CN101519721A - Method for smelting vanadium-titanium-iron ore concentrate - Google Patents
Method for smelting vanadium-titanium-iron ore concentrate Download PDFInfo
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- CN101519721A CN101519721A CN200910301632A CN200910301632A CN101519721A CN 101519721 A CN101519721 A CN 101519721A CN 200910301632 A CN200910301632 A CN 200910301632A CN 200910301632 A CN200910301632 A CN 200910301632A CN 101519721 A CN101519721 A CN 101519721A
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- sefstromite concentrate
- pelletizing
- titanium
- sodium salt
- iron ore
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Abstract
The invention relates to a method for smelting vanadium-titanium-iron ore concentrate, belonging to the metallurgy field, and aiming to provide a method for smelting vanadium-titanium-iron ore concentrate with lower production cost. The method comprises the steps of evenly mixing iron powder, vanadium-titanium-iron ore concentrate, reducing agent and sodium salt solution, adding caking agent, evenly mixing again, making the mixture into balling, drying and reducing the balling in a reducing furnace to obtain reducing balling, wherein the use level of reducing agent is 15-25 percent of the vanadium-titanium-iron ore concentrate by weight of carbon, the use level of the sodium salt is 0.3-1.5 percent of the total amount of the vanadium-titanium-iron ore concentrate and proportion of carbon, and the use level of the iron powder is 1-4 percent of the total amount of the vanadium-titanium-iron ore concentrate and proportion of carbon. The use level of the caking agent causes the materials to be bonded to form the balling. The method reduces the reducing temperature, shortens the reducing time, has lower production cost and has a product metallization ratio above 95 percent, thereby having wide application prospect.
Description
Technical field
The present invention relates to the smelting process of sefstromite concentrate, belong to field of metallurgy.
Background technology
Sefstromite concentrate is meant Fe content 51～62%, TiO
2Content is 5～14%, V
2O
5Content is 0.5～0.93%, and all the other are the ore of impurity.At present, the relevant report of the method for existing directly reduction sefstromite concentrate.
As: " southern metal ", 2005, No.5,23～24, the disclosed method of 27 document " vanadium titano-magnetite prepares the experimental study of the CARBON REDUCTION PROCESS OF TANTALUM of reduced iron powder " is: be reductive agent with the coke, by the interior carbon of joining is 15% of iron ore concentrate, add distinctive additive and iron ore concentrate again and be mixed and made into pelletizing, be 40% of iron ore concentrate by joining carbon outward again, carry out microwave radiation heating in microwave oven, reduced 120 minutes down at 1200 ℃～1250 ℃, obtain reduced iron powder, same pelletizing proportioning was reduced 180 minutes under 1230 ℃ in retort furnace, obtained and 90 minutes same effects of carry out microwave radiation heating.This method is a reductive agent with the higher coke of price, join carbon in being divided into again and join carbon two outward partly, and consumption is many, and the recovery time is long.Degree of metalization in the document after the not mentioned reduction, only speak of resulting iron grade, contain titanium dioxide, silicon oxide, aluminum oxide in the used sefstromite concentrate, other impurity such as calcium oxide, magnesium oxide, these impurity components are counted, and the iron grade after the reduction does not reach the numerical value described in the literary composition (no matter being conventional heating or microwave heating).
And for example: " mineral products comprehensive utilization ", 2006, No.1, the disclosed method of 12～15 document " a kind of sefstromite concentrate prepares the novel process of reduced iron powder " is: be reductive agent with the coke, in to join carbon be 15% of iron ore concentrate, joining carbon outward is 40% of iron ore concentrate, with sodium sulfate and iron powder is additive, respectively by iron ore concentrate 5% and 3% and iron ore concentrate, in join coke, mixed pelletizing, be 1200 ℃～1250 ℃ down reduction 90 minutes at reduction temperature, reduzate separates through the mill choosing and obtains iron powder.This method has reductive agent to join carbon in being divided into equally and joins carbon two outward partly, and consumption is many, and the recovery time is long, and in reduction process, owing to sodium sulfate is difficult for mixing, pelletizing easily collapses efflorescence, thereby influences the normal operation of reduction apparatus.In addition, this method is made binding agent with water glass, reduce in rotary kiln, and the fusing point of water glass is being higher than under the reductive condition of this temperature about 1100 ℃, and water glass can melt the formation liquid phase, causes the pelletizing efflorescence, and the corrosion refractory materials.When in rotary kiln, reducing, low melting point meeting in the pelletizing and the water glass that has melted are bonded on the furnace wall that adds rotary kiln together, form ring formation, time has been grown, this ring formation can be more and more thicker, not only can cause rotary kiln load and energy consumption to increase, also make its volume reduce, production efficiency is significantly reduced.
Join carbon in aforesaid method all needs to add earlier and make pelletizing, add then and joins carbon outward, and consumption is more, production cost is higher, has also that briquetting easily collapses the atomizing problem in the reduction process.
Summary of the invention
Technical problem to be solved by this invention provides the smelting process of the lower sefstromite concentrate of a kind of production cost.
The smelting process of sefstromite concentrate of the present invention comprises the steps: iron powder, sefstromite concentrate, reductive agent and sodium salt solution mixing are added binding agent again, and mixing is made pelletizing once more, and drying is reduced pelletizing at last and obtained reducting pellet in reduction furnace; Wherein, the consumption of described reductive agent is 15～25% of a sefstromite concentrate weight with its carbometer, the consumption of described sodium salt is 0.3～1.5% of sefstromite concentrate and a mixed carbon comtent total amount, the consumption of described iron powder is 1～4% of sefstromite concentrate and a mixed carbon comtent total amount, and the consumption of described binding agent is so that each raw material bonding is made pelletizing.
Above-mentioned iron powder, sefstromite concentrate, reductive agent, sodium salt solution and binding agent can not mixings, because binding agent has certain viscosity, if be mixed together, can cause the smart concentrate batch mixing of iron powder, reductive agent and sodium salt and vanadium ferrotianium irregular, so need earlier with iron powder, sefstromite concentrate, reductive agent and sodium salt solution mixing, add binding agent again, once more mixing.
The iron powder of above-mentioned adding plays a part to make metallic iron to form crystal seed, and plays the associating katalysis with sodium salt, improves reduction efficiency, shortens the recovery time.
Wherein, above-mentioned reductive agent is at least a in coke, coal, carbon black, the charcoal; Above-mentioned sodium salt is Na
2CO
3, NaCl, Na
2SO
4In at least a (Na
2CO
3, NaCl, Na
2SO
4Lattice in the high temperature reduction process in the disruptive oxidation iron of energy, thereby play the effect of catalyzed oxidation iron reductive); Described binding agent is that polyvinyl alcohol water solution (is made binding agent with polyvinyl alcohol water solution, be easy to the control amount of allocating into, made pelletizing can satisfy requirement of strength), the concentration of polyvinyl alcohol water solution is preferably 1～5g/L, and the consumption of described polyvinyl alcohol water solution is 2～7% of a compound gross weight.
Further, the concentration of above-mentioned sodium salt solution is preferably 1.5～3molL
-1
Further, the granularity of above-mentioned raw materials is excessive then can to reduce the reduction kinetics condition, and undersized then can increase the cost of pulverizing each raw material, and the granularity of described reductive agent is preferably 0.25～0.05mm; The granularity of described iron powder is preferably 0.063～0.125mm; The granularity of described sefstromite concentrate is preferably 0.1～0.04mm.
Wherein, the drying mode of above-mentioned pelletizing can be natural airing, as: Exposure to Sunlight 12～72 hours also can be incubated oven dry in 2 hours～42 hours under 50～250 ℃ temperature.
Wherein, above-mentioned reduction furnace can be rotary hearth furnace or tube furnace etc.
Wherein, in order to make pelletizing when reduction metal not oxidized, the reducing atmosphere of pelletizing in reduction furnace is non-oxidizing atmosphere.
Wherein, because the present invention has adopted sodium salt and iron powder associating catalysis, can reduce reduction temperature and shorten the recovery time, the temperature when above-mentioned pelletizing reduces is preferably 1100～1400 ℃, and the recovery time of pelletizing is preferably 7～120min.
The present invention has following beneficial effect:
1, the present invention adopts sodium salt and iron powder associating catalysis, has reduced reduction temperature effectively, has shortened the recovery time, has reduced energy consumption, has improved production efficiency.
2, the present invention is dissolved in water with sodium salt, mixes with reductive agent, additive and sefstromite concentrate then, is pressed into pelletizing after this compound and binding agent being mixed again.This mixing method has guaranteed that sodium salt can be distributed in the sefstromite concentrate equably, thereby has guaranteed that fully sodium salt is to the katalysis of sefstromite concentrate reductive.
3, the sodium salt amount of the present invention's use is few, and sodium salt mixes, and pelletizing can not produce collapse or efflorescence in reduction process.
4, the present invention need not join carbon outward, has reduced the consumption of reductive agent, has further reduced production cost.
5, products obtained therefrom quality of the present invention is good, and the degree of metalization height can reach more than 95%.
Embodiment
Below in conjunction with embodiment the specific embodiment of the present invention is further described, does not therefore limit the present invention among the described scope of embodiments.
The chemical ingredients of used sefstromite concentrate is among the following embodiment: Fe
2O
3=54.39%, FeO=23.45%, TiO
2=12.53%, Al
2O
3=2.41%, SiO
2=2.36%, CaO=1.25%, Cr
2O
3=0.095%, V
2O
5=0.400%, all the other are ash content or other trace ingredients.Reductive agent is a coal dust, and the content of its total carbon is 79.26%.
Embodiment 1
Get sefstromite concentrate 300g, get coal dust 63.4g, granularity is 0.18mm, and getting total iron content is 96.6%, and granularity is the iron powder 4.8g of 0.075mm, and these three kinds of solid material are mixed into compound.Calculating adding concentration by 0.3% of sefstromite concentrate and mixed carbon comtent total amount is 2.00molL
-1Na
2CO
3Aqueous solution 22ml and compound mix, and sneak into polyvinyl alcohol water solution by 3% of compound weight again, and its concentration is 1gL
-1Then this compound is pressed into pelletizing.This pelletizing of sun drying is after 36 hours, get dried pelletizing in tubular oven and CO atmosphere, 1224 ℃ insulation 48 minutes down, (in the reducting pellet, the iron that is reduced into metal multiply by 100% again divided by total iron content institute value in the sefstromite concentrate and is degree of metalization to obtain degree of metalization and be 97.97% reducting pellet.)
Embodiment 2
Get sefstromite concentrate 500g, get coal dust 103.9g, granularity is 0.15mm, and getting total iron content is 97.2%, and granularity is the iron powder 17.0g of 0.090mm, and these three kinds of solid material are mixed into compound.Calculating adding concentration by 1.2% of sefstromite concentrate and mixed carbon comtent total amount is 2.30molL
-1Na
2CO
3Aqueous solution 167ml and compound mix, and sneak into polyvinyl alcohol water solution by 5% of compound weight again, and its concentration is 3gL
-1Then this compound is pressed into pelletizing.At 100 ℃ down after dry 16 hours, get dried pelletizing in tubular oven and CO+N
2Atmosphere, 1224 ℃ insulation 102 minutes down obtains degree of metalization and is 96.45% reducting pellet.
Embodiment 3
Get sefstromite concentrate 700g, get coal dust 200.5g, granularity be 0.10mm to get total iron content be 98.2%, granularity is the iron powder 17.5g of 0.100mm, and these three kinds of solid material are mixed into compound.Calculating adding concentration by 1.5% of sefstromite concentrate and mixed carbon comtent total amount is 1.92molL
-1Na
2CO
3Aqueous solution 63ml and compound mix, and sneak into polyvinyl alcohol water solution by 7% of compound weight again, and its concentration is 1gL
-1Then this compound is pressed into pelletizing.This pelletizing of sun drying is after 46 hours, gets CO atmosphere, the 1280 ℃ insulation 30 minutes down in tubular oven of dried pelletizing, obtains degree of metalization and be 96.62% reducting pellet.
Embodiment 4
Get sefstromite concentrate 300g, get coal dust 63.4g, granularity is 0.18mm, and getting total iron content is 96.6%, and granularity is the iron powder 4.8g of 0.075mm, and these three kinds of solid material are mixed into compound.Calculating adding concentration by 1.4% of sefstromite concentrate and mixed carbon comtent total amount is 2.05molL
-1Na
2SO
4Aqueous solution 17ml and compound mix, and sneak into polyvinyl alcohol water solution by 3% of compound weight again, and its concentration is 1gL
-1Then this compound is pressed into pelletizing.This pelletizing of sun drying is after 36 hours, get dried pelletizing in tubular oven and under the CO atmosphere, 1224 ℃ of insulations 48 minutes down, obtain degree of metalization and be 95.86% reducting pellet.
Embodiment 5
Get sefstromite concentrate 500g, get coal dust 103.9g, granularity is 0.15mm, and getting total iron content is 97.2%, and granularity is the iron powder 17.0g of 0.090mm, and these three kinds of solid material are mixed into compound.Calculating adding concentration by 0.9% of sefstromite concentrate and mixed carbon comtent total amount is 2.40molL
-1NaCl aqueous solution 38ml and compound mix, sneak into polyvinyl alcohol water solution by 5% of compound weight again, its concentration is 3gL
-1Then this compound is pressed into pelletizing.At 100 ℃ down after dry 16 hours, get dried pelletizing in tubular oven and CO+N
2Atmosphere, 1224 ℃ insulation 102 minutes down obtains degree of metalization and is 95.32% reducting pellet.
Claims (7)
- The smelting process of [claim 1] sefstromite concentrate is characterized in that: comprise the steps: iron powder, sefstromite concentrate, reductive agent and sodium salt solution mixing are added binding agent again, mixing once more, make pelletizing, drying is reduced pelletizing at last and is obtained reducting pellet in reduction furnace; Wherein, the consumption of described reductive agent is 15～25% of a sefstromite concentrate weight with its carbometer, the consumption of described sodium salt is 0.3～1.5% of sefstromite concentrate and a mixed carbon comtent total amount, the consumption of described iron powder is 1～4% of sefstromite concentrate and a mixed carbon comtent total amount, and the consumption of described binding agent is so that each raw material bonding is made pelletizing.
- The smelting process of [claim 2] sefstromite concentrate according to claim 1 is characterized in that: described reductive agent is at least a in coke, coal, carbon black, the charcoal; Described sodium salt is Na 2CO 3, NaCl, Na 2SO 4In at least a; Described binding agent is a polyvinyl alcohol water solution.
- The smelting process of [claim 3] sefstromite concentrate according to claim 2 is characterized in that: the concentration of described polyvinyl alcohol water solution is 1～5g/L, and the consumption of described polyvinyl alcohol water solution is 2～7% of a compound gross weight.
- [claim 4] is characterized in that according to the smelting process of each described sefstromite concentrate of claim 1～3: the concentration of described sodium salt solution is 1.5～3molL -1
- [claim 5] is characterized in that according to the smelting process of each described sefstromite concentrate of claim 1～3: the granularity of described reductive agent is 0.25～0.05mm; The granularity of described iron powder is 0.063～0.125mm; The granularity of described sefstromite concentrate is 0.1～0.04mm.
- [claim 6] is characterized in that according to the smelting process of each described sefstromite concentrate of claim 1～3: pelletizing is a non-oxidizing atmosphere when reducing in reduction furnace.
- The smelting process of [claim 7] sefstromite concentrate according to claim 6 is characterized in that: the temperature during the pelletizing reduction is 1100～1400 ℃, and the recovery time of pelletizing is 7～120min.
Priority Applications (1)
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|---|---|---|---|
| CN2009103016320A CN101519721B (en) | 2009-04-17 | 2009-04-17 | Method for smelting vanadium-titanium-iron ore concentrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103016320A CN101519721B (en) | 2009-04-17 | 2009-04-17 | Method for smelting vanadium-titanium-iron ore concentrate |
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| Publication Number | Publication Date |
|---|---|
| CN101519721A true CN101519721A (en) | 2009-09-02 |
| CN101519721B CN101519721B (en) | 2011-04-06 |
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Cited By (9)
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|---|---|---|---|---|
| CN102127640A (en) * | 2011-04-20 | 2011-07-20 | 攀枝花学院 | Method for producing moderate ferrovanadium |
| CN102531048A (en) * | 2012-02-22 | 2012-07-04 | 山东东佳集团股份有限公司 | Method for preparing acid-soluble titanium slag by reduction at low temperature |
| CN102776363A (en) * | 2012-08-21 | 2012-11-14 | 中国科学院青海盐湖研究所 | Process for balling by mixing 200 meshes of celestite mineral powders and reduction coals |
| CN103008098A (en) * | 2012-12-25 | 2013-04-03 | 东北大学 | Solid phase reinforcement reduction-magnetic separation method of vanadium titano-magnetite |
| CN103361481A (en) * | 2013-07-19 | 2013-10-23 | 攀枝花学院 | Preparation method for vanadium-titanium-iron concentrate magnetized pellets for shaft furnace |
| CN104526189A (en) * | 2014-12-19 | 2015-04-22 | 昆明理工大学 | Method for reducing ilmenite through microwave composite reducing agents and preparing electrode coatings |
| CN104651605A (en) * | 2015-02-06 | 2015-05-27 | 唐竹胜 | Preparation method of cold-bonded pellets |
| CN112159880A (en) * | 2020-09-30 | 2021-01-01 | 华北理工大学 | Method and device for making iron by hydrogen |
| CN114672645A (en) * | 2022-03-30 | 2022-06-28 | 攀枝花学院 | Method for preparing ferrotitanium by using vanadium titano-magnetite tailings |
Family Cites Families (3)
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| CN1042651C (en) * | 1995-06-13 | 1999-03-24 | 承德钢铁公司 | Manufacture method of vanadic titanium type ultra-high basicity agglomerate |
| CN1924033A (en) * | 2005-09-01 | 2007-03-07 | 中南大学 | Method of producing acidic pellet ore for blast furnace from vanadium-titanium magnetic concentrate |
| CN100357470C (en) * | 2005-09-27 | 2007-12-26 | 梅卫东 | Method for preparing ferro-titantium, steel and ferrovanadium from vanadium-titantium iron headings |
-
2009
- 2009-04-17 CN CN2009103016320A patent/CN101519721B/en not_active Expired - Fee Related
Cited By (14)
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|---|---|---|---|---|
| CN102127640A (en) * | 2011-04-20 | 2011-07-20 | 攀枝花学院 | Method for producing moderate ferrovanadium |
| CN102127640B (en) * | 2011-04-20 | 2012-10-17 | 攀枝花学院 | Method for producing moderate ferrovanadium |
| CN102531048A (en) * | 2012-02-22 | 2012-07-04 | 山东东佳集团股份有限公司 | Method for preparing acid-soluble titanium slag by reduction at low temperature |
| CN102776363B (en) * | 2012-08-21 | 2014-06-18 | 中国科学院青海盐湖研究所 | Process for balling by mixing 200 meshes of celestite mineral powders and reduction coals |
| CN102776363A (en) * | 2012-08-21 | 2012-11-14 | 中国科学院青海盐湖研究所 | Process for balling by mixing 200 meshes of celestite mineral powders and reduction coals |
| CN103008098A (en) * | 2012-12-25 | 2013-04-03 | 东北大学 | Solid phase reinforcement reduction-magnetic separation method of vanadium titano-magnetite |
| CN103361481A (en) * | 2013-07-19 | 2013-10-23 | 攀枝花学院 | Preparation method for vanadium-titanium-iron concentrate magnetized pellets for shaft furnace |
| CN103361481B (en) * | 2013-07-19 | 2016-01-20 | 攀枝花学院 | A kind of preparation method of shaft furnace sefstromite concentrate magnetization pelletizing |
| CN104526189A (en) * | 2014-12-19 | 2015-04-22 | 昆明理工大学 | Method for reducing ilmenite through microwave composite reducing agents and preparing electrode coatings |
| CN104651605A (en) * | 2015-02-06 | 2015-05-27 | 唐竹胜 | Preparation method of cold-bonded pellets |
| CN112159880A (en) * | 2020-09-30 | 2021-01-01 | 华北理工大学 | Method and device for making iron by hydrogen |
| CN112159880B (en) * | 2020-09-30 | 2022-03-29 | 华北理工大学 | Method and device for making iron by hydrogen |
| CN114672645A (en) * | 2022-03-30 | 2022-06-28 | 攀枝花学院 | Method for preparing ferrotitanium by using vanadium titano-magnetite tailings |
| CN114672645B (en) * | 2022-03-30 | 2024-01-30 | 攀枝花学院 | Method for preparing ferrotitanium alloy from vanadium titano-magnetite tailings |
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| CN101519721B (en) | 2011-04-06 |
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