CN101565768A - Method for producing ferrous powder and co-production titanium slag by rapidly reducing titanium placer pellets by rotary hearth furnace - Google Patents
Method for producing ferrous powder and co-production titanium slag by rapidly reducing titanium placer pellets by rotary hearth furnace Download PDFInfo
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- CN101565768A CN101565768A CNA2009100944661A CN200910094466A CN101565768A CN 101565768 A CN101565768 A CN 101565768A CN A2009100944661 A CNA2009100944661 A CN A2009100944661A CN 200910094466 A CN200910094466 A CN 200910094466A CN 101565768 A CN101565768 A CN 101565768A
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Abstract
The invention discloses a method for producing ferrous powder and co-production titanium slag by rapidly reducing titanium placer pellets by a rotary hearth furnace, which comprises the following steps of: thinning titanium placer which is then added with a certain proportions of carbonaceous reducing agent, adhesive and concentrate ore and evenly mixing the materials; making pellets with the diameter of 10-40mm by a pellet forming machine; drying the pellets for 4-6 hours at the temperature of 200-500 DEG C and rapidly reducing the pellets in the rotary hearth furnace with the reducing temperature of 1200-1350 DEG C and the reducing time of 20-120min; crashing the pellets after being reduced; and then carrying out ball milling to the crashed pellets according to the grinding ore concentration of 50-80 percent, the ball milling time of 0.5-1.5h and the grinding ore fineness of 80-90 percent of -200 meshes; and after ball milling, carrying out magnetic separation and reelecting to obtain concentrate ore ferrous powder and tailing titanium slag, wherein the magnetic separation strength is 1000-4000 gausses. The invention adopts a method for rapidly reducing titanium placer pellets at the high temperature by the rotary hearth furnace, not only has even furnace temperature field, but also can quicken the reducing reaction speed, shorten the reducing time, improve the reducing efficiency and control the reducing temperature and atmosphere simultaneously.
Description
Technical field
The present invention relates to a kind of Yunnan titanium placer treatment method with comprehensive utilization, particularly a kind of method of extracting iron, titanium from the titanium placer of Yunnan belongs to field of metallurgy.
Background technology
China is titanium resource big country, and reserves account for more than 60% of world saving, but the v-ti magnetite mineral intergrowth has accounted for dominant position.Titanium ore is that deironing in Yunnan Province's black resource, manganese occupy tertiary important mineral outward, be distributed in mainly that high post is advised, area such as stone screen of the Menhai in Wuding County, rich people, Lufeng, Baoshan slab bridge, Xishuangbanna and the southern regions of the Yunnan Province, Jian Shui, Huaning, Mengzi, Funing is the ilmenite based on placer, mineral assemblage tube list, separation performance is good.Ilmenite concentrate calcium magnesium addition is low to be the high quality raw material of producing titanium sponge.Medium-sized or above mineral deposit is estimated to belong to through geological work in menakanite mineral deposit, Lufeng, Yunnan.In addition, without the exploration of geology department,, the peasant has more than 20 at least but carrying out the ore deposit point of local method exploitation.Estimate that according to the expert these Privately operated mines point majorities are to have the menakanite mineral deposit that commercial mining is worth,, will obtain considerable industrial reserves as long as through geological prospecting.
There is abundant titanium resource in Yunnan Province, and explored ferrotianium mineral deposit has 30, wherein 15 of large ore deposits, 5 in medium-sized mineral deposit, 10 in small-sized mineral deposit.About 5561 * the 104t of ilmenite reserves that verifies.Because geology department is lower to the degree of prospecting of Yunnan titanium resource in the past, any geological work is not made in many ferrotianiums mineral deposit.In fact, the reserves of Yunnan Province's ilmenite will be much larger than above-mentioned numeral.Yet, with the titanium resource advantage contrast but be extremely inharmonic present situation of utilizing greatly.The exploitation degree of the present titanium resource in Yunnan Province is very low, mainly based on production primary products ilmenite concentrate.The overwhelming majority of ilmenite concentrate manufacturing enterprise is an individual and private business small business, because the selecting and purchasing state of the art is low, the equipment and the mode of production fall behind, and level of management are low, thereby resource utilization is low, and resources advantage still fails to be converted into economic advantages.
At present, mainly be that to adopt chlorination process be that the lixiviation process of main body and the caustic soda factory by-product hydrochloric acid that matches is with it produced ilmenite concentrate to the processing of the titanium placer in Yunnan, such method acid consumption is greatly, and cause serious environmental to pollute, administer costlyly, the production cycle is long, the production cost height; Yunnan Province's titanium white production ability is extremely low, and respectively there is a tame titanium powder plant in the whole province only Wuding county and Fumin County, all adopts Production By Sulfuric Acid Process anatase thpe white powder product specification lower; Yunnan Province's titanium placer mineralogical property is simple, belongs to free-milling ore, and general ore-dressing technique is: multistage washing-gravity treatment-magnetic dressing process, but so simple ore dressing mode has caused yield low, ilmenite recovery rate in ore-dressing only about 50%, the wasting of resources is extremely serious, causes the present situation of the rapid dilution of resource; Adopt common ore-smelting furnace to produce titanium slag in the metallurgical method, but, cause electrosmelting factory in the face of huge pressure because there is the energy consumption height in electrosmelting, pollutes shortcomings such as big.
Summary of the invention
The present invention is intended to overcome the defective that above-mentioned technology exists, and a kind of method of producing iron powder and coproduction titanium slag with rotary hearth furnace rapid reduction of carbonaceous titanium placer pellets is provided.That this method has is simple to operate, the reduction temperature field evenly, the production time is short, the reaction times is fast, the high titanium of production efficiency and iron yield height, cost are low, the easy characteristics such as control automatically of temperature and reducing atmosphere.In addition, the required in process of production energy consumption of present technique 90% is provided by coal, only needs a spot of electric power to use as power.
The present invention finishes according to the following steps: titanium placer is through broken thin (size range-120+200 order), add a certain proportion of carbonaceous reducing agent (carbonaceous reducing agent proportioning be ore deposit 7～25%), (cakingagent is a carboxymethyl cellulose to cakingagent, consumption be ore deposit amount 0.01～3%) with titanium placer mixing (mixing equipment mixer), (the pelletizing diameter is 10～40mm) to become pelletizing with shaping mechanism, dry, place rotary hearth furnace to carry out fast restore (reductive condition: 1200～1350 ℃ of reduction temperatures, recovery time 20～120min), after the reduction, carry out fragmentation (granularity is-the 120+200 order), (ore milling concentration is 50～80% by ore grinding concentration then, grinding fineness accounts for 80～90% for-200 orders) carry out wet ball grinding 0.5-1.5h, carry out magnetic separation and gravity treatment (condition: magnetic separation strength 1000～4000 Gausses), just obtain high-grade iron powder (iron content 90～95%), can be used as steelmaking feed.The mine tailing that magnetic separation and gravity treatment obtain, it contains titanium dioxide 50～70%, can be used as the raw material of vanadium extraction and titanium.
At described cakingagent is carboxymethyl cellulose, adds raw ore weight 0.01～3%.Described wet ball grinding is a pulp density 50～80%, ball milling time 0.5～1.5h.The iron powder that described magnetic separation and gravity treatment obtain can be used as use as steelmaking material, and magnetic separation and gravity treatment obtain mine tailing as the raw material of carrying titanium.The described rotary hearth furnace reduction time is 20～120min.The present invention and traditional rotary kiln, shaft furnace, tunnel kiln reduction are relatively, the present invention has temperature and the atmosphere controllability is strong, reduction temperature is high, the temperature field is even, speed of reaction is fast, the recovery time is short, reduction efficiency is high, iron and titanium yield height, low cost and other advantages, avoided with rotary kiln reduction process ring formation the defective of long, the high existence of energy consumption of tunnel furnace, shaft furnace and rotary kiln recovery time.The present invention only need add the titanium placer of reductive agent, cakingagent and fragmentation through briquetting, drying, rotary hearth furnace reduction, fragmentation and wet ball grinding, through magnetic separation and gravity treatment, obtains iron powder and mine tailing, realizes that iron separates with titanium.Owing to adopt wet ball grinding, metallic iron and gangue are dissociated, through magnetic separation and gravity treatment operation, can obtain high iron powder of iron content and the high mine tailing of titaniferous, realized that iron effectively separates with titanium, abandon direct reduction-electric furnace and existed titanium to disperse serious problem molten the branch.Therefore, the present invention provides a kind of new method for handling sefstromite concentrate, realizes that environmental benefit, social benefit and economic benefit three are unified, has the potential prospects for commercial application.The present invention adopts rotary hearth furnace fast restore titanium placer pellets at high temperature, and not only temperature field in furnace is even, and can accelerate reduction reaction rate, shortens the recovery time, improves reduction efficiency, and reduction temperature and atmosphere are all controlled simultaneously.The required in process of production a large amount of energy consumptions of this technology are provided by coal, only need a spot of electric power as power usefulness, and can be mass-produced.In addition, because this process using rotary hearth furnace fast restore titanium placer pellets, the metallized pellet that obtains adopts magnetic separation, gravity treatment operation to isolate a large amount of iron through fragmentation and wet ball grinding, and it is high and bessemerize molten iron and put forward defectives such as the titanium yield is low to have abandoned the electrosmelting cost.Therefore, present method is handled titanium placer, has titanium, the iron yield is higher, production cost is lower, utilization of resources advantages of higher, for a feasible new way has been opened up in the comprehensive utilization of titanium placer.
Description of drawings
Fig. 1 is the process flow sheet of the invention process example.
Embodiment
The chemical ingredients of embodiment 1:1. titanium placer is as follows: TFe31.56～33.74%, TiO
245.47～46.83, SiO
22.31 Al～2.58%,
2O
32.36～2.64%, CaO1.24～1.40%, MgO2.37～2.55%.
2. processing condition: titanium placer 10000g is broken to be ground to-and the 120+200 order accounts for 80%, the carboxymethyl cellulose cakingagent and the titanium placer that add the carbon dust of raw ore weight 20% and add raw ore weight 1% carry out mixing, making diameter with ball egg shaper is 10 ~ 40mm pelletizing, at 250 ℃ of dry 4h, adopt the rotary hearth furnace fast restore, temperature is controlled at 1200 ℃, time 30min.After the reduction, carry out slightly broken (granularity is-the 120+200 order), carry out wet ball grinding then, pulp density 55%, ball milling time 1.5h, behind the ball milling, adopt 2500 Gausses' magnetic separator to carry out magnetic separation, the material that magnetic separation obtains adopts shaking table to carry out gravity treatment, just obtain high-grade iron powder, the mine tailing that magnetic separation and gravity treatment obtain is for can utilize titanium slag.The technico-economical comparison that is issued in these processing condition: the iron powder grade reaches 92.24%, and the iron direct yield reaches 82.5%, titanium grade 74.12% in the titanium slag, and the titanium yield reaches 88.87%.
The chemical ingredients of embodiment 2:1. sefstromite concentrate is as follows: TFe32.01～34.82%, TiO
245.31～46.14, SiO
22.12 Al～2.45%,
2O
32.02～2.49%, CaO1.14～1.58%, MgO2.67～2.89%.
2. processing condition: titanium placer 20000g is broken to be ground to-and the 120+200 order accounts for 80%, the carboxymethyl cellulose cakingagent and the titanium placer that add the carbon dust of raw ore weight 22% and add raw ore weight 2% carry out mixing, making diameter with ball egg shaper is 10～40mm pelletizing, at 250 ℃ of dry 4h, adopt the rotary hearth furnace fast restore, temperature is controlled at 1250 ℃, time 40min.After the reduction, carry out slightly broken (granularity is-the 120+200 order), carry out wet ball grinding then, pulp density 65%, ball milling time 1h, behind the ball milling, adopt 3000 Gausses' magnetic separator to carry out magnetic separation, the material that magnetic separation obtains adopts shaking table to carry out gravity treatment, just obtain high-grade iron powder, the mine tailing that magnetic separation and gravity treatment obtain is for can utilize titanium slag.The technico-economical comparison that is issued in these processing condition: the iron powder grade reaches 93.27%, and the iron direct yield reaches 82.33%, titanium grade 75.74% in the titanium slag, and the titanium yield reaches 90.96%.
The chemical ingredients of embodiment 3:1. sefstromite concentrate is as follows: TFe36.54～38.01%, TiO
245.39 SiO～47.94%,
22.71 Al～2.99%,
2O
32.64～2.97%, CaO1.54～1.77%, MgO2.64～2.98%.
2. processing condition: titanium placer 50000g is broken to be ground to-and the 120+200 order accounts for 80%, the carboxymethyl cellulose cakingagent and the titanium placer that add the carbon dust of raw ore weight 25% and add raw ore weight 3% carry out mixing, making diameter with ball egg shaper is 10～40mm pelletizing, at 250 ℃ of dry 4h, adopt the rotary hearth furnace fast restore, temperature is controlled at 1300 ℃, time 50min.After the reduction, carry out slightly broken (granularity is-the 120+200 order), carry out wet ball grinding then, pulp density 75%, ball milling time 1.5h, behind the ball milling, adopt 3500 Gausses' magnetic separator to carry out magnetic separation, the material that magnetic separation obtains adopts shaking table to carry out gravity treatment, just obtain high-grade iron powder, the mine tailing that magnetic separation and gravity treatment obtain is for can utilize titanium slag.The technico-economical comparison that is issued in these processing condition: the iron powder grade reaches 94.01%, and the iron direct yield reaches 84.4%, titanium grade 76.27% in the titanium slag, and the titanium yield reaches 92.47%.
Claims (6)
1, a kind of method of producing iron powder and coproduction titanium slag with rotary hearth furnace fast restore titanium placer pellets, it is characterized in that finishing according to the following steps: titanium sandy plain ore deposit is through broken thin, add carbonaceous reducing agent, cakingagent and titanium placer concentrate mixing, make the pelletizing that diameter is 10 ~ 40mm with ball egg shaper, dry, place rotary hearth furnace to carry out fast restore, the temperature of rotary hearth furnace reduction is controlled at 1250～1350 ℃, time 20 ~ 120min, after the reduction, carry out fragmentation, carry out wet ball grinding then, pulp density during wet ball grinding is 50 ~ 80%, ball milling time 0.5-1.5h carries out magnetic separation and gravity treatment again, obtains high-grade iron powder and available titanium slag.
2, the method for producing iron powder and coproduction titanium slag according to claims 1 described rotary hearth furnace fast restore titanium placer pellets is characterized in that described carbonaceous reducing agent is a carbon dust.
3, the method for producing iron powder and coproduction titanium slag according to the described rotary hearth furnace fast restore titanium placer pellets of claims 1 is characterized in that, described when carrying out magnetic separation and gravity treatment, magnetic separation strength is 1000 ~ 4000 Gausses, adopts shaking table to carry out gravity treatment.
4, the method for producing iron powder and coproduction titanium slag according to claims 1 described rotary hearth furnace fast restore titanium placer pellets is characterized in that the mine tailing that described gravity treatment obtains is available titanium slag.
5, the method for producing iron powder and coproduction titanium slag according to claims 1 described rotary hearth furnace fast restore titanium placer pellets is characterized in that described cakingagent is a carboxymethyl cellulose, and consumption is 0.01 ~ 3% of a breeze amount.
6, according to the described rotary hearth furnace fast restore titanium placer pellets of claims 1 produce iron powder and coproduction titanium slag and method, it is characterized in that described magnetic separation is adopted and scanned equipment is SLON type high gradient magnetic separator.
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| CN102352423A (en) * | 2011-10-20 | 2012-02-15 | 攀枝花慧泰金属新材料有限公司 | Method for selecting and smelting titanium from vanadium titanomagnetite at low temperature |
| CN102363218A (en) * | 2011-11-25 | 2012-02-29 | 北京君致清科技有限公司 | Method for producing copper-powder-containing iron by reducing copper-containing furnace cinders directly |
| CN102703714A (en) * | 2012-06-04 | 2012-10-03 | 红河锌联科技发展有限公司 | Method for preparing iron powder and recovering nonferrous metal from blast furnace iron making smoke dust |
| CN102839281A (en) * | 2012-09-13 | 2012-12-26 | 莱芜钢铁集团有限公司 | Method of producing titanium-bearing metallic pellets used for protecting blast furnace with rotary hearth furnace through direct reduction |
| CN104498710A (en) * | 2014-12-03 | 2015-04-08 | 金川集团股份有限公司 | Preparation method of iron powder balls |
| CN104611495A (en) * | 2014-06-27 | 2015-05-13 | 冯志权 | Method for preparation of titanium slag by tunnel kiln |
| WO2015081775A1 (en) * | 2013-12-05 | 2015-06-11 | 中国科学院过程工程研究所 | Method for comprehensively using high-chromium-content vanadium-titanium magnetite concentrate |
| CN105215368A (en) * | 2015-09-23 | 2016-01-06 | 安徽华钢冶金科技有限公司 | A kind of preparation method of reduced iron powder |
| CN105215369A (en) * | 2015-09-23 | 2016-01-06 | 安徽华钢冶金科技有限公司 | A kind of preparation method of iron-based containing titanium powder |
| CN105907957A (en) * | 2016-04-29 | 2016-08-31 | 昆明理工大学 | Method for preparing reduced ilmenite for welding electrodes by reducing marine placer through microwaves of rotary hearth furnace |
| CN106086478A (en) * | 2016-06-21 | 2016-11-09 | 昆明冶金研究院 | A kind of method utilizing Yunnan ilmenite concentrate to produce reduced iron powder coproduction rich-titanium material |
| CN107245630A (en) * | 2017-04-19 | 2017-10-13 | 广西盛隆冶金有限公司 | A kind of method that sea sand ore deposit and lateritic nickel ore grandidierite produce construction(al)steel |
| CN107245629A (en) * | 2017-04-19 | 2017-10-13 | 广西盛隆冶金有限公司 | A kind of sea sand ore deposit is matched somebody with somebody with lateritic nickel ore strengthens the preprocess method of alloy rigidity after ore deposit |
| CN111500812A (en) * | 2020-05-08 | 2020-08-07 | 张岩 | Method for separating vanadium, titanium and iron from vanadium-titanium magnetite concentrate |
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2009
- 2009-05-18 CN CNA2009100944661A patent/CN101565768A/en active Pending
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| CN102352423A (en) * | 2011-10-20 | 2012-02-15 | 攀枝花慧泰金属新材料有限公司 | Method for selecting and smelting titanium from vanadium titanomagnetite at low temperature |
| CN102363218B (en) * | 2011-11-25 | 2013-05-08 | 北京君致清科技有限公司 | Method for producing copper-powder-containing iron by reducing copper-containing furnace cinders directly |
| CN102363218A (en) * | 2011-11-25 | 2012-02-29 | 北京君致清科技有限公司 | Method for producing copper-powder-containing iron by reducing copper-containing furnace cinders directly |
| CN102703714A (en) * | 2012-06-04 | 2012-10-03 | 红河锌联科技发展有限公司 | Method for preparing iron powder and recovering nonferrous metal from blast furnace iron making smoke dust |
| CN102839281B (en) * | 2012-09-13 | 2015-08-05 | 莱芜钢铁集团有限公司 | Rotary hearth furnace direct-reduction is utilized to produce the method for blast furnace protecting titaniferous metallized pellet |
| CN102839281A (en) * | 2012-09-13 | 2012-12-26 | 莱芜钢铁集团有限公司 | Method of producing titanium-bearing metallic pellets used for protecting blast furnace with rotary hearth furnace through direct reduction |
| WO2015081775A1 (en) * | 2013-12-05 | 2015-06-11 | 中国科学院过程工程研究所 | Method for comprehensively using high-chromium-content vanadium-titanium magnetite concentrate |
| CN104611495A (en) * | 2014-06-27 | 2015-05-13 | 冯志权 | Method for preparation of titanium slag by tunnel kiln |
| CN104498710A (en) * | 2014-12-03 | 2015-04-08 | 金川集团股份有限公司 | Preparation method of iron powder balls |
| CN105215368A (en) * | 2015-09-23 | 2016-01-06 | 安徽华钢冶金科技有限公司 | A kind of preparation method of reduced iron powder |
| CN105215369A (en) * | 2015-09-23 | 2016-01-06 | 安徽华钢冶金科技有限公司 | A kind of preparation method of iron-based containing titanium powder |
| CN105907957A (en) * | 2016-04-29 | 2016-08-31 | 昆明理工大学 | Method for preparing reduced ilmenite for welding electrodes by reducing marine placer through microwaves of rotary hearth furnace |
| CN105907957B (en) * | 2016-04-29 | 2018-08-10 | 昆明理工大学 | A kind of method that rotary hearth furnace microwave reduction sea sand mine prepares welding rod reduced ilmenite |
| CN106086478A (en) * | 2016-06-21 | 2016-11-09 | 昆明冶金研究院 | A kind of method utilizing Yunnan ilmenite concentrate to produce reduced iron powder coproduction rich-titanium material |
| CN107245630A (en) * | 2017-04-19 | 2017-10-13 | 广西盛隆冶金有限公司 | A kind of method that sea sand ore deposit and lateritic nickel ore grandidierite produce construction(al)steel |
| CN107245629A (en) * | 2017-04-19 | 2017-10-13 | 广西盛隆冶金有限公司 | A kind of sea sand ore deposit is matched somebody with somebody with lateritic nickel ore strengthens the preprocess method of alloy rigidity after ore deposit |
| CN111500812A (en) * | 2020-05-08 | 2020-08-07 | 张岩 | Method for separating vanadium, titanium and iron from vanadium-titanium magnetite concentrate |
| CN111500812B (en) * | 2020-05-08 | 2022-02-18 | 张岩 | Method for separating vanadium, titanium and iron from vanadium-titanium magnetite concentrate |
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Open date: 20091028 |