CN103695666A - Method for enriching metal zinc in industrial solid waste by utilizing melting reduction modification furnace - Google Patents
Method for enriching metal zinc in industrial solid waste by utilizing melting reduction modification furnace Download PDFInfo
- Publication number
- CN103695666A CN103695666A CN201310751125.3A CN201310751125A CN103695666A CN 103695666 A CN103695666 A CN 103695666A CN 201310751125 A CN201310751125 A CN 201310751125A CN 103695666 A CN103695666 A CN 103695666A
- Authority
- CN
- China
- Prior art keywords
- zinc
- slag
- industrial solid
- solid waste
- iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011701 zinc Substances 0.000 title claims abstract description 59
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 58
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000009467 reduction Effects 0.000 title claims abstract description 23
- 239000002910 solid waste Substances 0.000 title claims abstract description 15
- 238000002844 melting Methods 0.000 title claims abstract description 7
- 230000008018 melting Effects 0.000 title claims abstract description 7
- 238000012986 modification Methods 0.000 title claims abstract 6
- 230000004048 modification Effects 0.000 title claims abstract 6
- 239000002184 metal Substances 0.000 title claims abstract 5
- 229910052751 metal Inorganic materials 0.000 title claims abstract 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000002893 slag Substances 0.000 claims abstract description 35
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- 239000000428 dust Substances 0.000 claims abstract description 15
- 239000000571 coke Substances 0.000 claims abstract description 8
- 239000002699 waste material Substances 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000003723 Smelting Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 4
- 239000000203 mixture Substances 0.000 claims 1
- 239000008188 pellet Substances 0.000 claims 1
- 238000002407 reforming Methods 0.000 claims 1
- 235000014692 zinc oxide Nutrition 0.000 claims 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 claims 1
- 238000005453 pelletization Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002411 adverse Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 description 22
- 238000005054 agglomeration Methods 0.000 description 7
- 230000002776 aggregation Effects 0.000 description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 239000011787 zinc oxide Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention provides a method for enriching metal zinc in industrial solid waste by using a melting reduction modification furnace. The method comprises the following steps: mixing and pelletizing at least one industrial solid waste, and then forming slag by using a slag briquetting machine; feeding the mold slag, the iron-containing waste slag and the coke into a melting reduction modification furnace; feeding hot air through a tuyere of the melting reduction modification furnace to reduce zinc in the mold slag and adhere the zinc to the dust; collecting the zinc-containing dust to finish the enrichment of metal zinc in the industrial solid waste. By adopting the method, precious non-renewable resources can be recovered, and adverse effects of mine development on the environment can be avoided.
Description
Technical field
The present invention relates to a kind of method of utilizing metallic zinc in molten minute modified with reduction stove enrichment industrial solid castoff, belong to smelting iron and steel waste material and utilize technical field.
Background technology
In Steel Plant, chemical plant, mine, in producing, produce a large amount of industrial residues and industrial dust (iron content, carbon, calcium oxide etc.).In these all industrial solid castoffs, contain more zinc oxide, and zinc being important industrial raw material, being widely used in metallurgy, machinery, electric, chemical industry, light industry, military affairs, medicine and other fields, is a kind of most valuable resource.
The zinc tool how efficient recovery is present in these industrial solid castoffs is of great significance.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of method that reclaims the zinc in industrial solid castoff, it is to adopt a molten minute modified with reduction stove metallic zinc in industrial solid castoff to be carried out to the method for enrichment, can realize efficient recovery and the enrichment of metallic zinc, have economize on resources, the advantage such as environmental protection.
For achieving the above object, the invention provides a kind of method of utilizing metallic zinc in molten minute modified with reduction stove enrichment industrial solid castoff, it comprises the following steps:
By at least one industrial solid castoff mixed pelletizing, then utilize type slag agglomeration machine to make type slag (type clinker);
Type slag, iron slag and coke are sent in molten minute modified with reduction stove;
Hot blast is sent in air port by molten minute modified with reduction stove, makes the zinc in type slag be reduced and adhere on dust;
Dust containing zinc is collected, completed the enrichment for the metallic zinc in industrial solid castoff.
In aforesaid method, preferably, the industrial solid castoff adopting is the industrial solid castoff of the oxide compound that contains zinc and/or zinc of generation during Steel Plant, chemical plant and/or mine produce.In aforesaid method, can adopt a kind of industrial solid castoff to carry out separately mixed pelletizing, also can adopt multiple different industrial solid castoff mutually to mix and carry out pelletizing afterwards, then make type slag, the particle diameter of prepared type slag may be controlled to 50mm-80mm.
In aforesaid method, preferably, the zinc content of the industrial solid castoff adopting is 1-30wt%.
In aforesaid method, preferably, the ferrous grade of the industrial solid castoff adopting (TFe) is 10-50%, and Zn content is 1-30wt%, and MgO content is 0-5wt%, and CaO content is 1-10wt%, and C content is 0-50wt%.
In aforesaid method, powder can not directly access molten minute reduction furnace and smelt, and need to adopt artificial agglomeration technology to become block furnace charge, and when pelletizing, without dimensional requirement, preferably, the granularity of finished product type slag is 6-150mm.Industrial solid castoff is prepared burden by suitable proportion and iron-containing charge, through mixed pelletizing, on type slag agglomeration machine, becomes piece, is sent to molten minute reduction furnace.Although the bed of material zone of combustion temperature of type slag agglomeration machine is more than 1100 ℃, owing to being oxidizing atmosphere, zinc can not reduce; In its bed of material bottom, temperature, far below 906 ℃, can not form zinc fume.So zinc always can not run off in agglomeration process, all enter type clinker.
In aforesaid method, preferably, in the total mass of type slag and iron slag, the content of type slag is 30-60wt%.
In aforesaid method, preferably, the temperature of hot blast is 1050-1200 ℃.
In aforesaid method, preferably, the addition of coke is 450kg/tFe, i.e. iron 450kg per ton calculates with total ferrous grade of iron-containing charge.
In aforesaid method, preferably, the iron slag adopting is that granularity is greater than 6mm and TFe(ferrous grade) the content iron slag that is greater than 40%.
When melting the reduction that divides the industrial solid castoff that contains zinc in modified with reduction stove, in stove, be high temperature reduction atmosphere (being generally greater than 900 ℃), industrial solid castoff and coke are sent in stove from furnace roof, zinc oxide in industrial solid castoff is descending with stock column in stove, to restoration of lower stack, just start reduction, under high temperature action, become soon zinc fume, with Gas Flow, rise.Hot blast enters in stove from the air port of cupola well, makes coke burning, produces coal gas; Along shaft height, more down gas temperature is higher, and reductibility is stronger; Otherwise more up gas temperature is lower, reductibility is more weak.Therefore, zinc in stove, experiencing descending, up and condensation adhesion process reduces, vaporizes.Condensation sticks to the zinc on dust, by Gas Flow, is blown to upcast, enters dust-removal system, and zinc-containing dust, by collectings such as sack cleaners, completes the enrichment of zinc.At 23.5-45.5% not etc., 1 ton of type slag of every processing, just can obtain about 5-10kg metallic zinc to the zinc content of the dust of the collectings such as sack cleaner.
Method provided by the present invention is for molten minute modified with reduction technology utilization Industrial Solid Waste, to reclaim the technique of zinc, and traditional routine ironmaking does not have the recovery of zinc.Take molten minute of 800,000 tons of year processing type slags also original production be example, can obtain the about 4000-8000 ton of metallic zinc, be equivalent to develop a medium-sized mine, can obtain the economic return of more than one hundred million units, its environmental benefit is also huge, valuable Nonrenewable resources can either be reclaimed, the disadvantageous effect of mine development to environment can be avoided again.
Embodiment
For technical characterictic of the present invention, object and beneficial effect being had more clearly, understand, existing technical scheme of the present invention is carried out to following detailed description, but can not be interpreted as restriction that can practical range of the present invention.
Embodiment
The present embodiment provides a kind of method of utilizing metallic zinc in molten minute modified with reduction stove enrichment industrial solid castoff, and it comprises the following steps:
(1) first adopting agglomeration process to carry out agglomeration processing to the industrial solid castoff of the oxide compound containing zinc (hereinafter referred to as containing zinc solid waste), wherein, should be 35% containing the TFe of zinc solid waste, Zn content is 10wt%, MgO content is 3wt%, and CaO content is 5wt%, and C content is 10wt%;
To carry out by a certain percentage mixed pelletizing containing zinc solid waste, then on type slag machine, sintering piece into, to obtain particle diameter be 50mm-80mm type clinker, be sent to a molten minute modified with reduction stove;
(2) adopt a molten minute reducing process to reduce to zinc oxide, by furnace roof, will add in stove, the crude fuel quantity that smelting 1000kg molten iron consumes is 900kg type slag, 900kg iron-containing charge and 450kg coke, by the air port at cupola well place, send into hot blast (temperature is 1100 ℃), in stove, under strongly reducing atmosphere condition, zinc is reduced, and forming zinc fume volatilization, the zinc that condensation sticks on dust is taken out of molten minute modified with reduction stove by Gas Flow;
(3) make zinc-containing dust enter bag-type dust removal system with Gas Flow and utilize sack cleaner trapping to reclaim, complete the enrichment of zinc.
The zinc of the nearly 8kg of dust of collecting is recycled, and its zinc content is 30%, and according to the calculating of process zinc balance, the organic efficiency of zinc is greater than 95%, and this explanation adopts method of the present invention can realize well the recovery of the metallic zinc in industrial solid castoff.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310751125.3A CN103695666B (en) | 2013-12-31 | 2013-12-31 | Method for enriching metal zinc in industrial solid waste by utilizing melting reduction modification furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310751125.3A CN103695666B (en) | 2013-12-31 | 2013-12-31 | Method for enriching metal zinc in industrial solid waste by utilizing melting reduction modification furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103695666A true CN103695666A (en) | 2014-04-02 |
| CN103695666B CN103695666B (en) | 2015-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310751125.3A Active CN103695666B (en) | 2013-12-31 | 2013-12-31 | Method for enriching metal zinc in industrial solid waste by utilizing melting reduction modification furnace |
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| CN (1) | CN103695666B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441687A (en) * | 2015-11-30 | 2016-03-30 | 中冶南方工程技术有限公司 | Dust recycling process and system for iron and steel plant |
| CN106319232A (en) * | 2016-08-18 | 2017-01-11 | 江苏省冶金设计院有限公司 | Method and system for processing zinc volatilization kiln slag |
| CN109486532A (en) * | 2018-09-21 | 2019-03-19 | 华中科技大学 | A system for high-temperature recovery of hazardous solid waste by focusing solar energy |
| CN110616334A (en) * | 2019-10-18 | 2019-12-27 | 内蒙古赛思普科技有限公司 | Method for cooperatively treating semicoke and zinc-containing dust |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845551A (en) * | 2009-08-24 | 2010-09-29 | 中国恩菲工程技术有限公司 | Process for recovering valuable metal from residues containing zinc |
| CN103468961A (en) * | 2013-09-27 | 2013-12-25 | 北京科技大学 | Method for processing dust containing zinc and lead in steel plant through closed cupola furnace |
-
2013
- 2013-12-31 CN CN201310751125.3A patent/CN103695666B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101845551A (en) * | 2009-08-24 | 2010-09-29 | 中国恩菲工程技术有限公司 | Process for recovering valuable metal from residues containing zinc |
| CN103468961A (en) * | 2013-09-27 | 2013-12-25 | 北京科技大学 | Method for processing dust containing zinc and lead in steel plant through closed cupola furnace |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105441687A (en) * | 2015-11-30 | 2016-03-30 | 中冶南方工程技术有限公司 | Dust recycling process and system for iron and steel plant |
| CN105441687B (en) * | 2015-11-30 | 2018-12-07 | 中冶南方工程技术有限公司 | Dust of Iron And Steel Works recycles technique and system |
| CN106319232A (en) * | 2016-08-18 | 2017-01-11 | 江苏省冶金设计院有限公司 | Method and system for processing zinc volatilization kiln slag |
| CN109486532A (en) * | 2018-09-21 | 2019-03-19 | 华中科技大学 | A system for high-temperature recovery of hazardous solid waste by focusing solar energy |
| CN110616334A (en) * | 2019-10-18 | 2019-12-27 | 内蒙古赛思普科技有限公司 | Method for cooperatively treating semicoke and zinc-containing dust |
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| Publication number | Publication date |
|---|---|
| CN103695666B (en) | 2015-08-12 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |