CN103643041B - Novel technology for preparing low vanadium-titanium alloy comminuted steel shot through vanadium and titanium iron concentrate - Google Patents
Novel technology for preparing low vanadium-titanium alloy comminuted steel shot through vanadium and titanium iron concentrate Download PDFInfo
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- CN103643041B CN103643041B CN201310710418.7A CN201310710418A CN103643041B CN 103643041 B CN103643041 B CN 103643041B CN 201310710418 A CN201310710418 A CN 201310710418A CN 103643041 B CN103643041 B CN 103643041B
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Abstract
The invention relates to the technical field of comprehensive utilization of mineral resources and metallurgy, and in particular relates to a method for preparing low vanadium-titanium alloy comminuted steel shot through vanadium and titanium iron concentrate. According to the technical scheme, the method comprises the following steps: reducing vanadium and titanium iron concentrate at 1,200+/30 DEG C by using nontoxic, smell-less and non-corrosive sodium humate as a novel catalyst; carrying out wet-process grinding and selecting on the reduced materials to obtain primary reduced iron powder containing vanadium and titanium; and then refining and reducing for the second time to obtain the low vanadium-titanium alloy comminuted steel shot which has high cost performance and contains 0.3 to 0.4% of V and 0.4 to 0.97% of Ti.
Description
Technical field
The present invention relates to mineral resources comprehensive utilization and metallurgical technology field, be specifically related to sefstromite concentrate and prepare low V-Ti comminuted steel shot new technology.
Background technology
The method preparing low alloyed steel powder that existing disclosed patent and reported in literature describe is four large classes substantially, i.e. element powder mix method, part pre-alloying powder metallurgy, pre-alloying powder metallurgy and coated composite powder, on the basis that these methods are all the metal powder that carries out elementary processing with multiple or parent powder is base, made by a series of complete processing, take mineral products as raw material, the technology directly being prepared low alloyed steel powder by a technical process, have no any disclosure.
Inventor herein, the method preparing novel excellent fine granule trace alloy iron powder from sefstromite concentrate is proposed in 201210257024.6 patents, although the high-quality iron powder of its to be a kind of solid solution have trace element such as Co, Ni, V, Ti, to prepare low alloyed steel powder, also need to add metal-powder amount, just can reach the component requirements of low alloyed steel powder.Patent 200510022195.0 proposes a kind of method of pig iron containing vanadium or the direct melting vanadium alloy of sponge iron or V-Ti steel, but obtain the low V-Ti comminuted steel shot proposed with this patent, also need in spraying gun, alloy molten steel to be carried out break process with high pressure water or gas.
Since microalloy iron powder can be prepared from sefstromite concentrate, can directly prepare low alloyed steel powder? 201210580477.2 " tunnel kiln reduction mill selects legal system for acid-soluble rich titanium material and iron powder novel process " being subject to inventor herein's proposition adopt the inspiration of new catalyst L, if be applied to the process of sefstromite concentrate, what effect can be obtained? through systematic testing, disclose in sefstromite concentrate reduction process, only add new catalyst L, not only there is excellent catalysis, and there is the unique technology effect of the low V-Ti comminuted steel shot of preparation that this patent is carried.
New catalyst L does not disclose its component in 201210580477.2, declares and answer the requirement of auditor's first time examination reports at this patent, and simultaneously formally open, its component is Sodium salts humic acids.
Sodium salts humic acids is as flotation reagent, additive, cakingagent is applied to metallurgical technology field and has many reports, as in process for direct reduction of briquets bound with high molecular substances patent (CN85103346A), disclose as preventing ring formation problem in rotary kiln reduction process, develop the technology that Sodium salts humic acids uses as iron ore pellet binder, but use as catalyzer, or first time, be applied to as core technology that from sefstromite concentrate, directly to prepare low alloyed steel powder be also first time, particularly China's vanadium titano-magnetite is extremely abundant, can say it is inexhaustible, by the enforcement of this patent, be expected to develop into the series product of the Ti low alloyed comminuted steel shot of the vanadium with Mineral Resources in China characteristic and sintered metal product thereof.
The molecular formula of Sodium salts humic acids is C
9h
8na
2o
4, nontoxic odorless is corrosion-free, very easily water-soluble.System adopts the natural low magnesium weathered coal of the low calcium of high-quality containing humic acids to refine through chemistry and forms, and it is a kind of multi-functional natural organic high-molecular compound, containing hydroxyl, and quinonyl, the active group that carboxyl etc. are more, has very large internal surface area, has stronger absorption, exchange, complexing, sequestering power.Sodium salts humic acids has been applied in the various fields of national economy and has approved.Especially as ceramic additive, dispergator, drilling mud adjusting agent, process water stablizer, cement water reducing agent, boiler detergent, ore floatation agent, waste gas waste water conditioner, water coal oar admixture, coal briquette bond, negative battery plate expander etc., demonstrate powerful vitality.Secondly, as compound manure in agricultural, can Soil structure be changed, farm crop be played to the effect of disease resistance increasing both production and income.As fodder additives in livestock culture, as synergistic agent in aquaculture.Pharmaceutically can make balneation medicament etc.In the application of mineral resources comprehensive utilization and metallurgical technology field, much potential function is also had not yet to develop, 201210257024.6 functions developing a kind of low-temperature reduction titanium wherein and iron, this patent then on this basis, excavates again a kind of new unique function.
Summary of the invention
Technical problem to be solved by this invention directly prepares low V-Ti comminuted steel shot new technology from sefstromite concentrate.
The technical solution used in the present invention is: with the free from corrosion Sodium salts humic acids of nontoxic odorless as new catalyst, by sefstromite concentrate 100 parts, Sodium salts humic acids 1.5 ~ 5 parts, 15 ~ 28 parts, hard coal batching, mixing, briquetting or granulation, tinning enters imitative tunnel furnace in 1200 DEG C ± 30 DEG C reduction, reducing material is after the choosing of wet type mill, obtain a reduced iron powder containing vanadium, titanium, again after secondary reduction, directly make containing the high low V-Ti comminuted steel shot of the cost performance of Fe > 98%, V 0.3 ~ 0.4%, Ti 0.4 ~ 0.97%, C 0.2 ~ 0.4%.Specifically comprise following implementation step:.
A, batching: by weight ratio by 100 parts, ore deposit, catalyzer Sodium salts humic acids 1.5 ~ 5 parts and solid reductant 15 ~ 25 parts mixing;
B, charging, reduction: mixture briquetting (or pelletizing) tinning in a step after mixing or directly tinning, then Heating temperature to 1200 DEG C ± 30 DEG C be incubated 5h in imitative tunnel furnace, obtains reducing ingot;
C, mill choosing are separated: b step gained reduction ingot is broken, levigate, low intensity magnetic separation is separated, and obtains rich vanadium titanium material and a reduced iron powder;
D, secondary reduction: a reduced iron powder hydrogen (or cracked ammonium) of step c gained carries out secondary reduction as reducing medium, obtains low V-Ti comminuted steel shot.
Wherein, outside described sefstromite concentrate, be also applicable to other many metallic irons concentrate process;
Wherein, the solid reductant that the solid reductant described in a step can be commonly used for metallurgy industry, as: at least one in hard coal, broken Jiao, refinery coke, brown coal, coke;
Wherein, tinning container described in b step, can select outside conventional silicon carbide tank, consider heat transfer property and the resistance to elevated temperatures of container, heating resisting metal tank also can be adopted to feed; .
Wherein, levigate described in step c, magnetic separation adopts wet grinding low intensity magnetic separation, and mill is elected to be industry and adopts the choosing of open circuit gravity flow mill;
The Powdered Alloy Steel that the present invention obtains is containing V 0.3 ~ 0.4%, containing Ti 0.4 ~ 0.97%, containing C 0.2 ~ 0.4%, TFe > 98%.
The present invention compared with prior art, has following technique effect:
1, the present invention is separated the new catalyst of ferrotitanium vanadium using Sodium salts humic acids as sefstromite concentrate reduction grinding, compared with sodium-chlor, sodium sulfate, sodium carbonate etc., have that consumption is few, ferrotitanium vanadium good separating effect, and in sefstromite concentrate 50 ~ 60% vanadium enter the unique function of a reduced iron powder, create prerequisite for follow-up secondary reduction obtains low V-Ti comminuted steel shot.
2, the present invention take sefstromite concentrate as raw material, in the technical process of effective separation of iron, titanium, vanadium, directly prepares low V-Ti comminuted steel shot, through system development, is expected to the series product of formation one class novel alloy comminuted steel shot.
Accompanying drawing explanation
Fig. 1 is the process flow sheet that sefstromite concentrate of the present invention prepares low V-Ti comminuted steel shot new technology.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is further described, does not therefore limit the present invention among described scope of embodiments.Sefstromite concentrate multielement analysis the results are shown in Table 1.
Embodiment 1 adopts the inventive method separation of iron and titanium vanadium from sefstromite concentrate
By sefstromite concentrate 100 parts, with Sodium salts humic acids 1.5 parts and solid reductant 15 parts of mixing briquettings, then load reductive jar, Heating temperature to 1200 DEG C in imitative tunnel furnace is also incubated 5h, obtains reducing material; Through fragmentation, be milled down to-200 orders 65%, magnetic separation obtains rough concentrate and mine tailing, and coarse concentrate regrinding carefully arrives-200 orders 70%, and magnetic separation obtains concentrate and chats, and mine tailing and chats are mixed into rich vanadium titanium material.The separating resulting of gained sponge iron and rich vanadium titanium material is as shown in table 2: in a reduced iron powder, TFe content is 89.41%, iron recovery 88.46%; After secondary reduction, it the results are shown in Table shown in 7.
Embodiment 2 adopts the inventive method separation of iron and titanium vanadium from sefstromite concentrate
By sefstromite concentrate 100 parts, with Sodium salts humic acids 3 parts and solid reductant 15 parts of mixing briquettings, then load reductive jar, Heating temperature to 1200 DEG C in imitative tunnel furnace is also incubated 5h, obtains reducing material; Through fragmentation, be milled down to-200 orders 65%, magnetic separation obtains rough concentrate and mine tailing, and coarse concentrate regrinding carefully arrives-200 orders 70%, and magnetic separation obtains concentrate and chats, and mine tailing and chats are mixed into rich vanadium titanium material.The separating resulting of gained sponge iron and rich vanadium titanium material is as shown in table 3: in a reduced iron powder, TFe content is 92.49%, iron recovery 87.39%; After secondary reduction, it the results are shown in Table shown in 7.
Embodiment 3 adopts the inventive method separation of iron and titanium vanadium from sefstromite concentrate
By sefstromite concentrate 100 parts, with Sodium salts humic acids 5 parts and solid reductant 15 parts of mixing briquettings, then load reductive jar, Heating temperature to 1200 DEG C in imitative tunnel furnace is also incubated 5h, obtains reducing material; Through fragmentation, be milled down to-200 orders 65%, magnetic separation obtains rough concentrate and mine tailing, and coarse concentrate regrinding carefully arrives-200 orders 70%, and magnetic separation obtains concentrate and chats, and mine tailing and chats are mixed into rich vanadium titanium material.The separating resulting of gained sponge iron and rich vanadium titanium material is as shown in table 4: in a reduced iron powder, TFe content is 92.44%, iron recovery 85.71%; After secondary reduction, it the results are shown in Table shown in 7.
Embodiment 4 adopts the inventive method separation of iron and titanium vanadium from sefstromite concentrate
By sefstromite concentrate 100 parts, with Sodium salts humic acids 5 parts and solid reductant 18 parts of mixing briquettings, then load reductive jar, Heating temperature to 1200 DEG C in imitative tunnel furnace is also incubated 5h, obtains reducing material; Through fragmentation, be milled down to-200 orders 65%, magnetic separation obtains rough concentrate and mine tailing, and coarse concentrate regrinding carefully arrives-200 orders 70%, and magnetic separation obtains concentrate and chats, and mine tailing and chats are mixed into rich vanadium titanium material.The separating resulting of gained sponge iron and rich vanadium titanium material is as shown in table 5: in a reduced iron powder, TFe content is 92.65%, iron recovery 85.32%; After secondary reduction, it the results are shown in Table shown in 7.
Embodiment 5 adopts the inventive method separation of iron and titanium vanadium from sefstromite concentrate
By sefstromite concentrate 100 parts, with Sodium salts humic acids 5 parts and solid reductant 28 parts of mixing briquettings, then load reductive jar, Heating temperature to 1200 DEG C in imitative tunnel furnace is also incubated 5h, obtains reducing material; Through fragmentation, be milled down to-200 orders 65%, magnetic separation obtains rough concentrate and mine tailing, and coarse concentrate regrinding carefully arrives-200 orders 70%, and magnetic separation obtains concentrate and chats, and mine tailing and chats are mixed into rich vanadium titanium material.The separating resulting of gained sponge iron and rich vanadium titanium material is as shown in table 6: in a reduced iron powder, TFe content is 92.97%, iron recovery 88.30%; After secondary reduction, it the results are shown in Table shown in 7.
Table 1 sefstromite concentrate multielement analysis result (%).
| TFe | TiO 2 | V 2O 5 | SiO 2 | Al 2O 3 | CaO | MgO | Cu | Co | Ni |
| 57.53 | 8.69 | 0.65 | 4.04 | 4.66 | 1.19 | 1.88 | 0.0045 | 0.016 | 0.014 |
Table 2 embodiment 1 sefstromite concentrate reduction-mill selects separating resulting.
Table 3 embodiment 2 sefstromite concentrate reduction-mill selects separating resulting.
Table 4 embodiment 3 sefstromite concentrate reduction-mill selects separating resulting.
Table 5 embodiment 4 sefstromite concentrate reduction-mill selects separating resulting.
Table 6 embodiment 5 sefstromite concentrate reduction-mill selects separating resulting.
Table 7 secondary reduction gained Powdered Alloy Steel multielement analysis result (%)
| Powdered Alloy Steel composition | Fe | Ti | V | C | Co | Ni |
| Embodiment 1 | 98.32 | 0.74 | 0.36 | 0.32 | 0.025 | 0.026 |
| Embodiment 2 | 98.25 | 0.87 | 0.42 | 0.26 | 0.024 | 0.026 |
| Embodiment 3 | 98.36 | 0.73 | 0.36 | 0.39 | 0.025 | 0.026 |
| Embodiment 4 | 98.19 | 0.97 | 0.30 | 0.40 | 0.025 | 0.026 |
| Embodiment 5 | 98.68 | 0.41 | 0.41 | 0.35 | 0.025 | 0.026 |
Claims (1)
1. a sefstromite concentrate prepares the method for low V-Ti comminuted steel shot, it is characterized in that adopting the free from corrosion Sodium salts humic acids of nontoxic odorless as catalyzer, by sefstromite concentrate 100 parts, Sodium salts humic acids 1.5 ~ 5 parts, 15 ~ 28 parts, hard coal batching, mixing, briquetting, tinning enters imitative tunnel furnace in 1200 DEG C ± 30 DEG C reduction, reducing material is after the choosing of wet type mill, obtain containing vanadium, a reduced iron powder of titanium, wherein in sefstromite concentrate, the vanadium of 50 ~ 60% enters reduced iron powder, again after secondary reduction, directly make containing Fe > 98%, V 0.3 ~ 0.4%, Ti 0.4 ~ 0.97%, the low V-Ti comminuted steel shot of C 0.2 ~ 0.4%.
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| CN105349783A (en) * | 2015-11-01 | 2016-02-24 | 长沙市东新矿冶科技开发有限公司 | Method for preparing acid-soluble titanium-rich material and iron powder from titanium concentrate |
| CN110656237A (en) * | 2018-08-20 | 2020-01-07 | 朝阳金工钒钛科技有限公司 | Process for directly extracting vanadium by using vanadium-titanium magnetite tunnel kiln |
| CN109332711A (en) * | 2018-10-29 | 2019-02-15 | 攀枝花市银江金勇工贸有限责任公司 | A kind of vanadium ferrotianium powder producing method |
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| CN1038432C (en) * | 1995-07-21 | 1998-05-20 | 宝山钢铁(集团)公司 | Method of production for direct reduction furnace charge by cold-consolidation briquetting method |
| CN1085737C (en) * | 1999-08-10 | 2002-05-29 | 中南工业大学 | Process for preparing Ti-enriched material from ilmenite concentrate |
| CN1319684C (en) * | 2005-04-25 | 2007-06-06 | 昆明理工大学 | Method for preparing natural micro alloy iron powder from vanadium-titanium-iron headings by microwave radiation |
| CN1718780A (en) * | 2005-08-03 | 2006-01-11 | 苏亚杰 | Carbon containing cold consolidation iron pelletizing ore having coal self cohesiveness |
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| CN101418370B (en) * | 2008-11-21 | 2012-05-02 | 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 |
| CN101717854B (en) * | 2009-12-25 | 2012-06-27 | 重庆瑞帆再生资源开发有限公司 | Method for producing metallized pellet by using metallurgical roasting furnace |
| CN102534086B (en) * | 2011-12-20 | 2013-07-17 | 沈阳博联特熔融还原科技有限公司 | Method for preparing high-grade metallic iron and titanium-rich slag with titanium concentrate as raw material |
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