the outlet of the screw conveyor is connected with an inlet of the reaction kettle, the reaction kettle is also communicated with a liquid proportioner, and the sulfur removing agent, the phosphorus removing agent and the silver light brightening agent are conveyed into the reaction kettle through the liquid proportioner.
The discharge port of the reaction kettle is connected with the inlet of the digestion device, the discharge port of the digestion device is connected with the feeding port of the lifter, the discharge port of the lifter is vertically opposite to the inlet of the separator above the discharge port of the lifter, and the discharge port of the lifter is not contacted with the inlet of the separator.
The discharge gate of sorter is linked together with the calcium hydroxide collector, and the export of this calcium hydroxide collector links to each other with fan one entry, and this fan one export is linked together with calcium hydroxide finished product feed bin.
The slag removing port of the separator is communicated with a calcium carbonate particle collector, the outlet of the calcium carbonate particle collector is connected with a second screw conveyor, the outlet of the second screw conveyor is positioned above the feeding port of the pulverizer and vertically opposite to the feeding port of the pulverizer, and the discharging port of the pulverizer feeds materials into a calcium carbonate finished product bin through a second fan and a receiver (the second fan is connected with the inlet of the calcium carbonate finished product bin through the receiver).
And a discharge valve is respectively arranged at the outlet of the calcium hydroxide finished product bin and the outlet of the calcium carbonate finished product bin.
As a preferable scheme of the invention, the first feeder is detachably connected with the bottom of the carbide slag proportioning bin through a flange, and the second feeder is detachably connected with the bottom of the raw stone powder proportioning bin through a flange.
As another preferable scheme of the invention, the first feeder and the second feeder have the same structure and comprise a feed hopper, an operation part and a discharge hopper, wherein the feed hopper is detachably connected with a proportioning bin through a flange, and the discharge hopper is detachably connected with a wheel mill through a flange; the feeding hopper, the operating part and the discharging hopper are sequentially connected from top to bottom, and the operating part is respectively communicated with the feeding hopper and the discharging hopper; the operation part comprises a stirring shaft which transversely penetrates through the operation part shell, one end of the stirring shaft extends out of the shell, and a handle which is convenient to grasp is arranged at the extending end part of the stirring shaft, and the handle is manually operated or driven by a driving motor; the stirring shaft is connected with the shell through a bearing; 5 sheet-shaped blades are arranged in the shell and the stirring shaft at equal intervals along the radial direction, the sections of the 5 blades form a star-shaped structure, and gaps are reserved between the blades and the inner wall of the shell.
As another preferable mode of the invention, the clearance between the blade and the inner wall of the shell is 0.5-3 mm.
As another preferred scheme of the invention, the bottom flange of the pair of wheel rolling machines is connected with the inlet flange of the first screw conveyor and is fastened by screws.
As another preferable scheme of the invention, the discharge hole of the elevator is higher than the inlet of the separator, and the distance between the discharge hole of the elevator and the inlet of the separator is 150cm.
As another preferable scheme of the invention, the distance between the two screw conveyors and the feed inlet of the pulverizer is 100cm.
As another preferable scheme of the invention, a stirring blade is arranged in the reaction kettle, and a powder metal magnetic block for absorbing materials is arranged on the stirring blade; the reaction kettle is provided with a jacket layer, and the jacket layer is internally provided with a thermocouple heating rod and heat conducting oil, so that the reaction kettle can be heated at any time according to the material condition.
As another preferable scheme of the invention, after the materials are separated by a separator, two products are separated, wherein one product is an industrial calcium hydroxide product, and the other product is a calcium carbonate material with different specifications; the industrial calcium hydroxide product is sent into a calcium hydroxide finished product bin through a first fan, and calcium carbonate materials enter a pulverizer from a slag removing port at the bottom of the separator.
The production equipment and the production process for preparing the calcium hydroxide by using the carbide slag comprise the following steps.
Step 1, selecting materials: selecting carbide slag and quicklime; and the CaO content (mass content) in the quicklime is more than 85 percent. (the degree of charge is within 4-6 cm.)
Step 2, feeding: and adding carbide slag into a carbide slag proportioning bin, and adding quicklime into a raw stone powder proportioning bin.
Step 3, batching: and starting the first feeder and the second feeder, and conveying the carbide slag and the quicklime to a roller mill for rolling.
And step 4, rolling: starting a wheel mill, mixing and initially pressing the materials, rolling the naturally agglomerated carbide slag and raw stone blocks into powdery materials with the diameter of less than 0-3 mm, feeding the rolled materials into a first screw conveyor, and conveying the materials into a reaction kettle through the first screw conveyor; after the materials enter a reaction kettle, stirring the materials in the reaction kettle, and simultaneously adding additives through a liquid proportioner, wherein the additives comprise a sulfur removing agent, a phosphorus removing agent and a silver light brightening agent; (when the material is stirred, water in the carbide slag can react with quicklime to generate a certain amount of gas, and the gas can take away part of elements contained in the material.) the reacted material enters a digestion device.
Step 5, digestion: and the materials entering the digestion device are digested, and enter the elevator through the discharge opening after being completely digested.
Step 6, lifting materials and sorting: along with the operation of the elevator, the materials are lifted to the feeding port of the sorting machine by the elevator, and after the materials enter the sorting machine, the sorting machine sorts the materials.
Step 7, separating a product: separating two products by a separator, wherein one product is calcium hydroxide and the other product is calcium carbonate particles; separating calcium carbonate, feeding the calcium carbonate into a calcium carbonate particle collector, feeding the calcium carbonate into a pulverizer through a second screw conveyor, and grinding the calcium carbonate into more than 200 meshes (the separation ratio is 1:0.2 (taking t as a unit)); the separated calcium hydroxide enters a first fan (Roots blower) from a calcium hydroxide collector, the first fan blows the finished product material into a calcium hydroxide finished product bin, and the separated calcium carbonate is blown into the calcium carbonate finished product bin by a second fan (blower) and a material collector after being ground.
Preferably, in the step 1, the water content of the selected carbide slag is 1-35%, and the mass ratio of the carbide slag to the quicklime is 2:1 (in tons).
Preferably, in the step 3, the rotation number ratio of the first feeder to the second feeder is 2:1.
Compared with the prior art, the invention has the beneficial effects.
Compared with the prior art, the invention has the following advantages: the prior art adopts dehydration, wind drying, coal burning and electric heating to prepare, and the production process of the invention has no secondary emission and pollution, is prepared by a physical method, and absorbs the water in the carbide slag to between 1.5 and 2 percent in a short time.
Compared with the prior art, the invention has the following advantages: the prior process technology has complex process and higher production cost, such as dehydration process and wind-force drying and overheating treatment process, and the production cost of the technology is reduced by 30-50% between 150 and 200 yuan compared with the prior production cost.
The invention can treat partial metal impurities in the material stirring process and discharge some nonmetallic materials along with the increase of the material temperature.
The invention adopts a complete set of sealing process and automatic operation, thereby realizing clean, environment-friendly and no secondary pollution.
Drawings
The invention is further described below with reference to the drawings and the detailed description. The scope of the present invention is not limited to the following description.
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic diagram of the structure of the feeder (feeder one or feeder two) according to the present invention.
FIG. 3 is a schematic illustration of the attachment of the feeder blade to the agitator shaft of the present invention.
Fig. 4 is a top view of fig. 1.
In the figure, 1 is a carbide slag proportioning bin, 2 is a raw stone powder proportioning bin, 3 is a feeder II, 4 is a feeder I, 5 is a pair of wheel mills, 6 is a screw conveyor I, 7 is a reaction kettle, 8 is a digestion device, 9 is a liquid proportioning device, 10 is a lifting machine, 11 is a sorting machine, 12 is a calcium hydroxide collector, 13 is a fan I, 14 is a calcium carbonate particle collector, 15 is a screw conveyor II, 16 is a flour mill, 17 is a fan II, 18 is a receiver, 19 is a calcium hydroxide finished product bin, 20 is a discharge valve, 21 is a calcium carbonate finished product bin, 22 is a feed hopper, 23 is a stirring shaft, 24 is an operation part, 25 is a discharge hopper, and 26 is a blade.
Detailed Description
Referring to fig. 1 to 4, the invention comprises a proportioning bin, a first rolling feeder 4, a second rolling feeder 3, a pair roller 5, a first screw conveyor 6, a reaction kettle 7, a liquid proportioning device 9, a digestion device 8, a lifting machine 10, a calcium hydroxide collector 12, a calcium carbonate particle collector 14, a first fan 13, a second fan 17, a sorting machine 11, a second screw conveyor 15, a grinding mill 16, a receiver 18, a calcium hydroxide finished product bin 19 and a calcium carbonate finished product bin 21.
The proportioning bin comprises two components: carbide slag proportioning bin 1 and raw stone powder proportioning bin 2; the carbide slag proportioning bin 1 is internally provided with carbide slag, and the raw stone powder proportioning bin 2 is internally provided with quicklime; the bottom of the carbide slag proportioning bin 1 is provided with a rolling feeder I4 with controllable feeding quantity, and the rolling feeder I4 is connected with an inlet of a pair of wheel rolling machines 5; the bottom of the raw stone powder proportioning bin 2 is provided with a rolling feeder II 3, and the rolling feeder II 3 is connected with the inlet of the wheel mill 5.
The outlet of the pair of wheel rolling machines 5 is detachably connected with the inlet of the first screw conveyor 6, the outlet of the first screw conveyor 6 is connected with the inlet of the reaction kettle 7, the reaction kettle 7 is also communicated with a liquid proportioner 9, and the sulfur removing agent, the phosphorus removing agent and the silver light brightening agent are conveyed into the reaction kettle 7 through the liquid proportioner 9.
The discharge gate of reation kettle 7 links to each other with the entry of digestion device 8, digestion device 8's discharge gate links to each other with lifting machine 10 pan feeding mouth, and this lifting machine 10's discharge gate and sorter 11 entry are located lifting machine 10 discharge gate top and vertical relatively, and lifting machine 10 discharge gate and sorter 11 entry do not contact.
The discharge gate of sorter 11 is linked together with calcium hydroxide collector 12, and the export of this calcium hydroxide collector 12 links to each other with fan one 13 inlets, and this fan one 13 export is linked together with calcium hydroxide finished product feed bin 19.
The deslagging material opening of the separator 11 is communicated with a calcium carbonate particle collector 14, the outlet of the calcium carbonate particle collector 14 is connected with a second screw conveyor 15, the outlet of the second screw conveyor 15 is positioned above the material inlet of the pulverizer 16 and vertically opposite to the material inlet, the material outlet of the pulverizer 16 sends the material into a calcium carbonate finished product bin 21 through a second fan 17 and a material receiver 18 (the second fan 17 is connected with the inlet of the calcium carbonate finished product bin 21 through the material receiver 18; the second fan 17 is connected with the inlet of the calcium carbonate finished product bin 21); and a discharge valve 20 is arranged at the outlet of the calcium hydroxide finished product bin 19 and the outlet of the calcium carbonate finished product bin 21 respectively. The cyclone type material receiving device 18 is selected as the material receiving device 18, and adopts cyclone type material receiving, and the material falls into the bottom of the material bin through rotation, so that the material is more uniform.
Preferably, the first feeder 4 is detachably connected with the bottom of the carbide slag proportioning bin 1 through a flange, and the second feeder 3 is detachably connected with the bottom of the raw stone powder proportioning bin 2 through a flange.
Preferably, the first feeder 4 and the second feeder 3 have the same structure, as shown in fig. 2-4, and include a feeding hopper 22, an operation portion 24, and a discharging hopper 25, where the feeding hopper 22 is detachably connected to the proportioning bin through a flange, and the discharging hopper 25 is detachably connected to the counter roller 5 through a flange; the feed hopper 22, the operation part 24 and the discharge hopper 25 are sequentially connected from top to bottom, and the operation part 24 is respectively communicated with the feed hopper 22 and the discharge hopper 25; the operation part 24 comprises a stirring shaft 23 which transversely penetrates through the shell of the operation part 24, one end of the stirring shaft 23 extends out of the shell, and the extending end is provided with a handle which is convenient to hold, and the handle is manually operated or driven by a driving motor; the stirring shaft 23 is connected with the shell through a bearing; in the shell, the stirring shaft 23 is provided with 5 sheet-shaped blades 26 at equal intervals along the radial direction, the sections of the 5 blades 26 form a star-shaped structure, and gaps are reserved between the blades 26 and the inner wall of the shell. The clearance between the blade 26 and the inner wall of the housing is 0.5-3 mm. The material gets into operating portion 24 by feeder hopper 22, and motor drive (mixing) shaft 23 rotates, drives blade 26 rotation, and in blade 26 rotation in-process, the material drops out hopper 25 from operating portion 24, and the motor rotates at the uniform velocity, then the material is evenly by the ejection of compact fill 25 ejection of compact.
Preferably, the bottom flange of the pair of wheel rollers 5 is connected with the inlet flange of the screw conveyor one 6 and fastened by screws.
Preferably, the discharge hole of the lifting machine 10 is higher than the inlet of the separator 11, and the distance between the discharge hole of the lifting machine 10 and the inlet of the separator 11 is 150cm.
Preferably, the distance between the second screw conveyor 15 and the feed inlet of the pulverizer 16 is 100cm.
Preferably, a stirring blade 26 is arranged in the reaction kettle 7, and a powder metal magnetic block for absorbing materials is arranged on the stirring blade 26; the reaction kettle 7 is provided with a jacket layer, and a thermocouple heating rod and heat conducting oil are arranged in the jacket layer, so that the reaction kettle can be heated at any time according to the material condition.
Preferably, after the materials are separated by a separator 11, two products are separated, wherein one product is an industrial calcium hydroxide product, and the other product is a calcium carbonate material with different specifications; the industrial calcium hydroxide product is sent into a calcium hydroxide finished product bin 19 through a first fan 13, and calcium carbonate materials enter a pulverizer 16 from a deslagging port at the bottom of the separator 11.
The production equipment and the production process for preparing the calcium hydroxide by using the carbide slag comprise the following steps.
Step 1, selecting materials: selecting carbide slag and quicklime; and the CaO content in the quicklime is more than 85 percent. (the degree of charge is within 4-6 cm.)
Step 2, feeding: the carbide slag is added into a carbide slag proportioning bin 1, and the quicklime is added into a raw stone powder proportioning bin 2.
Step 3, batching: and starting the first feeder 4 and the second feeder 3, and conveying the carbide slag and the quicklime to the wheel mill 5 for rolling through the first feeder 4 and the second feeder 3.
And step 4, rolling: starting a wheel rolling machine 5, mixing and initially pressing the materials, rolling naturally-agglomerated carbide slag and raw stone blocks into powdery materials with the particle size of less than 0-3 mm, conveying the rolled materials into a first screw conveyor 6, and conveying the materials into a reaction kettle 7 through the first screw conveyor 6; after the materials enter the reaction kettle 7, stirring the materials in the reaction kettle 7, and simultaneously adding additives through a liquid proportioner 9, wherein the additives comprise a sulfur removing agent, a phosphorus removing agent and a silver light brightening agent; (when the material is stirred, water in the carbide slag can react with quicklime to generate a certain amount of gas, and the gas can take away part of elements contained in the material.) the reacted material enters a digestion device 8.
Step 5, digestion: the material entering the digestion device 8 is digested, and enters the elevator 10 through the discharge opening after being completely digested.
Step 6, lifting materials and sorting: along with the operation of the elevator 10, the materials are lifted to the feed inlet of the separator 11 by the elevator 10, and after the materials enter the separator 11, the separator 11 sorts the materials.
Step 7, separating a product: separating two products by a separator 11, wherein one product is calcium hydroxide and the other product is calcium carbonate particles; the calcium carbonate is separated and enters a calcium carbonate particle collector 14, and is sent into a flour mill 16 to be ground into more than 200 meshes through a screw conveyor II 15 (the separation ratio is 1:0.2 (taking t as a unit)); the separated calcium hydroxide enters a first fan 13 from a calcium hydroxide collector 12, the first fan 13 (Roots blower) blows the finished product into a calcium hydroxide finished product bin 19, and the separated calcium carbonate is ground and then blown into a calcium carbonate finished product bin 21 by a second fan 17 (blower) and a receiver 18.
Preferably, in the step 1, the water content of the selected carbide slag is 1-35%, and the mass ratio of the carbide slag to the quicklime is 2:1 (in tons).
Preferably, in the step 3, the rotation number ratio of the first feeder 4 to the second feeder 3 is 2:1. This design is more conducive to subsequent digestion.
As a specific example, fig. 1 shows.
1. The bottom of the carbide slag and quicklime batching cabin is provided with two rolling feeders capable of controlling feeding, the purpose is to reasonably mix materials, flanges at the upper parts of the two rolling feeders are connected with flanges at the bottom of the cabin by screws, and rubber pads are arranged between the flanges as sealing.
2. The flange at the upper part of the wheel mill 5 is connected with the flange at the lower part of the control feeder by screws (the connection distance is 50 cm).
3. The bottom flange of the wheel mill 5 is connected with the inlet flange of the screw conveyor and fastened by screws (the distance between the discharge opening of the wheel mill and the inlet of the screw conveyor is 100 cm).
4. The screw conveyor is downwards arranged at the outlet of the reaction kettle 7. And starting the stirrer to start stirring, and controlling the rotating speed at 25 ypm-30 ypm. The residence time of the materials in the reaction kettle 7 is controlled to be 20-25 minutes. The electric heating couple heating rods and the heat pouring oil are arranged at the two sides of the reaction kettle 7 according to the jacket layers, and the electric heating couple heating rods and the heat pouring oil can be heated at any time according to the material conditions, and the sulfur removal agent, the phosphorus removal agent and the silver light whitening agent are conveyed into the reaction kettle 7.
5. The butt joint distance between the front inlet of the digestion device 8 and the discharge port at the tail part of the reaction kettle 7 is 5cm, the bottom of the digestion device 8 is U-shaped, and a screw conveyor can be arranged.
6. The discharging opening at the tail of the digestion device 8 is directly connected with the feeding opening of the lifting machine 10, and the lifting machine 10 runs upwards.
7. The material outlet of the lifting machine 10 is directly opposite to the inlet of the sorting machine 11 (but is not connected with the inlet) of the lifting machine 10, and the outlet is 150cm higher than the inlet of the sorting machine 11.
8. The finished product inlet of the separator 11 is directly Luo Ci blower inlet, the Roots blower outlet is connected with the finished product bin, the slag removing inlet of the separator 11 is directly connected with the feed inlet of the pulverizer 16, and the slag removing inlet is 100cm away from the feed inlet of the pulverizer 16.
9. The outlet of the mill 16 feeds the material to a finished product bin via a fan.
The production equipment and the production process for preparing the calcium hydroxide by adopting a physical method are realized through the following steps.
1. Selecting materials.
The carbide slag is prepared, the content of the carbide slag is measured at the same time, and the content of the quicklime is more than 85 percent, and the feeding degree is within 4-6 mm. If the carbide slag contains 30% of water, the following weight is adopted: 1 (in tons).
2. And (5) feeding materials.
And (5) respectively pouring carbide slag and quicklime into the proportioning bins by using a forklift.
3. And (5) batching.
The adjustable control feeder is started. And determining the revolution of the controller, reasonably mixing, and enabling the carbide slag and the quicklime after mixing to enter a rolling machine.
4. And (5) rolling.
And starting the wheel mill 5 to initially press the mixed materials, so that the naturally agglomerated carbide slag (4-6 cm) and the raw stone blocks are rolled into powdery materials with the diameter of less than 0-3 mm, and the rolled materials enter a screw conveyor, and the screw conveyor sends the materials to the reaction kettle 7. After the materials enter the reaction kettle 7, stirring is carried out, the stirring port blades 26 are provided with strong magnetic blocks, metallic iron in the materials is fully absorbed, additives are added at the same time, when the materials are stirred, water in carbide slag can react with quicklime to generate a certain amount of gas, the gas can take away part of elements contained in the materials, and the reacted materials enter the digestion device 8.
5. Secondary digestion
The material entering the digestion device 8 is digested again, and enters the elevator 10 through the discharge opening after being completely digested.
6. Lifting materials and sorting.
Along with the operation of the elevator 10, the materials are lifted to a top feed inlet of the separator 11, and after the materials enter the separator 11, the separator 11 sorts the materials.
7. Separating the product.
Separating two products by a separator 11, wherein one product is calcium hydroxide and the other product is calcium carbonate; after the calcium carbonate is separated, the calcium carbonate is sent into a flour mill 16 by a screw conveyor to be ground into a finished product with more than 200 meshes. The separation ratio is 1:0.2 (in t). The calcium hydroxide product index is shown in Table 3. The calcium carbonate product index is shown in Table 4.
The separated calcium hydroxide product enters a Roots blower from a finished calcium hydroxide collector 12, the Roots blower blows finished product materials into a calcium hydroxide finished product bin 19 for sale, and the separated calcium carbonate is blown into a calcium carbonate finished product bin 21 for sale by a blower after being ground.
Specifically, the present invention relates to a method for manufacturing a semiconductor device.
1. The waste solid carbide slag is used as a main production raw material, and is reasonably mixed according to the actual water content (sampling test) of the carbide slag (for example, the water content of the carbide slag is 30 percent, and the proportion is 1t of calcium carbide and 0.3t of quicklime).
2. And pouring the carbide slag and the quicklime into a proportioning bin for proportioning.
3. And respectively mixing the carbide slag and the quicklime in proportion by controlling a feeder.
4. The materials are fed to a pair of roller mills 5 at a uniform speed by a controllable feeder during mixing, and the roller mills are operated to roll stones which are stored in the materials and are unequal into fine powder particles with the particle size of less than 3mm, so that all the materials are in powder with the particle size of 0-3 mm.
5. The rolled material is sent to an inlet of a screw conveyor, and the screw conveyor sends the powdery material to a feed inlet at the upper part of a reaction kettle 7.
6. After entering the post reactor, the mixture is stirred for 20-25 minutes and then sent to a digestion device 8.
7. After the material is digested for the first time by the reaction kettle 7, a discharge opening at the bottom of the reaction kettle 7 enters a digestion device 8 for digestion again.
8. The completely digested material is sent to a feed port of a lifting machine 10 through a discharge port at the bottom of a digestion device 8, and then the material is evenly and quickly sent to the feed port at the top of a sorting machine 11 through the lifting machine 10 for sorting.
9. After the material is separated by the separator 11, two products are separated, wherein one product is industrial calcium hydroxide product (see table 3), and the other product is calcium carbonate material with different specifications.
(1) The former is separated calcium hydroxide product Ca (OH) 2 Feeding the material from the bottom discharge opening of the separator 11 into a secondary fanThe inlet is sent to a finished product storage bin for sale through a Luo Ci fan.
(2) The other separated calcium carbonate particles with different sizes are sent into a flour mill 16 by a screw conveyor to be ground into calcium carbonate finished product powder with more than 200 meshes (see table 4) and sent into a finished product bin by a blower for sale.
The carbide slag formation component, particle size and the index after preparation are shown in tables 1 to 4 below.
The invention adopts the simplest physical method and solves several problems in the reutilization of carbide slag.
1. Solves the difficult problems of too much carbide slag water and bad operation.
2. Solves the problem of natural agglomeration due to uneven granularity of carbide slag.
3. Solves the problems of carbide slag preparation and too low calcium hydroxide content.
4. Solves the problem of preparing calcium hydroxide from carbide slag.
It should be understood that the foregoing detailed description of the present invention is provided for illustration only and is not limited to the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention may be modified or substituted for the same technical effects; as long as the use requirement is met, the invention is within the protection scope of the invention.
Claims (8)
1. The production equipment for preparing the calcium hydroxide by using the carbide slag comprises a proportioning bin, a first rolling feeder, a second rolling feeder, a pair-wheel rolling machine, a first screw conveyor, a reaction kettle, a liquid proportioning device, a digestion device, a lifting machine, a calcium hydroxide collector, a calcium carbonate particle collector, a first fan, a second fan, a sorting machine, a second screw conveyor, a pulverizer, a receiver, a calcium hydroxide finished product bin and a calcium carbonate finished product bin; it is characterized in that the method comprises the steps of,
the proportioning bin comprises two components: carbide slag proportioning bin and raw stone powder proportioning bin; the carbide slag proportioning bin is internally provided with carbide slag, and the raw stone powder proportioning bin is internally provided with quicklime; the bottom of the carbide slag proportioning bin is provided with a rolling feeder I with controllable feeding quantity, and the rolling feeder I is connected with an inlet of the pair of wheel rolling machines; the bottom of the raw stone powder proportioning bin is provided with a rolling feeder II which is connected with the inlet of the pair of wheel rolling machines;
the outlet of the pair of wheel rolling machines is detachably connected with an inlet of a screw conveyor I, the outlet of the screw conveyor I is connected with an inlet of a reaction kettle, the reaction kettle is also communicated with a liquid proportioner, and a sulfur removing agent, a phosphorus removing agent and a silver light whitening agent are conveyed into the reaction kettle through the liquid proportioner;
the discharge port of the reaction kettle is connected with the inlet of the digestion device, the discharge port of the digestion device is connected with the feed port of the lifter, the discharge port of the lifter is vertically opposite to the inlet of the separator above the discharge port of the lifter, and the discharge port of the lifter is not contacted with the inlet of the separator;
the discharge port of the separator is communicated with a calcium hydroxide collector, the outlet of the calcium hydroxide collector is connected with an inlet of a first fan, and the outlet of the first fan is communicated with a calcium hydroxide finished product bin;
the slag removing material port of the separator is communicated with a calcium carbonate particle collector, the outlet of the calcium carbonate particle collector is connected with a second screw conveyor, the second screw conveyor outlet is positioned above the feeding port of the pulverizer and vertically opposite to the feeding port of the pulverizer, and the discharging port of the pulverizer feeds materials into a calcium carbonate finished product bin through a second fan and a receiver;
the calcium hydroxide finished product bin outlet and the calcium carbonate finished product bin outlet are respectively provided with a discharge valve;
a stirring blade is arranged in the reaction kettle, and a powder metal magnetic block for absorbing materials is arranged on the stirring blade; the reaction kettle is provided with a jacket layer, and a thermocouple heating rod and heat conducting oil are arranged in the jacket layer, so that the reaction kettle can be heated at any time according to the material conditions;
the first feeder and the second feeder have the same structure and comprise a feed hopper, an operation part and a discharge hopper, wherein the feed hopper is detachably connected with the proportioning bin through a flange, and the discharge hopper is detachably connected with the wheel mill through a flange; the feeding hopper, the operating part and the discharging hopper are sequentially connected from top to bottom, and the operating part is respectively communicated with the feeding hopper and the discharging hopper; the operation part comprises a stirring shaft which transversely penetrates through the operation part shell, one end of the stirring shaft extends out of the shell, and a handle which is convenient to grasp is arranged at the extending end part of the stirring shaft, and the handle is manually operated or driven by a driving motor; the stirring shaft is connected with the shell through a bearing; 5 sheet-shaped blades are arranged in the shell and the stirring shaft at equal intervals along the radial direction, the sections of the 5 blades form a star-shaped structure, and gaps are reserved between the blades and the inner wall of the shell.
2. The production equipment for preparing calcium hydroxide by using carbide slag according to claim 1, wherein: the first feeder is detachably connected with the bottom of the carbide slag proportioning bin through a flange, and the second feeder is detachably connected with the bottom of the raw stone powder proportioning bin through a flange.
3. The production equipment for preparing calcium hydroxide by using carbide slag according to claim 1, wherein: the bottom flange of the pair of wheel rolling machine is connected with the inlet flange of the first screw conveyor and is fastened by screws.
4. The production equipment for preparing calcium hydroxide by using carbide slag according to claim 1, wherein: the elevator discharge gate is higher than the sorter entry and elevator discharge gate and sorter entry interval be 150cm.
5. The production equipment for preparing calcium hydroxide by using carbide slag according to claim 1, wherein: the feeding hole of the spiral conveyor is 100cm away from the feeding hole of the flour mill.
6. The production equipment for preparing calcium hydroxide by using carbide slag according to claim 1, wherein: separating two products after the materials are separated by a separator, wherein one product is an industrial calcium hydroxide product, and the other product is a calcium carbonate material with different specifications; the industrial calcium hydroxide product is sent into a calcium hydroxide finished product bin through a first fan, and calcium carbonate materials enter a pulverizer from a slag removing port at the bottom of the separator.
7. The production equipment for preparing calcium hydroxide by using carbide slag according to claim 1, wherein: the clearance between the blades and the inner wall of the shell is 0.5-3 mm.
8. The production process for preparing calcium hydroxide by using carbide slag is characterized by comprising the following steps of: production process is based on the production equipment for preparing calcium hydroxide by using carbide slag according to any one of claims 1 to 7, and comprises the following steps:
step 1, selecting materials: selecting carbide slag and quicklime; and the CaO content in the quicklime is above 85%;
step 2, feeding: adding carbide slag into a carbide slag proportioning bin, and adding quicklime into a raw stone powder proportioning bin;
step 3, batching: starting a first feeder and a second feeder, and conveying carbide slag and quicklime to a roller mill for rolling through the first feeder and the second feeder;
and step 4, rolling: starting a wheel mill, mixing and initially pressing the materials, rolling the naturally agglomerated carbide slag and raw stone blocks into powdery materials with the diameter of less than 0-3 mm, feeding the rolled materials into a first screw conveyor, and conveying the materials into a reaction kettle through the first screw conveyor; after the materials enter a reaction kettle, stirring the materials in the reaction kettle, and simultaneously adding additives through a liquid proportioner, wherein the additives comprise a sulfur removing agent, a phosphorus removing agent and a silver light brightening agent; when the materials are stirred, water in the carbide slag can react with quicklime to generate a certain amount of gas, and the gas can take away part of elements contained in the materials; the reacted material enters a digestion device;
step 5, digestion: the material entering the digestion device is digested, and enters the elevator through the discharge opening after being completely digested;
step 6, lifting materials and sorting: along with the operation of the lifter, the materials are lifted to a feeding port of the separator by the lifter, and after the materials enter the separator, the separator separates the materials;
step 7, separating a product: separating two products by a separator, wherein one product is calcium hydroxide and the other product is calcium carbonate particles; separating calcium carbonate, feeding the calcium carbonate into a calcium carbonate particle collector, and feeding the calcium carbonate into a flour mill through a second screw conveyor to be ground into more than 200 meshes; the separated calcium hydroxide enters a first fan through a calcium hydroxide collector, the first fan blows the finished product material into a calcium hydroxide finished product bin, and the separated calcium carbonate is blown into the calcium carbonate finished product bin through a second fan and a receiver after being ground.
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| WO2010012193A1 (en) * | 2008-08-01 | 2010-02-04 | 北京化工大学 | Method and system for the production of calcium carbide |
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| CN102423624A (en) * | 2011-10-24 | 2012-04-25 | 浙江菲达脱硫工程有限公司 | Apparatus and method for preparing high-activity calcium hydroxide by using carbide slag alkali residue |
| CN103288116A (en) * | 2013-05-15 | 2013-09-11 | 中国科学院过程工程研究所 | Method for preparing high-purity calcium hydroxide from carbide slag |
| CN105669053A (en) * | 2016-04-15 | 2016-06-15 | 范洪喜 | Industrial grade calcium hydroxide production equipment and technology |
| CN208022718U (en) * | 2018-01-23 | 2018-10-30 | 辽宁邦加钙业有限公司 | A kind of production equipment for producing calcium hydroxide using carbide slag |
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| WO2010012193A1 (en) * | 2008-08-01 | 2010-02-04 | 北京化工大学 | Method and system for the production of calcium carbide |
| CN101898083A (en) * | 2010-07-30 | 2010-12-01 | 福建龙净脱硫脱硝工程有限公司 | Method and device for preparing dry desulfurizing agent by using carbide slag |
| CN102423624A (en) * | 2011-10-24 | 2012-04-25 | 浙江菲达脱硫工程有限公司 | Apparatus and method for preparing high-activity calcium hydroxide by using carbide slag alkali residue |
| CN103288116A (en) * | 2013-05-15 | 2013-09-11 | 中国科学院过程工程研究所 | Method for preparing high-purity calcium hydroxide from carbide slag |
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