CN101693948B - Method for preparing steel smelting furnace materials from phosphorus-containing globulitic hematite - Google Patents
Method for preparing steel smelting furnace materials from phosphorus-containing globulitic hematite Download PDFInfo
- Publication number
- CN101693948B CN101693948B CN2009103082676A CN200910308267A CN101693948B CN 101693948 B CN101693948 B CN 101693948B CN 2009103082676 A CN2009103082676 A CN 2009103082676A CN 200910308267 A CN200910308267 A CN 200910308267A CN 101693948 B CN101693948 B CN 101693948B
- Authority
- CN
- China
- Prior art keywords
- hematite
- iron
- mass percent
- oolitic hematite
- globulitic
- 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
Images
Abstract
The invention discloses a method for preparing steel smelting furnace materials from a phosphorus-containing globulitic hematite. The method comprises the following steps: adding adhesives with certain proportion into a globulitic hematite which is broken and grinded to the granularity smaller than 0.074mm and has the mass percentage of 50% to 60%, mixing evenly, then, agglomerating, reducing and sintering dried blocks with coal as reducing agent with the sintering temperature of 1000 to 1050DEGC and with the time of 2 to 1.5h, breaking and grinding cooled reduced blocks to smaller than 0.074mm with the mass percentage of 80% to 90%, magnetically selecting and separating the blocks with the magnetic field intensity of 0.1 to 0.12T, and obtaining the metal iron powder, wherein the adhesive is mixed by sodium sulfate powder, solubor, natrium humate and sodium xanthonate, the mass percentage of sodium sulfate powder in the hematite is 5% to 8%, the mass percentage of solubor in the globulitic hematite is 1% to 2%, the mass percentage of natrium humate in the globulitic hematite is 0.5 % to 1%, and the mass percentage of sodium xanthonate in the globulitic hematite is 0.5 % to 1%. The method has high utilization efficiency, excellent dephosphorization effect, excellent product quality, high iron recovery rate, low cost and low environment pollution.
Description
Technical field
The present invention relates to a kind of phosphorous oolitic hematite and utilize method, particularly relate to and a kind ofly prepare the method for furnace charge of making steel by phosphorous oolitic hematite.
Background technology
Along with the fast development of China's steel and iron industry, high-grade and Yi Xuan smelting iron ore deposit reduce day by day, and exploitation low-grade and complicated difficult iron ore deposit is more and more urgent with comprehensive utilization.Phosphorous oolitic hematite is a kind of extremely unmanageable iron ore deposit, and China has 30～5,000,000,000 tons of reserves approximately according to statistics, mainly is distributed in areas such as Hunan, Hubei, Guangxi, Guizhou.The phosphorous height of this iron ore (0.4%～1.8%) and iron grade low (35%～50%), the phosphorus in the iron ore is composed and is stored in the collophane, and mixed in together with the chamosite that is rich in iron oxide, forms the alternate oolith structure of concentric layered shell polysaccharide; The iron oxide crystallite size is trickle in the ore, and complicated with gangue embedding cloth relation, be difficult to resolve from, sort very difficult.If do not change the occurrence status of iron and phosphorus, destroy the distinctive oolith structure of ore, iron just can't selected enrichment, and phosphorus also can't effectively be rejected.Up to the present, this resource is effectively developed as yet, still belongs to " dull " mineral resources at present.
The high-phosphorus iron ore dephosphorization method of research report mainly contains following a few class: the physical separation method comprises gravity treatment (shaking table classification, chute classification etc.) and magnetic separation (high intensity magnetic separation, low intensity magnetic separation, high-gradient magnetic separation etc.); Floatation comprises direct flotation, reverse flotation etc.; Chemistry leaches, as pickling etc.; Reduction roasting method comprises magnetizing roast and metallization reduction roasting etc.In addition, also have some process integrations that constitute by said method.
Increase (reaching about 0.40%) at phosphorus content in the ore that runs into after the exploitation of the Shanghai meishan iron mine degree of depth, have a strong impact on the problem of iron ore concentrate quality, adopt the upright ring of SLon type pulsating high gradient intensity magnetic separator, fall phosphorus by magnetic separation and obtained certain effect, concentrate iron grade can reach 56.08%, iron recovery is 94.51%, but phosphorus content only can drop to 0.246% of iron ore concentrate by 0.399% of raw ore, and the dressing product phosphorus content does not reach requirement yet.(paper: efficient magnetic plant falls application in assorted in the iron ore concentrate upgrading, and assorted academic discuss and technical conferences collection of thesis (Ma'an Mountain) fall in national iron ore concentrate upgrading in 2002,2002:39-44)
Adopting the method for reverse flotation, is that combined capturing and collecting agent is handled oolitic hematite with cation-collecting agent and non-polar oil, and process route is simple relatively, but the sorting index that obtains is not good, concentrate iron grade 55.0%, iron recovery 76.7%, and the reagent consumption amount is big, and processing cost is higher.(paper: Preliminary Study on Flotation of Oolitic Hematite, Mineral Engineering, 2004 (3): 37-40).
Adopt the poly-group of selectivity reverse floatation process, handle " Ningxiang's formula " high-phosphor oolitic iron ore of iron content 52.59%, phosphorus 0.57%, the iron ore concentrate iron content 54.11% that obtains, iron recovery reaches 90.57%, but phosphorus content is 0.236%, still can not be as blast furnace ironmaking raw material.(paper: the research of high-phosphorus iron ore dephosphorizing technology, mining and metallurgy, 2003 (2): 33-37)
Adopt the method for chemistry to handle the high-phosphor oolitic iron ore, make leaching agent with sulfuric acid, ore iron grade can be improved 4～6 percentage points, dephosphorization rate reaches 40%～50%, but acidleach dephosphorization, shortcomings such as existence leaching cost height and environmental pollution are relatively large, and might cause part soluble iron mineral dissolution in the ore, cause the loss of iron.(paper: Ningxiang's formula delvauxite soaks the research that phosphorus falls in the ore deposit method with dispergation, metal mine, 1994 (8): 30-33)
Adopt spiral chute classification-separation by shaking table-dilute sulfuric acid washing combination treatment method, can obtain grade 62%, P content is lower than 0.06% fine quality iron concentrate, but iron recovery is low, only is about 52%.(patent: a kind of prepare ironmaking with the method for iron ore concentrate, the patent No.: ZL 200710034838.2) by phosphorous oolitic hematite
Adopt magnetizing roast-magnetic separation-reverse flotation process integration to handle oolitic hematite, the bloodstone of weak magnetic is transformed into ferromagnetic magnetic iron ore, with magnetic selection method with the iron mineral enrichment, and improve the rate of recovery of iron as much as possible, under suitable liberation degree of minerals, magazines such as phosphorus, silicon are removed then by reverse flotation.Its result, gained iron ore concentrate iron grade more than 63%, phosphorus content are less than 0.15%, and iron recovery is greater than 75%.But this technological process is long, cost is high, magnetizing roast control difficulty, and concentrate iron grade and iron recovery are relatively low.(patent: a kind of beneficiation method of roe shape high-phosphorus hematite, application number: 200610124741.6)
Adopt magnetizing roast-magnetic separation-acidleach process integration can remove the phosphorus more than 90% in the oolitic hematite, concentrate iron grade reaches more than 62%, and flow process is simple, and energy consumption is low, but the still not fine solution of problem that magnetizing roast, acidleach processing method are brought.(patent: roe shape high-phosphorus hematite carry iron method for reducing phosphorus, application number: 200810163393.2)
Oolitic hematite fine grinding after the metallization reduction roasting, magnetic separation can and be answered phosphorous gangue or slag with iron granule and be separated, can remove the phosphorus more than 80% in the iron ore, concentrate iron grade has reached 80%～97%, but phosphorus content is greater than 0.25% in the product, and dephosphorization rate is still not ideal enough.(patent: a kind of production method of roe shape high-phosphorus hematite dephosphorus iron extraction, application number: 200610019950.4)
Add the Dephosphorising agent sodium carbonate that accounts for high-phosphor oolitic hematite weight 20%～30%, with the coal is that reducing agent is at 900～1000 ℃ of following reduction roasting 30～40min, reclaim wherein metallic iron with the low intensity magnetic separation method then, this flow process can obtain the product of iron grade more than 90%, phosphorus content about 0.08%.But this technology need add 20%～30% sodium carbonate, large usage quantity, and the commercial Application difficulty, and also other impurity level that additive is brought into is big.(patent: a kind of process, application number: 200910079152.4) with directly producing spongy iron from high-phosphor oolitic hematite
To sum up, because the complicated embedding cloth relation in the high-phosphor oolitic hematite stone between distinctive oolith structure and phosphorous gangue mineral and the iron mineral, when causing conventional beneficiating methods such as gravity treatment, magnetic separation, flotation directly to handle oolitic hematite, though can obtain the iron ore concentrate of certain iron grade, but the phosphorus content that will effectively reduce in the iron ore concentrate is very difficult, and when adopting methods processing roe shape iron ores such as magnetizing roast, chemistry leachings to carry the iron dephosphorization, also exist dephosphorization effect not good, poor product quality, iron recovery is low, problem such as cost height, environmental pollution are big.
Summary of the invention
Technical problem to be solved by this invention provides a kind of utilization ratio height, and dephosphorization effect is good, good product quality, and the iron recovery height, cost is low, and what environmental pollution was little prepares the method for furnace charge of making steel by phosphorous oolitic hematite.
In order to solve the problems of the technologies described above, of the present inventionly prepare the method for furnace charge of making steel by phosphorous oolitic hematite, the additive of certain proportioning is added broken in advance ore grinding, and to account for mass percent to granularity less than 0.074mm be in 50%～60% the oolitic hematite, agglomeration behind the mixing, dried briquetting coal carries out reduction roasting as reducing agent, sintering temperature is 1000～1050 ℃, time is 2～1.5h, the broken ore grinding of cooled reduction agglomerate is 80%～90% to accounting for mass percent less than 0.074mm, with the magnetic field intensity of 0.1～0.12T it being carried out magnetic separation separates, it is of high grade that the magnetic product that obtains is iron, phosphorus content is low, can be used as the metal iron powder of steel-making with raw material, described additive is by glauber salt, borax, natrium humate, SODLUM FULVATE mixes, its proportioning is respectively: it is 5%～8% that described glauber salt accounts for the oolitic hematite mass percent, it is 1%～2% that described borax accounts for the oolitic hematite mass percent, described natrium humate accounts for oolitic hematite mass percent 0.5%～1%, and described SODLUM FULVATE accounts for oolitic hematite mass percent 0.5%～1%.
That adopts technique scheme prepares the method for furnace charge of making steel by phosphorous oolitic hematite, the additive mechanism of action is: destroy the distinctive oolitic texture of ore, promote the reduction of ferriferous oxide and the gathering of growing up of iron crystal grain, promotion reduction back iron granule separates with phosphorous gangue content, for follow-up ore grinding sorting provides advantage.The degree of metalization of agglomerate reduction back iron reaches 90%～97%, and magnetic separation product iron grade reaches 90%～94%, phosphorus content is reduced to 0.07%～0.09%, and iron recovery reaches 92%～96%, and the phosphorus removal efficiency reaches 96%～98%.Compare with the product of reduction roasting magnetic separation gained under the additive-free condition, the pelletizing degree of metalization had improved 8%～10% after the present invention reduced, concentrate iron grade has improved 8%～12% after the magnetic separation, iron recovery has improved 10%～15%, dephosphorization rate has improved 35%～45%, phosphorus content is reduced to 0.07%～0.09% in the concentrate, has realized that iron and the efficient of phosphorus separate in the oolitic hematite.The sodium carbonate reduction--magnetic separation process is compared, little, the Na of additive amount of the present invention with adding
2Objectionable impurities content such as O are low, the iron powder quality is good, and the product iron grade can improve 1%～3%, phosphorus content reduces about 0.1%; Iron recovery can improve 3%～5%, and dephosphorization rate can improve 3%～7%.
The present invention is reducing agent by with addition of additive with the coal, and oolitic hematite is carried out reduction roasting, and realization iron efficiently separates with phosphorus, directly prepares the steel-making metal iron powder by oolitic hematite stone.Compare with the method for reporting in the past, the present invention has following advantage: (1) adds the efficient additive reduction roasting, promotes ferriferous oxide reduction, iron grain growth, and realization iron efficiently separates with phosphorus, and product iron is of high grade, phosphorus content is low; (2) realize saving ore dressing, sintering/coking and blast furnace ironmaking process in the long flow process of traditional iron and steel production by the direct preparation metal iron powder that satisfies the steelmaking feed requirement of high-phosphor oolitic hematite stone, technological process weak point, less energy consumption, production cost are low; (3) be reducing agent with the abundant mill coal of reserves, do not consume high grade coke, do not use acid, environmental pollution is little; (4) comprehensive utilization of resources rate height.
Description of drawings
Fig. 1 is the invented technology flow chart.
The specific embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
[reference examples]
Reference examples 1: comminution to the oolitic hematite that accounts for 60% less than 0.074mm is made ball, adopt the brown coal reduction roasting after drying, sintering temperature is 1050 ℃, and roasting time is 2h, and the degree of metalization of iron is 86.7%.After the reducting pellet cooling, broken, ore grinding extremely accounts for 90% less than 0.074mm, under the magnetic field of 0.1T it is carried out magnetic separation and separates the iron powder product that obtains concentrate iron grade 80.23%, phosphorus content 1.06%, iron recovery 77.8%, phosphorus removal efficiency 59.10%.
Reference examples 2: with reference to patent (application number: process conditions 200910079152.4), add and account for the sodium carbonate of oolitic hematite mass percent 30% in oolitic hematite, make ball behind the mixing, dry back reduction roasting, 1000 ℃ of sintering temperatures, roasting time 40min, the degree of metalization of iron is 90.5%, reducting pellet is after cooling, fragmentation, ore grinding extremely account for 90% less than 0.074mm, the magnetic separation separation obtains concentrate iron grade 91.16% under the magnetic field of 0.12T, the iron powder product of phosphorus content 0.17%, iron recovery 90.26%, phosphorus removal efficiency 89.92%.But phosphorus content is still higher in the product, and Na
2O content is also up to 2.49%.
[specific embodiment]
Embodiment 1: referring to Fig. 1, add glauber salt, the borax that accounts for oolitic hematite mass percent 1% that accounts for oolitic hematite mass percent 8%, the natrium humate that accounts for oolitic hematite mass percent 0.5%, the SODLUM FULVATE that accounts for oolitic hematite mass percent 1% is in 60% the oolitic hematite in broken, ore grinding in advance to account for mass percent less than 0.074mm, make ball behind the mixing, use the brown coal reduction roasting after drying, sintering temperature is 1050 ℃, roasting time is 1.5h, and the ferrous metal rate reaches 96.2%; Cooled reducting pellet is 80% through broken, ore grinding to accounting for mass percent less than 0.074mm, carries out the magnetic separation separation and obtain iron grade 93.84%, phosphorus content 0.078%, Na under the magnetic field of 0.1T
2The metal iron powder product of O content 0.18%, iron recovery 95.67%, the phosphorus removal efficiency reaches 97.82%.
Embodiment 2: referring to Fig. 1, add glauber salt, the borax that accounts for oolitic hematite mass percent 2% that accounts for oolitic hematite mass percent 5%, the natrium humate that accounts for oolitic hematite mass percent 1.0%, the SODLUM FULVATE that accounts for oolitic hematite mass percent 0.5% is in 50% the oolitic hematite in broken, ore grinding in advance to account for mass percent less than 0.074mm, the group of pressure behind the mixing, use the brown coal reduction roasting after drying, sintering temperature is 1000 ℃, roasting time is 2h, and the ferrous metal rate reaches 93.6%; Cooled reducting pellet is 90% through broken, ore grinding to accounting for mass percent less than 0.074mm, carries out the magnetic separation separation and obtain iron grade 92.47%, phosphorus content 0.083%, Na under the magnetic field of 0.12T
2The metal iron powder product of O content 0.23%, iron recovery 93.13%, the phosphorus removal efficiency reaches 93.58%.
Embodiment 3: referring to Fig. 1, add glauber salt, the borax that accounts for oolitic hematite mass percent 1.5% that accounts for oolitic hematite mass percent 7%, the natrium humate that accounts for oolitic hematite mass percent 0.75%, account for mass percent less than 0.074mm be in 60% the oolitic hematite to the SODLUM FULVATE that accounts for oolitic hematite mass percent 0.75% in being crushed to, make ball behind the mixing, use the brown coal reduction roasting after drying, sintering temperature is 1050 ℃, roasting time is 2h, and degree of metalization reaches 97.6%; Cooled reducting pellet is 90% through broken, ore grinding to accounting for mass percent less than 0.074mm, carries out the magnetic separation separation and obtain iron grade 94.19%, phosphorus content 0.08%, Na under the magnetic field of 0.1T
2The metal iron powder product of O content 0.20%, iron recovery 93.94%, the phosphorus removal efficiency reaches 95.94%.
Claims (1)
1. one kind prepares the method for furnace charge of making steel by phosphorous oolitic hematite, the additive of certain proportioning is added broken in advance ore grinding, and to account for mass percent to granularity less than 0.074mm be in 50%～60% the oolitic hematite, agglomeration behind the mixing, dried briquetting coal carries out reduction roasting as reducing agent, sintering temperature is 1000～1050 ℃, time is 2～1.5h, the broken ore grinding of cooled reduction agglomerate is 80%～90% to accounting for mass percent less than 0.074mm, with the magnetic field intensity of 0.1～0.12T it being carried out magnetic separation separates, it is of high grade that the magnetic product that obtains is iron, phosphorus content is low, can be used as the metal iron powder of steel-making with raw material, it is characterized in that: described additive is by glauber salt, borax, natrium humate, SODLUM FULVATE mixes, its proportioning is respectively: it is 5%～8% that described glauber salt accounts for the oolitic hematite mass percent, it is 1%～2% that described borax accounts for the oolitic hematite mass percent, described natrium humate accounts for oolitic hematite mass percent 0.5%～1%, and described SODLUM FULVATE accounts for oolitic hematite mass percent 0.5%～1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103082676A CN101693948B (en) | 2009-10-14 | 2009-10-14 | Method for preparing steel smelting furnace materials from phosphorus-containing globulitic hematite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103082676A CN101693948B (en) | 2009-10-14 | 2009-10-14 | Method for preparing steel smelting furnace materials from phosphorus-containing globulitic hematite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101693948A CN101693948A (en) | 2010-04-14 |
| CN101693948B true CN101693948B (en) | 2011-02-02 |
Family
ID=42092944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103082676A Active CN101693948B (en) | 2009-10-14 | 2009-10-14 | Method for preparing steel smelting furnace materials from phosphorus-containing globulitic hematite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101693948B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984079B (en) * | 2010-11-08 | 2012-05-23 | 武汉科技大学 | Dephosphorization and iron-increasing method of high phosphorus hematite by direct reduction |
| CN102925665A (en) * | 2011-08-11 | 2013-02-13 | 张祥麟 | Ore separation method for industrial production of above 65 iron concentrate powder through cluster analysis of low-grade hematite |
| CN102899434B (en) * | 2012-08-07 | 2014-06-04 | 中南大学 | Method for synchronously extracting boron and iron in paigeite |
| CN103215486B (en) * | 2013-04-10 | 2015-05-20 | 中南大学 | Method for preparing phosphorus iron alloy by utilizing high-phosphorus iron ore and medium and low-grade phosphorus ore |
| CN105583069B (en) * | 2015-12-21 | 2018-02-23 | 中南大学 | A kind of dressing method of high-phosphor oolitic hematite |
| CN106906327A (en) * | 2017-03-24 | 2017-06-30 | 贵州大学 | A kind of method that high-phosphor oolitic hematite efficiently carries iron |
| CN107051716A (en) * | 2017-06-14 | 2017-08-18 | 北京中矿东方矿业有限公司 | A kind of strong magnetic reverse flotation dephosphorization desiliconization ore-dressing technique of Gao Lin Caviar shape bloodstone |
| CN108480036A (en) * | 2018-03-07 | 2018-09-04 | 鞍钢集团矿业有限公司 | A kind of method of pre-selection-roasting-magnetic heavy industry skill recycling magnetic tailing |
| CN115178363B (en) * | 2022-07-08 | 2024-03-01 | 中南大学 | Ultra-high purity quartz powder prepared from mudstone-containing quartz rock and comprehensive utilization process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085737C (en) * | 1999-08-10 | 2002-05-29 | 中南工业大学 | Process for preparing Ti-enriched material from ilmenite concentrate |
| CN101293220A (en) * | 2008-06-16 | 2008-10-29 | 中南大学 | Additive agent for iron-aluminum separation for high-alumina iron ore |
| CN101293281A (en) * | 2008-06-16 | 2008-10-29 | 中南大学 | Method for directly producing metallic iron powder with high-alumina iron ore |
| CN101413055A (en) * | 2008-12-09 | 2009-04-22 | 中南大学 | Process for directly preparing nickel-iron alloy powder from laterite-nickel ore |
-
2009
- 2009-10-14 CN CN2009103082676A patent/CN101693948B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085737C (en) * | 1999-08-10 | 2002-05-29 | 中南工业大学 | Process for preparing Ti-enriched material from ilmenite concentrate |
| CN101293220A (en) * | 2008-06-16 | 2008-10-29 | 中南大学 | Additive agent for iron-aluminum separation for high-alumina iron ore |
| CN101293281A (en) * | 2008-06-16 | 2008-10-29 | 中南大学 | Method for directly producing metallic iron powder with high-alumina iron ore |
| CN101413055A (en) * | 2008-12-09 | 2009-04-22 | 中南大学 | Process for directly preparing nickel-iron alloy powder from laterite-nickel ore |
Non-Patent Citations (1)
| Title |
|---|
| 蒋庆筠.腐植酸类物质的生产与应用.《天津化工》.1989,(第3期),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101693948A (en) | 2010-04-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101693948B (en) | Method for preparing steel smelting furnace materials from phosphorus-containing globulitic hematite | |
| CN101413055B (en) | Process for directly preparing nickel-iron alloy powder from laterite-nickel ore | |
| CN100490981C (en) | Beneficiation method for weak magnetic iron ores such as siderite, limonite and siderite paragenetic ore | |
| CN101457288B (en) | Method for reducing phosphorus by chloridization separation-weak of high phosphor iron ore | |
| CN101638704B (en) | Method for extracting iron from copper smelting waste residue | |
| CN102363218B (en) | Method for producing copper-powder-containing iron by reducing copper-containing furnace cinders directly | |
| CN101338361A (en) | Method for reducing phosphorus in high phosphorus haematite or hematite and limonite ore by magnetization roasting-leaching method | |
| CN111686925B (en) | Mineral processing technology for recovering rare earth, fluorite and barite from low-grade rare earth ore | |
| CN101586188B (en) | Two-stage roasting mineral smelting integrated technique of laterite | |
| CN101862703A (en) | Separation-smelting combined method for producing iron ore concentrate from oolitic lean hematite | |
| CN103757200B (en) | Method for separating and enriching ferronickel from laterite-nickel ore | |
| CN105478232B (en) | A kind of beneficiation method from graphite mould navajoite enrichment vanadic anhydride | |
| CN101550483A (en) | Combined flow path processing method of laterite nickel | |
| CN101418359A (en) | Method for extracting iron and high grade ferro-nickel alloy from laterite nickle mine | |
| CN102021351A (en) | Integrated approach to enriching nickel from nickel oxide laterite ore | |
| CN104087753A (en) | Method for producing high-nickel-grade nickel-iron powder by laterite-nickel ore autocatalytic reduction | |
| CN109647616B (en) | Method for comprehensively recovering magnetite and copper minerals from copper slag flotation tailings | |
| CN100469905C (en) | Method forpreparing iron concentrate for making iron from phosphorus-containing oolitic hematite | |
| CN103740933A (en) | Method for producing ferro-nickel alloy from nickel oxide material | |
| CN102513203B (en) | Method for recycling high-phosphorus/sulfur siderite resource | |
| CN106636521A (en) | Method and system for improving grinding separation effect of reduced pellets containing metal iron | |
| CN101293220B (en) | Additive agent for iron-aluminum separation for high-alumina iron ore | |
| CN101864506A (en) | Method for preparing direct reduced iron from low-grade high-phosphorus high-silicon iron ore | |
| CN103555930A (en) | Method for reduction roasting of high-magnesium poor-quality nickel laterite | |
| CN109825698A (en) | A method of high titanium products and sponge iron are produced with titanium-containing iron ore stone and coal slime |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| 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 |