CN104263934A - Air coal blown converter and tin concentrate air coal blown converter smelting method - Google Patents
Air coal blown converter and tin concentrate air coal blown converter smelting method Download PDFInfo
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- CN104263934A CN104263934A CN201410450991.3A CN201410450991A CN104263934A CN 104263934 A CN104263934 A CN 104263934A CN 201410450991 A CN201410450991 A CN 201410450991A CN 104263934 A CN104263934 A CN 104263934A
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- slag
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 239000003245 coal Substances 0.000 title claims abstract description 81
- 238000003723 Smelting Methods 0.000 title claims abstract description 65
- 239000012141 concentrate Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000002893 slag Substances 0.000 claims abstract description 100
- 239000011028 pyrite Substances 0.000 claims abstract description 30
- 229910052683 pyrite Inorganic materials 0.000 claims abstract description 30
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 claims abstract description 29
- 230000008569 process Effects 0.000 claims abstract description 28
- 239000002994 raw material Substances 0.000 claims abstract description 24
- 230000009467 reduction Effects 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 238000002844 melting Methods 0.000 claims description 16
- 230000008018 melting Effects 0.000 claims description 16
- 230000002829 reductive effect Effects 0.000 claims description 16
- 230000004907 flux Effects 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 10
- 239000003500 flue dust Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000004567 concrete Substances 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 6
- 230000003447 ipsilateral effect Effects 0.000 claims description 6
- 239000010453 quartz Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005864 Sulphur Substances 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 3
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 239000000428 dust Substances 0.000 abstract 1
- 238000009853 pyrometallurgy Methods 0.000 abstract 1
- 239000000779 smoke Substances 0.000 abstract 1
- 238000005272 metallurgy Methods 0.000 description 13
- 230000001276 controlling effect Effects 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 206010008190 Cerebrovascular accident Diseases 0.000 description 4
- 208000006011 Stroke Diseases 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000011365 complex material Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- NNIPDXPTJYIMKW-UHFFFAOYSA-N iron tin Chemical compound [Fe].[Sn] NNIPDXPTJYIMKW-UHFFFAOYSA-N 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention relates to an air coal blown converter and a tin concentrate air coal blown converter smelting method and belongs to the technical field of non-ferrous metal pyrometallurgy. The air coal blown converter comprises a converter body, a flue, a slag hole, a tin discharging hole and a raw material inlet and also comprises an air coal blow pipe and a pyrite inlet, wherein the converter body is a cylinder, the bottom of the converter body is conical, the converter body is divided into a concentrate smelting region and a slag fuming region, the raw material inlet and the pyrite inlet are formed in the top of the converter body and respectively correspond to the concentrate smelting region and the slag fuming region. The tin concentrate air coal blown converter smelting method comprises the following steps: firstly adding tin concentrate and a reducing agent, optionally adding a solvent, and smelting in the concentrate smelting region and a reacting region to obtain crude tin and tin-containing slag, discharging the crude tin, then putting pyrite into the slag fuming region for carrying out fuming operation including volatilizing and collecting SnS smoke dust, and discharging low-tin slag. The tin concentrate air coal blown converter smelting method has the advantages of simple technology, short flow, safe and controllable process and good environmental benefit, and is easy to operate.
Description
Technical field
The present invention relates to a kind of wind coal blown converter and Tin concentrate wind coal blown converter smelting process, belong to non-ferrous metal pyrometallurgical smelting technical field.
Background technology
Traditional tin metallurgy technology has blast furnace tin metallurgy, electric furnace tin-smelting and reverberatory furnace tin metallurgy, and they are all develop from original shaft furnace tin metallurgy.Blast furnace tin metallurgy is a kind of tin metallurgy method comparatively early, but gets the raw materials ready and do not properly settle, and only the producer of only a few uses so far.Electric furnace tin-smelting starts from 1934, and electric furnace tin-smelting output accounts for 10% of Gross World Product in the world at present, and tin metallurgy electric furnace is sealing substantially, and in stove, carbon monoxide concentration is higher, and reducing atmosphere is strong, is therefore suitable only for the low iron Tin concentrate of process.Reverberatory furnace tin metallurgy started from for 18 beginnings of the century, was the major processes of tin metallurgy, and it produces tin amount and once accounted for 85% of Gross World Product, and smelting technology has also been done many improvement.Because reverberatory smelting is to the strong adaptability of raw material, fuel, operative technique condition is easy to control, easy and simple to handle, adds the production requirement being comparatively applicable to tin smeltery on a small scale, though its thermo-efficiency is low, current many tin-smelting plants still continue to use reverberatory furnace and produce.Although reverberatory furnace technology is through improvement for many years, can accomplish to work continuously, also all types of retailoring reverberatory furnace is designed, as patent-hardhead retailoring tinsel technique and the retailoring reverberatory furnace of application number 200910227066.3, but its production efficiency is low, thermo-efficiency is low, fuel consumption is large, labour intensity is large.Therefore the retailoring of tin is just occurring by reverberatory smelting to be mainly progressively to transform to intensified smelting technology-Ausmelt furnace melting.Ausmelt furnace technology retailoring Period Process carries out, and is usually divided into melting, weak reduction and 3 stages of strong reduction.Smelt stage, needs 6 ~ 7h, and melting terminates rear slag containing about Sn15%; Weak reduction phase, needs 20min, and slag is down to 5% containing Sn by 15%; Strong reduction phase, needs 90min, and slag is down to less than 1% containing Sn by 5%.Strong restore job can not carry out in Ausmelt furnace stove, and directly send fuming furnace process by the lean slag containing about Sn5% obtained through melting and weak reduction two processes.Ausmelt tin metallurgy belongs to top blast intensified smelting process, greatly can improve the efficiency of tin metallurgy, but it requires high to the operability of smelting, and the life-span of top-blown spray gun is short, need often change, level of automation require high, facility investment is large.Electric furnace is also a kind of conventional thick tin melting equipment, and it utilizes the Graphite Electrodes heated material inserting material to carry out the retailoring of metal, output crude tin alloy, but electric furnace energy consumption is high, also consume a large amount of Graphite Electrodes, processing power is low simultaneously, and siege ability is only 2.5 ~ 4T/m
2d.Yunnan Tin Industry Group Co. Ltd has applied for DC electric furnace-fuming furnace combined tin-smelting method (application number: 201010039159.6), it is characterized in that: the one-tenth according to Tin concentrate is dispensed into reductive agent, enter direct current furnace retailoring and produce metallic tin, and liquid slag is proportionately dispensed into vulcanizing agent, sludging flux, enter fuming furnace sulfiding volatilization tin wherein, reclaim with stannic oxide flue dust form, fuming slag is in a liquid state and enters direct current furnace, allocate reductive agent and flux into carry out melting and produce the pig iron, utilize the residual sulphur contained in slag to continue the residual tin of volatilization simultaneously, building materials raw material can be made after its furnace slag granulating.Meanwhile, also someone has applied for smelting furnace with oxygen-enriched side-blown reducing molten bath and rich tin complex material tin metallurgy method (application number 201110445977.0) thereof, disclose a kind of smelting furnace with oxygen-enriched side-blown reducing molten bath and rich tin complex material tin metallurgy method thereof, described smelting furnace comprises shaft, cupola well, molten bath, furnace lining, water jacket, arrange domatic furnace bottom in described cupola well, in the middle part of shaft, molten bath part arranges magnesite chrome brick furnace lining.Described method comprises mixing and granulation, oxygen enrichment retailoring, slag fuming process, stanniferous flue dust reuse operation.This invention oxygen-enriched side-blowing tin reduction bath smelting furnace adopts oxygen-enriched side-blowing technique, melt in stove is made to keep high temperature fused state and strong bubbling stirring, make liquid, solid, gas phase rapid reaction, tin metal cohesion is grown up to 0.5 ~ 5mm drop, rapid sinking and slag layering, improve stove bed ability to 100T/m
2d.Produce 10000 tons of thick tin, only need the 800kVA2m that installs
2this invention side blowing smelting furnace, and with low price brown coal as fuel, energy-conserving and environment-protective.
Above various methodologies is all on different meltings, reduction, fuming metallurgical equipment, carry out the improvement of local, the combination of designed thick tin smelting process also just between distinct device, between each operation, material needs to enter corresponding metallurgical furnace and processes, and necessarily increases the cost of the aspects such as the energy, environment, place thus.For this shortcoming, the present invention proposes and adopt wind coal blown converter technology three smelting processes to be unified in a metallurgical furnace to work continuously, thus larger reduction energy consumption, alleviate environmental pollution, reduce costs.
Summary of the invention
For above-mentioned prior art Problems existing and deficiency, the invention provides a kind of wind coal blown converter and Tin concentrate wind coal blown converter smelting process.Worked continuously being unified in wind coal blown converter in whole tin slightly refining process, by regulating coal-air ratio to control furnace atmosphere, meet the different demands of concentrate melting, slag fuming operation, the present invention is achieved through the following technical solutions.
A kind of wind coal blown converter, comprise shaft, flue 1, slag notch 2, stannum export 5 and feed(raw material)inlet 7, also comprise wind coal blowpipe 6 and pyrite entrance 8, described shaft is cylinder, tapered bottom shaft, shaft is divided into concentrate smelting zone and slag fuming district, shaft top is provided with feed(raw material)inlet 7 and pyrite entrance 8 corresponding concentrate smelting zone and slag fuming district respectively, taper side is provided with stannum export 5, wind coal blowpipe 6 symmetry is positioned at the bottom of the both sides, front and back of shaft, and shaft side side surface upper part is provided with flue 1, the ipsilateral of flue 1 lower end is provided with slag notch 2.
Described wind coal blowpipe 6, between slag notch 2 and stannum export 5, singlely in level is distributed in body of heater side.
The concentrate smelting zone of described shaft is divided into again retailoring district and drastic reduction district, and retailoring district, drastic reduction district, slag fuming district are horizontal distribution successively in body of heater.
A kind of Tin concentrate wind coal blown converter smelting process, its concrete steps are as follows:
Step 1: first Tin concentrate, reductive agent and selectivity are added flux and put into wind coal blown converter from feed(raw material)inlet 7, and in shaft, form 1100 ~ 1300 DEG C of concentrate smelting zones by the coal-air ratio controlling to be blown in wind coal blowpipe 6 and carry out the slag that melting 0.5 ~ 8h obtains thick tin and stanniferous 1.5 ~ 15wt.%, thick tin is released from stannum export 5;
Step 2: the slag of stanniferous 1.5 ~ 15wt.% that step 1 obtains flows through slag fuming district, the coal-air ratio controlling to be blown in wind coal blowpipe 6 makes slag fuming district temperature be 1100 ~ 1300 DEG C, then add pyrite from pyrite entrance 8 and carry out fuming operation, in slag, tin will cure, comprise SnS flue dust to collect out from flue 1 volatilization, discharge from stannum export 5 after the Theil indices in slag is down to <0.1wt.%.
In described step 1, the stanniferous amount of Tin concentrate is 10 ~ 78wt.%.
In described step 1, reductive agent is hard coal, coke powder or charcoal, and the add-on of reductive agent is 110 ~ 130% of theoretical amount tin in Tin concentrate and various metal oxide amount restored completely.
In described step 1, flux is quartz or Wingdale.Calculate flux add-on and first should determine the kind of melting product, quantity and composition, then in the self-fluxing nature of technology slag, namely do not add slag composition during flux, calculate required quantity of solvent accordingly.If conformed to factory slag composition from slag composition, also flux can not be added.
In described step 2, pyritous add-on equals the percentage composition of sulphur in K × (the stanniferous percentage composition of 0.269 × tin slag amount × slag)/pyrite, and K is excess coefficient, gets 1.613.
The invention has the beneficial effects as follows: worked continuously being unified in wind coal blown converter in whole tin slightly refining process, furnace atmosphere is controlled by regulating coal-air ratio, meet the different demands of concentrate melting, slag fuming operation,, material strong adaptability low to material requirement, technique is simple, and flow process is short, and process safety is controlled, easy to operate, environmental benefit is good.
Accompanying drawing explanation
Fig. 1 is wind coal blown converter three-dimensional structure schematic diagram of the present invention;
Fig. 2 is wind coal blown converter floor map of the present invention;
Fig. 3 is wind coal blown converter wind coal blowpipe detailed schematic of the present invention;
Fig. 4 is Tin concentrate wind coal blown converter smelting technology schema of the present invention.
In figure: 1-flue, 2-slag notch, 3-wind coal blowpipe, 4-stannum export, 5-tin metal layer, 6-slag blanket, 7-feed(raw material)inlet, 8-pyrite entrance, 9-wind coal, 10-wind.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Embodiment 1
As shown in Figures 1 to 3, this wind coal blown converter, comprise shaft, flue 1, slag notch 2, stannum export 5 and feed(raw material)inlet 7, also comprise wind coal blowpipe 6 and pyrite entrance 8, described shaft is cylinder, tapered bottom shaft, shaft is divided into concentrate smelting zone and slag fuming district, shaft top is provided with feed(raw material)inlet 7 and pyrite entrance 8 corresponding concentrate smelting zone and slag fuming district respectively, taper side is provided with stannum export 5, wind coal blowpipe 6 symmetry is positioned at the bottom of the both sides, front and back of shaft, shaft side side surface upper part is provided with flue 1, the ipsilateral of flue 1 lower end is provided with slag notch 2.
Its apoplexy coal blowpipe 6, between slag notch 2 and stannum export 5, singlely in level is distributed in body of heater side; The concentrate smelting zone of shaft is divided into again retailoring district and drastic reduction district, and retailoring district, drastic reduction district, slag fuming district are horizontal distribution successively in body of heater.
As shown in Figure 4, this Tin concentrate wind coal blown converter smelting process, its concrete steps are as follows:
Step 1: first 10t Tin concentrate, 0.6t reductive agent and 0.2t flux are put into wind coal blown converter from feed(raw material)inlet 7, and in shaft, form 1100 DEG C of concentrate smelting zones by the coal-air ratio controlling to be blown in wind coal blowpipe 6 and carry out the slag that melting 8h obtains the thick tin of 0.8t and stanniferous 1.5wt.%, thick tin is released from stannum export 5, wherein the stanniferous amount of Tin concentrate is 10wt.%, reductive agent is hard coal, and flux is quartz;
Step 2: the slag of the stanniferous 1.5wt.% that step 1 obtains flows through slag fuming district, the coal-air ratio controlling to be blown in wind coal blowpipe 6 makes slag fuming district temperature be 1300 DEG C, then add 0.5t pyrite from pyrite entrance 8 and carry out fuming operation, in slag, tin will cure, comprise SnS flue dust to collect out from flue 1 volatilization, discharge from stannum export 5 after the Theil indices in slag is down to <0.1wt.%.
Embodiment 2
As shown in Figures 1 to 3, this wind coal blown converter, comprise shaft, flue 1, slag notch 2, stannum export 5 and feed(raw material)inlet 7, also comprise wind coal blowpipe 6 and pyrite entrance 8, described shaft is cylinder, tapered bottom shaft, shaft is divided into concentrate smelting zone and slag fuming district, shaft top is provided with feed(raw material)inlet 7 and pyrite entrance 8 corresponding concentrate smelting zone and slag fuming district respectively, taper side is provided with stannum export 5, wind coal blowpipe 6 symmetry is positioned at the bottom of the both sides, front and back of shaft, shaft side side surface upper part is provided with flue 1, the ipsilateral of flue 1 lower end is provided with slag notch 2.
Its apoplexy coal blowpipe 6, between slag notch 2 and stannum export 5, singlely in level is distributed in body of heater side; The concentrate smelting zone of shaft is divided into again retailoring district and drastic reduction district, and retailoring district, drastic reduction district, slag fuming district are horizontal distribution successively in body of heater.
As shown in Figure 4, this Tin concentrate wind coal blown converter smelting process, its concrete steps are as follows:
Step 1: first 10t Tin concentrate, 1.8t reductive agent and 0.8t flux are put into wind coal blown converter from feed(raw material)inlet 7, and in shaft, form 1200 DEG C of concentrate smelting zones by the coal-air ratio controlling to be blown in wind coal blowpipe 6 and carry out the slag that melting 2h obtains the thick tin of 4t and stanniferous 7wt.%, thick tin is released from stannum export 5, wherein the stanniferous amount of Tin concentrate is 49wt.%, reductive agent is coke powder, and flux is quartz and the limestone mix of mass ratio 1:1;
Step 2: the slag of the stanniferous 7wt.% that step 1 obtains flows through slag fuming district, the coal-air ratio controlling to be blown in wind coal blowpipe 6 makes slag fuming district temperature be 1200 DEG C, then add 1.6t pyrite from pyrite entrance 8 and carry out fuming operation, in slag, tin will cure, comprise SnS flue dust to collect out from flue 1 volatilization, discharge from stannum export 5 after the Theil indices in slag is down to <0.1wt.%.
Embodiment 3
As shown in Figures 1 to 3, this wind coal blown converter, comprise shaft, flue 1, slag notch 2, stannum export 5 and feed(raw material)inlet 7, also comprise wind coal blowpipe 6 and pyrite entrance 8, described shaft is cylinder, tapered bottom shaft, shaft is divided into concentrate smelting zone and slag fuming district, shaft top is provided with feed(raw material)inlet 7 and pyrite entrance 8 corresponding concentrate smelting zone and slag fuming district respectively, taper side is provided with stannum export 5, wind coal blowpipe 6 symmetry is positioned at the bottom of the both sides, front and back of shaft, shaft side side surface upper part is provided with flue 1, the ipsilateral of flue 1 lower end is provided with slag notch 2.
Its apoplexy coal blowpipe 6, between slag notch 2 and stannum export 5, singlely in level is distributed in body of heater side; The concentrate smelting zone of shaft is divided into again retailoring district and drastic reduction district, and retailoring district, drastic reduction district, slag fuming district are horizontal distribution successively in body of heater.
As shown in Figure 4, this Tin concentrate wind coal blown converter smelting process, its concrete steps are as follows:
Step 1: first 10t Tin concentrate, 4t reductive agent and 2t flux are put into wind coal blown converter from feed(raw material)inlet 7, and in shaft, form 1300 DEG C of concentrate smelting zones by the coal-air ratio controlling to be blown in wind coal blowpipe 6 and carry out the slag that melting 0.5h obtains the thick tin of 6t and stanniferous 15wt.%, thick tin is released from stannum export 5, wherein the stanniferous amount of Tin concentrate is 78wt.%, reductive agent is charcoal, and flux is quartz and the limestone mix of mass ratio 1:1;
Step 2: the slag of the stanniferous 15wt.% that step 1 obtains flows through slag fuming district, the coal-air ratio controlling to be blown in wind coal blowpipe 6 makes slag fuming district temperature be 1100 DEG C, then add 3t pyrite from pyrite entrance 8 and carry out fuming operation, in slag, tin will cure, comprise SnS flue dust to collect out from flue 1 volatilization, discharge from stannum export 5 after the Theil indices in slag is down to <0.1wt.%.
Embodiment 4
As shown in Figures 1 to 3, this wind coal blown converter, comprise shaft, flue 1, slag notch 2, stannum export 5 and feed(raw material)inlet 7, also comprise wind coal blowpipe 6 and pyrite entrance 8, described shaft is cylinder, tapered bottom shaft, shaft is divided into concentrate smelting zone and slag fuming district, shaft top is provided with feed(raw material)inlet 7 and pyrite entrance 8 corresponding concentrate smelting zone and slag fuming district respectively, taper side is provided with stannum export 5, wind coal blowpipe 6 symmetry is positioned at the bottom of the both sides, front and back of shaft, shaft side side surface upper part is provided with flue 1, the ipsilateral of flue 1 lower end is provided with slag notch 2.
Its apoplexy coal blowpipe 6, between slag notch 2 and stannum export 5, singlely in level is distributed in body of heater side; The concentrate smelting zone of shaft is divided into again retailoring district and drastic reduction district, and retailoring district, drastic reduction district, slag fuming district are horizontal distribution successively in body of heater.
As shown in Figure 4, this Tin concentrate wind coal blown converter smelting process, its concrete steps are as follows:
Step 1: first 10t Tin concentrate, 3.4t reductive agent are put into wind coal blown converter from feed(raw material)inlet 7, and in shaft, form 1280 DEG C of concentrate smelting zones by the coal-air ratio controlling to be blown in wind coal blowpipe 6 and carry out the slag that melting 4h obtains the thick tin of 5t and stanniferous 12wt.%, thick tin is released from stannum export 5, wherein the stanniferous amount of Tin concentrate is 63wt.%, and reductive agent is coke powder;
Step 2: the slag of the stanniferous 12wt.% that step 1 obtains flows through slag fuming district, the coal-air ratio controlling to be blown in wind coal blowpipe 6 makes slag fuming district temperature be 1200 DEG C, then add 2t pyrite from pyrite entrance 8 and carry out fuming operation, in slag, tin will cure, comprise SnS flue dust to collect out from flue 1 volatilization, discharge from stannum export 5 after the Theil indices in slag is down to <0.1wt.%.
By reference to the accompanying drawings the specific embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.
Claims (8)
1. a wind coal blown converter, comprise shaft, flue (1), slag notch (2), stannum export (5) and feed(raw material)inlet (7), it is characterized in that: also comprise wind coal blowpipe (6) and pyrite entrance (8), described shaft is cylinder, tapered bottom shaft, shaft is divided into concentrate smelting zone and slag fuming district, shaft top is provided with feed(raw material)inlet (7) and pyrite entrance (8) corresponding concentrate smelting zone and slag fuming district respectively, taper side is provided with stannum export (5), wind coal blowpipe (6) symmetry is positioned at the bottom of the both sides, front and back of shaft, shaft side side surface upper part is provided with flue (1), the ipsilateral of flue (1) lower end is provided with slag notch (2).
2. wind coal blown converter according to claim 1, is characterized in that: described wind coal blowpipe (6) is positioned between slag notch (2) and stannum export (5), singlely in level is distributed in body of heater side.
3. wind coal blown converter according to claim 1, is characterized in that: the concentrate smelting zone of described shaft is divided into again retailoring district and drastic reduction district, and retailoring district, drastic reduction district, slag fuming district are horizontal distribution successively in body of heater.
4. a Tin concentrate wind coal blown converter smelting process, is characterized in that concrete steps are as follows:
Step 1: first Tin concentrate, reductive agent and selectivity are added flux and put into wind coal blown converter from feed(raw material)inlet (7), and in shaft, form 1100 ~ 1300 DEG C of concentrate smelting zones by the coal-air ratio controlling to be blown in wind coal blowpipe (6) and carry out the slag that melting 0.5 ~ 8h obtains thick tin and stanniferous 1.5 ~ 15wt.%, thick tin is released from stannum export (5);
Step 2: the slag of stanniferous 1.5 ~ 15wt.% that step (1) obtains flows through slag fuming district, the coal-air ratio controlling to be blown in wind coal blowpipe (6) makes slag fuming district temperature be 1100 ~ 1300 DEG C, then add pyrite from pyrite entrance (8) and carry out fuming operation, in slag, tin will cure, comprise SnS flue dust to collect out from flue (1) volatilization, the Theil indices in slag is discharged from stannum export (5) after being down to <0.1wt.%.
5. Tin concentrate wind coal blown converter smelting process according to claim 3, is characterized in that: in described step 1, the stanniferous amount of Tin concentrate is 10 ~ 78wt.%.
6. according to the arbitrary described Tin concentrate wind coal blown converter smelting process of claim 3 or 4, it is characterized in that: in described step 1, reductive agent is hard coal, coke powder or charcoal, the add-on of reductive agent is 110 ~ 130% of theoretical amount tin in Tin concentrate and various metal oxide amount restored completely.
7. according to the arbitrary described Tin concentrate wind coal blown converter smelting process of claim 3 or 4, it is characterized in that: in described step 1, flux is quartz or Wingdale.
8. according to the arbitrary described Tin concentrate wind coal blown converter smelting process of claim 3 or 4, it is characterized in that: in described step 2, pyritous add-on equals the percentage composition of sulphur in K × (the stanniferous percentage composition of 0.269 × tin slag amount × slag)/pyrite, K is excess coefficient, gets 1.613.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410450991.3A CN104263934B (en) | 2014-09-05 | 2014-09-05 | A kind of wind coal blown converter and Tin concentrate wind coal blown converter smelting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN110170242A (en) * | 2019-04-10 | 2019-08-27 | 水口山有色金属有限责任公司 | Electronic waste, the exhaust treatment system of a kind of electronic waste smelting device and its composition |
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| CN1861818A (en) * | 2006-06-12 | 2006-11-15 | 彭明求 | Side-blown submerged smelting bath smelting process |
| CN2854470Y (en) * | 2005-12-19 | 2007-01-03 | 彭明求 | Side-blown submerged bath smelting furnace |
| CN101906540A (en) * | 2010-07-21 | 2010-12-08 | 杨龙安 | Solder splash side blowing molten pool smelting furnace cold metal direct making fuming volatilization method |
| CN103114212A (en) * | 2013-02-01 | 2013-05-22 | 中国瑞林工程技术有限公司 | Device and method for smelting antimony |
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| CN2854470Y (en) * | 2005-12-19 | 2007-01-03 | 彭明求 | Side-blown submerged bath smelting furnace |
| CN1861818A (en) * | 2006-06-12 | 2006-11-15 | 彭明求 | Side-blown submerged smelting bath smelting process |
| CN101906540A (en) * | 2010-07-21 | 2010-12-08 | 杨龙安 | Solder splash side blowing molten pool smelting furnace cold metal direct making fuming volatilization method |
| CN103114212A (en) * | 2013-02-01 | 2013-05-22 | 中国瑞林工程技术有限公司 | Device and method for smelting antimony |
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| CN110170242A (en) * | 2019-04-10 | 2019-08-27 | 水口山有色金属有限责任公司 | Electronic waste, the exhaust treatment system of a kind of electronic waste smelting device and its composition |
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