CN101525685B - High-alkali clinker sodium roasting hydrometallurgy method - Google Patents
High-alkali clinker sodium roasting hydrometallurgy method Download PDFInfo
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- CN101525685B CN101525685B CN2009100109893A CN200910010989A CN101525685B CN 101525685 B CN101525685 B CN 101525685B CN 2009100109893 A CN2009100109893 A CN 2009100109893A CN 200910010989 A CN200910010989 A CN 200910010989A CN 101525685 B CN101525685 B CN 101525685B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000009854 hydrometallurgy Methods 0.000 title claims abstract description 9
- 239000003513 alkali Substances 0.000 title claims abstract description 7
- 239000011734 sodium Substances 0.000 title claims description 13
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 title claims description 12
- 229910052708 sodium Inorganic materials 0.000 title claims description 12
- 239000000463 material Substances 0.000 claims abstract description 50
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 159000000000 sodium salts Chemical class 0.000 claims abstract description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 50
- 235000017550 sodium carbonate Nutrition 0.000 claims description 25
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 25
- 150000001875 compounds Chemical class 0.000 claims description 21
- 238000013467 fragmentation Methods 0.000 claims description 16
- 238000006062 fragmentation reaction Methods 0.000 claims description 16
- 238000002360 preparation method Methods 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 238000007363 ring formation reaction Methods 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 8
- 239000002918 waste heat Substances 0.000 claims description 7
- 239000003034 coal gas Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 235000010755 mineral Nutrition 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 239000012257 stirred material Substances 0.000 claims description 6
- 235000009508 confectionery Nutrition 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 4
- 239000003345 natural gas Substances 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 238000002386 leaching Methods 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 230000004523 agglutinating effect Effects 0.000 claims description 2
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 claims description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 239000003245 coal Substances 0.000 claims description 2
- 238000007667 floating Methods 0.000 claims description 2
- 239000000446 fuel Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000011490 mineral wool Substances 0.000 claims description 2
- 239000003500 flue dust Substances 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000005484 gravity Effects 0.000 claims 1
- 238000004321 preservation Methods 0.000 claims 1
- 238000004062 sedimentation Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 11
- 229910052804 chromium Inorganic materials 0.000 description 11
- 239000011651 chromium Substances 0.000 description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 10
- 229910052750 molybdenum Inorganic materials 0.000 description 10
- 239000011733 molybdenum Substances 0.000 description 10
- 229910052759 nickel Inorganic materials 0.000 description 7
- 239000002893 slag Substances 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 238000005245 sintering Methods 0.000 description 6
- 229910052720 vanadium Inorganic materials 0.000 description 6
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 230000004927 fusion Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- VEUACKUBDLVUAC-UHFFFAOYSA-N [Na].[Ca] Chemical compound [Na].[Ca] VEUACKUBDLVUAC-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- Y02W30/54—
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a high-alkali clinker sodium salt roasting hydrometallurgy method. The method comprises the following steps: step 1, crushing raw materials; step 2, preparing hypermatic clinker; step 3, preparing a mixture; and step 4, preparing roasting clinker. Ore raw materials are roasted into the clinker after the four working steps for clinching metal substances therein. The method overcomes the defects that materials in the roasting process are smelted to be thick and are easy to sinter so as to form rings, effectively recycles the reaction heat of the roasted materials, realizes the full utilization of the heat energy, has the advantages of energy saving, environmental protection and circulating economy and is suitable for the automated production application of an industrialized rotary kiln, such as the sodium salt roasting of hypermatic substances at high temperature.
Description
Technical field
What the present invention proposed is that the hydrometallurgy field is used for the method that the industrial rotary kiln Halogen does not have calcium sodium roasting metalliferous mineral or waste residue grog, specifically a kind of method of high-alkali clinker sodium salt roasting hydrometallurgy.
Background technology
The hydrometallurgy industry is extracted highly purified metallic salt or oxide compound from metalliferous mineral or waste residue first procedure is a sodium salt roasting clinker, and purpose is to make the metal that is extracted be converted into the sodium salt of solubility, just can carry out the processing of the degree of depth and purify.The sodium roasting method of widespread use has three kinds in the world at present:
The one, when being main additive, add an amount of NaCl or Na with soda ash
2SO
4, purpose is to improve the metal that is extracted transforms soluble sodium salt in roasting process ratio.Its negative effect is the CI that produces
2And SO
2, serious environment pollution, and this method is applicable to that the add-on of soda ash is less than 60% of metalliferous mineral that is extracted or waste residue add-on.
The 2nd, when the add-on of soda ash is 0.6～0.8 with the metalliferous mineral or the waste residue weight ratio that are extracted: in the time of 1, because the compound reaction is violent under the high temperature, emit a large amount of heats, make reaction mass in kiln, be fusion thickness state, the easy inwall of bonding rotary kiln and very easily produce the sintering ring formation, production can't be carried out, so some inert fillers such as the leached mud of common this kind of adding grog or lime solve the problem of reaction mass thickness and easy-sintering ring formation.Its negative effect is artificially to have reduced the content that is extracted metal in the reaction mass, and thermopositive reaction is not obvious, causes the sodium roasting process energy consumption of unit product obviously to improve, and the water, electricity, the vapour consumption that cause leaching operation simultaneously also obviously increase.
The 3rd, in order to solve material thickness easy-sintering ring formation problem under the high temperature, be additive with a large amount of unslaked lime or Wingdale, its negative effect one is to strengthen the waste residue amount of subsequent handling, takies a large amount of soils and stores, and dust polluting environment; The 2nd, the roasting transformation efficiency that is extracted metal is low, and the total yield that causes being extracted metal reduces, the waste resource; The 3rd, might form deleterious hazardous solid waste (as CaCrO
4), form secondary pollution.
Summary of the invention
Be fusion thickness state in order to solve the high alkali number sodium roasting of hydrometallurgy process reaction material, the technical barrier of easily bond rotary kiln inwall and easy-sintering ring formation, the present invention proposes a kind of method of high-alkali clinker sodium salt roasting hydrometallurgy.This method solves material fusion thickness, easy-sintering ring formation, and the technical problem of efficient recovery roasting material reaction heat.
The scheme that technical solution problem of the present invention is taked is:
1, raw material crushing: metalliferous mineral or the waste residue that will prepare to extract with crusher and ball mill are crushed to 120～180 orders, obtain broken raw material.
2, prepared sticking grog: with soda ash and the abundant mixing of broken raw material, put in the reverberatory furnace, with coal or coal gas is fuel, roasting is 30～90 minutes under 500～800 ℃ condition, manually fully stirred material one time every 20 minutes during this time, and make its fragmentation, go to not heavy-gravity loose condition (of surface) by the thickness molten state until material with the material that spades impacts thickness caking with spades, further be crushed to 20～80 orders after material clawed in the stove, be prepared into and be sticking grog.
3, preparation compound: with soda ash and broken raw material by 0.6～0.8: 1 mass ratio adding; The add-on of crossing sticking grog is 30%～90%, three kinds of materials of broken material quantity and soda ash amount sum accurately after the metering by mass ratio, and mixing obtaining compound in mixer.
4, roasting grog preparation: with coal gas or Sweet natural gas the temperature of kiln hood is risen to 800～1000 ℃ according to the rotary kiln heating curve, by the kiln tail compound is dropped in the rotary kiln through material feeder with lift, compound generation thermopositive reaction, kiln end temperature rises to 800～1000 ℃, and the material in 5 meters on the kiln tail is half thickness state; Under the normal condition of the gentle secondary air of kiln, the phenomenon of no ring formation in the kiln; The heat that the thermopositive reaction of kiln tail material self produces, the temperature maintenance that can make about 20 meters on kiln tail is at 800～1000 ℃; The time of whole sodium roasting is 4～8 hours.The grog that roasting is good is flowed out by kiln hood, through the screening of 100 * 100mm mesh, the small quantity of clinker piece is separated, and naturally cooling returns the kiln tail as crossing sticking grog; Grog by 100mm * 100mm mesh is lowered the temperature through cooler, carries after blade of a sword formula fine crusher is pulverized to the grog storehouse and using for leaching.Halogen does not have and is extracted the ratio that metal is converted into soluble sodium salt in the grog behind the calcium sodium roasting and all reaches more than 95%.
The inventive method overcomes material roasting process material fusion thickness, easy-sintering ring formation and efficient recovery roasting material reaction heat, realized making full use of of heat energy, characteristics with energy-saving and environmental protection and recycling economy, suitable for industrial the rotary kiln at high temperature automatic production of sodium roasting high-viscosity material are used.
Description of drawings
Fig. 1 is the inventive method operational flowchart
Embodiment
Embodiment 1: the sodium roasting that contains the industrial spent catalyst of vanadium, molybdenum and phosphorus
The industrial spent catalyst that will contain vanadium, molybdenum and phosphorus is criticized according to 800 tons of groups, fully after the homogenizing, pulverizes 120 orders, obtains broken spent catalyst.
Broken spent catalyst per ton adds 1.3 tons of soda ash, carry out abundant mixing at mixer, drop in the reverberatory furnace then, under 500 ℃ condition, carry out roasting 30 minutes, manually fully stirred material one time every 20 minutes during this time, and make its fragmentation, transfer not heavy-gravity loose condition (of surface) to until material with the material that spades impacts thickness caking with spades, further be crushed to 20 orders after material clawed in the stove, be prepared into and be sticking grog.
The spent catalyst of fragmentation, the sticking grog of mistake and the soda ash of preparation are carried out thorough mixing in proportion in mixer, prepare blended stock, wherein the mass ratio of Po Sui spent catalyst and soda ash is 1: 1.3, and the add-on of crossing sticking grog is broken catalytic amount and soda ash amount sum 60%.
The compound for preparing is dropped into rotary kiln (the long 60m of kiln, internal diameter φ 3.5m) by feed bin carry out roasting, roasting time is 6 hours, and control kiln hood and kiln end temperature are respectively 1000 ℃ and 900 ℃, and rotary kiln uses coal gas to carry out direct heating; Material after the roasting draws off automatically from kiln hood, carries out the mesh screening, pulverizes greater than the material piece process of φ 100mm, replace the sticking grog of mistake of preparation to be used for the compound preparation, particle diameter prepares grog less than cooling of material piece process and the fragmentation of φ 100mm, leaches and reclaims vanadium, molybdenum.
Embodiment 2: the sodium roasting that contains vanadium, chromium and phosphorus industrial slag
To contain vanadium, chromium and phosphorus industrial slag and criticize, fully after the homogenizing, be crushed to 180 orders, obtain broken industrial slag according to 1000 tons of groups.
Broken industrial slag per ton adds 0.8 ton of soda ash, carry out abundant mixing at mixer, drop in the reverberatory furnace then, under 800 ℃ condition, carry out roasting 60 minutes, manually fully stirred material one time every 20 minutes during this time, and make its fragmentation, transfer not heavy-gravity loose condition (of surface) to until material with the material that spades impacts thickness caking with spades, further be crushed to 80 orders after material clawed in the stove, be prepared into and be sticking grog.
The industrial slag of fragmentation, the sticking grog of mistake and the soda ash of preparation are carried out thorough mixing in proportion in mixer, prepare blended stock, wherein soda ash is 0.8: 1 with the industrial slag amount ratio of fragmentation, and the add-on of crossing sticking grog is the broken industrial quantity of slag and soda ash amount sum 30%.
The compound for preparing is dropped into rotary kiln (the long 30m of kiln, internal diameter φ 2.5m) by feed bin carry out roasting, roasting time is 4 hours, and control kiln hood and kiln end temperature are respectively 900 ℃ and 750 ℃, and rotary kiln uses Sweet natural gas to carry out direct heating; Material after the roasting draws off automatically from kiln hood, carries out the mesh screening, pulverizes greater than the material piece process of φ 100mm, replace the sticking grog of mistake of preparation to be used for the compound preparation, particle diameter prepares grog less than cooling of material piece process and the fragmentation of φ 100mm, leaches and reclaims vanadium, chromium.
Embodiment 3: chromium, iron ore sodium roasting
Chromium, iron ore are criticized according to 900 tons of groups, fully after the homogenizing, be crushed to 150 orders, obtain broken chromite.
Broken chromium per ton, iron ore add 1.1 tons of soda ash, carry out abundant mixing at mixer, drop in the reverberatory furnace then, under 700 ℃ condition, carry out roasting 90 minutes, manually fully stirred material one time every 20 minutes during this time, and make its fragmentation, transfer not heavy-gravity loose condition (of surface) to until material with the material that spades impacts thickness caking with spades, further be crushed to 50 orders after material clawed in the stove, be prepared into and be sticking grog.
Sticking grog of the mistake of the chromium of fragmentation, iron ore, preparation and soda ash are carried out thorough mixing in proportion in mixer, prepare blended stock, wherein the weight ratio of Po Sui chromium, iron ore and soda ash is 1: 1.1, and the add-on of crossing sticking grog is 90% of broken chromium, iron ore amount and a soda ash amount sum.
The compound for preparing is dropped into rotary kiln (the long 50m of kiln, internal diameter φ 2.5m) by feed bin carry out roasting, roasting time is 8 hours, and control kiln hood and kiln end temperature are respectively 900 ℃ and 750 ℃, and rotary kiln uses Sweet natural gas to carry out direct heating; Material after the roasting draws off automatically from kiln hood, carries out the mesh screening, pulverizes greater than the material piece process of φ 100mm, replace the sticking grog of mistake of preparation to be used for the compound preparation, particle diameter prepares grog less than cooling of material piece process and the fragmentation of φ 100mm, leaches recovery chromium.
Embodiment 4: the sodium roasting of higher-grade nickel, molybdenum ore
Nickel, molybdenum ore are criticized according to 800 tons of groups, fully after the homogenizing, pulverized 120 orders, obtain broken nickel, molybdenum ore.
Broken nickel per ton, molybdenum ore add 0.6 ton of soda ash, carry out abundant mixing at mixer, drop in the reverberatory furnace then, under 500 ℃ condition, carry out roasting 90 minutes, manually fully stirred material one time every 20 minutes during this time, and make its fragmentation, transfer not heavy-gravity loose condition (of surface) to until material with the material that spades impacts thickness caking with spades, further be crushed to 20 orders after material clawed in the stove, be prepared into and be sticking grog.
Sticking grog of the mistake of the nickel of fragmentation, molybdenum ore, preparation and soda ash are carried out thorough mixing in proportion in mixer, prepare blended stock, wherein soda ash is 0.6: 1 with nickel, the molybdenum ore mass ratio of fragmentation, and the add-on of crossing sticking grog is 40% of broken nickel, molybdenum ore amount and a soda ash amount sum.
The compound for preparing is dropped into rotary kiln (the long 40m of kiln, internal diameter φ 2m) by feed bin carry out roasting, roasting time is 5 hours, and control kiln hood and kiln end temperature are respectively 800 ℃ and 750 ℃, and rotary kiln uses coal gas to carry out direct heating; Material after the roasting draws off automatically from kiln hood, carries out the mesh screening, pulverizes greater than the material piece process of φ 100mm, replace the sticking grog of mistake of preparation to be used for the compound preparation, particle diameter prepares grog less than cooling of material piece process and the fragmentation of φ 100mm, leaches recovery chromium.
Thermopositive reaction takes place when dropping into the kiln tail in compound at once, makes the temperature of kiln tail continue to reach 800～1000 ℃.In order fully effectively to utilize this heat, its measure is:
1, smoke-box and the flue to the kiln tail carries out encapsulation process, prevents that heat from distributing leakage.
2, take pure aluminium silicate and rock wool compound to flue insulation between kiln tail smoke-box and waste heat boiler.
3,, design, make, install the waste heat steam boiler of supporting thermo-efficiency 〉=75%, boiler exhaust gas temperature＜270 ℃ according to flue-gas temperature, flow and flow velocity; Supporting automatic dustfall of boiler and regular cleaning apparatus, waste heat boiler regularly use the pressurized air of 0.6Mpa to remove boiler heat exchange pipeline outer wall agglutinating floating dust through fire door.
4, waste heat boiler afterbody outfit dust chamber carries out dedusting.
Claims (2)
1. the method for a high-alkali clinker sodium salt roasting hydrometallurgy is characterized in that:
(1), raw material crushing: metalliferous mineral or the waste residue that will prepare to extract with crusher and ball mill are crushed to 120～180 orders, obtain broken raw material;
(2), prepared sticking grog: with soda ash and the abundant mixing of broken raw material, put in the reverberatory furnace, with coal or coal gas is fuel, roasting is 30～90 minutes under 500～800 ℃ condition, manually fully stirred material one time every 20 minutes during this time, and make its fragmentation, go to not heavy-gravity loose condition (of surface) by the thickness molten state until material with the material that spades impacts thickness caking with spades, further be crushed to 20～80 orders after material clawed in the stove, be prepared into and be sticking grog;
(3), preparation compound: with soda ash and broken raw material by 0.6～0.8: 1 mass ratio adding; The add-on of crossing sticking grog is 30%～90%, three kinds of materials of broken material quantity and soda ash amount sum accurately after the metering by mass ratio, and mixing obtaining compound in mixer;
(4), roasting grog preparation: with coal gas or Sweet natural gas the temperature of kiln hood is risen to 800～1000 ℃ according to the rotary kiln heating curve, by the kiln tail compound is dropped in the rotary kiln through material feeder with lift, compound generation thermopositive reaction, kiln end temperature rises to 800～1000 ℃, and the material in 5 meters on the kiln tail is half thickness state; Under the normal condition of the gentle secondary air of kiln, the phenomenon of no ring formation in the kiln; The heat that the thermopositive reaction of kiln tail material self produces, the temperature maintenance that can make about 20 meters on kiln tail is at 800～1000 ℃; The time of whole sodium roasting is 4～8 hours; The grog that roasting is good is flowed out by kiln hood, through the screening of 100 * 100mm mesh, the small quantity of clinker piece is separated, and naturally cooling returns the kiln tail as crossing sticking grog; Grog by 100mm * 100mm mesh is lowered the temperature through cooler, carries after blade of a sword formula fine crusher is pulverized to the grog storehouse and using for leaching.
2. sodium roasting method according to claim 1, it is characterized in that: the long 30～60m of described rotary kiln, internal diameter φ 2～3.5m, the kiln exit gas main channel seals, its outside surface pure aluminium silicate and rock wool heat-preservation layer, and waste heat steam boiler is installed, flue dust in recovery waste heat and the flue gas on flue collector, through discharging after the gravity settling chamber sedimentation, the flue dust of recovery is used to prepare compound to flue gas again; Waste heat boiler regularly uses the pressurized air of 0.6MPa to remove boiler heat exchange pipeline outer wall agglutinating floating dust through fire door.
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|---|---|---|---|
| CN2009100109893A CN101525685B (en) | 2009-04-02 | 2009-04-02 | High-alkali clinker sodium roasting hydrometallurgy method |
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|---|---|---|---|
| CN2009100109893A CN101525685B (en) | 2009-04-02 | 2009-04-02 | High-alkali clinker sodium roasting hydrometallurgy method |
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| CN102219260A (en) * | 2010-04-14 | 2011-10-19 | 湖南荣宏钼业材料股份有限公司 | Calcination method for producing ammonium molybdate from high-impurity ferromolybdenum alloy |
| CN103740934B (en) * | 2013-12-23 | 2015-11-04 | 葫芦岛辉宏有色金属有限公司 | The industrial slag containing vanadium, chromium, phosphorus and calcium is utilized to reclaim chemical substance method |
| CN107760863A (en) * | 2017-10-31 | 2018-03-06 | 攀钢集团攀枝花钢铁研究院有限公司 | With the baking mixed production method for carrying chromium of material containing chromium |
| CN114045396B (en) * | 2021-10-13 | 2022-11-25 | 湖北和兴环境材料科技有限公司 | Process for recycling rare metals from solid waste and iron oxide heating roasting furnace |
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