CN103103357B - Method for drying, calcining and cooling metal slag material - Google Patents
Method for drying, calcining and cooling metal slag material Download PDFInfo
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- CN103103357B CN103103357B CN201210479890.XA CN201210479890A CN103103357B CN 103103357 B CN103103357 B CN 103103357B CN 201210479890 A CN201210479890 A CN 201210479890A CN 103103357 B CN103103357 B CN 103103357B
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- 239000002893 slag Substances 0.000 title claims abstract description 135
- 238000001816 cooling Methods 0.000 title claims abstract description 39
- 238000001354 calcination Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 16
- 239000002184 metal Substances 0.000 title claims abstract description 16
- 238000001035 drying Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 title abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000002386 leaching Methods 0.000 claims abstract description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000446 fuel Substances 0.000 claims abstract description 13
- 239000000779 smoke Substances 0.000 claims abstract description 12
- 239000000428 dust Substances 0.000 claims abstract description 11
- 239000000295 fuel oil Substances 0.000 claims abstract description 7
- 239000003345 natural gas Substances 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 3
- 239000003034 coal gas Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 10
- 238000000643 oven drying Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 235000009508 confectionery Nutrition 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims description 5
- 235000013599 spices Nutrition 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000013043 chemical agent Substances 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002912 waste gas Substances 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 238000003723 Smelting Methods 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 abstract 1
- 238000000227 grinding Methods 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 3
- 229910052750 molybdenum Inorganic materials 0.000 description 3
- 239000011733 molybdenum Substances 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention belongs to the technical field of nonferrous metal smelting, and particularly relates to a method for drying, calcining and cooling metal slag material. The invention provides a method for drying, calcining and cooling metal slag material, which comprises the following steps of: (a) grinding; (b) dosing and mixing; (c) heap leaching; (d) drying; (e) calcining; and (f) cooling. The method provided by the invention has the beneficial effects that (1) the tail gas of a roller rotary kiln is sufficiently used, and the fuel cost is lowered; (2) the traditional time-wasting and energy-wasting ways such as manual airing, drying in a reverberatory furnace and the like are changed; (3) the tail gas generated by the roller rotary kiln is discharged after dust absorption of the high-water content slag of a dryer of the rotary kiln, the dust collection pressure is relieved, and the waste gas treatment effect is improved; (4) since a gas producer adopts electricity, heavy oil or natural gas as fuel, the problems of much smoke generated by traditional coal fuel and valuable metals in the adsorption slag caused by active carbon generated by coal are avoided; and (5) the method belongs to the semi-mechanical technology, requires few workers and ensures low labor intensity.
Description
Technical field
The invention belongs to non-ferrous metal metallurgy technical field, be specifically related to a kind of oven dry, calcining and method of cooling of metallic ore slag charge.
Background technology
Metallic ore slag charge is mainly molybdenum slag, low-grade tungsten, molybdenum, copper, tin, aluminium, tungsten slurry, mine tailing etc.
At present, in the drying course of metallic ore slag charge, be mainly to adopt artificial method of shining material and reflection bake oven material, this kind of method is consuming time, power consumption, time-consuming, effort; In the sintering process of metallic ore slag charge, the exhaust temperature that rotary kiln produces can reach 700-900 ℃, also contains a certain amount of sour gas and harmful dust in tail gas, but normally directly discharge of enterprise, caused a large amount of heat energy losses, and environment has been produced to certain pollution.
In addition, current dryer thermal source is mainly from the intrinsic thermal source generating unit of body itself, the general fuel using is moulded coal, and the gac being generated by coal also can cause adsorbing the valuable metal in slag charge, and the waste gas producing and a large amount of dust also can produce and pollute environment.
Summary of the invention
The object of the invention is for the deficiency existing in background technology, propose a kind of oven dry, calcining and method of cooling of metallic ore slag charge.
The present invention adopts following technical scheme:
The oven dry of metallic ore slag charge, calcining and a method of cooling, its step is as follows:
A. broken: metal slag charge is broken, make slag charge reach-120 order≤95%;
B. batching and spice: material slag broken in step a is pressed to the 30%-40% of metal theoretical amount, be equipped with corresponding chemical agent and auxiliary, then add water and stir;
C. dump leaching: the slag charge moisture content stirring in step b is remained within the scope of 15%-30%, cover dump leaching 24h-48h after a heap with plastic cloth;
D. dry: the slag charge of dump leaching in step c is added from the higher one end kiln tail of rotary kiln dryer, the tail gas that step e intermediate roll rotary kiln is produced is delivered to the kiln tail of the higher one end of described rotary kiln dryer by smoke discharging pipe, carry out the oven drying at low temperature in early stage of slag charge, wherein, the temperature of oven drying at low temperature is controlled at 650-750 ℃, when the temperature of described tail gas is during lower than 670 ℃, being arranged on auxiliary coal gas burner in smoke discharging pipe, lighting and carry out tail gas temperature raising, during higher than 700 ℃, stop lighting, rotation along with described rotary kiln drier body, slag charge is due to the effect of gravity, from higher one end, move to lower one end, the water content of slag charge is down to below 5%, dried slag charge is collected from bottom, described rotary kiln dryer bottom, flue gas discharges after containing the material slag dust suction of the high water yield at rotary kiln dryer,
E. calcining: the slag charge of drying in steps d is transported in cylinder rotary kiln, the gradient that keeps 3%-3.5% during described cylinder Rotary kiln installation, its working speed is 0.3-1.3 rev/min, clinkering zone slag charge temperature is controlled at 1200-1400 ℃, due to the inclination of described cylinder cylinder of rotary kiln and gyroscopic action slowly, slag charge not only along the circumferential direction rolls but also from high-end, to low side, moves vertically, by regulating gradient and rotating speed, thereby can guarantee that slag charge has the working substance Physicochemical reaction times of 1.8-2.2h in kiln;
F. cooling: the high temperature slag charge that draws off after calcining in step e to be undertaken coolingly by cooling back rotary kiln, slag charge temperature is dropped to below 100 ℃, be delivered to feed bin, for subsequent handling.
Chemical agent described in step b can be sodium carbonate or sheet alkali, and described auxiliary can be nitre, quartz or aluminum oxide.
Auxiliary coal gas burner described in steps d is connected with thermal source generator producer gas generator, described producer gas generator can be simultaneously for cylinder rotary kiln and rotary kiln dryer provide thermal source, it is fuel that described producer gas generator can use heavy oil or Sweet natural gas.
As the preferred embodiment of the present invention, in steps d, on described rotary kiln dryer cylinder Inner wall, flight is also housed, its effect is that slag charge is taken up and spilt down, the surface in contact of expecting slag and described tail gas is increased, to improve drying rate and to promote material to move ahead.
As the preferred embodiment of the present invention, in step e, the slag charge of drying in steps d is transported in cylinder rotary kiln, during described cylinder Rotary kiln installation, keep 3.2% gradient, its working speed is 1 rev/min, clinkering zone slag charge temperature is controlled at 1250-1350 ℃.
As the preferred embodiment of the present invention, the diameter of the cylinder of described cylinder rotary kiln is 2-2.5m, the length of the cylinder of described cylinder rotary kiln is 26-30m, the diameter of the cylinder of described rotary kiln dryer is 0.9-1.2m, the length of the cylinder of described rotary kiln dryer is 9-11m, the diameter of the described cylinder that cools back rotary kiln is 0.7-0.85m, and the length of the described cylinder that cools back rotary kiln is 7.2-8.5m.
As the preferred embodiment of the present invention, the diameter of the cylinder of described cylinder rotary kiln is 2.22m, the length of the cylinder of described cylinder rotary kiln is 28m, the diameter of the cylinder of described rotary kiln dryer is 1.02m, the length of the cylinder of described rotary kiln dryer is 10m, the diameter of the described cylinder that cools back rotary kiln is 0.82m, and the length of the described cylinder that cools back rotary kiln is 8m.
As the preferred embodiment of the present invention, in step f, high temperature slag charge enters and cools back rotary kiln through chute, described chute is rotary type, spray equipment is arranged at the described top that cools back rotary kiln, water circulating pump is arranged at bottom, in the described outside trickle cooling that cools back rotary kiln, the described inside that cools back rotary kiln is provided with copies stream plate, be convenient to material with described in cool back large as far as possible the contacting of inwall of rotary kiln, to reach good cooling-down effect, when slag charge moves to outlet from the described entrance that cools back rotary kiln, temperature of charge drops to below 100 ℃, slag charge enters bucket elevator subsequently, the power of described bucket elevator is buncher, can adjusting discharge capacity, described bucket elevator is sent slag charge into feed bin, described feed bin lower part outlet place is provided with rotary disc feeder, while preparing against out slag charge, use.
The invention has the beneficial effects as follows: 1. make the tail gas of cylinder rotary kiln be fully used, reduced fuel cost; 2. changed the way of traditional time-consuming, power consumption such as artificial solarization material, reflection bake oven material; 3. the tail gas that cylinder rotary kiln produces discharges containing after the slag charge dust suction of the high water yield by rotary kiln dryer, has alleviated the pressure that gathers dust, and has improved off gas treatment effect; 4. described producer gas generator use heavy oil or Sweet natural gas are fuel, the volume of smoke of having avoided traditional coal fuel to produce, and avoided the gac being generated by coal to cause adsorbing the valuable metal in slag charge, reduced fuel cost simultaneously; 5. method of the present invention belongs to semi-mechanization technique, and required post personnel are few, and work Strong degree is low.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Embodiment 1:
The oven dry of metallic ore slag charge, calcining and a method of cooling, its step is as follows:
A. broken: metal molybdenum slag slag charge is broken, make slag charge reach-120 Mu≤95%;
B. batching and spice: material slag broken in step a is pressed to 30% of metal theoretical amount, be equipped with corresponding sodium carbonate and nitre, then add water and stir;
C. dump leaching: the slag charge moisture content stirring in step b is remained in 15% scope, cover dump leaching 24h after a heap with plastic cloth;
D. dry: the slag charge of dump leaching in step c is added from the higher one end kiln tail of rotary kiln dryer, the tail gas that step e intermediate roll rotary kiln is produced is delivered to the kiln tail of the higher one end of described rotary kiln dryer by smoke discharging pipe, carry out the oven drying at low temperature in early stage of slag charge, wherein, the temperature of oven drying at low temperature is controlled at 650-750 ℃, when the temperature of described tail gas is during lower than 670 ℃, being arranged on auxiliary coal gas burner in smoke discharging pipe, lighting and carry out tail gas temperature raising, described auxiliary coal gas burner is connected with thermal source generator producer gas generator, described producer gas generator can be simultaneously provides thermal source for cylinder rotary kiln and rotary kiln dryer, it is fuel that described producer gas generator uses heavy oil or Sweet natural gas, during higher than 700 ℃, stop lighting, rotation along with described rotary kiln drier body, slag charge moves to lower one end from higher one end, the water content of slag charge is down to below 5%, dried slag charge is collected from bottom, described rotary kiln dryer bottom, flue gas discharges after containing the material slag dust suction of the high water yield at rotary kiln dryer,
E. calcining: the slag charge of drying in steps d is transported in cylinder rotary kiln, during described cylinder Rotary kiln installation, keep 3% gradient, its working speed is 0.3 rev/min, and clinkering zone slag charge temperature is controlled at 1200-1400 ℃, and slag charge has the working substance Physicochemical reaction times of 2.2h in kiln;
F. cooling: the high temperature slag charge drawing off after calcining in step e is undertaken cooling by cooling back rotary kiln, high temperature slag charge enters and cools back rotary kiln through chute, described chute is rotary type, spray equipment is arranged at the described top that cools back rotary kiln, water circulating pump is arranged at bottom, in the described outside trickle cooling that cools back rotary kiln, the described inside that cools back rotary kiln is provided with copies stream plate, when slag charge moves to outlet from the described entrance that cools back rotary kiln, temperature of charge drops to below 100 ℃, slag charge enters bucket elevator subsequently, the power of described bucket elevator is buncher, described bucket elevator is sent slag charge into feed bin, described feed bin lower part outlet place is provided with rotary disc feeder, while preparing against out slag charge, use.
In the present embodiment, the diameter of the cylinder of described cylinder rotary kiln is 2m, the length of the cylinder of described cylinder rotary kiln is 26m, the diameter of the cylinder of described rotary kiln dryer is 0.9m, the length of the cylinder of described rotary kiln dryer is 9m, the diameter of the described cylinder that cools back rotary kiln is 0.7m, and the length of the described cylinder that cools back rotary kiln is 7.2m.
Embodiment 2:
The oven dry of metallic ore slag charge, calcining and a method of cooling, its step is as follows:
A. broken: low-grade tungsten slag charge is broken, make slag charge reach-120 Mu≤95%;
B. batching and spice: material slag broken in step a is pressed to 40% of metal theoretical amount, be equipped with corresponding sodium carbonate and quartz, then add water and stir;
C. dump leaching: the slag charge moisture content stirring in step b is remained in 30% scope, cover dump leaching 48h after a heap with plastic cloth;
D. dry: the slag charge of dump leaching in step c is added from the higher one end kiln tail of rotary kiln dryer, the tail gas that step e intermediate roll rotary kiln is produced is delivered to the kiln tail of the higher one end of described rotary kiln dryer by smoke discharging pipe, carry out the oven drying at low temperature in early stage of slag charge, wherein, the temperature of oven drying at low temperature is controlled at 650-750 ℃, when the temperature of described tail gas is during lower than 670 ℃, being arranged on auxiliary coal gas burner in smoke discharging pipe, lighting and carry out tail gas temperature raising, described auxiliary coal gas burner is connected with thermal source generator producer gas generator, described producer gas generator can be simultaneously provides thermal source for cylinder rotary kiln and rotary kiln dryer, it is fuel that described producer gas generator uses heavy oil or Sweet natural gas, during higher than 700 ℃, stop lighting, rotation along with described rotary kiln drier body, slag charge moves to lower one end from higher one end, the water content of slag charge is down to below 5%, dried slag charge is collected from bottom, described rotary kiln dryer bottom, flue gas discharges after containing the material slag dust suction of the high water yield at rotary kiln dryer,
E. calcining: the slag charge of drying in steps d is transported in cylinder rotary kiln, during described cylinder Rotary kiln installation, keep 3.5% gradient, its working speed is 1.3 revs/min, and clinkering zone slag charge temperature is controlled at 1200-1400 ℃, and slag charge has the working substance Physicochemical reaction times of 1.8h in kiln;
F. cooling: the high temperature slag charge drawing off after calcining in step e is undertaken cooling by cooling back rotary kiln, high temperature slag charge enters and cools back rotary kiln through chute, described chute is rotary type, spray equipment is arranged at the described top that cools back rotary kiln, water circulating pump is arranged at bottom, in the described outside trickle cooling that cools back rotary kiln, the described inside that cools back rotary kiln is provided with copies stream plate, when slag charge moves to outlet from the described entrance that cools back rotary kiln, temperature of charge drops to below 100 ℃, slag charge enters bucket elevator subsequently, the power of described bucket elevator is buncher, described bucket elevator is sent slag charge into feed bin, described feed bin lower part outlet place is provided with rotary disc feeder, while preparing against out slag charge, use.
In the present embodiment, the diameter of the cylinder of described cylinder rotary kiln is 2.5m, the length of the cylinder of described cylinder rotary kiln is 30m, the diameter of the cylinder of described rotary kiln dryer is 1.2m, the length of the cylinder of described rotary kiln dryer is 11m, the diameter of the described cylinder that cools back rotary kiln is 0.85m, and the length of the described cylinder that cools back rotary kiln is 8.5m.
Embodiment 3:
The oven dry of metallic ore slag charge, calcining and a method of cooling, its step is as follows:
A. broken: cupric slag charge is broken, make slag charge reach-120 Mu≤95%;
B. batching and spice: material slag broken in step a is pressed to 35% of metal theoretical amount, be equipped with corresponding sheet alkali or aluminum oxide, then add water and stir;
C. dump leaching: the slag charge moisture content stirring in step b is remained in 20% scope, cover dump leaching 36h after a heap with plastic cloth;
D. dry: the slag charge of dump leaching in step c is added from the higher one end kiln tail of rotary kiln dryer, the tail gas that step e intermediate roll rotary kiln is produced is delivered to the kiln tail of the higher one end of described rotary kiln dryer by smoke discharging pipe, carry out the oven drying at low temperature in early stage of slag charge, wherein, the temperature of oven drying at low temperature is controlled at 650-750 ℃, when the temperature of described tail gas is during lower than 670 ℃, being arranged on auxiliary coal gas burner in smoke discharging pipe, lighting and carry out tail gas temperature raising, described auxiliary coal gas burner is connected with thermal source generator producer gas generator, described producer gas generator can be simultaneously provides thermal source for cylinder rotary kiln and rotary kiln dryer, it is fuel that described producer gas generator uses heavy oil or Sweet natural gas, during higher than 700 ℃, stop lighting, on described rotary kiln dryer cylinder Inner wall, flight is also housed, its effect is that slag charge is taken up and spilt down, the surface in contact of expecting slag and described tail gas is increased, to improve drying rate and to promote material to move ahead, rotation along with described rotary kiln drier body, slag charge moves to lower one end from higher one end, the water content of slag charge is down to below 5%, dried slag charge is collected from bottom, described rotary kiln dryer bottom, flue gas discharges after containing the material slag dust suction of the high water yield at rotary kiln dryer,
E. calcining: the slag charge of drying in steps d is transported in cylinder rotary kiln, during described cylinder Rotary kiln installation, keep 32% gradient, its working speed is 1 rev/min, and clinkering zone slag charge temperature is controlled at 1250-1350 ℃, and slag charge has the working substance Physicochemical reaction times of 2h in kiln;
F. cooling: the high temperature slag charge drawing off after calcining in step e is undertaken cooling by cooling back rotary kiln, high temperature slag charge enters and cools back rotary kiln through chute, described chute is rotary type, spray equipment is arranged at the described top that cools back rotary kiln, water circulating pump is arranged at bottom, in the described outside trickle cooling that cools back rotary kiln, the described inside that cools back rotary kiln is provided with copies stream plate, when slag charge moves to outlet from the described entrance that cools back rotary kiln, temperature of charge drops to below 100 ℃, slag charge enters bucket elevator subsequently, the power of described bucket elevator is buncher, described bucket elevator is sent slag charge into feed bin, described feed bin lower part outlet place is provided with rotary disc feeder, while preparing against out slag charge, use.
In the present embodiment, the diameter of the cylinder of described cylinder rotary kiln is 2.22m, the length of the cylinder of described cylinder rotary kiln is 28m, the diameter of the cylinder of described rotary kiln dryer is 1.02m, the length of the cylinder of described rotary kiln dryer is 10m, the diameter of the described cylinder that cools back rotary kiln is 0.82m, and the length of the described cylinder that cools back rotary kiln is 8m.
The above embodiment has only expressed the preferred embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion, improvement and substitute, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the oven dry of metallic ore slag charge, calcining and a method of cooling, is characterized in that, its step is as follows:
A. broken: metal slag charge is broken, make slag charge reach-120 order≤95%;
B. batching and spice: slag charge broken in step a is pressed to the 30%-40% of metal theoretical amount, be equipped with corresponding chemical agent and auxiliary, then add water and stir;
C. dump leaching: the slag charge moisture content stirring in step b is remained within the scope of 15%-30%, cover dump leaching 24h-48h after a heap with plastic cloth;
D. dry: the slag charge of dump leaching in step c is added from the higher one end kiln tail of rotary kiln dryer, the tail gas that step e intermediate roll rotary kiln is produced is delivered to the kiln tail of the higher one end of described rotary kiln dryer by smoke discharging pipe, carry out the oven drying at low temperature in early stage of slag charge, wherein, the temperature of oven drying at low temperature is controlled at 650-750 ℃, when the temperature of described tail gas is during lower than 670 ℃, being arranged on auxiliary coal gas burner in smoke discharging pipe, lighting and carry out tail gas temperature raising, during higher than 700 ℃, stop lighting, rotation along with described rotary kiln drier body, slag charge moves to lower one end from higher one end, the water content of slag charge is down to below 5%, dried slag charge is collected from bottom, described rotary kiln dryer bottom, flue gas discharges after containing the slag charge dust suction of the high water yield at rotary kiln dryer,
E. calcining: the slag charge of drying in steps d is transported in cylinder rotary kiln, the gradient that keeps 3%-3.5% during described cylinder Rotary kiln installation, its working speed is 0.3-1.3 rev/min, clinkering zone slag charge temperature is controlled at 1200-1400 ℃, guarantees that slag charge has the working substance Physicochemical reaction times of 1.8-2.2h in kiln;
F. cooling: the high temperature slag charge that draws off after calcining in step e to be undertaken coolingly by cooling back rotary kiln, slag charge temperature is dropped to below 100 ℃, be delivered to feed bin, for subsequent handling.
2. the oven dry of a kind of metallic ore slag charge according to claim 1, calcining and method of cooling, is characterized in that, the chemical agent described in step b can be sodium carbonate or sheet alkali, and described auxiliary can be nitre, quartz or aluminum oxide.
3. the oven dry of a kind of metallic ore slag charge according to claim 1, calcining and method of cooling, is characterized in that, the auxiliary coal gas burner described in steps d is connected with thermal source generator producer gas generator.
4. the oven dry of a kind of metallic ore slag charge according to claim 3, calcining and method of cooling, is characterized in that, described producer gas generator can be simultaneously provides thermal source for cylinder rotary kiln and rotary kiln dryer.
5. the oven dry of a kind of metallic ore slag charge according to claim 3, calcining and method of cooling, is characterized in that, it is fuel that described producer gas generator can use heavy oil or Sweet natural gas.
6. the oven dry of a kind of metallic ore slag charge according to claim 1, calcining and method of cooling, is characterized in that, in steps d, on described rotary kiln dryer cylinder Inner wall, flight is also housed.
7. the oven dry of a kind of metallic ore slag charge according to claim 1, calcining and method of cooling, it is characterized in that, in step e, the slag charge of drying in steps d is transported in cylinder rotary kiln, during described cylinder Rotary kiln installation, keep 3.2% gradient, its working speed is 1 rev/min, and clinkering zone slag charge temperature is controlled at 1250-1350 ℃.
8. the oven dry of a kind of metallic ore slag charge according to claim 1, calcining and method of cooling, it is characterized in that, the diameter of the cylinder of described cylinder rotary kiln is 2-2.5m, the length of the cylinder of described cylinder rotary kiln is 26-30m, the diameter of the cylinder of described rotary kiln dryer is 0.9-1.2m, the length of the cylinder of described rotary kiln dryer is 9-11m, the diameter of the described cylinder that cools back rotary kiln is 0.7-0.85m, and the length of the described cylinder that cools back rotary kiln is 7.2-8.5m.
9. the oven dry of a kind of metallic ore slag charge according to claim 1, calcining and method of cooling, it is characterized in that, the diameter of the cylinder of described cylinder rotary kiln is 2.22m, the length of the cylinder of described cylinder rotary kiln is 28m, the diameter of the cylinder of described rotary kiln dryer is 1.02m, the length of the cylinder of described rotary kiln dryer is 10m, and the diameter of the described cylinder that cools back rotary kiln is 0.82m, and the length of the described cylinder that cools back rotary kiln is 8m.
10. the oven dry of a kind of metallic ore slag charge according to claim 1, calcining and method of cooling, it is characterized in that, in step f, high temperature slag charge enters and cools back rotary kiln through chute, described chute is rotary type, spray equipment is arranged at the described top that cools back rotary kiln, water circulating pump is arranged at bottom, in the described outside trickle cooling that cools back rotary kiln, the described inside that cools back rotary kiln is provided with copies stream plate, when slag charge moves to outlet from the described entrance that cools back rotary kiln, temperature of charge drops to below 100 ℃, slag charge enters bucket elevator subsequently, described bucket elevator is sent slag charge into feed bin, described feed bin lower part outlet place is provided with rotary disc feeder.
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| CN104567283A (en) * | 2013-10-10 | 2015-04-29 | 宁夏琪凯节能设备有限公司 | Novel energy-saving slag dryer |
| CN103528347A (en) * | 2013-11-05 | 2014-01-22 | 宁夏新航能源环境科技有限公司 | Energy-saving dryer |
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| CN1156762A (en) * | 1996-02-06 | 1997-08-13 | 段旭川 | Process for directly producing cadmium sulfate from zinc cadmium slag |
| CN101709388A (en) * | 2009-12-09 | 2010-05-19 | 攀钢集团攀枝花钢钒有限公司 | Process for separating vanadium by chloridizing and roasting vanadium slag |
| CN101824544A (en) * | 2010-04-12 | 2010-09-08 | 池煊庆 | Comprehensive recovery method for smelted lead waste slag of blast furnace |
| CN101830707A (en) * | 2010-03-29 | 2010-09-15 | 郑州市磊鑫实业有限公司 | Method for producing baked bricks from alumina red mud |
| CN102154559A (en) * | 2011-04-12 | 2011-08-17 | 郴州市金龙铁合金有限公司 | Process for extracting vanadium from vanadium slag containing phosphorus at low temperature |
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Patent Citations (5)
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|---|---|---|---|---|
| CN1156762A (en) * | 1996-02-06 | 1997-08-13 | 段旭川 | Process for directly producing cadmium sulfate from zinc cadmium slag |
| CN101709388A (en) * | 2009-12-09 | 2010-05-19 | 攀钢集团攀枝花钢钒有限公司 | Process for separating vanadium by chloridizing and roasting vanadium slag |
| CN101830707A (en) * | 2010-03-29 | 2010-09-15 | 郑州市磊鑫实业有限公司 | Method for producing baked bricks from alumina red mud |
| CN101824544A (en) * | 2010-04-12 | 2010-09-08 | 池煊庆 | Comprehensive recovery method for smelted lead waste slag of blast furnace |
| CN102154559A (en) * | 2011-04-12 | 2011-08-17 | 郴州市金龙铁合金有限公司 | Process for extracting vanadium from vanadium slag containing phosphorus at low temperature |
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