CN1502709A - Technology for treating calcined pyrite by chemical submersion washing method - Google Patents
Technology for treating calcined pyrite by chemical submersion washing method Download PDFInfo
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- CN1502709A CN1502709A CNA021359040A CN02135904A CN1502709A CN 1502709 A CN1502709 A CN 1502709A CN A021359040 A CNA021359040 A CN A021359040A CN 02135904 A CN02135904 A CN 02135904A CN 1502709 A CN1502709 A CN 1502709A
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- China
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- pyrite
- chemical
- iron
- technology
- pyrite cinder
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to a process for treating calcined pyrite by using chemical submersion process. Said process includes the following steps: adding water and chemical preparation into the calcined pyrite according to a certain ratio, stirring and leaching-out, washing, settling, filtering and drying, so that the iron in the calcined pyrite can be enriched, harmful element sulfur can be removed, and its desulfurizing rate can be up to 86% and its iron recovery rate can be up to 95%.
Description
A kind of processing method for the treatment of calcined pyrite by chemical submersion washing method is to belong to technical field of environment protection.
Pyrite cinder, " waste residue " of discharging when being chemical plant production sulfuric acid.China's sulfuric acid industry adopts pyrite to make raw material more than 80%, behind boiling roaster, most S have been transformed into SO to sulphur ore in the relieving haperacidity process
2, and generate H
2SO
4, and a small amount of S and almost all Fe and other impurity element of being present in originally in the concentrate all remain in the burning slag.The burning slag can cause the pollution to atmosphere, soil, water body by all means, directly or indirectly jeopardizes the eubiosis and HUMAN HEALTH.
The annual discharge more than pyrite cinder 1,000 ten thousand t accounts for 1/3rd of residue of chemical industry in China's sulphuric acid process.Because pyrite cinder generally adopts heap to fill out disposal, fly thereby fine day human society occurred, the contamination phenomenon of red current of rainy day has caused serious pollution to environment.Heap is filled out and is tied up the soil simultaneously, has reduced the arable land; Factory must pay land requisition expense, freight charges and landfill expense etc., increases production cost.Sulfate slag is the ferruginous material of a kind of richness, and iron-holder is many about 45%, and annual iron with the sulfate slag discharging is about more than 500 ten thousand t, is equivalent to exploit in a year annual production of 2,000 ten thousand t iron mines, so it is again a kind of secondary resource, has very big potentiality to be exploited.Therefore, seek cost-effective pyrite cinder comprehensive use, improve the utilization ratio of China's waste residue of sulfuric acid, have very big society and economic benefit.
At present, external pyrite cinder utilize situation better, adopt magnetizing roasting-magnetic separation-pelletizing method to produce the smart powder of iron as Italian Meng Teka ladder Ni Chang, year handling a 450～500kt burns slag; Tennessee,USA copper company adopts residual combustion of sulfur sintering process; The Germany Shandong is strange adopts high-temp chlorination volatilization-shaft furnace pelletizing method with Du according to Regensburg factory; Together Japanese and Okayama factory of mining company adopts sulfurization roasting-water logging-sintering process etc. all to obtain good effect.These method complex process, the production cost height requires to burn slag amount height simultaneously, therefore is not suitable for the national conditions of China.China produces the smart powder of iron to burning slag, generally adopts traditional methods such as magnetic separation, gravity treatment, flotation, and effect is undesirable.The product of handling is low as iron-smelting raw material iron grade, and the content height of sulphur, Steel Plant are reluctant to use.
The objective of the invention is to adopt----chemical immersion method a kind of, the characteristics of this method are in enrichment iron, can effectively remove the sulphur that burns in the slag, desulfurization degree can reach 86%, the rate of recovery of iron can reach 95%, and the pollution problem that can effectively solve pyrite cinder, carried out comprehensive utilization of resources.This method less investment, cost is low, and economic benefit is obvious.If set up the dressing-works of handling 100,000 tons a year, then annual profitable about 1,000 ten thousand.
The object of the present invention is achieved like this: get pyrite cinder, add a certain amount of water, making pulp density is 5%, add chloroazotic acid again, making chloroazotic acid concentration is 1.6%, constantly stirs, and embathes 1 hour, sedimentation is 30 minutes then, after falling supernatant liquor, add water washing again, 4 times repeatedly, filter then, dry, produce iron-smelting raw material.
Embodiments of the invention:
Take by weighing the former burning slag of 4g pyrite, put into leaching vat, adding water, to make pulp density be 50%, adding the medicament chloroazotic acid again, to make drug concentration be 1.6%, carry out agitation leach 1 hour then, after agitation leach stops, ore pulp is changed in the rinse bath, sedimentation 30 minutes, after outwelling supernatant liquor, adding clear water again, to make pulp density be 20% to clean, and cleans repeatedly 4 times, filter then, dry, produce iron-smelting raw material.
Claims (4)
1, a kind of technology for the treatment of calcined pyrite by chemical submersion washing method is characterized in that: adopt the method for chemical immersion to handle pyrite cinder when iron obtains enrichment, residual sulfur is deviate from.
2, handle pyrite cinder according to the described chemical method of claim 1 method of embathing, it is characterized in that: adopt chloroazotic acid as leaching medicament, the concentration of its medicament is best 1.6%.
3, handle pyrite cinder according to the described chemical method of claim 1 method of embathing, it is characterized in that: the time that pyrite cinder is embathed was the best at 90 minutes.
4, described according to claim 1, after the leaching, the number of times that cleans pyrite cinder is the best with 4 times, and cleaning concentration is 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021359040A CN1234888C (en) | 2002-11-20 | 2002-11-20 | Technology for treating calcined pyrite by chemical submersion washing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021359040A CN1234888C (en) | 2002-11-20 | 2002-11-20 | Technology for treating calcined pyrite by chemical submersion washing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1502709A true CN1502709A (en) | 2004-06-09 |
| CN1234888C CN1234888C (en) | 2006-01-04 |
Family
ID=34231546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021359040A Expired - Fee Related CN1234888C (en) | 2002-11-20 | 2002-11-20 | Technology for treating calcined pyrite by chemical submersion washing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1234888C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100540692C (en) * | 2007-11-08 | 2009-09-16 | 长沙矿冶研究院 | Method for desulfurizing high-sulfur iron ore powder |
| CN102251067A (en) * | 2011-07-04 | 2011-11-23 | 彭海洋 | Mehtod for extracting reduced iron by impurity removal of pyrite cinder |
| CN102433429A (en) * | 2011-08-26 | 2012-05-02 | 沈阳博联特熔融还原科技有限公司 | Desulfuration pretreatment method for sulfate slag in sulfuric acid plant |
| CN102851486A (en) * | 2012-08-17 | 2013-01-02 | 山东明瑞化工集团有限公司 | Pyrite cinder treatment method |
| CN105833985A (en) * | 2016-03-24 | 2016-08-10 | 清华大学 | Selective separation and recycling method for industrial solid waste slag |
-
2002
- 2002-11-20 CN CNB021359040A patent/CN1234888C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100540692C (en) * | 2007-11-08 | 2009-09-16 | 长沙矿冶研究院 | Method for desulfurizing high-sulfur iron ore powder |
| CN102251067A (en) * | 2011-07-04 | 2011-11-23 | 彭海洋 | Mehtod for extracting reduced iron by impurity removal of pyrite cinder |
| CN102433429A (en) * | 2011-08-26 | 2012-05-02 | 沈阳博联特熔融还原科技有限公司 | Desulfuration pretreatment method for sulfate slag in sulfuric acid plant |
| CN102851486A (en) * | 2012-08-17 | 2013-01-02 | 山东明瑞化工集团有限公司 | Pyrite cinder treatment method |
| CN105833985A (en) * | 2016-03-24 | 2016-08-10 | 清华大学 | Selective separation and recycling method for industrial solid waste slag |
| CN105833985B (en) * | 2016-03-24 | 2018-05-11 | 清华大学 | A kind of industrial solid waste residue Selective Separation and recoverying and utilizing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1234888C (en) | 2006-01-04 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060104 |