CN1448523A - Process of producing zinc oxide by smelting in rotary kiln - Google Patents
Process of producing zinc oxide by smelting in rotary kiln Download PDFInfo
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- CN1448523A CN1448523A CN 02108607 CN02108607A CN1448523A CN 1448523 A CN1448523 A CN 1448523A CN 02108607 CN02108607 CN 02108607 CN 02108607 A CN02108607 A CN 02108607A CN 1448523 A CN1448523 A CN 1448523A
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- zinc
- rotary kiln
- coking coal
- zinc oxide
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Abstract
The present invention relates to metal smelting technology. The zinc oxide smelting process in rotary kiln includes crushing zinc charging and coking coal into grains smaller than 40 mesh, mixing zinc charging and coking coal in the ratio of 1 to 0.30-0.35 to obtain mixed material, pelletizing the mixture into coarse grains of 8-15 mm diameter and final smelting the coarse grain material in rotary kiln. When used in producing zinc oxide with zinc oxide ore containing 15-25 % zinc or zinc containing waste industrial slag, the present invention has the advantages of saving great amount of coke or coking coal, high product quality, high yield and less nodule amount.
Description
Technical field
The present invention relates to Metal smelting Technology field, especially a kind of in rotary kiln with zinc oxide ore or contain the zinc industrial slag and mix with coal and smelt the processing method of producing zinc oxide.
Background technology
Existing adopt rotary kiln with zinc oxide ore contain the zinc industrial slag or one of this two to add back powder that part obtains in settling pocket in smelting be that 15%～25% furnace charge (hereinafter to be referred as the zinc furnace charge) is the processing method of raw material production zinc oxide as a kind of zinc that contains, mostly be that the zinc furnace charge is mixed with sieving the part of the body cavity below the umbilicus, housing the bladder, kidneys and bowels or coal (hereinafter to be referred as the coking coal) ratio in 1: 0.5～0.6, drop in the rotary kiln then and smelt.In order to make furnace charge have certain diversity, the granularity general requirement of coking coal is between 5～15 millimeters.The result of this processing method is once being that the big coking coal unburn of a large amount of particles is used as slag fully and discharges and slattern; The 2nd, the little coking coal of particle influences quality product mixing with product in by induced draft fan suction cooling system and cloth bag chamber along with stirring of rotary kiln.In recent years, in order to save coking coal, part producer takes to arrange in pairs or groups part through screening the zinc white slag instead of part coke that wherein contains imperfect combustion carbon on the basis of above-mentioned technology.But it is still little that this method is saved the effect of coking coal, but also can influence quality product.For a long time, people think that the technology consumption of coal of this employing rotary kiln production zinc oxide is greatly inevitable.The technological operation that the applicant is engaged in smelting in rotary kiln production zinc oxide has more than two decades history, earnestly gropes for many years, wishes to find a kind of method of the consumption reduction that goes out to economize on coal, but all fails to achieve one's goal.Yet the applicant is once solving ring formation of rotary kiln, promptly during the accretion problem, has obtained a kind of processing method that smelting in rotary kiln is produced the energy consumption of zinc oxide that reduces accidentally.
Summary of the invention
The subject matter that the present invention will solve provides a kind of quality product that neither influences, and can save the processing method of the smelting in rotary kiln production zinc oxide of coking coal consumption again.
In order to address the above problem, the processing method that this smelting in rotary kiln is produced zinc oxide is:
A, zinc furnace charge and coking coal are crushed into less than 40 order particulate material;
B, the zinc furnace charge mixed to mix thoroughly in 1: 0.30～0.35 ratio with coking coal obtain compound;
C, described compound is made effective diameter is 8-15 mm granules compound;
D, drop in the rotary kiln with described particle mixture and to smelt.
The blending ratio system of above-mentioned zinc furnace charge and coking coal determines according to zinc content in the zinc furnace charge and the carbon content in the coking coal, the ratio of zinc furnace charge and coking coal is meant that working as the zinc furnace charge contains zinc 15%～25%, the fuel value of coking coal is at the ratio of 5500～6500 kilojoule per kilogram, and the blending ratio that generally can adopt zinc furnace charge and coking coal is 1: 0.30.
Owing to adopted such scheme the present invention compared with prior art to have following beneficial effect:
1, energy-conservation.Through being that 1.6 meters, length are to do simultaneous test on 27 meters the rotary kiln at diameter, processing method of the present invention is saved coking coal than prior art and is reached 40%.
2, good product quality.Because coking coal is with zinc furnace charge mixing granulation, significantly reduced because of coking coal particle too small by the amount of induced draft fan suction cloth bag chamber, thereby improved quality product.
3, boost productivity.Because coking coal with zinc furnace charge mixing granulation, has increased the ventilation property of furnace charge, thereby help the efficient volatilization of zinc, the productivity that oxidation improves zinc oxide.Through being that 1.6 meters, length are to do simultaneous test on 27 meters the rotary kiln at diameter, adopt processing method of the present invention can increase the treatment capacity of zinc furnace charge more than 15%.
4, rotary kiln dross amount is little.Processing method of the present invention compared with prior art, the cleaning cycle of rotary kiln dross extended to more than 15 days by 4 days.
Embodiment
The invention will be further described below in conjunction with the accompanying drawing example:
Embodiment:
The rotary kiln specification is that diameter is that 1.6 meters, length are 27 meters, and the zinc furnace charge is a zinc ore and the mixture of smelting the sedimentation powder that middle setting chamber obtains, and it contains zinc 15%, and iron content 13% contains the zinc oxide ore of silicon-dioxide 20%.Coking coal is that fuel value is the fine coal of 5500～6500 kilojoule per kilogram.
A, 40 mesh sieves are pulverized, crossed to zinc furnace charge and coking coal;
B, the zinc furnace charge after will sieving and coking coal mix, mix thoroughly and become mixture charge in 1: 0.3 ratio;
C, mixture charge dropped into add water on the nodulizer to make water ratio be that 18%-22%, diameter are 8-15 millimeter circular granular compound;
D, described particle mixture is dropped into rotary kiln smelt.
The relevant technologies index of above-mentioned processing method gained is as follows with the result that the record of production mean value before the employing processing method of the present invention is compared:
| Ton pit coal consumption (kilogram) | Cloth bag powder zinc oxide content | Show cold powder zinc oxide content | |||||||
| The highest | Minimum | On average | The highest | Minimum | On average | The highest | Minimum | On average | |
| Former processing method | 700 | 450 | 500 | ?74％ | 65％ | 70％ | 48％ | 40％ | 45％ |
| Technology of the present invention | 300 | ?80％ | 75％ | 77％ | 70％ | 59％ | 65％ | ||
Claims (2)
1, a kind of smelting in rotary kiln is produced the processing method of zinc oxide, it is characterized in that:
A, zinc furnace charge and coking coal are crushed into less than 40 order particulate material;
B, the zinc furnace charge mixed to mix thoroughly in 1: 0.30～0.35 ratio with coking coal obtain compound;
C, described compound is made effective diameter is 8-15 mm granules compound;
D, drop in the rotary kiln with described particle mixture and to smelt.
2, smelting in rotary kiln according to claim 1 is produced the processing method of zinc oxide, and it is characterized in that: the blending ratio of described zinc furnace charge and coking coal is 1: 0.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02108607 CN1448523A (en) | 2002-03-29 | 2002-03-29 | Process of producing zinc oxide by smelting in rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02108607 CN1448523A (en) | 2002-03-29 | 2002-03-29 | Process of producing zinc oxide by smelting in rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1448523A true CN1448523A (en) | 2003-10-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02108607 Pending CN1448523A (en) | 2002-03-29 | 2002-03-29 | Process of producing zinc oxide by smelting in rotary kiln |
Country Status (1)
| Country | Link |
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| CN (1) | CN1448523A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560124A (en) * | 2012-02-24 | 2012-07-11 | 唐锡中 | Treatment method for harmless reclamation of solid waste of heavy metal |
| CN103255296A (en) * | 2012-02-16 | 2013-08-21 | 姜洪金 | Energy-saving and environment-friendly new technology for production of zinc oxide in rotary kiln and comprehensive recovery of iron copper gold silver indium |
| CN109180153A (en) * | 2018-08-09 | 2019-01-11 | 云南宏佑投资有限公司 | A method of with oxidation rotary kiln tailings potting grain |
-
2002
- 2002-03-29 CN CN 02108607 patent/CN1448523A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103255296A (en) * | 2012-02-16 | 2013-08-21 | 姜洪金 | Energy-saving and environment-friendly new technology for production of zinc oxide in rotary kiln and comprehensive recovery of iron copper gold silver indium |
| CN103255296B (en) * | 2012-02-16 | 2015-02-25 | 姜洪金 | Energy-saving and environment-friendly new technology for production of zinc oxide in rotary kiln and comprehensive recovery of iron copper gold silver indium |
| CN102560124A (en) * | 2012-02-24 | 2012-07-11 | 唐锡中 | Treatment method for harmless reclamation of solid waste of heavy metal |
| CN102560124B (en) * | 2012-02-24 | 2014-04-02 | 唐锡中 | Treatment method for harmless reclamation of solid waste of heavy metal |
| CN109180153A (en) * | 2018-08-09 | 2019-01-11 | 云南宏佑投资有限公司 | A method of with oxidation rotary kiln tailings potting grain |
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