CN105039730B - A kind of method that sulfur dioxide roasting fayalite class metallurgical slag reclaims iron - Google Patents
A kind of method that sulfur dioxide roasting fayalite class metallurgical slag reclaims iron Download PDFInfo
- Publication number
- CN105039730B CN105039730B CN201510572205.1A CN201510572205A CN105039730B CN 105039730 B CN105039730 B CN 105039730B CN 201510572205 A CN201510572205 A CN 201510572205A CN 105039730 B CN105039730 B CN 105039730B
- Authority
- CN
- China
- Prior art keywords
- iron
- sulfur dioxide
- roasting
- metallurgical slag
- acid
- 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.)
- Active
Links
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 discloses the method that a kind of sulfur dioxide roasting fayalite class metallurgical slag reclaims iron.Fayalite class metallurgical slag is passed through sulfur dioxide gas and oxygen, after being calcined at 200 1100 DEG C, then leaches iron, leaching rate with acid solution>91%, or high intensity magnetic separation is carried out, iron content reaches 66% in magnetic concentrate.The present invention can be calcined by sulfur dioxide and effectively reclaim iron in fayalite class metallurgical slag, and minimizing and the iron resourceization effect for fayalite class metallurgical slag are obvious.
Description
Technical field：
The invention belongs to metallurgical engineering and environmental project crossing domain, it is related to a kind of sulfur dioxide roasting fayalite class smelting
The method that golden waste residue reclaims iron, and in particular to a kind of that roasting recovery is carried out to the fayalite class metallurgical slag such as lead skim, copper ashes, nickel slag
The method of iron.
Background technology：
China is the first in the world steel big producer, but China's iron ore deposit is poor, and substantial amounts of iron ore deposit is by external
Import, China iron ore dependence on import continuous 6 years is more than 60%.At the same time, China produces a large amount of metallurgical slags every year,
The substantial amounts of iron resource of association in these metallurgical slags.Wherein Copper making industry produces millions of tons of copper ashes, iron content in copper ashes every year
40%；Lead smelting industry produces millions of tons of lead skims, iron content 21-31% in lead skim every year；Nickel fibers industry produces hundreds of every year
Ten thousand tons of nickel slags, nickel slag iron content 30-40%.Current these waste residues are largely stored up, and cause environmental pollution and the wasting of resources.Reclaim copper
Minimizing of the iron resource for metallurgical slag and iron resource in the fayalite class metallurgical slag such as slag, lead skim, nickel slag, make up me
The chronic shortage of state's iron ore resource is significant.
The recovery of iron is mainly and obtains iron ore concentrate by oxidation/reduction roasting-magnetic separation, directly goes back in copper ashes, lead skim, nickel slag
Original-magnetic separation obtains iron ore concentrate, Direct Reductive Melting and obtains ferroalloy.Iron is main with fayalite thing phase in copper ashes, lead skim, nickel slag
In the presence of.Fayalite is stable in properties, with oxygen carries out oxidizing roasting below 1000 DEG C or carries out reduction roasting with carbon monoxide/carbon
Burn, fayalite is converted into the iron of four oxidation two or the conversion ratio of di-iron trioxide is not high, therefore oxidation/reduction roasting-magnetic separation
Treatment fayalite class metallurgical slag effect is undesirable, and iron does not have concentration effect when particularly processing lead skim.Direct-reduction-magnetic separation
Substantial amounts of coal is then added, in 1000-1200 DEG C of reduction, Direct Reductive Melting is reduced under conditions of 1400 DEG C of ＞, energy
Consumption is high.Fayalite does not dissolve in diluted acid, it is impossible to directly leach, and with after concentrated acid pulp, is just dissolved under conditions of strong acid high temperature.
In sum, the recycling of iron resource lacks effective method in current fayalite class metallurgical slag so that
Iron resource cannot get effective recycling in these metallurgical slags.The recycling of iron resource is in fayalite class metallurgical slag
Metallurgical and environmental area problem urgently to be resolved hurrily, in the urgent need to the short process of a kind of energy-conservation, efficient, flow reclaims iron olive
The iron resource of association in stone class metallurgical slag.
The content of the invention:
The purpose of the present invention is directed to above-mentioned problem, there is provided a kind of sulfur dioxide roasting fayalite class is metallurgical useless
The method that slag reclaims iron.Sulfur dioxide and oxygen are passed through, by fayalite thing phase decomposition in metallurgical slag, then by leaching or magnetic
The mode of choosing reclaims iron.
A kind of method that sulfur dioxide roasting fayalite class metallurgical slag reclaims iron, it is characterised in that optionally following two
One kind in the scheme of kind：
(1) fayalite class metallurgical slag is passed through sulfur dioxide and oxygen roasting, by fired slags water after the completion of roasting
Or acid solution leach and obtains iron content leachate, or fired slags are carried out into high intensity magnetic separation obtain iron ore concentrate；
(2) fayalite class metallurgical slag is passed through two sections of low-temperature bakes of sulfur dioxide and oxygen, fired slags are soaked with weak acid
After going out zinc-copper valuable metal, then obtained iron content leachate or carried out high intensity magnetic separation with acid solution leaching to obtain iron ore concentrate.
Sintering temperature is 200-1100 DEG C in scheme (1), and roasting time is 15-180min.
Two sections of low-temperature bakes refer to be passed through sulfur dioxide and oxygen in scheme (2), and 30-150min is calcined at 200-600 DEG C,
It is preferred that being calcined 60-90min, turn off sulfur dioxide and oxygen and be calcined 30-150min at 600-700 DEG C, be preferably calcined 60min.
SO in two schemes2/(SO2+O2) volume ratio be 10-90%.It is preferred that SO2/(SO2+O2) volume ratio be 60-70%.
In two schemes leach iron acid solution for 20-98% sulfuric acid, the hydrochloric acid of 8-38%, the nitric acid of 14-69%,
Any one of the acetic acid of 12-56%；It is preferred that the sulfuric acid of 30-50%, the hydrochloric acid of 12-19%, the nitric acid of 20-35%, 15-28%'s
Acetic acid；The solid mass ratio of leachate is (5~20)/1, preferably (5~10)/1；1~60min of extraction time；Extraction temperature 25-100
℃。
The leaching condition tapped a blast furnace with water logging in scheme (1) is：Leachate consolidates mass ratio for (5~20)/1, and extraction time 1~
60min, 50-100 DEG C of extraction temperature.
The weak acid solution of leaching valuable metal is any one of sulfur acid, hydrochloric acid, nitric acid in scheme (2), and concentration range is
0.1-5%；The solid mass ratio of leachate is (5~20)/1；1~60min of extraction time；25-100 DEG C of extraction temperature.Weak-acid leaching
Liquid adds zinc dust precipitation to reclaim the valuable metals such as zinc-copper lead after being circulated leaching.
The magnetic field intensity that fired slags carry out high intensity magnetic separation in two schemes is the Gausses of 1.0-1.6 ten thousand, preferably 1.2 ten thousand Gausses.
Described fayalite class metallurgical slag includes lead skim, copper ashes or nickel slag.
The chemical reaction of various Fe clusters is as follows in sulfur dioxide Roasting Decomposition waste residue of the present invention：
Fe3O4+SO2(g)+O2(g)→Fe2(SO4)3 (1)
Fe2O3+SO2(g)+O2(g)→Fe2(SO4)3 (2)
FeO+SO2(g)+O2(g)→Fe2(SO4)3 (3)
Fe+SO2(g)+O2(g)→Fe2(SO4)3 (4)
2FeO·SiO2+SO2(g)+O2(g)→Fe2(SO4)3+SiO2 (5)
FeO·SiO2+SO2(g)+O2(g)→Fe2(SO4)3+SiO2 (6)
As 500 DEG C of calcination temperature ＞, Fe clusters product ferric sulfate is decomposed into di-iron trioxide in waste residue：
Fe2(SO4)3→Fe2O3+3SO3(g) (7)
In the first sets of plan of the invention, iron mainly mutually exists with fayalite thing in fayalite class metallurgical slag, this
There is a small amount of metallic iron, ferroso-ferric oxide (Fe outward3O4), di-iron trioxide (Fe2O3), ferrous oxide (FeO).Sulfur dioxide
It is ferric sulfate (Fe by (1)-(6) are reacted by the thing phase decomposition of various iron in waste residue2(SO4)3).As 500 DEG C of control sintering temperature ＜
Or during high-concentration sulfur dioxide, Fe clusters are ferric sulfate in can control fired slags；When 500 DEG C of control sintering temperature ＞ and closing two
During sulfur oxide gas, Fe clusters are di-iron trioxide (reaction (7)) in can control fired slags.Therefore sulfur dioxide decomposes iron olive
Stone metallurgical slag, can be according to Fe clusters in the condition of subsequent extracted iron control fired slags.Can fired slags leach and extract iron
Or fired slags carry out high intensity magnetic separation and obtain iron ore concentrate.When all ferric sulfate of Fe clusters in fired slags, can be gone out with water logging.
It is all of when fayalite class metallurgical slag is when being calcined for 200-600 DEG C in the second sets of plan of the invention
Fe clusters can be converted into ferric sulfate.Zinc, copper and lead can be separately converted to zinc sulfate, copper sulphate and lead sulfate in waste residue.Again will be useless
When being calcined for 600-700 DEG C, zinc sulfate and lead sulfate are not converted slag, and copper sulphate is converted into cupric oxide, and ferric sulfate is converted into
Di-iron trioxide, therefore zinc, copper and lead etc. in waste residue can in advance be extracted with weak-acid leaching, separated with iron.Weak-acid leaching liquid enters
After row circulating leaching, the valuable metals such as the recyclable lead of zinc dust precipitation, zinc, copper are added.
The method that the present invention is provided can be below 1000 DEG C with fayalite in sulfur dioxide Roasting Decomposition metallurgical slag, roasting
Iron or the means enriched iron with high intensity magnetic separation can be extracted after burning with water or acid solution.
In sum, the beneficial effects of the invention are as follows：Can be below 1000 DEG C by the mutually effectively conversion of fayalite thing；Roasting
The thing phase controllable of iron in slag；Carbon or coal need not be added, energy consumption is low；Technological process is short；It is simple to operate；Can be separated and reclaim iron olive
The valuable metals such as zinc, copper, lead in olive stone class metallurgical slag；Fired slags have a wide range of application, and can be used to prepare various iron salt solutions,
Can also be used for ironmaking.
Brief description of the drawings：
Fig. 1 is present invention process flow chart.
Specific embodiment：
The present invention is described in further details with reference to specific embodiment, specific embodiment described herein is only used
In the present invention is explained, it is not intended to limit the invention.
Embodiment 1：
Levigate extremely -200 mesh (74um) of lead skim are accounted for more than 90%, the content of Fe is 23.84% in lead skim.Lead skim is passed through
Mixed gas, gas composition SO2/(SO2+O2) it is 66%, 120min is calcined at 300 DEG C, fired slags are taken out cold after the completion of roasting
But.
The water-soluble liquid leaching of fired slags, 90 DEG C, liquid-solid ratio is 10/1, extraction time 15min, filtering point after the completion of leaching
From.Iron leaching rate is 91.25%.
Embodiment 2：
Levigate extremely -200 mesh (74um) of lead skim are accounted for more than 90%, the content of Fe is 23.84% in lead skim.Lead skim is passed through
Mixed gas, gas composition SO2/(SO2+O2) it is 60%, it is calcined 60min at 400 DEG C；Mixed gas are turned off, in 800 DEG C of roastings
Burn 30min.After the completion of roasting, fired slags are taken out and is cooled down.Fired slags are carried out into high intensity magnetic separation, magnetic field intensity is 1.2 ten thousand Gausses, magnetic
Iron content is 65.13% in selecting iron ore concentrate.
Contrast experiment 1 (lead skim oxidizing roasting-magnetic separation recovery iron)：By lead skim it is levigate to -200 mesh (74um) account for 90% with
On, the content of Fe is 23.84% in lead skim.Lead skim is passed through 2% oxygen, 800 DEG C of oxidizing roasting 30min, after the completion of roasting,
Cooling is taken out, magnetic separation is carried out under conditions of magnetic field intensity is 0.116T, iron content is 25.4% in magnetic separation of iron ore concentrate.
Contrast experiment 2 (lead skim reduction roasting-magnetic separation recovery iron)：By lead skim it is levigate to -200 mesh (74um) account for 90% with
On, the content of Fe is 23.84% in lead skim.Lead skim is passed through 5%CO, 800 DEG C of reduction roasting 60min, after the completion of roasting, is taken out
Cooling, magnetic separation is carried out under conditions of magnetic field intensity is 0.116T, and iron content is 35.86% in magnetic separation of iron ore concentrate.
Embodiment 3：
Levigate extremely -200 mesh (74um) of copper ashes are accounted for more than 90%, the content of Fe is 40.54% in copper ashes.Copper ashes is passed through
Gas, gas composition SO2/(SO2+O2) it is 60%, 60min is calcined at 1000 DEG C, fired slags are taken out after the completion of roasting is cooled down.
Fired slags are leached with 12% hydrochloric acid solution, and extraction temperature is 80 DEG C, and liquid-solid ratio is 10/1, extraction time 20min, leaching
It is separated by filtration after the completion of going out.Iron leaching rate is 94.73%.
Embodiment 4：
Thin extremely -200 mesh (74um) of nickel sizing are accounted for more than 90%, the content of Fe is 35.26% in nickel slag.Nickel slag is passed through
Mixed gas, gas composition SO2/(SO2+O2) it is 60%, 60min is calcined at 600 DEG C, fired slags are taken out cold after the completion of roasting
But.
Fired slags are leached with 30% sulfuric acid solution, and extraction temperature is 80 DEG C, and liquid-solid ratio is 10/1, extraction time 15min, leaching
It is separated by filtration after the completion of going out.Iron leaching rate is 96.23%.
Embodiment 5：
Levigate extremely -200 mesh (74um) of copper ashes are accounted for more than 90%, the content of Fe is 40.54% in copper ashes.Copper ashes is passed through
Mixed gas, mixed gas composition SO2/(SO2+O2) it is 70%, 500 DEG C of roasting 60min turn off mixed gas in 650 DEG C of roastings
60min is burnt, fired slags is taken out after the completion of roasting is cooled down.Fired slags are leached with 2% sulfuric acid solution and pre-processed.2% sulphur
After acid leaching liquor is circulated leaching, zinc dust precipitation is added to reclaim copper.
High intensity magnetic separation is carried out after fired slags pretreatment, magnetic field intensity is 1.2 ten thousand Gausses, and iron concentrate grade is 66.47%, iron essence
Copper content is 0.3% in ore deposit.
Embodiment 6：
Levigate extremely -200 mesh (74um) of lead skim are accounted for more than 90%, the content of Fe is 23.84% in lead skim.Lead skim is passed through
Mixed gas, gas composition SO2/(SO2+O2) it is 65%, 60min is calcined at 400 DEG C, mixed gas are turned off in 650 DEG C of roastings
40min, fired slags are taken out cool down after the completion of roasting.Fired slags are leached with 2% salpeter solution and pre-processed.2% nitric acid
After leachate is circulated leaching, zinc dust precipitation is added to reclaim zinc and lead.High intensity magnetic separation, magnetic field intensity are carried out after fired slags pretreatment
It is 1.2 ten thousand Gausses, iron concentrate grade is 65.05%, Zn content ＜ 1% in iron ore concentrate, lead content is 0.15%.
From above example, the inventive method is calcined fayalite class metallurgical slag, fired slags below 1000 DEG C
The leaching rate ＞ 91% of iron after leaching, iron content reaches 66% in iron ore concentrate after magnetic separation, illustrates that the present invention can effectively reclaim iron olive
Iron in olive stone class metallurgical slag.Zn content can be reduced to 1%, lead content 0.15%, copper content 0.3%, weak acid leaching in iron ore concentrate
Going out after liquid is circulated leaching is used to reclaim lead, zinc, copper, illustrates that the inventive method can also separate and recover fayalite class metallurgical useless
Lead, zinc, copper in slag etc..Iron content leachate can be used to prepare various ferrites or flocculant, and magnetic concentrate can be former as ironmaking
Material.
Claims (11)
1. a kind of method that sulfur dioxide roasting fayalite class metallurgical slag reclaims iron, it is characterised in that optionally following two
One kind in scheme：
(1) fayalite class metallurgical slag is passed through sulfur dioxide and oxygen roasting, by fired slags water or acid after the completion of roasting
Solution leach and obtains iron content leachate, or fired slags are carried out into high intensity magnetic separation obtains iron ore concentrate；
(2) fayalite class metallurgical slag is passed through into sulfur dioxide and oxygen carries out two sections of low-temperature bakes, and fired slags are soaked with weak acid
After going out zinc lead bronze valuable metal, then obtained iron content leachate or carried out high intensity magnetic separation with acid solution leaching to obtain iron ore concentrate；
Sintering temperature is 200-1100 DEG C in scheme (1), and roasting time is 15-180min；
Two sections of low-temperature bakes refer to be passed through sulfur dioxide and oxygen in scheme (2), are calcined 30-150min at 200-600 DEG C, then close
Close sulfur dioxide and oxygen and be calcined 30-150min at 600-700 DEG C；
SO in two schemes2/(SO2+O2) volume ratio be 10-90%.
2. the method that sulfur dioxide roasting fayalite class metallurgical slag according to claim 1 reclaims iron, its feature exists
In：
Two sections of low-temperature bakes refer to be passed through sulfur dioxide and oxygen in scheme (2), in 200-600 DEG C of roasting roasting 60-90min,
Turn off sulfur dioxide and oxygen and be calcined 60min at 600-700 DEG C.
3. the method that sulfur dioxide roasting fayalite class metallurgical slag according to claim 1 reclaims iron, its feature exists
In：
SO in two schemes2/(SO2+O2) volume ratio be 60-70%.
4. the method that sulfur dioxide roasting fayalite class metallurgical slag according to claim 1 reclaims iron, its feature exists
In：The acid solution that iron is leached in two schemes is the sulfuric acid of 20-98%, the hydrochloric acid of 8-38%, the nitric acid of 14-69%, 12-56%
Acetic acid any one；The solid mass ratio of leachate is (5~20)/1；1~60min of extraction time；25-100 DEG C of extraction temperature.
5. the method that the sulfur dioxide roasting fayalite class metallurgical slag according to claim 1 or 4 reclaims iron, its feature
It is：The acid solution that iron is leached in two schemes is the sulfuric acid of 30-50%, the hydrochloric acid of 12-19%, the nitric acid or 15- of 20-35%
28% acetic acid；The solid mass ratio of leachate is (5~10)/1.
6. the method that sulfur dioxide roasting fayalite class metallurgical slag according to claim 1 reclaims iron, its feature exists
In：The leaching condition tapped a blast furnace with water logging in scheme (1) is：Leachate consolidates mass ratio for (5~20)/1, and extraction time 1~
60min, 50-100 DEG C of extraction temperature.
7. the method that sulfur dioxide roasting fayalite class metallurgical slag according to claim 1 reclaims iron, its feature exists
In：The weak acid solution of leaching valuable metal is any one of sulfur acid, hydrochloric acid, nitric acid in scheme (2), and concentration range is 0.1-
5%；The solid mass ratio of leachate is (5~20)/1；1~60min of extraction time；25-100 DEG C of extraction temperature.
8. the method that the sulfur dioxide roasting fayalite class metallurgical slag according to claim 1 or 7 reclaims iron, its feature
It is：After weak-acid leaching liquid is circulated leaching in scheme (2), zinc dust precipitation is added to reclaim lead, zinc, copper valuable metal.
9. the method that sulfur dioxide roasting fayalite class metallurgical slag according to claim 1 reclaims iron, its feature exists
In：The magnetic field intensity that fired slags carry out high intensity magnetic separation in two schemes is the Gausses of 1.0-1.6 ten thousand.
10. the method that the sulfur dioxide roasting fayalite class metallurgical slag according to claim 1 or 9 reclaims iron, it is special
Levy and be：The magnetic field intensity that fired slags carry out high intensity magnetic separation in two schemes is 1.2 ten thousand Gausses.
The method that 11. sulfur dioxide roasting fayalite class metallurgical slags according to claim 1 reclaim iron, its feature exists
In：Described fayalite class metallurgical slag includes lead skim, copper ashes or nickel slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510572205.1A CN105039730B (en) | 2015-09-09 | 2015-09-09 | A kind of method that sulfur dioxide roasting fayalite class metallurgical slag reclaims iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510572205.1A CN105039730B (en) | 2015-09-09 | 2015-09-09 | A kind of method that sulfur dioxide roasting fayalite class metallurgical slag reclaims iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105039730A CN105039730A (en) | 2015-11-11 |
| CN105039730B true CN105039730B (en) | 2017-06-09 |
Family
ID=54446697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510572205.1A Active CN105039730B (en) | 2015-09-09 | 2015-09-09 | A kind of method that sulfur dioxide roasting fayalite class metallurgical slag reclaims iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105039730B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108048647A (en) * | 2017-11-07 | 2018-05-18 | 江苏省冶金设计院有限公司 | A kind of processing method of copper ashes |
| CN110357170B (en) * | 2019-08-22 | 2021-05-28 | 昆明理工大学 | Method for treating fayalite slag containing iron by using yellow phosphorus tail gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043804A (en) * | 1976-06-16 | 1977-08-23 | The Anaconda Company | Recovery of metal values from copper reverberatory slag |
| CN101519731A (en) * | 2009-04-10 | 2009-09-02 | 山东恒邦冶炼股份有限公司 | Method for extracting high arsenic complicated golden ore concentrate multielement |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3753692A (en) * | 1969-08-20 | 1973-08-21 | Ici Australia Ltd | A process for the coproduction of zinc and sulphuric acid from zinc sulphide ores |
-
2015
- 2015-09-09 CN CN201510572205.1A patent/CN105039730B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4043804A (en) * | 1976-06-16 | 1977-08-23 | The Anaconda Company | Recovery of metal values from copper reverberatory slag |
| CN101519731A (en) * | 2009-04-10 | 2009-09-02 | 山东恒邦冶炼股份有限公司 | Method for extracting high arsenic complicated golden ore concentrate multielement |
Non-Patent Citations (2)
| Title |
|---|
| Recovery of cobalt,nickel and copper from converter slag through roasting with ammonium sulfate and sulfuric acid;L.B. Sukla et al.;《Hydrometallurgy》;19860630;第16卷(第2期);摘要 * |
| 从煅烧的铜渣中回收钼;惠志恭;《中国钼业》;20120228;第36卷(第1期);22-25 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105039730A (en) | 2015-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhou et al. | Extraction and separation of copper and iron from copper smelting slag: A review | |
| CN106868307B (en) | A kind of comprehensive utilization process of pyrite cinder arsenic removal enrichment gold and silver | |
| CN106048251B (en) | A kind of process of clean and effective processing setting form | |
| CN110317945B (en) | Method for producing manganese carbonate and iron powder by chlorination reduction roasting of high-iron manganese ore | |
| CN103898330B (en) | The method of the valuable metal such as comprehensive recovery of iron, aluminium, scandium, titanium, vanadium from red mud | |
| CN104313328A (en) | Method for smelting and recovering lead and gold from reduction and sulfur fixation molten pool based on refractory gold ores and lead-containing residue raw materials | |
| CN111187927A (en) | Method for selectively sulfating and recovering rare earth in neodymium iron boron waste | |
| CN105568001A (en) | Combined high-pressure acid leaching method for cobalt alloy and oxide cobalt minerals | |
| CN101509073A (en) | Solvent extraction of ferronickel powder and waste liquor processing method | |
| CN110512095A (en) | A method of arsenic is extracted and stablized from tungsten metallurgy phosphorus and arsenic slag | |
| CN103343242B (en) | Method for interactively roasting bismuth sulfide ore and pyrolusite to extract bismuth and co-produce manganese sulfate | |
| CN104451126A (en) | Method for intensifying selective decomposition of zinc ferrite | |
| CN105039730B (en) | A kind of method that sulfur dioxide roasting fayalite class metallurgical slag reclaims iron | |
| CN105063365B (en) | Method for efficiently decomposing zinc ferrite in metallurgical waste slag. | |
| CN105087951B (en) | A kind of method for being calcined fayalite class metallurgical slag recovery iron | |
| CN117926027A (en) | Comprehensive utilization method of laterite nickel ore | |
| CN110564961B (en) | Method for reducing leached hydrocobaltite | |
| CN105112676B (en) | A kind of method of pyrite roasting fayalite class metallurgical slag recovery iron | |
| CN102776357A (en) | Method for processing lateritic nickel ore by microwave-ammonia leaching | |
| CN108330276A (en) | Method for preparing high-purity iron powder using iron vitriol slag and products thereof and application | |
| CN111593205A (en) | Method for recovering cobalt from cobalt-containing sulfuric acid residue | |
| CN103740929A (en) | Additive and method for reinforcing separation of manganese and iron through magnetic roasting-magnetic separation of high-iron manganese oxide ore | |
| CN116875759A (en) | Recycling recovery method for recovering iron from laterite-nickel ore high-pressure leaching residues | |
| CN111876607B (en) | Leaching, enriching and separating process for iron and chromium elements in electric furnace dust | |
| CN106702165B (en) | A method of leaching niobium scandium from tailing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |