CN1023611C - Process for smelting zinc from zinc bearing scale in blast-furnace gas washing waste water - Google Patents
Process for smelting zinc from zinc bearing scale in blast-furnace gas washing waste water Download PDFInfo
- Publication number
- CN1023611C CN1023611C CN92113606A CN92113606A CN1023611C CN 1023611 C CN1023611 C CN 1023611C CN 92113606 A CN92113606 A CN 92113606A CN 92113606 A CN92113606 A CN 92113606A CN 1023611 C CN1023611 C CN 1023611C
- Authority
- CN
- China
- Prior art keywords
- zinc
- blast
- waste water
- gas washing
- furnace gas
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y02W30/54—
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a method for extracting zinc from scale deposit containing zinc in blast-furnace gas washing waste water, which is characterized in that scale deposit containing zinc in blast-furnace gas washing waste water and coke powder are fully mixed according to a weight ratio of (6.5 to 7.5): (3.5 to 2.5), blended uniformly by adding water for balling, and smelted by distillation, the temperature is controlled between 1050 and 1100 DEG C for at least 36 hours, and zinc can be obtained. The present invention has the advantages that the required equipment is less, the cost is low, the amount of zinc contained in the smelted zinc can reach 98.9%, environmental pollution can be reduced, harm can be changed into benefit, and waste can be changed into valuables. The present invention provides a novel path of use for the comprehensive utilization of three wastes of the scale deposit containing zinc in blast-furnace gas washing waste water, and energy resources are saved.
Description
What the present invention relates to is a kind of zinc metallurgy method, particularly be a kind ofly to contain the method for extracting zinc the zinc incrustation scale from wastewater from blast furnace.
In the blast furnace ironmaking production process, from blast furnace furnace roof emerge a large amount of inflammable gass and dust and other impurity and gas (being referred to as motherwort coal gas).If these gases directly enter atmosphere, not only waste energy, also with pollutant atmosphere, so after blast furnace gas is all answered purifying and cooling, recycled as the secondary energy of Steel Plant.
Sophisticated gas purification process is that water cleans coal gas, cleans later water and is referred to as wastewater from blast furnace.With the blast furnace gas washing water recycle system is set more both at home and abroad, makes washes realize recycle.In actual motion all scale problems can take place through the recirculated water of precipitation after the cooling process, but blocking pipe when serious, the obstacle operation, thus annually need removing incrustation scale 2-3 time, and the zinc content in incrustation scale is very big.With Sichuan Province's Panzhihua Iron is example, and the zinc content in the incrustation scale can reach 31～48%, and is present in the incrustation scale with the zinc oxide form, extracts the important channel that zinc has just become save energy so contain the zinc incrustation scale from wastewater from blast furnace.
" metal and inorganic wastes reclaim encyclopedia " (the metal part) of U.S. M, western fourth work " reclaims in the zinc from Steel Mill's stove dirt and lists three patents (being United States Patent (USP) 4069315,4071357,4024462)." United States Patent (USP) 4069315 disclosed a kind of methods are to reclaim the zinc-containing dust of iron-smelting blast furnace or ironmaking converter; and and the water dissolution zinc of saturated carbonic acid gas after again row extract; be dissolved in the zinc of carbonic acid gas saturation water, precipitate by the carbonic acid gas of getting rid of wherein.United States Patent (USP) 4071357 disclosed a kind of methods are to reclaim zinc oxide free from foreign meter substantially from fume from steel making or analogue, and its operation comprises: leach flue dust, solving zinc and objectionable impurities with dense ammonia and carbonic acid gas; Leach filtrate with the zinc displacement, remove impurity copper, cadmium and lead; Distill immediately after displacement filtrate, the precipitation zinc carbonate is discharged ammonia, carbonic acid gas and iron; Filter the residue that output object is mainly alkaline carbonic acid zinc, sulphur and chromium.Wash residue then, slough solvable vitriol, carry out drying and high-temperature roasting again, alkaline carbonic acid zinc is broken into zinc oxide product.United States Patent (USP) 4024462 discloses the method for the zinc in the material that a kind of recovery contains zinc and iron.Material leaches with sulfuric acid, and the final pH value reaches 3～5.5.For the precipitated impurities metal, to add zinc powder in the infusion solution.In organic solvent, use dialkyl phosphoric acid solution extracting zinc then, with sulfuric acid extracting zinc from organic solution, at last the zinc in the sulphuric acid soln is recycled into metallic zinc or zinc sulfate again.More than the technology introduced of three patents all complicated, and investment is big, contains under the few situation of zinc incrustation scale quantity at wastewater from blast furnace, adopting above-mentioned technology is to lose more than gain.
In view of above reason, but the objective of the invention is for provide a kind of invest little, cost is low, can be in enormous quantities also short run contain the method for extracting zinc the zinc incrustation scale from wastewater from blast furnace.
Zinc metallurgy method steps of the present invention is as follows:
1./, wastewater from blast furnace is contained zinc incrustation scale and coke powder with (6.5～7.5): the ratio thorough mixing of (3.5～2.5) (weight ratio);
2./, add suitable water mixing balling-up, dry moisture slightly;
3./, the mixture after the balling-up is smelted with distillation method, temperature was controlled between 1050～1100 ℃ 36 hours at least, collect liquid metal zinc casting ingot get final product metallic zinc,
In above process, coke powder is a reductive agent, and its reaction formula is:
The weight ratio that above-mentioned wastewater from blast furnace contains zinc incrustation scale and coke powder is 7.5: 2.5, this kind ratio zinc metallurgy the best.
Above-mentioned wastewater from blast furnace adds suitable rare liming mixing balling-up after containing zinc incrustation scale and coke powder thorough mixing, because of CaO in the liming can remove the sulfide that contains in the zinc incrustation scale, so use rare liming zinc metallurgy effective.
Mostly be most 4000 yuan with one ton of zinc cost of zinc metallurgy of the present invention, and existing market zinc valency is 6400 yuan/ton, can make a profit 1/3.Required equipment is few, and cost is low, and the zinc zinc content of producing can reach 98.9%.Can reduce environmental pollution, reduce volume of cargo in storage, prolong stockyard working life.Turn harm into good, turn waste into wealth, provide the use approach, can be widely used in the iron work of blast furnace gas washing water circulation with facility for wastewater from blast furnace contains zinc incrustation scale " three wastes " comprehensive utilization, but also small serial production in enormous quantities, save energy.According to the analysis report of Flos Bombacis Malabarici iron and steel research institute, conservative some the reckoning from the high coal gas washing wastewater of climbing the steel generation contains 1 year recyclable metallic zinc more than 100 tons the zinc incrustation scale.
Introduce embodiments of the invention below, but protection scope of the present invention is not limited only to the following examples:
Wastewater from blast furnace is contained zinc incrustation scale and coke powder add suitable rare liming mixing balling-up on pan-pelletizer (being advisable) after with 7.5: 2.5 ratio (weight ratio) thorough mixing, dry moisture slightly with the granular of lima bean size.The mixture of balling-up is placed in the retort of flame reverberatory furnace, smelt in the flame reverberatory furnace with distillation method, temperature was controlled between 1050～1100 ℃ about 48 hours under normal pressure, collect the liquid metal zinc ingot metal get final product metallic zinc.
Above-mentioned wastewater from blast furnace contain zinc incrustation scale and coke powder also can 6.5: 3.5 or 7: 3 weight ratio (or other weight ratio) mix.
Claims (3)
1, process for smelting zinc from zinc bearing scale in blast-furnace gas washing waste water is characterized in that described zinc metallurgy method steps is as follows:
1./, wastewater from blast furnace is contained zinc incrustation scale and coke powder with (6.5～7.5): the ratio thorough mixing of (3.5～2.5) (weight ratio);
2./, add the balling-up of suitable water mixing, dry moisture slightly;
3./, the mixture after the balling-up is smelted with distillation method, temperature is controlled between 1050-1100 ℃, constant temperature is 36 hours at least, collect liquid metal zinc casting ingot get final product metallic zinc.
2, process for smelting zinc from zinc bearing scale in blast-furnace gas washing waste water as claimed in claim 1 is characterized in that the weight ratio that described wastewater from blast furnace contains zinc incrustation scale and coke powder is 7.5: 2.5.
3, process for smelting zinc from zinc bearing scale in blast-furnace gas washing waste water as claimed in claim 1 is characterized in that adding the balling-up of suitable rare liming mixing after described wastewater from blast furnace contains zinc incrustation scale and coke powder thorough mixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92113606A CN1023611C (en) | 1992-11-30 | 1992-11-30 | Process for smelting zinc from zinc bearing scale in blast-furnace gas washing waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92113606A CN1023611C (en) | 1992-11-30 | 1992-11-30 | Process for smelting zinc from zinc bearing scale in blast-furnace gas washing waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1071965A CN1071965A (en) | 1993-05-12 |
| CN1023611C true CN1023611C (en) | 1994-01-26 |
Family
ID=4946507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92113606A Expired - Fee Related CN1023611C (en) | 1992-11-30 | 1992-11-30 | Process for smelting zinc from zinc bearing scale in blast-furnace gas washing waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023611C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893857B (en) * | 2017-02-16 | 2018-05-29 | 钢研晟华工程技术有限公司 | A kind of method that sintering process reduces flue gas pollutant discharge |
-
1992
- 1992-11-30 CN CN92113606A patent/CN1023611C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1071965A (en) | 1993-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104911356A (en) | Comprehensive recovery technology of solid waste gas ash and zinc-containing ferrovanadium slag | |
| CN103924091A (en) | Smelting method for removing fluorine and chlorine out of fluorine-and-chlorine-containing inferior zinc oxide and enriching valuable metals | |
| CN101078052A (en) | Method for synthetically reclaiming iron and non-ferrous metal from solid waste of iron and steel plant | |
| US4940487A (en) | Process for utilizing of zinc-containing metallurgical dusts and sludges | |
| CN105648228A (en) | Rotary hearth furnace for processing lead-zinc-containing melting slag | |
| Mager et al. | Recovery of zinc oxide from secondary raw materials: new developments of the Waelz process | |
| CN106636656A (en) | Method for recovering valuable metal from copper smelting white smoke | |
| CN111893310A (en) | Harmless recycling treatment method for solid hazardous waste | |
| CN110846511B (en) | Method for co-processing zinc leaching residues and gypsum residues | |
| CN108504872B (en) | Method for comprehensively treating white smoke dust and arsenic sulfide slag | |
| CN105671329A (en) | Rotary hearth furnace and method for treating lead-zinc smelting slag | |
| CN1323177C (en) | High Iron zinc calcine process method | |
| CN1470657A (en) | Steel making and iron making superlow zine dust recovery and treatment process | |
| DE3536635A1 (en) | Process and equipment for recovering especially iron as well as zinc, lead and other non-ferrous metal constituents from oxide materials of high iron content | |
| CN113044815A (en) | Method and system for comprehensively treating selenium-tellurium-containing waste | |
| CN1023611C (en) | Process for smelting zinc from zinc bearing scale in blast-furnace gas washing waste water | |
| Zheng et al. | Solid waste remediation in the metallurgical industry: Application and environmental impact | |
| CN109576505A (en) | A kind of method that zinc cobalt efficiently separates | |
| CN114717424B (en) | Smelting method for recycling copper, cobalt and nickel by utilizing low-grade solid waste raw materials containing copper, cobalt and nickel | |
| CN215667159U (en) | System for comprehensive treatment contains selenium tellurium waste material | |
| CN111647704B (en) | Zinc recovery method based on HIsmelt smelting reduction furnace | |
| Hodge | Wastes problems of the iron and steel industries | |
| CN114045397A (en) | Method for recovering wet smelting iron slag | |
| CN103466686A (en) | Method for quickly removing arsenic in zinc oxide with high arsenic content and producing zinc sulfate by using zinc ash and sodium peroxycarbonate of iron and steel plant | |
| US4292283A (en) | Method for the recovery of zinc |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |