CN101112975A - New method for producing strontium sulfide - Google Patents
New method for producing strontium sulfide Download PDFInfo
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- CN101112975A CN101112975A CNA2007100777689A CN200710077768A CN101112975A CN 101112975 A CN101112975 A CN 101112975A CN A2007100777689 A CNA2007100777689 A CN A2007100777689A CN 200710077768 A CN200710077768 A CN 200710077768A CN 101112975 A CN101112975 A CN 101112975A
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- coal
- srso
- strontium sulfide
- lazurite
- kiln
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Abstract
The invention relates to a method for producing strontium sulfide. The method is that SrSO4 from the broken celestite and coal celestite and carbon in the coal are mixed at a Molar ratio of 1 : 2.0 to 2.5, and the materials into ball-shaped objects and massive objects is produced by adding water when the powder is grinded to between 80 to 150 meshes, and then put the ball-shaped objects and the massive objects is put into a sagger, and the sagger provided with the two objects is put into massive kilns such as a tunnel kiln, a wheel kiln, an inverted kiln to conduct reduction roasting. The method, compared with the traditional producing methods, has the advantages of high efficiency of the celestite, and low consumption of coal, stable manufacturing, and easy control.
Description
Technical field: the present invention relates to the another production method of strontium sulfide, relate in the chemical industry with lazurite (SrSO
4) and coal (C) be the producing and manufacturing technique of raw material production strontium sulfide (SrS).
Background technology: all " (Shanghai science tech publishing house publishes in February, 1992 the chemical technique handbook production method of existing production strontium sulfide with document, the Jiang Tiqian chief editor) report is identical, the production method of document P148～149 disclosed strontium sulfides is a prior art, this production method be with celestite ore and coal (common coal or coke) after suitable fragmentation, content according to content of strontium in the ore and coal adopts suitable pit coal proportioning, usually at 1: 0.35～0.6 (mass ratio), be crushed to 20 orders again, send in the converter then, 1100～1200 ℃ of following roastings, roasting time is 0.5～1h, and the sintered material that comes out from converter is the strontium sulfide product.
Lazurite is reduced to SrS in converter carries out in following several modes:
SrSO
4+4C→SrS+4CO (1)
SrSO
4+2C→SrS+2CO
2 (2)
SrSO
4+4CO→SrS+4CO
2?(3)
Wherein lazurite mainly is to be reduced to strontium sulfide by (3) formula in converter.Document " prior art of disclosed production strontium sulfide exists the some shortcomings problem in the chemical technique handbook, and these problems are:
1, to be converted into the transformation efficiency of strontium sulfide low for Strontium Sulphate, generally has only about 70%.Because transformation efficiency is low, the content of strontium sulfide generally has only about 40～50% in the thick product.This just wastes resource greatly, when processing strontium salt, produces a large amount of waste residues, contaminate environment simultaneously.
2, coal consumption height.The coal consumption height is that the reason of two aspects causes, and aspect is that the feed coal consumption of reduction usefulness is big, is that the bunker coal consumption that needs of burning is big on the other hand.Produce 1 ton of thick strontium sulfide and need standard coal (thermal value 7000kcal/kg) 0.8 ton, common coal is about 1 ton.
Above deficiency is that " production method of chemical technique handbook prior art rationally causes inadequately owing to document.At Strontium Sulphate (SrSO
4) be reduced in the process of strontium sulfide (SrS), SrSO is arranged
4Solid-solid reaction and SrSO with C
4Solid-solid/liquid/gas reactions dual mode with CO.In converter, owing to constantly rotate, lazurite is difficult to closely contact with coal, does not realize SrSO at all
4With the solid-solid reaction of C, only reliable SrSO
4Realize SrSO with solid-solid/liquid/gas reactions of CO
4Be converted into SrS.But the gas in the kiln is not to have only CO, also has a large amount of N
2, O
2, CO
2Wait other gas, these gases will inevitably rise isolates and shielding effect, makes CO and SrSO
4Reaction incomplete, also might make the SrS of generation be oxidized to SrSO again
4, perhaps with CO
2Reaction generates SrCO
3Take place Deng side reaction.More than be exactly to cause SrSO
4Being converted into the low reason of transformation efficiency of SrS, is exactly that converter-heat insulation effect is poor on the other hand, and thermal radiation is big, and airshed is big, and thermosteresis is big, also is the reason that causes energy consumption high.
The objective of the invention is the SrSO that exists in the existing strontium sulfide production method in order to overcome
4The transformation efficiency that is converted into SrS is low, and serious waste lazurite resource, and the high shortcoming of energy consumption have proposed a kind of new process for producing that can save the production SrS of money consumption reduction.This method can make SrSO
4The transformation efficiency that is converted into SrS improves 30%, economizes on resources 30%, simultaneously save energy 30%.
Summary of the invention: after the present invention is achieved in that raw material lazurite and coal be crushed to certain particle respectively, again with SrSO in the lazurite
4With carbon content in coal C is 1: 2.0～2.5 to prepare burden in molar ratio, batching is after mixing, grinding fineness is to the 80-150 order again, add water and make globe or little block, packing into, (saggar size and shape can be according to tunnel furnace size and kiln car sizes and suitably preparation for saggar, be generally cylindric) in, add a cover, saggar is deposited on the kiln car.Saggar overlapping stacking up and down, saggar to keep the certain intervals distance all around, as flue and quirk, the kiln car that to load onto saggar then pushes in tunnel furnace or annular kiln or down-draft kiln or other block sintering kiln, be heated to 700～1300 ℃ with coal, coal gas, Sweet natural gas or other type of heating with thermal zone in the kiln, and under this temperature, kept 1.5-3.0 hour.After heat, be contained in pellet or C and the SrSO of material in the piece in the saggar
4Redox reaction has taken place:
SrSO
4+2C→SrS+2CO
2
Kiln car is released in kiln, after cooling, the grog ball of saggar or piece poured out just obtain thick strontium sulfide product.
The present invention has following feature and beneficial effect:
1, " technology in the chemical technique handbook is different with document for the equipment of sintering processing of the present invention and calcining use and technology.Prior art in the document is that finish mix grain of lazurite raw material and coal or material powder are calcined in converter; this law is that lazurite and coal are made raw material bead or fritter after by grinding; put into saggar, again saggar is put into block sintering kiln (comprising tunnel furnace, annular kiln, down-draft kiln or reflecting kiln) calcining.
2, the technology of the present invention is at SrSO
4Be reduced to the main chemical reactions mechanism of SrS " main chemical reactions mechanism is different in the chemical technique handbook with document by coal.The present invention makes SrSO owing to be tightly to make ball or piece by lazurite and coal dust mill back by adding hydraulic pressure
4Form tight contact the, SrSO with C
4Mainly realize SrSO with C by solid-solid reaction
4Be converted into SrS.Main chemical reactions is:
SrSO
4+2C→SrS+2CO
2
Prior art mainly is to pass through SrSO in the document
4Realize SrSO with the gas-solid reaction of CO
4Be converted into SrS.Main chemical reactions is:
SrSO
4+4CO→SrS+4CO
2
3, the technology of the present invention is lacked than document prior art consumption of coal when producing strontium sulfide.1 mole of SrSO among the present invention
4Be converted into 1 mole of SrS and only need consume 2 moles of C, and document " 1 mole of SrSO of prior art in the chemical technique handbook
4Be converted into 1 mole of SrS and need consume 4 moles of C, therefore the present invention's reduction is a half with coal than the prior art reduction with coal, sintering process of the present invention is to adopt the flat-top tunnel furnace to carry out sintering simultaneously, tunnel furnace is because good heat insulating, waste heat recovery is good, saves much on bunker coal with rotary kiln sintered than document prior art.Generally speaking, the present invention lacks 30% at least than the prior art consumption of coal.
4, the present invention is to the utilization ratio height of lazurite resource.Sintering process of the present invention is to adopt SrSO
4Closely contact with C, make SrSO
4Abundant by the C reduction, so SrSO
4Be converted into the transformation efficiency height of SrS, can reach more than 95%.And the sintering process of document prior art be powder shape raw material rotary kiln sintered, mainly be SrSO
4Solid-solid/liquid/gas reactions with CO.SrSO
4Also be subjected to N in the kiln by CO reductive probability
2, O
2, CO
2Wait the screening effect of other gas, make 8rSO
4The transformation efficiency that is converted into SrS reduces, and its transformation efficiency generally has only 60～70%.Therefore the present invention than prior art to SrSO
4Utilization ratio improve 30%.
5, the present invention is because SrSO
4Be converted into the transformation efficiency height of SrS, SrS content height in the then thick SrS product.The series product of strontium salt all are that thick SrS product behind the soluble in water and filter cleaner, is added the series product that other relevant chemical feedstocks obtains being correlated with.The present invention is owing to SrS content height in the thick SrS product, and the water-soluble back quantity of slag is just few.SrS content is low in the thick SrS product that the prior art of document is produced, and the water-soluble back quantity of slag is just big, and the discharging of slag is big for environment pollution, so the present invention can be greatly improved to environmental influence to the production of strontium salt series.
Embodiment:
Embodiment 1:
Implement raw material:
Lazurite: SrSO
4Content is 75.0%, and lazurite feedstock capture point is the auspicious mining industry of a Qinghai Province Delingha autonomous prefecture strong wind mountain gold stock company.
Coal: carbon containing (C) amount is 65%, and ash is 20%, and the coal collection point is the Kaiyang County, Guizhou Province.
Implement the place: Guizhou Province's Zhenyuan County gold shellfish chemical industry company limited
Implementation method:
Earlier lazurite and coal are crushed to the following granularity of φ 3mm, with SrSO in the lazurite
4With 1: 2.1 in molar ratio batching (preparing burden) of carbon content in coal C with electronic scales, mixing grinding to 120 order, screen over-size are less than 5%, after the fecula material adds less water, make pellet, pellet is packed in the saggar (saggar size is φ 20cm, high 30cm), close the lid, then saggar is put on the tunnel kiln car, kiln car pushed in the tunnel furnace calcine, calcining temperature is thermal zone to be 950 ℃, and calcination time is 2.5h.
Result of implementation:
The thick strontium sulfide product that obtains, testing SrS content by analysis is 63.0%, lazurite SrSO
4Transformation efficiency be 99.9%.
Embodiment 2:
Implement raw material:
Lazurite: SrSO
4Content is 75.0%, and lazurite feedstock capture point is the auspicious mining industry of a Qinghai Province Delingha autonomous prefecture strong wind mountain gold stock company.
Coal: carbon containing (C) amount is 60%, and ash is 22%, and the coal collection point is Kaili City Lu Shan colliery, Guizhou Province.
Implement the place: Guizhou Province's Zhenyuan County gold shellfish chemical industry company limited
Implementation method:
Earlier lazurite and coal are crushed to the following granularity of φ 3mm, with SrSO in the lazurite
4With 1: 2.2 in molar ratio batching (preparing burden) of C in the coal with electronic scales, mixing grinding to 100 order, screen over-size are less than 5%, after the fecula material adds less water, make pellet, pellet is packed in the saggar (saggar size is φ 20cm, high 30cm), close the lid, then saggar is put on the tunnel kiln car, kiln car pushed in the tunnel furnace calcine, calcining temperature is thermal zone to be 1100 ℃, and calcination time is 1.5h.
Result of implementation:
The thick strontium sulfide product that obtains, testing SrS content by analysis is 61.6%, lazurite SrSO
4Transformation efficiency be 99.8%.
Embodiment 3:
Implement raw material: lazurite: SrSO
4Content is 75.0%, and lazurite feedstock capture point is the auspicious mining industry of a Qinghai Province Delingha autonomous prefecture strong wind mountain gold stock company.
Coal: carbon containing (C) amount is 65%, and ash is 20%, and the coal collection point is the Kaiyang County, Guizhou Province.
Implement the place: Guizhou Province's Zhenyuan County gold shellfish chemical industry company limited
Implementation method:
Earlier lazurite and coal are crushed to the following granularity of φ 3mm, with SrSO in the lazurite
4With 1: 2.0 in molar ratio batching (preparing burden) of C in the coal with electronic scales, mixing grinding to 150 order, screen over-size are less than 5%, after the fecula material adds less water, make pellet, pellet is packed in the saggar (saggar size is φ 20cm, high 30cm), close the lid, then saggar is put on the tunnel kiln car, kiln car pushed in the tunnel furnace calcine, calcining temperature is thermal zone to be 700 ℃, and calcination time is 3.0 hours.
Result of implementation:
The thick strontium sulfide product that obtains, testing SrS content by analysis is 51.5%, lazurite SrSO
4Transformation efficiency be 86%.
Embodiment 4:
Implement raw material: lazurite: SrSO
4Content is 75.0%, and lazurite feedstock capture point is the auspicious mining industry of a Qinghai Province Delingha autonomous prefecture strong wind mountain gold stock company.
Coal: carbon containing (C) amount is 65%, and ash is 20%, and the coal collection point is the Kaiyang County, Guizhou Province.
Implement the place: Guizhou Province's Zhenyuan County gold shellfish chemical industry company limited
Implementation method:
Earlier lazurite and coal are crushed to the following granularity of φ 3mm, with SrSO in the lazurite
4With 1: 2.5 in molar ratio batching (preparing burden) of C in the coal with electronic scales, mixing grinding to 80 order, screen over-size are less than 5%, after the fecula material adds less water, make pellet, pellet is packed in the saggar (saggar size is φ 20cm, high 30cm), close the lid, then saggar is put on the tunnel kiln car, kiln car pushed in the tunnel furnace calcine, calcining temperature is thermal zone to be 1300 ℃, and calcination time is 1 hour.
Result of implementation:
The thick strontium sulfide product that obtains, testing SrS content by analysis is 60.5%, lazurite SrSO
4Transformation efficiency be 98.0%.
From the foregoing description as can be known, SrSO in the lazurite
4Should be with carbon content in coal C mole proportioning a little more than theoretical amount 1: 2.0, if the coal amount is too high, though can reach effect same, but the waste of coal is bigger, SrSO in the lazurite
4With carbon content in coal be 1: 2.1～2.2 for best in molar ratio.Under the condition of best proportioning, maturing temperature is high more, and roasting time is just short, and maturing temperature is low more, and roasting time is just long, even but maturing temperature to be lower than 700 ℃ of roasting time long again, effect is also bad, during 95 ℃ of reducing roasting temperature, roasting time 2.5 hours; During 1000 ℃ of maturing temperatures, 1.5 hours effects of roasting time are best.For solid-solid reaction, grinding particle size is thin more, helps reaction more and carries out, and the general granularity of the present invention gets final product at 80～150 orders, best testing size 120 orders.
Claims (5)
1. a novel method of producing strontium sulfide is characterized in that lazurite after the fragmentation and coal are pressed SrSO in the lazurite
4Mol ratio 1.0 with carbon content in coal: the 2.0-2.5 proportioning raw materials is prepared burden, behind the mixing, pass through grinding again to the 80-150 order, and in adding the saggar of packing into after water is made spherical or little block, add a cover, the saggar that pellet or material piece will be housed is then put into tunnel furnace or annular kiln or down-draft kiln or other block sintering kiln, carries out reducing roasting 1.5-3.0 hour under 700 ℃-1300 ℃ sintering temperature, and obtains high-load strontium sulfide product.
2. a kind of novel method of producing strontium sulfide according to claim 1 is characterized in that proportioning raw materials is meant lazurite SrSO
4Prepare burden with carbon content in coal C 1.0: 2.1 in molar ratio～2.2.
3. a kind of novel method of producing strontium sulfide according to claim 1 is characterized in that sintering kiln is tunnel furnace the best.
4. according to claim 1 or 2 or 3 described a kind of novel methods of producing strontium sulfide, it is characterized in that the reducing roasting temperature is 950 ℃, roasting time 2.5 hours or maturing temperature are 1000 ℃ of roasting time 1.5 hours.
5. a kind of novel method of producing strontium sulfide according to claim 4 is characterized in that raw material pulverizing granularity 120 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100777689A CN101112975A (en) | 2007-05-23 | 2007-05-23 | New method for producing strontium sulfide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100777689A CN101112975A (en) | 2007-05-23 | 2007-05-23 | New method for producing strontium sulfide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101112975A true CN101112975A (en) | 2008-01-30 |
Family
ID=39021533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100777689A Pending CN101112975A (en) | 2007-05-23 | 2007-05-23 | New method for producing strontium sulfide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101112975A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106586975A (en) * | 2016-11-28 | 2017-04-26 | 江苏大学 | Process for reducing celestine in rotary hearth furnace to produce strontium sulfide |
| CN115432728A (en) * | 2022-10-11 | 2022-12-06 | 南京工程学院 | Method for producing high-purity strontium carbonate by using hydrometallurgy technology |
-
2007
- 2007-05-23 CN CNA2007100777689A patent/CN101112975A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106586975A (en) * | 2016-11-28 | 2017-04-26 | 江苏大学 | Process for reducing celestine in rotary hearth furnace to produce strontium sulfide |
| CN115432728A (en) * | 2022-10-11 | 2022-12-06 | 南京工程学院 | Method for producing high-purity strontium carbonate by using hydrometallurgy technology |
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Open date: 20080130 |