CN1095690A - Acid plant's sulfate slag reduction Magnitizing method and equipment - Google Patents
Acid plant's sulfate slag reduction Magnitizing method and equipment Download PDFInfo
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- CN1095690A CN1095690A CN 93111259 CN93111259A CN1095690A CN 1095690 A CN1095690 A CN 1095690A CN 93111259 CN93111259 CN 93111259 CN 93111259 A CN93111259 A CN 93111259A CN 1095690 A CN1095690 A CN 1095690A
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- kiln
- reduction
- sulfate slag
- magnetization
- reduction magnetization
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Abstract
The present invention relates to acid plant sulfate slag reduction Magnitizing method and specific equipment, with this method and apparatus can be rapidly, easily Fe in the sulfate slag
2O
3Be reduced to ferromagnetic Fe
3O
4, FeO and small amount of Fe, more easily composition such as the smart powder of separating ferrum.Present method and facility investment are few, cost is low, and be effective, is a kind of method and apparatus that promotional value is arranged.
Description
The present invention carries out abundant recoverying and utilizing method and equipment for waste residue in the gas washing in SA production.
Sulfate slag is an industrial production vitriolic waste residue, contains iron, copper, cobalt, sulphur, gold and silver etc. and is worth very high element, and main component is Fe
2O
3, FeO, CuS, CoS, SiO
2, CaO, MgO, Al
2O
3Deng.Iron content is many 40%～56% in the sulfate slag, and copper, cobalt contents are also in optional scope, and about 7,000,000 tons of sulfate slags are produced in the whole nation per year, make full use of, and benefit will be very remarkable.
The application of sulfate slag has several different methods both at home and abroad at present:
1, utilize sulfate slag to carry out the smart powder of magnetic separation iron, but the iron in the sulfate slag mostly is Fe
2O
3Form belongs to weak magnetic, and the magnetic separation effect is relatively poor.
2, utilize method for floating, select the smart powder of iron, but the smart powder iron content of selected iron is low, sulfur-bearing is high, the smart opaque amount of iron is defective, and copper, cobalt can not reclaim, and causes the wasting of resources.
3, advanced method is also arranged at present, 100% sulfate slag chlorination pelletizing equipment as Nanjing Steel ﹠ Iron Plant's huge fund is introduced can make full use of the higher sulfate slag of iron-holder, and recyclable rare metal, but investment is big, and complex process is difficult for promoting.
4, in the batching of producing cement, also can add a part, the real waste that belongs to resource.
In sum, the sulfate slag recovery and treatment method of seeking a kind of simple, feasible, less investment, high efficiency is very necessary.
The present invention promptly is the problem that exists at prior art and the sulfate slag reduction Magnitizing method of inventing a kind of simple, easily row, and the existence form of iron is by original Fe in the sulfate slag after the reduction magnetization
2O
3Become ferromagnetic Fe
3O
4, FeO and small amounts of iron metal, just use present floating magnetic connection choosing method easily and select the smart powder of iron, copper fine-powdery, the smart powder of cobalt.
Principle of work of the present invention is such: acting on sulfate slag with carbon monoxide more than 570 ℃, the oxide compound of iron in ore is from maxivalence Fe
2O
3Following reaction takes place in beginning.
Method of the present invention is: pump into diesel oil in the special-purpose reduction magnetization of the sulfate slag reduction kiln and light with oil pump, when temperature reaches more than 300 ℃, make the rotation of reduction magnetization kiln, with even heating, when temperature reaches 800 ℃, open special-purpose selection by winnowing hammer-crusher and pump into coal dust, make it to light, continue heating, reduction magnetization kiln when reduction magnetization kiln temperature reaches 850 ℃～950 ℃, is continuously sent into the compound that sulfate slag adds coal dust with proportioning belt in reduction magnetization kiln, coal dust content is 2%～7% in the compound, and the coal dust in the compound produces hydrogen (H under high temperature action
2), carbon monoxide (CO) reduces magnetization to sulfate slag, and about 15～25 minutes of magnetization time, the sulfate slag that the reduction magnetization finishes flows out from reduction magnetization kiln, transports after the cooling.
1 is coal dust bucket, the 2nd among the figure, sulfuric acid slag bucket, the 3rd, dedusting hopper, the 4th, feeding machine, the 5th, screw feeder, the 6th, reduction magnetization kiln, the 7th, discharge port, the 8th, air compressor machine, the 9th, diesel oil pump, the 10th, the selection by winnowing hammer-crusher, the 11st, burner blower, the 12nd, coal burns to be chewed, the 13rd, diesel oil burns to be chewed, the 14th, combustion chamber, the 15th, settling pocket 15,16th, tornado dust collector, the 17th, blower fan, the 18th, chimney; The 19th, thermopair, the 20th, conveyor, the 21st, cooling drum, the 22nd, discharge nozzle.
One conveyor 4 is arranged below coal dust bucket 1, sulfuric acid slag bucket 2, dedusting hopper 3, be used to carry compound, below conveyor 4 ends, be provided with screw feeder 5, be used to carry compound.Reduction magnetization kiln 6 is one the cylinder of small inclination to be arranged, and its higher-end connects settling pocket 15, and settling pocket 15 tops are used for the dedusting smoke evacuation by pipe connection tornado dust collector 16, blower fan 17, chimney 18.The discharge nozzle 22 of screw feeder 5 passes settling pocket 15, and oblique cutting is gone in the reduction magnetization kiln 6; Reduction magnetization kiln 6 than low side be provided with coal burn chew 12 and diesel oil burn and chew 13, they are arranged in the combustion chamber; The bottom is provided with discharge port 7 outside the combustion chamber of reduction magnetization kiln 6, discharge port 7 bottoms are stretched in the cooling drum 21, cooling drum 21 is one the garden tube at inclination angle to be arranged, its low side outlet below is provided with conveyor 20, diesel oil burner 13 outsides connect air compressor machine 8 by pipeline, diesel oil pump 9 and burner blower 11, coal burning are chewed the 12 outside selection by winnowing hammer-crushers 10 that connect and are used to be pressed into coal dust.On reduction magnetization kiln 6, also have a pair of thermopair 19 that puts in the kiln, be used for thermometric.
Working process of the present invention is such: after preparation work is ready, start diesel oil pump 9 simultaneously, air compressor machine 8, burner blower 11, light the diesel oil burning and chew 13, heating flame chamber 14 and reduction magnetization kiln 6 are when temperature reaches more than 300 ℃, start reduction magnetization kiln 6, make it even heating.When combustion chamber 14 temperature reach more than 800 ℃, start selection by winnowing hammer-crusher 10, coal injection, coal dust is at high temperature promptly lighted, and open blower fan 17 and carry out air inducing this moment.When the temperature of reduction magnetization kiln 6 reaches 900 ℃, open conveyor 4, by coal dust bucket 1, sulfuric acid slag bucket 2, the raw material of dedusting hopper 3 is sent into screw feeder 5, and compound enters reduction along discharge nozzle 22 and magnetizes kiln 6 and reduce magnetization.Coal dust at high temperature generates CO, CO
2, H
2, C
mH
nDeng composition, CO, H
2Fe in beginning and the sulfate slag
2O
3Begin reaction, Fe
2O
3Promptly change Fe gradually into
3O
4, FeO and small amount of Fe are after about 25 minutes, the sulfate slag that has reacted is discharged to enter from discharge port 7 and is begun the cooling drum 21 that rotates, and cooled sulfate slag is transported by conveyor 20, carries out ore dressing, by the floating magnetic connection choosing smart powder that can sorting taps a blast furnace, the smart powder of copper fine-powdery and cobalt.
Recycle sulfate slag with method of the present invention and specific equipment reduction magnetization, it is simple to have production technique, less investment, and the characteristics of efficient height can make the Fe in the sulfate slag
2O
3Transform ferromagnetic Fe in large quantities rapidly,
3O
4, FeO and Fe, can fully reclaim the smart powder of iron, copper fine-powdery, the smart powder of cobalt by the choosing of floating magnetic connection again, for reducing environmental pollution, make full use of resource, have certain meaning, be a kind of sulfate slag reduction Magnitizing method and equipment with promotional value.
When the present invention adopts following examples, invention thought will easier be implemented.
In the method for reducing, when reduction magnetization kiln temperature reaches 900 ℃, continuously send into the compound that sulfate slag adds coal dust in reduction magnetization kiln with proportioning belt, coal dust content is 4% in the compound, and the reduction magnetizing time is 20 minutes.
The required equipment of magnetization reduction is that summary of the invention is described.
Claims (2)
1, a kind of sulfate slag reduction magnetization recoverying and utilizing method, it is characterized in that pumping into diesel oil in the special-purpose reduction magnetization of the sulfate slag kiln and lighting with oil pump, when temperature reaches more than 300 ℃, make the rotation of reduction magnetization kiln, when temperature reaches 800 ℃, open special-purpose selection by winnowing hammer-crusher and pump into coal dust, when reduction magnetization kiln temperature reaches 850 ℃～900 ℃, continuously in reduction magnetization kiln, send into the compound that sulfate slag adds coal dust with proportioning belt, coal dust content is 2%～7% in the compound, the reduction magnetizing time is about 15～25 minutes, transports after the sulfate slag cooling of having reacted.
2, the required specific equipment of a kind of sulfate slag reduction Magnitizing method, the structure that it is characterized in that this equipment is such: a conveyor 4 is arranged below coal dust bucket 1, sulfuric acid slag bucket 2, dedusting hopper 3, below conveyor 4 ends, be provided with screw feeder 5, reduction magnetization kiln 6 is one the garden tube of small inclination to be arranged, its higher-end connects settling pocket 15, and settling pocket 15 tops connect tornado dust collector 16, blower fan 17, chimney 18 successively by pipeline; The discharge nozzle 22 of screw feeder 5 passes settling pocket 15, and oblique cutting is gone in the reduction magnetization kiln 6; Reduction magnetization kiln 6 than low side be provided with coal burn chew 12 and diesel oil burn and chew 13, they are arranged in the combustion chamber; The bottom is provided with discharge port 7 outside the combustion chamber of reduction magnetization kiln 6, discharge port 7 bottoms are stretched in the cooling drum 21, cooling drum 21 is one the garden tube at inclination angle to be arranged, its low side outlet below is provided with conveyor 20, diesel oil burner 13 outsides connect air compressor machine 8 by pipeline, diesel oil pump 9 and burner blower 11, coal burn chews the 12 outside selection by winnowing hammer-crushers 10 that connect; On reduction magnetization kiln 6, also has a pair of thermopair 19 that puts in the kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111259 CN1095690A (en) | 1993-05-28 | 1993-05-28 | Acid plant's sulfate slag reduction Magnitizing method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111259 CN1095690A (en) | 1993-05-28 | 1993-05-28 | Acid plant's sulfate slag reduction Magnitizing method and equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1095690A true CN1095690A (en) | 1994-11-30 |
Family
ID=4989058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93111259 Pending CN1095690A (en) | 1993-05-28 | 1993-05-28 | Acid plant's sulfate slag reduction Magnitizing method and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1095690A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102849469A (en) * | 2012-10-10 | 2013-01-02 | 新汶矿业集团有限责任公司翟镇煤矿 | Uniform mixing treatment device for coal ingredients |
-
1993
- 1993-05-28 CN CN 93111259 patent/CN1095690A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102849469A (en) * | 2012-10-10 | 2013-01-02 | 新汶矿业集团有限责任公司翟镇煤矿 | Uniform mixing treatment device for coal ingredients |
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| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |