CN102827985A - Method for preparing novel excellent fine granule trace alloy iron powder - Google Patents
Method for preparing novel excellent fine granule trace alloy iron powder Download PDFInfo
- Publication number
- CN102827985A CN102827985A CN2012102570246A CN201210257024A CN102827985A CN 102827985 A CN102827985 A CN 102827985A CN 2012102570246 A CN2012102570246 A CN 2012102570246A CN 201210257024 A CN201210257024 A CN 201210257024A CN 102827985 A CN102827985 A CN 102827985A
- Authority
- CN
- China
- Prior art keywords
- iron powder
- reduction
- microalloy
- quality
- preparation
- 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.)
- Pending
Links
Images
Abstract
The invention discloses a method for preparing novel excellent fine granule trace alloy iron powder, which is developed by the inventor on the basis of two inventions. According to the method, vanadium and titanium iron ore concentrate inner coordination reducing agent and catalyst briquetting, low-temperature catalytic reducing, efficient grinding, selecting and separating and other new processes are integrated with a new technology, the method comprises the steps of compounding, briquetting, charging, reducing, grinding and selecting, fine reducing, classifying and the like, and extracting two comprehensive utilization products, namely primary reduced iron powder and vanadium and titanium-rich materials from vanadium and titanium iron ore concentrate; and preparing the obtained primary reduced iron powder into the excellent fine granule trace alloy iron powder which is required by the market through secondary reduction and classification via using a deoxidized annealing technology. Compared with the existing method for producing the iron powder from the tunnel kiln reduced iron concentrate and iron scale, firstly, the diversity of the raw materials for producing the iron powder is widened, and a new method is provided for the comprehensive utilization of multi-metal paragenic ore and difficultly selected iron ore in China; and secondarily, the fine granule trace alloy iron powder is the excellent iron powder with high cost performance, and has the performance which can be comparable to iron powder of the international famous brands, so opportunities for exporting the domestic iron powder to the outside world and improving the international competitiveness are provided.
Description
Technical field
The present invention relates to mineral resources comprehensive utilization and field of powder metallurgy, be specifically related to a kind of method that from sefstromite concentrate, prepares novel high-quality particulate microalloy iron powder.
Background technology
The method of producing iron powder both at home and abroad has tens of kinds more than; But what realize industrialization is the reduction method of raw material with high-purity refined iron-mineral and iron scale only; It is reductive agent that leading now technology of producing iron powder remains with the solid carbon, the method for reduced iron concentrate or iron scale (He Genasifa) in the road kiln.But the industrial practice that selects many metals mineral intergrowth to prepare particulate microalloy iron powder with difficulties such as sefstromite concentrates still is not reported.
The FSU reported the R&D work for preparing reduced iron powder with sefstromite concentrate in 1961, added 20% sodium-chlor, in 1150-1200 ℃ of direct reduction v-ti magnetite concentrate, separated through magnetic mill, can obtain iron powder and the TiO of iron content more than 98%
2The rich titanium material of content more than 70%; Japanese Patent adds 30% yellow soda ash, and in 1110-1200 ℃ of reduction, wearable selects, and can obtain the iron powder concentrate of iron content about 93%, power supply stove steel-making behind the sintering; Nz has reported the test-results of using porcelain factory tunnel kiln reduction titanium magnet ore concentrate, but that iron, titanium separate is undesirable; The FSU in 1978 reports not only and contains multielement iron minerals such as vanadium, titanium, chromium, nickel with the area, Ural and made alloy iron powder (but also claiming the native alloy iron powder).But above-mentioned these reports still do not have 1 example at present and are successfully applied in the industrial production.
Be the extremely abundant v-ti magnetite ore resources of exploitation China Panzhihua Region; From the sixties in last century; Liang Jingdong and innovation team rope thereof have systematically been carried out earlier small-sized, expansion and the pilot-plant test that the tunnel kiln reduction mill selects method comprehensive utilization Flos Bombacis Malabarici ilmenite concentrate and sefstromite concentrate; Declared the patent of invention that the patent No. is ZL91106655.1 in 1991---" getting the method for micro alloy iron powder with the reduction grinding legal system ", authorized patent for invention in January, 1997.Declared the patent No. in 2008 again and be 200810143675.6 patent of invention---" a kind of industrialization method of new comprehensive utilization sefstromite concentrate ", in April, 2012 Grant Patent Right for Invention.Beam utilizes the flexible running advantage of private enterprise through people such as winters in recent years, when declaring patent, with a plurality of business tie-ups, carries out the enforcement of patent, on the road of industrialization, obtains new breakthrough and considerable progress again.Development object is extended to multiple mineral intergrowth and difficult ore dressing source from single mineral resources; Preparing method and corollary apparatus move towardss to be provided as complete equipment from test and found the factory the stage with the design of technology, have built up in Xinjiang to produce 150000 tons per year and build up with elder brother's steel and to produce 5 tons demonstration plant per year, operation soon at present.The independent research patent is continual deeply to be implemented, and will select the comprehensive utilization of polymetallic ore for China's difficulty and start a new road of industrialization that has independent intellectual property right.
Summary of the invention
The present invention is in the process of implementing ZL91106655.1 and 200810143675.6 patents; From Mineral resources characteristics and enterprise to product performance and kind needs; Update, replenish, perfect, a kind of method for preparing high-quality particulate microalloy iron powder that can realize industrialization of developing.
Technical problem to be solved by this invention provides a kind of preparation method of high-quality particulate microalloy iron powder; The iron recovery of this method is higher; The iron powder oxygen level that obtains is 0.2%; Granularity-325 order >=95%, TFe grade 98.5～99.5%, and solid solution has trace V, Ti, Co, Ni alloying element.Detect through authoritative institution, pilot-plant test of the present invention compares with the quality index of sefstromite concentrate multielement analysis, product index, quality standard and domestic and international Premium Brands product, and the result is shown in table 1, table 2, table 3, table 4:
Table 1 pilot-plant test is used the sefstromite concentrate multielement analysis
The chemical ingredients (%) of table 2 pilot-plant test alloy iron powder
Table 3 pilot-plant test alloy iron powder craft performance
The power spectrum micro-area composition of table 4 alloy iron powder 3 of the present invention is analyzed (%)
| Sequence number | Fe | Co | Ni | Ti | V |
| 1 | 98.68 | 0.024 | 0.026 | 0.06 | 0.02 |
| 2 | 98.62 | 0.031 | 0.021 | 0.07 | 0.00 |
| 3 | 98.65 | 0.028 | 0.024 | 0.07 | 0.00 |
| 4 | 98.51 | 0.012 | 0.025 | 0.05 | 0.02 |
| 5 | 98.61 | 0.035 | 0.025 | 0.04 | 0.00 |
| On average | 98.61 | 0.026 | 0.025 | 0.06 | 0.01 |
Show that from the comparative result of table 1～table 4 all detection indexs of the particulate microalloy iron powder that the present invention develops have reached country-level reduced iron powder standard, near the standard of international trump iron powder; Through the microcell spectroscopy detection, solid solution has trace elements such as Co, Ni, V, Ti in iron powder; Through the application test of 20,000 above sintered metal products, its intensity, fineness, wear resistance and formability all are superior to the sintered metal product performance of existing industrial iron powder compacting, are a kind of novel high-quality particulate microalloy iron powders worthy of the name.
The technical scheme that the present invention adopts is: select and new technology of preparing such as separate and be integrated in one joining reductive agent and catalyzer briquetting, low-temperature catalyzed reduction, efficient mill in the sefstromite concentrate; Select through batching, mixing briquetting, charging, reduction, mill, from vanadium titano-magnetite, isolate reduced iron powder and rich vanadium titanium material; A reduced iron powder that obtains is used the deoxidized annealing technology, through smart reduction and classification, processes the required high-quality particulate microalloy iron powder in market.Preparing method's step is following:
The first step in the technique scheme is a batching: raw materials usedly is made up of sefstromite concentrate, catalyzer, carbonaceous reducing agent, presses 100: 15～20: 15～25 weight ratio compatibilities; Wherein said sefstromite concentrate can be the vanadium titano-magnetite of different grades, considers technology, economic dispatch index, preferentially selects the higher-grade sefstromite concentrate that obtains through ore dressing for use; Wherein said catalyzer is a sodium-chlor, can be at least a in edible salt, rock salt, well salt, sea salt, the lake salt, preferentially selects local superior resources for use; Wherein said carbonaceous reducing agent can be a metallurgy industry carbonaceous reducing agent commonly used, as: at least a in hard coal, broken Jiao, refinery coke, brown coal, the coke, preferentially select local superior resources for use.
In the technique scheme second step is the mixing briquetting: become ingot at fully automatic hydroform machine briquetting behind the abundant mixing of batching with the first step, this is the significant improvement to traditional powder tinning, and compact density can be at 1.4～2.6g/cm
3Adjustment arbitrarily, preparation alloy iron powder is transferred to 2.2～2.6g/cm
3, not only improve production capacity, reduce discharging, can also improve the quality of reduced iron powder.
In the technique scheme the 3rd step is charging, reduction: the second step briquetting is feeded, in tunnel, be heated to 1000～1050 ℃ and be incubated 5～60h then, reduce, obtain reducing ingot; Wherein said charge cask can adopt conventional containers; Like silit, stainless steel vessel etc.; Consider heat transfer, resistance to elevated temperatures and the cost performance of container, preferentially select the heating resisting metal jar for use, recommend to adopt the contriver with the gradient refractory alloy cylinder of steel of units concerned's cooperation independent research; When wherein said tunnel reduces, can pass through the control catalyst consumption, can guarantee that the temperature of reduction process drops to 1050 ℃, low-temperature reduction can be realized the miniaturization of metallic iron grain size number, helps improving the performance index of alloy iron powder; Simultaneously, because the reduction of reduction temperature, the reductive material is very easily broken, and prolong the work-ing life of mechanize delivery device greatly.
In the technique scheme the 4th step is that the mill choosing separates: the reduction ingot of the 3rd step output is broken, levigate, magnetic separation separation obtains reduced iron powder and rich vanadium titanium material; Wherein said levigate, three sections open circuits of magnetic separation employing wet type stage grinding staged magnetic separations; Adopt long tube ball mill when levigate, grinding media is the steel ball of 8～20mm, and the downstream-type magnetic separator is adopted in magnetic separation, and mill is elected to be industry and adopts the choosing of open circuit gravity flow mill; Wherein said levigate processing parameter with magnetic separation is selected, and then confirms according to the purposes and the quality standard test of required alloy iron powder.
In the technique scheme the 5th step is smart reduction: with a reduced iron powder of the 4th step output; Send into the fine reduction furnace that reducing medium is hydrogen or cracked ammonium gas; 800～850 ℃ of reduction temperatures carry out the essence reduction, output secondary reduction iron powder under 30～60 minutes recovery times; The water cut of a wherein said reduced iron powder requires to be controlled at below 5～10%.
In the technique scheme the 6th step is classification: the secondary reduction iron powder of the 5th step output obtains granularity-200 order 85～95%, TFe grade 98.5～99.5% through pulverizing, classification, and solid solution has the high-quality particulate microalloy iron powder of trace V, Ti, Co, Ni.
The present invention compares with the method (He Genasifa) that existing tunnel kiln reduced iron concentrate and iron scale prepare iron powder, and the one, widened the raw materials used variety of preparation iron powder, for a kind of new method has been started in the comprehensive utilization of China's many metals mineral intergrowth, refractory iron ore; The 2nd, particulate microalloy iron powder is the high high-quality iron powder of a kind of cost performance, can match in excellence or beauty with the performance of international famous brand iron powder, for homemade iron powder is gone abroad, improves international competitiveness and has created opportunity.
Description of drawings
Fig. 1 prepares the process flow diagram of alloy iron powder method for sefstromite concentrate, among the figure: the 1st, sefstromite concentrate, the 2nd, catalyzer, reductive agent, the 3rd, get the raw materials ready, the 4th, tunnel kiln reduction; The 5th, primary grinding, the 6th, wet magnetic separation, the 7th, secondary grinding, the 8th, the once smart magnetic separation of wet type, the 9th, wet type is swept magnetic separation; The 10th, the smart magnetic separation of wet type secondary, the 11st, the smart reduction of steel band stove, the 12nd, crushing and screening, the 13rd, close batch shaping; The 14th, particulate microalloy iron powder, the 15th, powdered metal parts, the 16th, dry, the 17th, rich vanadium titanium material.
Fig. 2 prepares the device association synoptic diagram of alloy iron powder method for sefstromite concentrate, among the figure: the 1st, sefstromite concentrate, the 2nd, catalyzer, the 3rd, solid reductant; The 4th, batching, the 5th, comprehensive mixer, the 6th, fully automatic hydroform machine (ZY1200T), the 7th, the entrucking of mechanical manipulator fixture block; The 8th, kiln car tinning, the 9th, tunnel (13.4 meters gas fired tunnel kilns), the 10th, discharging machine, the 11st, primary grinding machine; 12 is a stages of magnetic separation machine (wet type cydariform low intensity magnetic separation machines), the 13rd, and the secondary grinding machine, 14 is two sections combination magnetic separators, the 15th, the overflow of mine tailing settling bowl; The 16th, the magnetic force water trap, the 17th, the steel band reduction furnace (240mm * 9000mm), the 18th, kibbler, the 19th, ball mill is used in the iron powder shaping.
Embodiment
To climb the pilot-plant test that skill flower sefstromite concentrate prepares high-quality fine alloy iron powder is example; With Fig. 1, Fig. 2 contrast; Specifically describe embodiment of the present invention: with 100 parts of sefstromite concentrates, prepare burden, use comprehensive mixer to join and be compound with 15 parts of ratios of catalyzer with 18 parts of carbonaceous reducing agents; Compound inputs to hopper, advances industrial fully automatic hydroform machine and is pressed into the piece material; The piece material is with the mechanical manipulator fixture block kiln car of packing into, puts graded alloy reduction jar then, and push tunnel with kiln car pusher and reduce, 1050 ℃ of reduction temperatures, insulation 60h obtains reducing ingot; The reduction ingot is broken, be milled down to-200 orders 80%, and magnetic separation obtains rough concentrate and mine tailing, and coarse concentrate regrinding carefully arrives-200 orders 85%; Magnetic separation obtains concentrate and chats 1; Concentrate regrinding carefully arrives-200 orders 90%, and magnetic separation obtains reduced iron powder and chats 2, and mine tailing and chats 1 chats 2 are mixed into rich vanadium titanium material; A reduced iron powder of moisture≤5%～10% gets in the fine reduction furnace, and as reducing medium, 800 ℃ are incubated 60 minutes with hydrogen; Take out after cooling and pulverize; Obtain the secondary reduction iron powder, use the ball mill shaping, prepare the required novel high-quality particulate microalloy iron powder in market.
Claims (7)
1. the preparation method of a novel high-quality particulate microalloy iron powder; It is characterized in that new technology of preparing such as separating and being integrated in one with joining reductive agent and catalyzer briquetting, low-temperature catalyzed reduction, efficient mill choosing in the sefstromite concentrate; Select through batching, mixing briquetting, charging, reduction, mill, from vanadium titano-magnetite, isolate reduced iron powder and rich vanadium titanium material; A reduced iron powder that obtains is used the deoxidized annealing technology, through smart reduction and classification, processes the required high-quality particulate microalloy iron powder in market, and its chemical ingredients, process performance index are respectively:
The chemical ingredients (%) of pilot-plant test alloy iron powder
Pilot-plant test alloy iron powder craft performance
Detect through authoritative feeler mechanism; All detect the standard that index all reaches country-level reduced iron powder; Near international trump iron powder standard; Solid solution has trace elements such as Co, Ni, V, Ti in iron powder, and its intensity, fineness, wear resistance and formability all are superior to the sintered metal product performance of existing industrial iron powder compacting, are a kind of novel high-quality particulate microalloy iron powders worthy of the name.
2. according to the preparation method of the said a kind of novel high-quality particulate microalloy iron powder of claim 1, it is characterized in that batching: raw materials usedly forms, press 100: 15～20: 15～25 weight ratio compatibilities by vanadium titano-magnetite, catalyzer, carbonaceous reducing agent.Wherein said sefstromite concentrate can be the vanadium titano-magnetite of different grades, considers technology, economic dispatch index, preferentially selects the higher-grade sefstromite concentrate that obtains through ore dressing for use; Wherein said catalyzer is a sodium-chlor, can be at least a in edible salt, rock salt, well salt, sea salt, the lake salt, preferentially selects local superior resources for use; Wherein said carbonaceous reducing agent can be a metallurgy industry carbonaceous reducing agent commonly used, as at least a in hard coal, broken Jiao, refinery coke, brown coal, the coke, preferentially selects local superior resources for use.
3. according to the preparation method of claim 1,2 said a kind of novel high-quality particulate microalloy iron powders; It is characterized in that the mixing briquetting: become ingot at fully automatic hydroform machine briquetting behind the abundant mixing of will preparing burden; This is the significant improvement to traditional powder tinning, and compact density can be at 1.4～2.6g/cm
3Adjustment arbitrarily, preparation alloy iron powder is transferred to 2.2～2.6g/cm
3, not only improve production capacity, reduce discharging, can also improve the quality of reduced iron powder.
4. according to the preparation method of the said a kind of novel high-quality particulate microalloy iron powder of claim 1～3; It is characterized in that charging, reduction: briquetting is feeded; In tunnel, be heated to 1000～1050 ℃ and be incubated 5～60h then, reduce, obtain reducing ingot.Wherein said charge cask can adopt conventional containers; Like silit, stainless steel vessel etc.; Consider heat transfer, resistance to elevated temperatures and the cost performance of container, preferentially select the heating resisting metal jar for use, recommend to adopt the gradient refractory alloy cylinder of steel of contriver and units concerned's cooperation independent research; When wherein said tunnel reduces, can pass through the control catalyst consumption, can guarantee that the temperature of reduction process drops to 1050 ℃, low-temperature reduction can be realized the miniaturization of metallic iron grain size number, helps improving the performance index of alloy iron powder; Simultaneously, because the reduction of reduction temperature, the reductive material is very easily broken, and prolong the work-ing life of mechanize delivery device greatly.
5. according to the preparation method of the said a kind of novel high-quality particulate microalloy iron powder of claim 1～4, it is characterized in that the mill choosing separates: the reduction ingot of output is broken, levigate, magnetic separation separation obtains reduced iron powder and rich vanadium titanium material; Wherein said levigate, three sections open circuits of magnetic separation employing wet type stage grinding staged magnetic separations; Adopt long tube ball mill when levigate, grinding media is the steel ball of 8～20mm, and the downstream-type magnetic separator is adopted in magnetic separation, and mill is elected to be industry and adopts the choosing of open circuit gravity flow mill.Wherein said levigate processing parameter with magnetic separation is selected, and is then according to the purposes and the quality standard of required alloy iron powder, definite through testing.
6. according to the preparation method of the said a kind of novel high-quality particulate microalloy iron powder of claim 1～5; It is characterized in that smart reduction: with a reduced iron powder of output; Sending into reducing medium is in the fine reduction furnace of hydrogen or cracked ammonium gas; 800～850 ℃ of reduction temperatures, 30～60 minutes recovery times, output secondary reduction iron powder; The water cut of a wherein said reduced iron powder requires control below 5～10%.
7. according to the preparation method of the said a kind of novel high-quality particulate microalloy iron powder of claim 1～6; It is characterized in that classification: with the secondary reduction iron powder of output through pulverize, classification; Obtain granularity-200 order 85～95%, TFe grade 98.5～99.5%, solid solution has the high-quality particulate microalloy iron powder of trace V, Ti, Co, Ni.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102570246A CN102827985A (en) | 2012-07-24 | 2012-07-24 | Method for preparing novel excellent fine granule trace alloy iron powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102570246A CN102827985A (en) | 2012-07-24 | 2012-07-24 | Method for preparing novel excellent fine granule trace alloy iron powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102827985A true CN102827985A (en) | 2012-12-19 |
Family
ID=47331292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102570246A Pending CN102827985A (en) | 2012-07-24 | 2012-07-24 | Method for preparing novel excellent fine granule trace alloy iron powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102827985A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433496A (en) * | 2013-06-25 | 2013-12-11 | 吉林省华兴粉末冶金科技有限公司 | Preparation system of iron powder for powder metallurgy |
| CN105772706A (en) * | 2016-04-19 | 2016-07-20 | 玉溪大红山矿业有限公司 | Method for preparing qualified microalloy iron powder through high-carbon and high-hydrogen loss one-time-reduction iron powder |
| CN105880584A (en) * | 2016-04-19 | 2016-08-24 | 玉溪大红山矿业有限公司 | Method for preparing qualified microalloy iron powder through high-hydrogen-loss high-carbon primary reduced iron powder |
| CN106399615A (en) * | 2016-05-03 | 2017-02-15 | 玉溪大红山矿业有限公司 | Catalytic reduction furnace for producing low-strength sponge iron |
| CN106399614A (en) * | 2016-05-03 | 2017-02-15 | 玉溪大红山矿业有限公司 | Production method of low-strength reduced iron |
| CN108004366A (en) * | 2017-11-29 | 2018-05-08 | 朝阳金河粉末冶金材料有限公司 | A kind of method that PRODUCTION OF IRON POWDER wear-resistant medium is prepared using vanadium-titanium magnetite reduction magnetic separation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065226A (en) * | 1991-03-23 | 1992-10-14 | 冶金工业部长沙矿冶研究院 | Method for preparing microalloy iron powder by reduction grinding and selecting method |
| CN101418370A (en) * | 2008-11-21 | 2009-04-29 | 长沙市岳麓区东新科技开发有限公司 | Novel industrialization method for comprehensive utilization of vanadium ferrotitanium ore concentrate |
| CN102407327A (en) * | 2011-11-03 | 2012-04-11 | 攀枝花昆钢矿业有限公司 | Method for second reduction and decarbonization of first reduced iron powder |
| CN102433436A (en) * | 2011-11-18 | 2012-05-02 | 攀枝花昆钢矿业有限公司 | Method for separating iron and vanadium and titanium from vanadium titano-magnetite |
-
2012
- 2012-07-24 CN CN2012102570246A patent/CN102827985A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065226A (en) * | 1991-03-23 | 1992-10-14 | 冶金工业部长沙矿冶研究院 | Method for preparing microalloy iron powder by reduction grinding and selecting method |
| CN101418370A (en) * | 2008-11-21 | 2009-04-29 | 长沙市岳麓区东新科技开发有限公司 | Novel industrialization method for comprehensive utilization of vanadium ferrotitanium ore concentrate |
| CN102407327A (en) * | 2011-11-03 | 2012-04-11 | 攀枝花昆钢矿业有限公司 | Method for second reduction and decarbonization of first reduced iron powder |
| CN102433436A (en) * | 2011-11-18 | 2012-05-02 | 攀枝花昆钢矿业有限公司 | Method for separating iron and vanadium and titanium from vanadium titano-magnetite |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103433496A (en) * | 2013-06-25 | 2013-12-11 | 吉林省华兴粉末冶金科技有限公司 | Preparation system of iron powder for powder metallurgy |
| CN105772706A (en) * | 2016-04-19 | 2016-07-20 | 玉溪大红山矿业有限公司 | Method for preparing qualified microalloy iron powder through high-carbon and high-hydrogen loss one-time-reduction iron powder |
| CN105880584A (en) * | 2016-04-19 | 2016-08-24 | 玉溪大红山矿业有限公司 | Method for preparing qualified microalloy iron powder through high-hydrogen-loss high-carbon primary reduced iron powder |
| CN105772706B (en) * | 2016-04-19 | 2018-01-16 | 玉溪大红山矿业有限公司 | The method that qualified micro alloy iron powder is produced with a reduced iron powder of the high hydrogen loss of high-carbon |
| CN105880584B (en) * | 2016-04-19 | 2018-08-17 | 玉溪大红山矿业有限公司 | The method for producing qualified micro alloy iron powder with a reduced iron powder of high hydrogen loss high-carbon |
| CN106399615A (en) * | 2016-05-03 | 2017-02-15 | 玉溪大红山矿业有限公司 | Catalytic reduction furnace for producing low-strength sponge iron |
| CN106399614A (en) * | 2016-05-03 | 2017-02-15 | 玉溪大红山矿业有限公司 | Production method of low-strength reduced iron |
| CN108004366A (en) * | 2017-11-29 | 2018-05-08 | 朝阳金河粉末冶金材料有限公司 | A kind of method that PRODUCTION OF IRON POWDER wear-resistant medium is prepared using vanadium-titanium magnetite reduction magnetic separation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102433436B (en) | Method for separating iron and vanadium and titanium from vanadium titano-magnetite | |
| CN101418370B (en) | Novel industrialization method for comprehensive utilization of vanadium ferrotitanium ore concentrate | |
| CN102827985A (en) | Method for preparing novel excellent fine granule trace alloy iron powder | |
| CN108504855B (en) | Method for producing iron ore concentrate by using siderite as reducing agent through suspension magnetization roasting | |
| CN104087753B (en) | A kind of lateritic nickel ore self catalyzed reduction produces the method for nickelic grade ferronickel powder | |
| CN105132670B (en) | Classifying suspension roasting device for complex refractory iron ore | |
| Yu et al. | Effect of coal type on the reduction and magnetic separation of a high-phosphorus oolitic hematite ore | |
| CN103757200B (en) | Method for separating and enriching ferronickel from laterite-nickel ore | |
| CN105772216A (en) | Novel method for producing iron concentrates through complex refractory iron ore | |
| CN101418389B (en) | Method for directly reducing grain nickel iron in rotary kiln by using laterite nickle mine | |
| CN105478232B (en) | A kind of beneficiation method from graphite mould navajoite enrichment vanadic anhydride | |
| CN101586188B (en) | Two-stage roasting mineral smelting integrated technique of laterite | |
| CN103233114A (en) | Method for producing nickel/ferrum from nickel laterite ores | |
| CN103060564A (en) | Novel process for preparing acid-soluble titanium-rich material and iron powder by using tunnel kiln reduction selective grinding method | |
| CN102181643A (en) | Method for extracting rare earth from rare earth tailings | |
| CN101967571B (en) | Method for using red-soil nickel ore to produce nickel-iron alloy in tunnel kiln-electric furnace | |
| CN102994738A (en) | Method for preparing niobium-enriched ore by employing X-fluorescence sorting-microwave carbon thermal reduction | |
| CN101157977A (en) | Concentration method for iron and boron in low-grade paigeite | |
| 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 | |
| CN101418388B (en) | Process for producing nickel iron in rotary kiln-blast furnace by using laterite nickle mine | |
| CN1065226A (en) | Method for preparing microalloy iron powder by reduction grinding and selecting method | |
| CN103740933A (en) | Method for producing ferro-nickel alloy from nickel oxide material | |
| CN101954487A (en) | Vanadium-titanium-iron polymetallic ore preparation method by direct reduction of coal derived and application thereof | |
| CN102453824B (en) | Method for producing nickel-iron alloy by using laterite nickel mine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121219 |