CN1502711A - Technology and apparatus for producing greater than 99% grade zinc oxide by rotary kiln - Google Patents
Technology and apparatus for producing greater than 99% grade zinc oxide by rotary kiln Download PDFInfo
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- CN1502711A CN1502711A CNA021490287A CN02149028A CN1502711A CN 1502711 A CN1502711 A CN 1502711A CN A021490287 A CNA021490287 A CN A021490287A CN 02149028 A CN02149028 A CN 02149028A CN 1502711 A CN1502711 A CN 1502711A
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- rotary kiln
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Abstract
The present invention relates to a new process for producing zinc oxide whose grade is above 99% by using rotary kiln. Said invention utilizes the regulation of material specification and proportion, and improves the conventional rotary kiln so as to produce zinc oxide whose grade is above 99%. Said invented equipment mainly is formed from rotary kiln, feeding pipe, settling chamber, oxidation chamber, oxidation hole, cleaning doors, dust-collecting chamber, cooling pipe, flue pipe, cloth bag chamber, fan, chimney and others.
Description
The present invention relates to field of metallurgy, particularly, the present invention relates to a kind of with rotary kiln production 99% above grade zinc oxide novel process and device.
At present, the method for direct method production zinc oxide generally adopts Vickers oven process (also claiming U.S.'s method) and rotary kiln working system.Though the Vickers stove both can have been produced 95% following zinc oxide, also can produce 99% above grade zinc oxide, Vickers stove list stove day output is low.Daily output is about 8 tons, and zinc recovery≤90%.Though and the single kiln day output of rotary kiln is big, output is up to more than 20 tons, zinc recovery is also than Vickers oven process height, reach more than 95%, but adopt conventional method production, material containing zinc just simply mixes the back charging with anthracite fine coal, because machinery flies upward, volume of smoke enters in the product, have a strong impact on main grade, whiteness and the hydrochloric acid insoluble substance of product, so use rotary kiln can only produce 95% following zinc oxide in the prior art or be used for valuable metal enrichment and comprehensive recovery such as indium germanium, and can't produce 99% above grade zinc oxide.
Purpose of the present invention just provides a kind of with rotary kiln production 99% above grade zinc oxide novel process;
Another object of the present invention has provided a kind of device of producing 99% above grade zinc oxide with rotary kiln.
Description of drawings
Accompanying drawing I is a kind of device with rotary kiln production 99% above grade zinc oxide, wherein, the 1st, rotary kiln, the 2nd, tremie pipe, the 3rd, settling pocket, the 4th, oxidizing chamber, the 5th, oxidation hole, the 6th, cleaning door, the 7th, poly-dirt chamber; The 8th, cleaning door, the 9th, cigarette lane, the 10th, cooling tube, the 11st, cooling hopper, the 12nd, cloth bag chamber, the 13rd, blower fan, the 14th, chimney.
Further specify method of the present invention below in conjunction with accompanying drawing I. At rotary kiln 1 volatilization process In, processed material containing zinc and reducing agent (coke powder or anthracite fine coal) are pressed Zn: C=1: (1.0～1.5) after weight ratio mixes, in the tubulose rotary kiln 1 that slightly tilts of packing into, when the kiln body rotates Furnace charge stirs, so metal zinc oxide thing ZnO then contacts and is reduced with reduction carbon in the material, Kiln temperature is up to 1273-1523k, and the evaporation of metal that is reduced out enters gas phase, in gas phase In be oxidized to zinc oxide, but in the process that furnace charge stirs, the flue dust in the furnace charge is also sneaked into gas Phase forms furnace gas, when furnace gas by expansion chamber 3, most flue dust is settled down, and is remaining The zinc oxide of flue dust and generation enters table cooling system 10 and cloth bag chamber 12 under blower fan 13 air inducing, Be captured after the condensation, become zinc oxide product. But, in the method for prior art, because Flue dust is too many, and the grade of the zinc oxide that obtains is not high, does not reach more than 95%. And the present invention be The raw material composition is produced 99% above grade zinc oxide raw material with the Vickers stove, and identical (that is: material containing zinc is mixed Matter content Pb+Cd+S+Cu+As+Cl etc.＜1%, Zn 〉=60%, smokeless beans, fine coal or coke powder Require fixed carbon 〉=60%, fugitive constituent＜15%, ash content＜30%, sulphur＜3.0%) or lower feelings Under the condition, by improvement of production process and operation, produce 99% qualified above grade with rotary kiln Zinc oxide. Specifically be improved to: 1. control rotary kiln 1 rotating speed tabular value 300-1000, control is smokeless Small-particle coal or coke powder granule φ are 1mm-50mm, and entering stove moisture content is 5-15%, thereby effectively Ground has reduced machinery and has flown upward; 2. for reducing system jams, per 8 hours is to make in a powder delivery cycle Zinc oxide product is more even with weight distribution; 3. design jumbo expansion chamber 3, make cigarette in the furnace gas The abundant sedimentation of dirt between rotary kiln 1 and cooling tube 10, has increased oxidizing chamber 4, poly-dirt chamber 7 and cigarette lane 9, in oxidizing process, replenished oxygen, make the zinc fume oxidation more abundant, increase Poly-dirt chamber 7 (inside can be provided with or not have partition wall) can make flue dust and lead oxide and cadmium oxide Deng the further sedimentation of impurity, and under negative pressure or little negative pressure condition, operate, make zinc oxide product with Weight distribution is more reasonable, namely obtains the product of more quality better as far as possible, thereby can guarantee product Main grade, whiteness and specific area bigger, also reduced simultaneously hydrochloric acid insoluble substance; 4. former Material and anthracite fine coal, lime or clay are pressed CaO3～10% or clay 10～20%, carbon containing 10～30%, contain zinc and be 8～43% the proportioning that requires and mix, moisture content is 3～15%, makes by granulation Granule, diameter phi is 1～60mm; 5. or material containing zinc particle diameter≤10mm and particle diameter 1mm-The smokeless beans of 50mm or coke powder mix, and wherein require Zn 〉=8%, carbon containing 〉=10%, moisture content 3-15%. Thereby by the invention with first-class several aspects rotary kiln can be produced and meet national standard 99% above grade zinc oxide.
Therefore, the invention provides a kind of method of producing 99% above grade zinc oxide with rotary kiln, the method comprises the steps:
A. particle diameter φ＜10mm contained zinc high temperature calcining (Zn 〉=60% wherein, Pb+Cd+S+Cu+As+Cl＜1%) and the anthracite fine coal of particle diameter φ＜15mm or coke powder (wherein require fixed carbon 〉=60%, fugitive constituent＜15%, ash＜30%, sulphur＜3.0%) mixes with lime or clay, guaranteeing moisture content granulation under the 5-15% condition, to prepare the granule that diameter is about 1mm-60mm, contain zinc 8-43% in granule, carbon containing 15-30%, contain CaO3-10% or argillaceous 5-20%, airing is to a moisture content 3-15% then;
B. be smokeless beans of 1mm-50mm or burnt grain with granule among the step a and particle diameter, adding the smokeless beans of 100-500kg or burnt grain ratio in every 1000kg granule (is 1 with a smokeless beans or a burnt part by weight promptly granule: 0.1-0.5) in the rotary kiln of mixed material feeding adding accompanying drawing I device of the present invention;
C. control the kiln temperature and be 1273-1523K, rotary kiln rotating speed tabular value is 300-1000;
D. according to routine operation, regulate cloth bag fan pressure and air quantity, produce and obtain high-grade zinc oxide.
Method of the present invention also can be undertaken by following manner:
A '. particle diameter φ＜10mm contained zinc high temperature calcining (Zn 〉=60% wherein, Pb+Cd+S+Cu+As+Cl＜1%) and particle diameter φ be that anthracite fine coal or the coke powder of 1-50mm (wherein requires fixed carbon 〉=60%, fugitive constituent＜15%, ash＜30%, sulphur＜3.0%) mixes, contain zinc 〉=8% to prepare, carbon containing＞10%, moisture content 3-15% goes into the kiln material;
B '. the material among the step a ' is added in the rotary kiln of accompanying drawing I device of the present invention;
C '. control kiln temperature is 1273-1523K, and rotary kiln rotating speed tabular value is 300-1000;
D '. according to routine operation, regulate cloth bag fan pressure and air quantity, produce and obtain high-grade zinc oxide.
In addition, the present invention also provides a kind of device with rotary kiln production 99% above grade zinc oxide, and this installs mainly by rotary kiln 1, tremie pipe 2, settling pocket 3, oxidizing chamber 4, oxidation hole 5, cleaning door 6, poly-dirt chamber 7, cleaning door 8, cigarette lane 9, cooling tube 10, cooling hopper 11, cloth bag chamber 12, blower fan 13 and chimney 14 are formed, and it is characterized in that using jumbo settling pocket 3, between rotary kiln 1 and cooling tube 10, increased oxidizing chamber 4, poly-dirt chamber 7 and cigarette lane 9 are provided with partition wall in the wherein poly-dirt chamber 7, and partition wall can have the 1-3 layer, making furnace gas be " S " type like this flows, thereby make flue dust and the further sedimentation of impurity such as plumbous oxide and Cadmium oxide, do not establish partition wall in the perhaps poly-dirt chamber 7, because poly-7 spaces, dirt chamber are big, make flue gas flow rate slow down, thereby also make flue dust and the further sedimentation of impurity such as plumbous oxide and Cadmium oxide.
Compare with method and apparatus of the prior art, technology of the present invention and device have following advantage:
1. compare with the Vickers stove, the present invention uses improved rotary kiln production equipment, and its single kiln day output is big, the zinc recovery height, and the product specific surface area is big, thereby reduces production costs, and can adjust output at any time;
2. compare with Vickers oven process production 99% above grade zinc oxide, workman's charging labour intensity and operating environment temperature all reduce greatly, and easily realize automatic production;
3. compare with the rotary kiln production method of routine, the present invention is by regulating material specification and the ratio that drops into, and the rotary kiln to routine improves, used jumbo settling pocket 3, between rotary kiln 1 and cooling tube 10, increased oxidizing chamber 4, poly-dirt chamber 7 and cigarette lane 9, in oxidising process, replenished oxygen, make the zinc fume oxidation more abundant, and under negative pressure or little negative pressure condition, operate, make zinc oxide product more reasonable, promptly obtain the product of more quality better as far as possible, thereby can guarantee the main grade of product with weight distribution, whiteness and specific surface area are bigger, simultaneously also reduced hydrochloric acid insoluble substance, the rotary kiln production equipment that can only produce 95% grade zinc oxide originally has been improved to the device that can produce 99% above grade zinc oxide.
Further specify method of the present invention with embodiment below.It should be understood that these embodiment are only used for further specifying embodiment of the present invention, rather than be used to limit the present invention.All belong to protection scope of the present invention in the various improvement of in fact the present invention being carried out of the present invention.Except as otherwise noted, the percentage ratio among the present invention all is weight percentage.
Example 1: produce 99% above grade zinc oxide
Particle diameter φ＜6mm contained zinc high temperature calcining (Zn 〉=60% wherein; Pb+Cd+S+Cu+As+Cl＜1%) and the anthracite fine coal of particle diameter φ＜10mm (wherein require fixed carbon 〉=60%; fugitive constituent＜15%; ash＜30%; sulphur＜3.0%) be 15-30% with lime (will starch behind the bubble) by carbon containing; containing zinc and be 18-40% and containing CaO is that the theoretical value of 3-6% is calculated mixing after the proportioning; and control moisture content granulation under the 5-12% condition; make the granule that φ is 1mm-60mm; dry to moisture content be 5-12%; is 1 by granule with smokeless small-particle or coke powder small-particle part by weight: 0.15-0.5; enter rotary kiln 1 by tremie pipe 2, the rotary kiln tabular value is that 300-1000 changes, and kiln temperature is 1273-1573k; according to practical situation to blast volume; the blast and the air quantity of cloth bag blower fan 13 are adjusted, and can produce 99% above grade zinc oxide.
Example 2: produce 99% above grade zinc oxide
Particle diameter φ＜5mm contained zinc high temperature calcining (Zn 〉=60% wherein, Pb+Cd+S+Cu+As+Cl＜1%) and particle diameter φ be that the anthracite fine coal of 1mm-20mm (wherein requires fixed carbon 〉=60%, fugitive constituent＜15%, ash＜30%, sulphur＜3.0%) according to Zn: C=1: (1.0-1.5) weight ratio mixes, and to require kiln material moisture content be 6-15%, carbon containing＞15%, contain Zn＞15%, by tremie pipe 2 material is added rotary kiln 1, rotary kiln rotating speed tabular value is that 300-800 changes, when temperature is 1273-1573k in the rotary kiln, according to practical situation to blast volume, the blast and the air quantity of cloth bag blower fan 13 are adjusted, and can produce 99% above grade zinc oxide.
Claims (10)
1. a method of producing 99% above grade zinc oxide with rotary kiln comprises the steps:
A. the anthracite fine coal that contains zinc high temperature calcining and particle diameter φ＜15mm of particle diameter φ＜10mm or coke powder and lime or clay are mixed, wherein, contain Zn 〉=60% in the high temperature calcining, Pb, Cd, S, Cu, As and Cl foreign matter content sum＜1%, require fixed carbon 〉=60% in anthracite fine coal or the coke powder, fugitive constituent＜15%, ash＜30% and sulphur＜3.0%; Guaranteeing moisture content granulation under the 5-15% condition, to prepare the granule that diameter is about 1mm-60mm, containing zinc 8-43% in granule, carbon containing 15-30% contains CaO 3-10% or argillaceous 5-20%, and airing is to a moisture content 3-15% then;
B. be smokeless beans of 1mm-50mm or burnt grain with granule among the step a and particle diameter, be 1 by granule with smokeless beans or burnt grain part by weight: the mixed of 0.1-0.5 feeds intake and adds in the rotary kiln of accompanying drawing I device;
C. control the kiln temperature and be 1273-1523K, rotary kiln rotating speed tabular value is 300-1000;
D. according to routine operation, regulate cloth bag fan pressure and air quantity, produce and obtain high-grade zinc oxide.
2. according to the process of claim 1 wherein, contain zinc 18-40% in the granule among the step a, carbon containing 15-30% contains CaO3-6%, and airing is to a moisture content 5-12% then.
3. according to the method for claim 1 or 2, wherein granule is 1 with a smokeless beans or a burnt grain part by weight among the step b: 0.15-0.5.
4. according to the process of claim 1 wherein that the powder delivery cycle of zinc oxide is 8 hours.
5. a method of producing 99% above grade zinc oxide with rotary kiln comprises the steps:
A '. with contain zinc high temperature calcining and the particle diameter φ of particle diameter φ＜10mm is that anthracite fine coal or the coke powder of 1-50mm mixes, wherein, contain Zn 〉=60% in the high temperature calcining, Pb, Cd, S, Cu, As and Cl foreign matter content sum＜1% require fixed carbon 〉=60%, fugitive constituent＜15% in anthracite fine coal or the coke powder, ash＜30% and sulphur＜3.0%, contain zinc 〉=8% to prepare, carbon containing＞10%, moisture content 3-15% goes into the kiln material;
B '. the material among the step a ' is added in the rotary kiln of accompanying drawing I device;
C '. control kiln temperature is 1273-1523K, and rotary kiln rotating speed tabular value is 300-1000;
D '. according to routine operation, regulate cloth bag fan pressure and air quantity, produce and obtain high-grade zinc oxide.
6. according to the method for claim 5, wherein the weight ratio of zinc and carbon is 1 in the material of the middle adding of step a ' rotary kiln: 1.0-1.5.
7. according to the method for claim 5, wherein the powder delivery cycle of zinc oxide is 8 hours.
8. device of producing 99% above grade zinc oxide with rotary kiln, this device is mainly by rotary kiln (1), tremie pipe (2), settling pocket (3), oxidizing chamber (4), oxidation hole (5), cleaning door (6), poly-dirt chamber (7), cleaning door (8), cigarette lane (9), cooling tube (10), cooling hopper (11), cloth bag chamber (12), blower fan (13) and chimney (14) are formed, it is characterized in that using jumbo settling pocket (3), between rotary kiln (1) and cooling tube (10), increased oxidizing chamber (4), poly-dirt chamber (7) and cigarette lane (9).
9. device according to Claim 8 is provided with partition wall in the wherein poly-dirt chamber (7).
10. according to the device of claim 9, be provided with 1-3 floor partition wall in the wherein poly-dirt chamber (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021490287A CN1502711A (en) | 2002-11-20 | 2002-11-20 | Technology and apparatus for producing greater than 99% grade zinc oxide by rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021490287A CN1502711A (en) | 2002-11-20 | 2002-11-20 | Technology and apparatus for producing greater than 99% grade zinc oxide by rotary kiln |
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| CN1502711A true CN1502711A (en) | 2004-06-09 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040242A (en) * | 2010-12-17 | 2011-05-04 | 上海新奥能源科技有限公司 | Zinc oxide kiln |
| CN102092775A (en) * | 2010-12-17 | 2011-06-15 | 上海新奥能源科技有限公司 | Energy-saving zinc oxide kin |
| CN102374773A (en) * | 2010-08-08 | 2012-03-14 | 中国铝业股份有限公司 | Modification method for carbon rotary kiln settling chamber |
| CN103014372A (en) * | 2012-12-17 | 2013-04-03 | 葫芦岛炼锌厂 | Zinc smelting device for gas rotary kiln |
| CN104120279A (en) * | 2014-08-13 | 2014-10-29 | 湖南建勋环保资源科技发展有限公司 | Device for producing zinc oxide in rotary furnace |
| CN102102153B (en) * | 2009-12-21 | 2014-11-12 | 李维成 | Method for producing zinc oxide and iron by treating zinc ore (slag) in reduction rotary kiln |
| CN104697346A (en) * | 2015-03-11 | 2015-06-10 | 张家港市双龙氧化锌厂 | High-temperature powder cooling device |
| CN106152145A (en) * | 2016-06-30 | 2016-11-23 | 湖南博环保科技有限公司 | A kind of method utilizing rotary kiln to dispose the fume afterheat containing zinc hazardous waste |
| CN108220621A (en) * | 2018-01-09 | 2018-06-29 | 石家庄市龙力化工有限公司 | A kind of technique of direct method production high-purity zinc oxide |
-
2002
- 2002-11-20 CN CNA021490287A patent/CN1502711A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102153B (en) * | 2009-12-21 | 2014-11-12 | 李维成 | Method for producing zinc oxide and iron by treating zinc ore (slag) in reduction rotary kiln |
| CN102374773B (en) * | 2010-08-08 | 2013-10-30 | 中国铝业股份有限公司 | Modification method for carbon rotary kiln settling chamber |
| CN102374773A (en) * | 2010-08-08 | 2012-03-14 | 中国铝业股份有限公司 | Modification method for carbon rotary kiln settling chamber |
| CN102040242B (en) * | 2010-12-17 | 2012-07-04 | 上海新奥能源科技有限公司 | Zinc oxide kiln |
| CN102092775B (en) * | 2010-12-17 | 2012-10-10 | 上海新奥能源科技有限公司 | Energy-saving zinc oxide kiln |
| CN102040242A (en) * | 2010-12-17 | 2011-05-04 | 上海新奥能源科技有限公司 | Zinc oxide kiln |
| CN102092775A (en) * | 2010-12-17 | 2011-06-15 | 上海新奥能源科技有限公司 | Energy-saving zinc oxide kin |
| CN103014372A (en) * | 2012-12-17 | 2013-04-03 | 葫芦岛炼锌厂 | Zinc smelting device for gas rotary kiln |
| CN104120279A (en) * | 2014-08-13 | 2014-10-29 | 湖南建勋环保资源科技发展有限公司 | Device for producing zinc oxide in rotary furnace |
| CN104697346A (en) * | 2015-03-11 | 2015-06-10 | 张家港市双龙氧化锌厂 | High-temperature powder cooling device |
| CN106152145A (en) * | 2016-06-30 | 2016-11-23 | 湖南博环保科技有限公司 | A kind of method utilizing rotary kiln to dispose the fume afterheat containing zinc hazardous waste |
| CN106152145B (en) * | 2016-06-30 | 2018-07-03 | 湖南博一环保科技有限公司 | A kind of method of fume afterheat using rotary kiln disposition hazardous waste containing zinc |
| CN108220621A (en) * | 2018-01-09 | 2018-06-29 | 石家庄市龙力化工有限公司 | A kind of technique of direct method production high-purity zinc oxide |
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