CN103555966A - Method for producing zinc hypoxide powder in rotary kiln by taking blast furnace smoke as raw material - Google Patents
Method for producing zinc hypoxide powder in rotary kiln by taking blast furnace smoke as raw material Download PDFInfo
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- CN103555966A CN103555966A CN201310490196.2A CN201310490196A CN103555966A CN 103555966 A CN103555966 A CN 103555966A CN 201310490196 A CN201310490196 A CN 201310490196A CN 103555966 A CN103555966 A CN 103555966A
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Abstract
The invention provides a method for producing zinc hypoxide powder in a rotary kiln by taking blast furnace smoke as a raw material. The method comprises a step of performing high-temperature fuming treatment on a furnace inlet raw material to produce zinc hypoxide powder in the rotary kiln, and is characterized in that the furnace inlet raw material is prepared by the following steps: uniformly mixing the following raw materials in percentage by mass: 50-60 percent of blast furnace smoke dust, 20-40 percent of settlement powder, 8-15 percent of returned dust and 5-8 percent of lime, and controlling the moisture content of the mixture to be 16-22 mass percent; preparing pellets according to a conventional method, thus obtaining the pelletized furnace inlet raw material. Therefore, the blast furnace smoke becomes a renewable resource, a valuable zinc element is recovered, the problem that environmental pollution is caused because the blast furnace smoke is discharged outwards and stored is properly solved, the air permeability of materials in the rotary kiln is obviously improved due to the prepared pellets, the comprehensive energy consumption is reduced, ring forming in the kiln is avoided, the service life of the kiln is effectively prolonged, the production efficiency is improved, and the production cost is reduced.
Description
Technical field
The present invention relates to a kind of production method of oxide powder and zinc, especially a kind of to take iron-smelting blast furnace flue dust-gas plaster be raw material, and rotary kiln is produced the method for oxide powder and zinc, belongs to blast furnace dust comprehensive utilization technique field.
Background technology
In blast furnace production process, conventionally supervene a large amount of blast furnace dust-gas plasters.Owing to containing the zinc of recoverable in blast furnace dust, therefore, how effectively to fully utilize blast furnace dust, reclaim valuable element, be the problem that manufacturing enterprise makes great efforts tackling key problem for a long time.Wherein a technology is, after blast furnace dust is mixed with coke powder, to send in rotary kiln, after high temperature fuming art breading, obtains this product of Second-rate zinc oxide powder, makes the zinc in blast furnace dust obtain efficient recovery and utilization.But there is following deficiency in existing this technology: one, because the grade of blast furnace dust is thinner, in roasting process in rotary kiln, because of material ventilation property extreme difference, cause coke powder fuel in roasting process, because of incomplete combustion, and be difficult to provide the reduction reaction envrionment temperature of 1100 ℃, be difficult to bring into play the effect of reductive agent simultaneously, can not effectively improve thermo-efficiency and reaction efficiency, in addition for improving material grain clinkering rolling situation in kiln, need there is more breeze check melt polymerization and absorb meltable FeS, cause energy consumption high.Two, because material component is complicated, especially contain SiO
2and have plumbous existence, and can form low melting point eutectic, after fusing, will hinder the rolling of material; Simultaneously because of the iron that contains volume and there is sulphur existence, can form iron sulphide FeS, and FeS is meltable, make material grain clinkering and increase rolling difficulty, add that grain size of raw material is thinner, be easy to be attached on the material grain of semi-melting state, cause between preheating zone and reaction zone, reaction zone and cooling zone (being temperature range junction), form ring junction material strip, the normal production run of serious obstruction, and uncontrollable, therefore, knot kiln is serious, and shorten work-ing life kiln phase.
Summary of the invention
The object of the present invention is to provide a kind of good permeability, furnace charge is not tied kiln, and thermo-efficiency utilizes high, and iron-smelting blast furnace flue dust-gas plaster of take that reaction efficiency is good is raw material, produces the method for oxide powder and zinc with rotary kiln.
The present invention completes by following technical proposal: a kind ofly take the method that blast furnace dust produces oxide powder and zinc as raw material rotary kiln, the step that comprises rotary kiln high temperature fuming process feed stock for blast furnace production Second-rate zinc oxide powder, is characterized in that feed stock for blast furnace makes through the following step:
A, by following quality % for raw material:
Blast furnace dust 50～60%
Sedimentation powder 20～40%
Back powder 8～15%
Lime 5～8%;
B, the standby raw material of steps A institute is fully mixed, controlling mixture moisture content is 16～22% mass ratioes;
C, the compound of step B is made to pelletizing routinely, must enter stove pellet feed.
Described sedimentation powder is the dust reclaiming in the fly-ash separator from conventional stove production line.
Described back powder is the dust reclaiming in the surface cooler from conventional stove production line.
The add-on of described lime is with SiO in compound
2: CaO=2: 1 weight ratio is advisable, to improve the temperature of fusion of material, avoid ramming material in kiln.
The control of described mixture moisture content, is advisable with 16～22% mass ratioes, and moisture content is large lower than 16% airborne dust, causes loss of material, and moisture content very easily sticks on ball die wall in pelletizing process higher than 22% material, and affects normal pelletizing.
Select to add CaO, can be effectively in gas mud middle acid substance SiO
2, avoid ramming material in kiln, can slow down the chemical erosion of raw material to kiln lining simultaneously.
The present invention not only makes blast furnace dust---and gas plaster becomes renewable resource, solve zinc element in iron manufacturing process, disadvantageous effect blast furnace being caused because of circulation enrichment, also properly settled blast furnace dust simultaneously---gas plaster because of outer row, store up the problem that causes environmental pollution, the pellet feed of making has significantly improved the material permeability in rotary kiln, comprehensive energy consumption is obviously reduced, kiln condition is stablized controlled, ring formation no longer in kiln, effectively extended work-ing life kiln phase, improved production efficiency, reduced production costs.
The economic benefit realizing is as follows:
1, pure ball material per ton is saved 0.185 ton of breeze, reduces 138.75 yuan/ton of production costs, falls 184.8 ten thousand yuan/year of costs;
2, enter after kiln roasting, save 34.6 ten thousand yuan/year of consuming cost of breeze (3.46 ten thousand yuan/month * October);
3, increase material treatment capacity 18%, improve product recovery rate 4%, increase income 10.47 ten thousand yuan/year (1.87 tons/month * 5600 yuan/ton * October).
More than add up to and fall 219.4 ten thousand yuan/year of costs, increase income 10.47 ten thousand yuan/year, economic benefit and social benefit are remarkable.
Embodiment
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
Blast furnace dust used---gas mud chemical composition is as follows:
A, by following quality % for raw material:
Lime is added to SiO in compound
2: CaO=2: 1
Blast furnace dust 50%
Sedimentation powder 40%
Back powder surplus;
B, the standby raw material of steps A institute is fully mixed, controlling mixture moisture content is 16% mass ratio;
C, the compound of step B is made to pelletizing routinely, must enter stove pellet feed;
D, the stove pellet feed that enters of step C is sent in rotary kiln, under following reduction volatilization condition: temperature is 1150 ℃, rotating speed be 1 turn/2 minutes, roasting 2 hours, the volatilizations such as valuable metal Zn, Pd, Cd, In, Bi enter in gas phase, by reclaiming surface cooler, bagroom, obtain Second-rate zinc oxide powder, the kiln slag that simultaneously obtains the rotary kiln by-product that can again utilize, the chemical composition of gained Second-rate zinc oxide powder sees the following form:
Embodiment 2
Blast furnace dust used---gas mud chemical composition is as follows:
A, by following quality % for raw material:
Lime is added to SiO in compound
2: CaO=2: 1
Blast furnace dust 60%
Sedimentation powder 20%
Back powder surplus;
B, the standby raw material of steps A institute is fully mixed, controlling mixture moisture content is 22% mass ratio;
C, the compound of step B is made to pelletizing routinely, must enter stove pellet feed;
D, the stove pellet feed that enters of step C is sent in rotary kiln, under following reduction volatilization condition: temperature is 1250 ℃, rotating speed be 1 turn/2 minutes, roasting 2 hours, the volatilizations such as valuable metal Zn, Pd, Cd, In, Bi enter in gas phase, by reclaiming surface cooler, bagroom, obtain Second-rate zinc oxide powder, the kiln slag that simultaneously obtains the rotary kiln by-product that can again utilize, the chemical composition of gained Second-rate zinc oxide powder sees the following form:
Claims (4)
1. the blast furnace dust of take is a method for raw material rotary kiln production oxide powder and zinc, comprises the step of rotary kiln high temperature fuming process feed stock for blast furnace production Second-rate zinc oxide powder, it is characterized in that feed stock for blast furnace makes through the following step:
A, by following quality % for raw material:
Blast furnace dust 50～60%
Sedimentation powder 20～40%
Back powder 8～15%
Lime 5～8%;
B, the standby raw material of steps A institute is fully mixed, controlling mixture moisture content is 16～22% mass ratioes;
C, the compound of step B is made to pelletizing routinely, must enter stove pellet feed.
2. as claimed in claim 1ly take blast furnace dust and be that raw material rotary kiln produces the method for oxide powder and zinc, it is characterized in that described sedimentation powder is the dust reclaiming in the fly-ash separator from conventional stove production line.
3. as claimed in claim 1ly take blast furnace dust and be that raw material rotary kiln produces the method for oxide powder and zinc, it is characterized in that described back powder is the dust reclaiming in the surface cooler from conventional stove production line.
4. as claimed in claim 1ly take blast furnace dust and be that raw material rotary kiln produces the method for oxide powder and zinc, it is characterized in that described lime is added to SiO in compound
2: CaO=2: 1 mass ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310490196.2A CN103555966B (en) | 2013-10-18 | 2013-10-18 | Method for producing zinc hypoxide powder in rotary kiln by taking blast furnace smoke as raw material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310490196.2A CN103555966B (en) | 2013-10-18 | 2013-10-18 | Method for producing zinc hypoxide powder in rotary kiln by taking blast furnace smoke as raw material |
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| Publication Number | Publication Date |
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| CN103555966A true CN103555966A (en) | 2014-02-05 |
| CN103555966B CN103555966B (en) | 2015-07-01 |
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| CN201310490196.2A Active CN103555966B (en) | 2013-10-18 | 2013-10-18 | Method for producing zinc hypoxide powder in rotary kiln by taking blast furnace smoke as raw material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087947A (en) * | 2015-09-16 | 2015-11-25 | 武汉钢铁(集团)公司 | Method for extracting zinc from blast furnace gas mud |
| CN106148728A (en) * | 2016-07-05 | 2016-11-23 | 湖南博环保科技有限公司 | A kind of utilize rotary kiln device to dispose the multiple method containing zinc hazardous waste simultaneously |
| CN108085511A (en) * | 2017-11-28 | 2018-05-29 | 酒泉钢铁(集团)有限责任公司 | A kind of method that zinc kiln slag production metallized charge is carried using blast furnace dust |
| CN111893295A (en) * | 2020-08-12 | 2020-11-06 | 鑫联环保科技股份有限公司 | Enrichment recovery method for zinc-containing secondary resource volatilization kiln |
| CN113122727A (en) * | 2021-04-22 | 2021-07-16 | 鑫联环保科技股份有限公司 | Method for treating iron and steel smoke dust |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078053A (en) * | 2007-06-23 | 2007-11-28 | 王树楷 | Method for extracting metal indium, zinc and bismuth from blast furnace gas ash |
| CN101191159A (en) * | 2007-11-27 | 2008-06-04 | 攀钢集团钢城企业总公司 | Technique for extracting zinc from blast furnace gas mud by using rotary kiln |
-
2013
- 2013-10-18 CN CN201310490196.2A patent/CN103555966B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101078053A (en) * | 2007-06-23 | 2007-11-28 | 王树楷 | Method for extracting metal indium, zinc and bismuth from blast furnace gas ash |
| CN101191159A (en) * | 2007-11-27 | 2008-06-04 | 攀钢集团钢城企业总公司 | Technique for extracting zinc from blast furnace gas mud by using rotary kiln |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087947A (en) * | 2015-09-16 | 2015-11-25 | 武汉钢铁(集团)公司 | Method for extracting zinc from blast furnace gas mud |
| CN106148728A (en) * | 2016-07-05 | 2016-11-23 | 湖南博环保科技有限公司 | A kind of utilize rotary kiln device to dispose the multiple method containing zinc hazardous waste simultaneously |
| CN106148728B (en) * | 2016-07-05 | 2019-06-07 | 湖南博一环保科技有限公司 | A method of a variety of hazardous wastes containing zinc are disposed simultaneously using rotary kiln device |
| CN108085511A (en) * | 2017-11-28 | 2018-05-29 | 酒泉钢铁(集团)有限责任公司 | A kind of method that zinc kiln slag production metallized charge is carried using blast furnace dust |
| CN111893295A (en) * | 2020-08-12 | 2020-11-06 | 鑫联环保科技股份有限公司 | Enrichment recovery method for zinc-containing secondary resource volatilization kiln |
| CN113122727A (en) * | 2021-04-22 | 2021-07-16 | 鑫联环保科技股份有限公司 | Method for treating iron and steel smoke dust |
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|---|---|
| CN103555966B (en) | 2015-07-01 |
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