CN112408343B - Processing system of low-grade phosphate rock powder pellet - Google Patents
Processing system of low-grade phosphate rock powder pellet Download PDFInfo
- Publication number
- CN112408343B CN112408343B CN202110019468.5A CN202110019468A CN112408343B CN 112408343 B CN112408343 B CN 112408343B CN 202110019468 A CN202110019468 A CN 202110019468A CN 112408343 B CN112408343 B CN 112408343B
- Authority
- CN
- China
- Prior art keywords
- belt conveyor
- arranged below
- mixer
- outlet
- rubber belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000008188 pellet Substances 0.000 title claims abstract description 99
- 239000000843 powder Substances 0.000 title claims abstract description 58
- 239000002367 phosphate rock Substances 0.000 title claims abstract description 56
- 238000012545 processing Methods 0.000 title claims abstract description 19
- 239000000428 dust Substances 0.000 claims abstract description 76
- 238000003860 storage Methods 0.000 claims abstract description 73
- 239000000463 material Substances 0.000 claims abstract description 72
- 238000012216 screening Methods 0.000 claims abstract description 50
- 238000001816 cooling Methods 0.000 claims abstract description 42
- 238000003825 pressing Methods 0.000 claims abstract description 33
- 238000001035 drying Methods 0.000 claims abstract description 32
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 238000002360 preparation method Methods 0.000 claims abstract description 18
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- 238000005303 weighing Methods 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims description 24
- 239000000853 adhesive Substances 0.000 claims description 14
- 239000004744 fabric Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 14
- 230000005484 gravity Effects 0.000 claims description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- 239000002390 adhesive tape Substances 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 20
- 230000008901 benefit Effects 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 5
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 18
- 239000002994 raw material Substances 0.000 description 15
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 14
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- 239000004568 cement Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 230000008676 import Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005453 pelletization Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/01—Treating phosphate ores or other raw phosphate materials to obtain phosphorus or phosphorus compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a processing system of low-grade phosphate rock powder pellets, which comprises a material preparation unit, a material mixing unit, a ball pressing unit, a drying and cooling unit and a dust removal unit, wherein the material preparation unit comprises a powder storage tank and a binder storage tank, a screw feeder is arranged below the powder storage tank, and a first rubber belt conveyor is arranged below the screw feeder; the mixing unit comprises a first mixer and a second mixer; the ball pressing unit comprises at least 2 buffer tanks which are arranged side by side, a disc feeder, a weighing belt scale and a ball pressing machine are arranged below each buffer tank, a third rubber belt conveyor is arranged below the ball pressing machine, and a pellet strength detector, a first vibration screening machine and a fourth rubber belt conveyor are arranged below the third rubber belt conveyor; the drying and cooling unit comprises a tower dryer, a second vibrating screen, a fifth rubber belt conveyor, a second vibrating screen, a cooler and a finished product warehouse. The system has the advantages of reasonable structural design, high production efficiency, high productivity, stable and reliable pellet quality and the like.
Description
Technical Field
The invention belongs to the technical field of phosphorus chemical industry, and particularly relates to a processing system of low-grade phosphate rock powder pellets.
Background
Yellow phosphorus is an important chemical raw material, and various phosphide and phosphate produced by using the yellow phosphorus as a raw material are various in variety and wide in application. The preparation of phosphoric acid from yellow phosphorus is one of the production processes of phosphoric acid, namely hot phosphoric acid. The application of the hot phosphoric acid is wider than that of wet phosphoric acid, and the hot phosphoric acid can be used for producing feed-grade, food-grade and electronic-grade fine phosphate products and has the advantage of producing high-end phosphate products. Wet phosphoric acid has a great number of impurities, and is difficult to produce food-grade and electronic-grade phosphate products, so yellow phosphorus has an important market position. High-grade lump ore is required for producing yellow phosphorus, however, china has mined for many years, and the residue of the lump ore for producing yellow phosphorus is not large, so that the yellow phosphorus production requirement is difficult to meet. According to the resource reserve statistics, the national phosphorite resource reserve is about 18.9 hundred million tons, the basic reserve is 39.02 hundred million tons, and the phosphorite resource reserve is mainly distributed in five provinces of Yunnan, guizhou, hubei, sichuan and Hunan. The method is characterized in that the weight of W (P 2O5) is measured, the overall grade of phosphorite resources in China is lower, more than 90% of phosphorite is medium-low grade ore with P 2O5 less than 30%, rich ore with P 2O5 more than 30% only accounts for about 8% of the total reserve, the grade of phosphorite Dan Zhan with grade less than 25% is 78.57% of the total grade of phosphorite Dan Zhan, that is, more than 90% of phosphorite in China is medium-low grade phosphorite, and the average grade is only about 17%. Along with the continuous rapid development of the phosphorus chemical industry, the exploitation strength of high-grade phosphorite is continuously increased, and along with the mass exploitation of phosphorite resources, especially the general use of a lean exploitation and rich exploitation method and the inadequacy of exploitation technology are abandoned, the waste of phosphorite resources is caused, the rich ore with the mass fraction of P 2O5 being more than 30% is rapidly exhausted, and the rapid consumption of the rich ore causes the phosphorite crisis to be highlighted. At present, high-grade phosphorite for yellow phosphorus, especially weathered phosphorite, can generate a large amount of powder ore in the processing and using processes, the pulverization rate is usually about 20 percent, and the pulverization rate is as high as more than 50 percent, and the part of phosphorite powder can be used for producing yellow phosphorus after being prepared into pellets. In the prior art, the phosphorite powder pellet preparation system sequentially comprises a grinding unit, a ball making drying and cooling unit, a reduction reaction unit, a slag cooling unit and a separation and purification unit according to the flow direction of materials, and the materials are conveyed between adjacent units through a tape machine respectively. The preparation system has the advantages of low phosphate rock powder utilization rate, low production efficiency, low pelletizing rate and higher production cost in the use process. Therefore, the development of a processing system of low-grade phosphate rock powder pellets with reasonable structural design, high production efficiency, high productivity and stable and reliable pellet quality is objectively required.
Disclosure of Invention
In order to solve the problems in the background art, the invention aims to provide a processing system of low-grade phosphate rock powder pellets, which has the advantages of reasonable structural design, high production efficiency, high productivity and stable and reliable pellet quality.
The invention relates to a processing system of low-grade phosphate rock powder pellets, which comprises a material preparation unit, a material mixing unit, a ball pressing unit, a drying and cooling unit and a dust removal unit,
The material preparation unit comprises at least 3 powder storage tanks and binder storage tanks, wherein the powder storage tanks are arranged side by side, the top of each powder storage tank is provided with a feed inlet, the bottom of each powder storage tank is provided with a blanking pipe, a start gate valve and a star-shaped blanking device are arranged on the blanking pipe along the flow direction of materials, a screen is arranged in each powder storage tank, a coarse material outlet is formed in the wall of each powder storage tank on the upper side of the screen, a coarse material conveyor is arranged below the coarse material outlet, a screw feeder is arranged at the bottom of each blanking pipe, a first adhesive tape conveyor is arranged below the screw feeder, 2 binder storage tanks are arranged, the discharge ports of the 2 binder storage tanks are all connected with a binder conveying pipe, a first conveying pump is arranged on each binder conveying pipe, and the outlet of each binder conveying pipe is connected with a high-level storage tank;
The mixing unit comprises a first mixer and a second mixer, wherein a feed inlet of the first mixer is positioned below a discharge end of the first rubber belt conveyor, a first communication pipe is arranged between the feed inlet of the first mixer and a discharge outlet of the high-level storage tank, a metering pump is arranged on the first communication pipe, the discharge outlet of the first mixer is connected with the feed inlet of the second mixer, a second rubber belt conveyor is arranged below the discharge outlet of the second mixer, and a suspension type permanent magnet iron remover is arranged above the second rubber belt conveyor;
The ball pressing unit comprises at least 2 buffer tanks which are arranged side by side, a second communicating pipe is arranged between every two adjacent buffer tanks, a second conveying pump is arranged on the second communicating pipe, a feed inlet of one buffer tank is positioned below a discharge end of a second rubber belt conveyor, a disc feeder is arranged below each discharge end of each buffer tank, a weighing belt scale is arranged below each disc feeder, a ball pressing machine is arranged below the discharge end of each weighing belt scale, a third rubber belt conveyor is arranged below the discharge end of each ball pressing machine, a pellet strength detector is arranged below the discharge end of each third rubber belt conveyor, a reject outlet of each pellet strength detector is connected with a feed inlet of each ball pressing machine through a lifter, a first vibration screening machine is arranged below a reject outlet of each pellet strength detector, and a fourth rubber belt conveyor is arranged below the reject outlet of each first vibration screening machine;
The drying and cooling unit comprises a tower dryer and a second vibration screening machine, wherein a feed inlet of the tower dryer is positioned below a discharge end of the fourth belt conveyor, a fifth belt conveyor is arranged below a discharge end of the tower dryer, a feed inlet of the second vibration screening machine is positioned below a discharge end of the fifth belt conveyor, a second storage tank is arranged below a disqualified material outlet of the second vibration screening machine, a cooler is arranged below a qualified material outlet of the second vibration screening machine, and a finished product warehouse is arranged below a discharge end of the cooler;
the dust removal units are 3 groups and are respectively arranged at the positions of the material preparation unit, the ball pressing unit and the drying and cooling unit.
Further, the stoving cooling unit still includes the pellet pre-heater, and the pellet pre-heater sets up between first vibration screening machine and tower drying-machine, and the pellet pre-heater includes the preheating box and runs through the first guipure conveyer that the preheating box set up, and the feed end of first guipure conveyer is located the below of first vibration screening machine qualification export, the discharge end of first guipure conveyer is located the top of fourth guipure conveyer feed end, and the bottom of preheating box is provided with a plurality of flue gas import, and the top of preheating box is provided with a plurality of wet mouthfuls, is provided with the exhaust pipe on the exhaust chamber of tower drying-machine, is provided with many flue gas branch pipes with flue gas import intercommunication on the exhaust pipe, installs the admission valve on the flue gas branch pipe, has tail gas treatment ware through the pipe connection on the wet mouthful.
Further, a pellet distributor is arranged between the discharge end of the fourth belt conveyor and the feed inlet of the tower dryer.
Further, the cooler includes the cooling box and runs through the second guipure conveyer that the cooling box set up, and the feed end of second guipure conveyer is located the below of second vibration screening machine qualification material export, and the discharge end of second guipure conveyer is located the feed inlet top in finished product storehouse, and the top in the cooling box is provided with a plurality of cooling fans and a plurality of air conditioning import, and the top of cooling box is provided with a plurality of gas vents, and the gas vent also links to each other with tail gas processor through the pipeline.
Further, each group of dust removing units comprises a dust collecting cover, a dust discharging pipe, a gravity dust remover and a cloth bag dust remover, the dust collecting cover of the material preparing unit is arranged at the feeding hole of the powder storage tank, the dust collecting cover of the ball pressing unit is arranged at the feeding hole of the first vibration screening machine, the dust collecting cover of the drying cooling unit is arranged at the feeding hole of the tower dryer and the feeding hole of the second vibration screening machine, the air outlet of the dust collecting cover is connected with the air inlet of the dust discharging pipe, the air outlet of the dust discharging pipe is connected with the air inlet of the gravity dust remover, the air outlet of the gravity dust remover is connected with the air inlet of the cloth bag dust remover, the air outlets of the cloth bag dust remover are provided with induced fans, and the dust outlets of the gravity dust remover and the cloth bag dust remover are connected with a first scraper conveyor, and the discharge hole of the first scraper conveyor is connected with the feeding hole of the first mixer.
Further, the discharge ports of the first storage tank and the second storage tank are connected with a second scraper conveyor, and the discharge port of the second scraper conveyor is connected with the feed inlet of the first mixer.
Further, the first mixer and the second mixer are both double-shaft mixers.
Further, the lower parts of the discharge ends of the first belt conveyor, the second belt conveyor, the third belt conveyor, the fourth belt conveyor and the fifth belt conveyor are obliquely provided with guide plates.
The invention has the following advantages: firstly, after purchased powdered rock phosphate raw materials enter a factory, the raw materials enter a powder storage tank according to the component content, and after screening by a screen, the powdered rock phosphate raw materials with unqualified particle sizes can be screened out to obtain powdered rock phosphate particles with qualified and uniform particle sizes, so that the specific surface area of the powdered rock phosphate is improved, meanwhile, two adhesive storage tanks are arranged for realizing the configuration of adhesives, and the arranged high-level storage tanks are used for caching the adhesives so as to ensure the continuous and smooth production of downstream procedures; secondly, the mixing device adopts a structure of arranging two stages of mixers, and the phosphorite powder raw materials and the adhesive are mixed twice in the first mixer and the second mixer, so that a good mixing and stirring effect is achieved; thirdly, the mixed material obtained through stirring and mixing firstly enters each buffer tank, then enters a ball pressing machine for pressing into balls after being subjected to quantitative feeding by a disc feeder and a weighing belt scale, the formed balls firstly enter a ball strength detector for strength detection, the balls with unqualified strength are removed, the ball forming rate of the balls after subsequent drying is favorably improved, the balls with the strength meeting the requirements enter a first vibration screening machine for screening, the balls with the diameter meeting the requirements are screened out, the balls with the diameter meeting the requirements are obtained, the yield of the balls in the subsequent drying device is favorably improved, and a plurality of ball pressing machines simultaneously perform ball forming work, so that the productivity of the whole set of device is favorably improved; fourthly, the pellets are sent into a tower dryer for drying, the contact area between hot air and the pellets in the tower dryer is large, the contact temperature is uniform, the drying efficiency is high, the drying speed is high, and the dried pellets can be further screened out after being screened by a second vibration screening machine, so that the dried pellets which do not meet the requirements can be further screened out, and the dried pellets with high strength and meet the requirements are obtained; and fifthly, the corresponding dust removing unit is arranged on the processing unit capable of generating dust, so that the emission of the dust can be avoided, and the clean production of the whole production system can be guaranteed. In conclusion, the system has the advantages of reasonable structural design, high production efficiency, high productivity, stable and reliable pellet quality and high phosphate rock powder utilization rate, can generate good economic benefit, and is easy to popularize and use.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
in the figure: 1-powder storage tank, 101-charging port, 102-blanking pipe, 103-start gate valve, 104-star type blanking device, 105-screen, 106-coarse material outlet, 107-coarse material conveyor, 108-screw feeder, 2-adhesive storage tank, 201-adhesive conveying pipe, 202-first conveying pump, 203-high-level storage tank, 204-first communication pipe, 205-metering pump, 3-first adhesive tape conveyor, 4-first mixer, 5-second mixer, 6-second adhesive tape conveyor, 7-suspension permanent magnet iron remover, 8-buffer tank, 801-second communication pipe, 802-second conveying pump, 9-disc feeder, 10-weighing belt scale, 11-ball press, 12-third belt conveyor, 13-first vibration screening machine, 14-first storage tank, 15-pellet intensity detector, 16-fourth belt conveyor, 17-tower dryer, 18-second vibration screening machine, 19-fifth belt conveyor, 20-second storage tank, 21-cooler, 22-finished product warehouse, 23-pellet preheater, 24-pellet distributor, 25-smoke exhaust pipe, 26-tail gas processor, 27-dust collection cover, 28-dust exhaust pipe, 29-gravity dust remover, 30-and cloth bag dust remover, 31-first scraper conveyor, 32-guide plate.
Detailed Description
The invention is further described below with reference to examples and the accompanying drawings, which are not in any way limiting, but are any changes or substitutions based on the teachings of the invention, all falling within the scope of the invention.
As shown in figure 1, the processing system of the low-grade phosphate rock pellets is characterized by comprising a material preparation unit, a material mixing unit, a ball pressing unit, a drying and cooling unit and a dust removal unit, wherein the material preparation unit is used for preparing phosphate rock raw materials and adhesives, the material mixing unit is used for stirring and mixing the phosphate rock raw materials and the adhesives, the ball pressing unit is used for pressing the mixture of the phosphate rock raw materials and the adhesives into balls, the drying and cooling unit is used for drying and sintering the balls into dry pellets by using a heat source, and the dust removal unit is used for collecting and purifying dust generated in the working processes of the material preparation unit, the material mixing unit, the ball pressing unit and the drying and cooling unit, so that clean production of the whole production system is ensured.
The preparation unit comprises powder storage tanks 1 and binder storage tanks 2, wherein the powder storage tanks 1 are used for storing phosphate rock powder raw materials, the powder storage tanks 1 are at least 3, a plurality of powder storage tanks 1 are arranged side by side, a feeding port 101 is formed in the top of each powder storage tank 1, a discharging pipe 102 is arranged at the bottom of each discharging pipe 102, a start gate valve 103 and a star-shaped discharging device 104 are arranged on the discharging pipe 102 along the flow direction of materials, the pneumatic gate valve 103 and the star-shaped discharging device 104 are used for discharging phosphate rock powder raw materials in the powder storage tanks 1, a screen 105 is arranged in each powder storage tank 1, the screen 105 is used for screening the phosphate rock powder, a coarse material outlet 106 is formed in the tank wall of the powder storage tank 1 on the upper side of the screen 105, a coarse material conveyer 107 is arranged below the coarse material outlet 106, a screw feeder 108 is arranged at the bottom of each discharging pipe 102, a first adhesive tape conveyer 3 is arranged below the screw feeder 108, the first conveyer 3 is in the prior art, the binder storage tanks 2 are used for discharging the phosphate rock powder raw materials, the binder storage tanks 2 are connected with the cement storage tanks 203, and the cement storage tanks 201 are connected with the cement storage tanks 201 in a high-pressure storage tank, and the cement storage tanks 201 are connected with the cement storage tanks 203.
The mixing unit comprises a first mixer 4 and a second mixer 5, preferably, the first mixer 4 and the second mixer 5 are double-shaft mixers, a feed inlet of the first mixer 4 is positioned below a discharge end of the first rubber belt conveyor 3, a first communication pipe 204 is arranged between the feed inlet of the first mixer 4 and a discharge outlet of the high-level storage tank 203, a metering pump 205 is installed on the first communication pipe 204, the discharge outlet of the first mixer 4 is connected with the feed inlet of the second mixer 5, a second rubber belt conveyor 6 is arranged below the discharge outlet of the second mixer 5, the second rubber belt conveyor 6 is in the prior art, a hanging permanent magnet iron remover 7 is arranged above the second rubber belt conveyor 6, the hanging permanent magnet iron remover 7 is used for removing ferromagnetic materials in the mixed materials, the two-stage mixer is adopted to mix the phosphorite powder raw materials and the adhesive in the first mixer 4 and the second mixer 5 twice, the effect of mixing and stirring is better,
The ball pressing unit comprises at least 2 buffer tanks 8 which are arranged side by side, a plurality of buffer tanks 8 are arranged for storing the mixture of the phosphate rock powder and the adhesive, the continuous production of the system is ensured, a second communicating pipe 801 is arranged between two adjacent buffer tanks 8, a second material conveying pump 802 is arranged on the second communicating pipe 801, a feed inlet of one buffer tank 8 is positioned below a discharge end of a second belt conveyor 6, a disc feeder 9 is arranged below the discharge outlet of each buffer tank 8, a weighing belt scale 10 is arranged below the disc feeder 9, the quantitative feeding of the mixture can be realized by the cooperation of the disc feeder 9 and the weighing belt scale 10, the feeding amount of the material entering the ball pressing machine 11 is ensured to be uniform and stable, the disc feeder 9 and the weighing belt scale 10 are in the prior art, the ball pressing machine 11 is arranged below the discharge outlet of the weighing belt scale 10, the ball press 11 is a twin-roll ball press used in the prior art, a third rubber belt conveyor 12 is arranged below a discharge port of the ball press 11, a pellet strength detector 15 is arranged below a discharge port of the third rubber belt conveyor 12, the pellet strength detector 15 is used for detecting the strength of pellets, the lower part of a reject outlet of the pellet strength detector 15 is connected with a feed port of the ball press 11 through a lifter, a first vibration screening machine 13 is arranged below a reject outlet of the pellet strength detector 15, a first storage tank 14 is arranged below a reject outlet of the first vibration screening machine 13, a fourth rubber belt conveyor 16 is arranged below a reject outlet of the first vibration screening machine 13, the fourth rubber belt conveyor 16 is in the prior art, and the mixed materials obtained through stirring and mixing enter into each buffer tank 8, and after the pellets are quantitatively fed through the disc feeder 9 and the weighing belt scale 10, the pellets are pressed into pellets by the ball press 11, the formed pellets firstly enter the pellet strength detector 15 for strength detection, the pellets with unqualified strength are removed, the pelletizing rate of the pellets after subsequent drying is favorably improved, the pellets with qualified strength enter the first vibration screening machine 13 again for screening, the pellets with unqualified diameter are screened out, the pellets with qualified diameter are obtained, the yield of the pellets in the subsequent drying device is favorably improved, and the plurality of ball presses 11 simultaneously carry out the pellet production work, so that the productivity of the whole device is favorably improved.
The drying and cooling unit comprises a tower dryer 17 and a second vibration screening machine 18, wherein a feed inlet of the tower dryer 17 is positioned below a discharge end of a fourth rubber belt conveyor 16, a fifth rubber belt conveyor 19 is arranged below the discharge end of the tower dryer 17, the fifth rubber belt conveyor 19 is in the prior art, a feed inlet of the second vibration screening machine 18 is positioned below the discharge end of the fifth rubber belt conveyor 19, a second storage tank 20 is arranged below a disqualified material outlet of the second vibration screening machine 18, a cooler 21 is arranged below a qualified material outlet of the second vibration screening machine 18, a finished product warehouse 22 is arranged below the discharge outlet of the cooler 21, pellets are fed into the tower dryer 17 for drying, the contact area of hot air and the pellets in the tower dryer 17 is large, the contact temperature is uniform, the drying efficiency is high, the drying speed is high, and the dried pellets which are not in accordance with the requirements after being dried can be further screened by the second vibration screening machine 18, so that the dried pellets which are high in strength and in accordance with the requirements can be obtained.
The dust removal unit is 3 groups, is respectively arranged at the positions of the material preparation unit, the ball pressing unit and the drying and cooling unit, and is provided with the corresponding dust removal unit at the processing unit capable of generating dust, so that the emission of dust can be avoided, and the clean production of the whole production system can be guaranteed.
The working process of the system is as follows: after the purchased phosphate rock powder raw materials enter factories, the phosphate rock powder raw materials enter each powder storage tank 1 in sequence through a feed inlet 101 according to the component content, after entering the powder storage tanks 1, the phosphate rock powder which does not meet the particle size requirement is screened by a screen 105, discharged through a coarse material outlet 106, output through a coarse material conveyor 107, crushed and reused, the phosphate rock powder which meets the particle size requirement falls into the bottom of the powder storage tanks 1 below the screen 105, when the ingredients are needed to be prepared, the pneumatic gate valve 103 and the star-shaped blanking device 104 are opened, the phosphate rock powder at the bottom of the powder storage tanks 1 can be discharged from a blanking pipe 102, quantitatively conveyed to a first rubber belt conveyor 3 through a screw feeder 108, conveyed to a first mixer 4 through the first rubber belt conveyor 3, and simultaneously opened a metering pump 205 while conveying the phosphate rock powder raw materials to the first mixer 4, after the adhesive stored in the high-level storage tank 203 is conveyed to the first mixer 4 through the first communicating pipe 204, the adhesive and the ground phosphate rock are stirred and mixed in the first mixer 4, then enter the second mixer 5 for second stirring and mixing, the mixed material after the second stirring and mixing is conveyed into the buffer tank 8 through the second rubber belt conveyor 6, the suspended permanent magnet iron remover 7 can remove ferromagnetic materials in the mixed material in the process of conveying the mixed material through the second rubber belt conveyor 6, all the buffer tanks 8 are communicated through the second communicating pipe 801, when the ball press ball machine is used, the number of the buffer tanks 8 can be reasonably selected according to the use requirement and the production capacity, after the mixed material enters the buffer tank 8, the mixed material firstly enters the disc feeder 9 for uniform feeding through the disc feeder 9, and then the mixed material is quantitatively conveyed into the ball press 11 through the weighing belt balance 10, after extrusion by the ball pressing machine 11, the mixture can be made into pellets with certain strength, the pellets made by the ball pressing machine 11 firstly enter the pellet strength detector 15, after detection by the pellet strength detector 15, the pellets which do not meet the strength enter the ball pressing machine 11 again for pelletizing after crushing, the pellets which meet the strength requirement enter the first vibration screening machine 13, after screening by the first vibration screening machine 13, the pellets which do not meet the requirement enter the first storage tank 14, the pellets which meet the requirement are conveyed into the tower dryer 17 by the fourth adhesive tape conveyor 16, after drying and sintering by hot air, the dried pellets are obtained, after being discharged from the bottom of the tower dryer 17, are conveyed into the second vibration screening machine 18 by the fifth adhesive tape conveyor 19, after screening by the second vibration screening machine 18, the unqualified dried pellets enter the second storage tank 20, after cooling by the cooling machine 21, enter the finished product warehouse 22, and if necessary, the quality of the dried pellets can be further improved by the dry pellet quality detector arranged between the fifth adhesive tape conveyor 19 and the second vibration screening machine 18. In conclusion, the system has the advantages of reasonable structural design, high production efficiency, high productivity, stable and reliable pellet quality and high phosphate rock powder utilization rate.
Further, in order to improve the drying efficiency of tower dryer 17, stoving cooling unit still includes pellet preheater 23, pellet preheater 23 sets up between first vibration screening machine 13 and tower dryer 17, pellet preheater 23 includes the preheating box and runs through the first guipure conveyer that the preheating box set up, the feed end of first guipure conveyer is located the below of the qualified material export of first vibration screening machine 13, the discharge end of first guipure conveyer is located the top of fourth sticky tape conveyer 16 feed end, the bottom of preheating box is provided with a plurality of flue gas inlets, and the top of preheating box is provided with a plurality of exhaust-wet mouths, be provided with exhaust pipe 25 on the exhaust-gas chamber of tower dryer 17, be provided with a plurality of flue gas branch pipes that communicate with the flue gas inlet on the exhaust-gas branch pipe, install the admission valve on the exhaust-wet mouths through the pipe connection, utilize pellet preheater 23 to preheat entering into tower dryer 17 in order to improve the top of entering into the top of fourth sticky tape conveyer 16 feed end, in order to carry out the preheating-wet temperature to the pellet preheater in addition, the high temperature of entering the exhaust-wet pellet heater is carried out in the exhaust-wet pellet dryer 23, and the high temperature of the pellet can be carried out in the exhaust-wet pellet heater is carried out in the exhaust-heat from the exhaust pipe 25, and the pellet heater is discharged after the high temperature of the exhaust-heat is greatly discharged, and the pellet heater is discharged into the pellet heater is directly after the exhaust-wet in the exhaust temperature is discharged, and the pellet heater is greatly discharged into the exhaust-wet in the exhaust temperature after the pellet heater is discharged into the pellet heater and the drying process and the pellet heater and can be greatly. In order to ensure uniform distribution of the pellets entering the tower dryer 17, a pellet distributor 24 is preferably disposed between the discharge end of the fourth belt conveyor 16 and the feed inlet of the tower dryer 17.
Further, the cooler 21 includes the cooling box and runs through the second guipure conveyer that the cooling box set up, the feed end of second guipure conveyer is located the below of the qualified export of second vibration screening machine 18, the discharge end of second guipure conveyer is located the feed inlet top of finished product storehouse 22, the top in the cooling box is provided with a plurality of cooling fans and a plurality of air conditioning import, the top of cooling box is provided with a plurality of gas vents, and the gas vent also links to each other with tail gas processor 26 through the pipeline, utilizes air cooling's mode to cool down the pellet, and the cooling effect is better, and the steam after the cooling enters into tail gas processor 26 after the gas vent discharges, can avoid air pollution.
Further, each group of dust removing units comprises a dust collecting cover 27, a dust discharging pipe 28, a gravity dust remover 29 and a cloth bag dust remover 30, the gravity dust remover 29 and the cloth bag dust remover 30 adopt structures in the prior art, the dust collecting cover 27 of the material preparing unit is arranged at a feeding port 101 of the powder storage tank 1, the dust collecting cover 27 of the ball pressing unit is arranged at a feeding port of the first vibration screening machine 13, the dust collecting cover 27 of the drying and cooling unit is arranged at the feeding port of the tower dryer 17 and the feeding port of the second vibration screening machine 18, an air outlet of the dust collecting cover 27 is connected with an air inlet of the dust discharging pipe 28, an air outlet of the dust discharging pipe 28 is connected with an air inlet of the gravity dust remover 29, an air outlet of the gravity dust remover 29 is connected with an air inlet of the cloth bag dust remover 30, an induced draft fan is arranged at an air outlet of the cloth bag dust remover 30, clean production of the whole production system can be ensured through reasonably arranging the dust collecting cover 27, and meanwhile, the dust outlets of the gravity dust remover 29 and the cloth bag dust remover 30 are connected with a first scraper conveyor 31, and the first scraper conveyor 31 is connected with a first scraper conveyor 4, and the first scraper conveyor 31 can be recycled and recycled.
Further, the discharge ports of the first storage tank 14 and the second storage tank 20 are connected with a second scraper conveyor, the discharge port of the second scraper conveyor is connected with the feed inlet of the first mixer 4, and the reject pellets in the first storage tank 14 and the second storage tank 20 can be crushed by the second scraper conveyor and then recycled.
Further, the material guiding plates 32 are obliquely arranged below the discharge ends of the first belt conveyor 3, the second belt conveyor 6, the third belt conveyor 12, the fourth belt conveyor 16 and the fifth belt conveyor 19, and the arranged material guiding plates 32 can guide the materials at the discharge ends of the belt conveyors into corresponding equipment, so that the possibility of material leakage is avoided.
Claims (8)
1. The processing system of the low-grade phosphate rock pellet is characterized by comprising a material preparation unit, a material mixing unit, a ball pressing unit, a drying and cooling unit and a dust removal unit, and is characterized in that:
The device comprises a material preparation unit, a material preparation unit and a material preparation unit, wherein the material preparation unit comprises powder storage tanks (1) and binder storage tanks (2), wherein the number of the powder storage tanks (1) is at least 3, the powder storage tanks (1) are arranged side by side, the top of each powder storage tank (1) is provided with a feed inlet (101), the bottom of each powder storage tank is provided with a material discharging pipe (102), the material discharging pipe (102) is provided with a start gate valve (103) and a star-shaped material discharging device (104) along the flow direction of materials, a screen (105) is arranged in each powder storage tank (1), the wall of each powder storage tank (1) at the upper side of the screen (105) is provided with a coarse material outlet (106), the lower part of each coarse material outlet (106) is provided with a coarse material conveyer (107), the bottom of each material discharging pipe (102) is provided with a screw feeder (108), the lower part of each screw feeder (108) is provided with a first adhesive conveyer (3), the number of binder storage tanks (2) is 2, the discharge ports of the 2 binder storage tanks (2) are respectively connected with a binder conveyer pipe (201), and the binder conveyer pipe (201) is connected with a binder conveyer (203) at the upper position of the first conveyer (201);
The mixing unit comprises a first mixer (4) and a second mixer (5), wherein a feed inlet of the first mixer (4) is positioned below a discharge end of a first rubber belt conveyor (3), a first communication pipe (204) is arranged between the feed inlet of the first mixer (4) and a discharge outlet of a high-level storage tank (203), a metering pump (205) is arranged on the first communication pipe (204), the discharge outlet of the first mixer (4) is connected with the feed inlet of the second mixer (5), a second rubber belt conveyor (6) is arranged below the discharge outlet of the second mixer (5), and a suspension permanent magnet iron remover (7) is arranged above the second rubber belt conveyor (6);
The ball pressing unit comprises at least 2 buffer tanks (8) which are arranged side by side, a second communicating pipe (801) is arranged between every two adjacent buffer tanks (8), a second conveying pump (802) is arranged on the second communicating pipe (801), a feed inlet of one buffer tank (8) is positioned below a discharge end of a second adhesive tape conveyor (6), a disc feeder (9) is arranged below the discharge end of each buffer tank (8), a weighing belt scale (10) is arranged below the disc feeder (9), a ball pressing machine (11) is arranged below the discharge end of the weighing belt scale (10), a third adhesive tape conveyor (12) is arranged below the discharge end of the ball pressing machine (11), a pellet strength detector (15) is arranged below the discharge end of the third adhesive tape conveyor (12), a pellet passing outlet of the strength detector (15) is connected with the feed inlet of the ball pressing machine (11) through a lifting machine, a first vibrating conveyor (13) is arranged below the first sieving outlet of the strength detector (15), and a first vibrating conveyor (13) is arranged below the sieving outlet of the fourth vibrating conveyor (13);
The drying and cooling unit comprises a tower dryer (17) and a second vibration screening machine (18), wherein a feed inlet of the tower dryer (17) is positioned below a discharge end of a fourth rubber belt conveyor (16), a fifth rubber belt conveyor (19) is arranged below the discharge outlet of the tower dryer (17), a feed inlet of the second vibration screening machine (18) is positioned below the discharge end of the fifth rubber belt conveyor (19), a second storage tank (20) is arranged below a disqualified material outlet of the second vibration screening machine (18), a cooler (21) is arranged below a qualified material outlet of the second vibration screening machine (18), and a finished product warehouse (22) is arranged below the discharge outlet of the cooler (21);
the dust removing units are 3 groups and are respectively arranged at the positions of the material preparing unit, the ball pressing unit and the drying and cooling unit.
2. The system for processing low-grade ground phosphate rock pellets according to claim 1, wherein: the drying and cooling unit further comprises a pellet preheater (23), the pellet preheater (23) is arranged between the first vibration screening machine (13) and the tower dryer (17), the pellet preheater (23) comprises a preheating box body and a first mesh belt conveyor which is arranged through the preheating box body, the feeding end of the first mesh belt conveyor is arranged below the qualified material outlet of the first vibration screening machine (13), the discharging end of the first mesh belt conveyor is arranged above the feeding end of the fourth belt conveyor (16), a plurality of flue gas inlets are arranged at the bottom of the preheating box body, a plurality of moisture exhaust ports are arranged at the top of the preheating box body, a plurality of flue gas branch pipes which are communicated with the flue gas inlets are arranged on the flue gas exhaust pipes (25), and an air inlet valve is arranged on the flue gas branch pipes, and a tail gas processor (26) is connected to the moisture exhaust ports through pipelines.
3. The system for processing low-grade ground phosphate rock pellets according to claim 1, wherein: a pellet distributor (24) is arranged between the discharge end of the fourth belt conveyor (16) and the feed inlet of the tower dryer (17).
4. The system for processing low-grade ground phosphate rock pellets according to claim 1, wherein: the cooling machine (21) comprises a cooling box body and a second mesh belt conveyor penetrating through the cooling box body, wherein the feeding end of the second mesh belt conveyor is located below a qualified material outlet of the second vibration screening machine (18), the discharging end of the second mesh belt conveyor is located above a feeding inlet of a finished product warehouse (22), a plurality of cooling fans and a plurality of cold air inlets are arranged at the top in the cooling box body, a plurality of exhaust ports are arranged at the top of the cooling box body, and the exhaust ports are also connected with a tail gas processor (26) through pipelines.
5. The system for processing low-grade ground phosphate rock pellets according to claim 1, wherein: each group of dust removing units comprises a dust collecting cover (27), a dust discharging pipe (28), a gravity dust collector (29) and a cloth bag dust collector (30), the dust collecting cover (27) of the material preparing unit is arranged at a feeding hole (101) of a powder storage tank (1), the dust collecting cover (27) of the ball pressing unit is arranged at a feeding hole of a first vibration screening machine (13), the dust collecting cover (27) of the drying and cooling unit is arranged at a feeding hole of a tower dryer (17) and a feeding hole of a second vibration screening machine (18), an air outlet of the dust collecting cover (27) is connected with an air inlet of the dust discharging pipe (28), an air outlet of the dust discharging pipe (28) is connected with an air inlet of the gravity dust collector (29), an air outlet of the gravity dust collector (29) is connected with an air inlet of the cloth bag dust collector (30), an air outlet of the cloth bag dust collector (30) is provided with an induced draft fan, and dust outlets of the gravity dust collector (29) and the cloth bag dust collector (30) are connected with a first scraper conveyor (31), and an air outlet of the first scraper conveyor (31) is connected with an air inlet of the first scraper (4).
6. The system for processing low-grade ground phosphate rock pellets according to claim 1, wherein: the discharge ports of the first storage tank (14) and the second storage tank (20) are connected with a second scraper conveyor, and the discharge port of the second scraper conveyor is connected with the feed inlet of the first mixer (4).
7. The system for processing low-grade ground phosphate rock pellets according to claim 1, wherein: the first mixer (4) and the second mixer (5) are double-shaft mixers.
8. The system for processing low-grade ground phosphate rock pellets according to claim 1, wherein: the material guiding plates (32) are obliquely arranged below the discharging ends of the first rubber belt conveyor (3), the second rubber belt conveyor (6), the third rubber belt conveyor (12), the fourth rubber belt conveyor (16) and the fifth rubber belt conveyor (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110019468.5A CN112408343B (en) | 2021-01-07 | 2021-01-07 | Processing system of low-grade phosphate rock powder pellet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110019468.5A CN112408343B (en) | 2021-01-07 | 2021-01-07 | Processing system of low-grade phosphate rock powder pellet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112408343A CN112408343A (en) | 2021-02-26 |
| CN112408343B true CN112408343B (en) | 2024-04-19 |
Family
ID=74783038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110019468.5A Active CN112408343B (en) | 2021-01-07 | 2021-01-07 | Processing system of low-grade phosphate rock powder pellet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112408343B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113004102B (en) * | 2021-03-08 | 2022-07-29 | 广州天适立农生态农业发展有限公司 | Full water-soluble agate type granular bacterial manure production equipment |
| CN118558226A (en) * | 2023-02-08 | 2024-08-30 | 会东金川磷化工有限责任公司 | Precise batching control method for yellow phosphorus production |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103964404A (en) * | 2014-04-24 | 2014-08-06 | 贵州省惠水川东化工有限公司 | Method for producing powdered rock phosphate balls by using powdered rock phosphate |
| US20160152472A1 (en) * | 2013-06-04 | 2016-06-02 | Sichuan Ko Chang Technology Co., Ltd | Method for mass production of phosphoric acid with rotary kiln |
| CN214299291U (en) * | 2021-01-07 | 2021-09-28 | 云南省宣威东升化工有限公司 | Processing system of low-grade ground phosphate rock pelletizing |
-
2021
- 2021-01-07 CN CN202110019468.5A patent/CN112408343B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160152472A1 (en) * | 2013-06-04 | 2016-06-02 | Sichuan Ko Chang Technology Co., Ltd | Method for mass production of phosphoric acid with rotary kiln |
| CN103964404A (en) * | 2014-04-24 | 2014-08-06 | 贵州省惠水川东化工有限公司 | Method for producing powdered rock phosphate balls by using powdered rock phosphate |
| CN214299291U (en) * | 2021-01-07 | 2021-09-28 | 云南省宣威东升化工有限公司 | Processing system of low-grade ground phosphate rock pelletizing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112408343A (en) | 2021-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102500455B (en) | Tailing efficient recovery treatment method | |
| CN105773834B (en) | Ceramic raw material point mill centralized system is for Processes and apparatus | |
| CN102358705B (en) | Process for producing sintered ceramsite by using solid waste materials, and system thereof | |
| CN112408343B (en) | Processing system of low-grade phosphate rock powder pellet | |
| CN105773835A (en) | Ceramic raw material mixed-grinding concentrated preparation process and device | |
| CN214299291U (en) | Processing system of low-grade ground phosphate rock pelletizing | |
| CN102744211A (en) | Method for modification of phosphorus tailings and separation and enrichment of phosphorus and magnesium | |
| CN104787741B (en) | The method of the carbon containing powder resource utilization of industry | |
| CN203874873U (en) | Nickel slag grinding system | |
| CN109913642B (en) | Rotary hearth furnace raw material treatment system and process thereof | |
| CN207862278U (en) | Recycling coke powder prepares the device of formed coke | |
| CN1098236C (en) | Drying-granulating integrated process for preparing granular compound organic fertilizer and its complete set of apparatuses | |
| CN114011834A (en) | Carbide slag calcines reduction retrieval and utilization carbide stove coproduction desulfurizer system | |
| CN211964515U (en) | Manganese ore pellet preparation system | |
| CN113087002A (en) | Method and system for preparing calcium oxide balls from carbide slag | |
| CN214991226U (en) | High-efficient environmental protection compound fertilizer apparatus for producing | |
| CN215947129U (en) | Environment-friendly raw material automatic preparation system for cement production | |
| CN207192808U (en) | A kind of system for preparing calcium carbide | |
| CN205128141U (en) | Outfit of production tailing miropowder | |
| CN221027708U (en) | Phosphate rock powder briquetting roasting system | |
| CN102719665A (en) | Process method and equipment for producing slag-forming agent for making steel by utilizing steel making sludge | |
| CN107337208A (en) | A kind of system and method that calcium carbide is produced using biomass pyrolytic | |
| CN201128749Y (en) | System for producing cold bonding block with steel making and steel rolling sludge | |
| CN220579347U (en) | Pellet roasting system for co-processing mixed phosphorite | |
| CN207192806U (en) | A kind of system that calcium carbide is produced using biomass pyrolytic |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |