CN101302580B - Preparation of all-sefstromite concentrate pellet ore - Google Patents
Preparation of all-sefstromite concentrate pellet ore Download PDFInfo
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- CN101302580B CN101302580B CN2008103025630A CN200810302563A CN101302580B CN 101302580 B CN101302580 B CN 101302580B CN 2008103025630 A CN2008103025630 A CN 2008103025630A CN 200810302563 A CN200810302563 A CN 200810302563A CN 101302580 B CN101302580 B CN 101302580B
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- sefstromite concentrate
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- pellet ore
- pellet
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Abstract
The invention relates to a method for preparing all vanadium titanium iron ore concentrate pellet ore. The preparation method comprises the following steps that: the all vanadium titanium iron ore concentrate is added with 1.5 to 2.5 percent bentonite, evenly mixed, grinded, pelletized, dried, oxidized and roasted, thereby preparing the all vanadium titanium iron ore concentrate pellet ore; when apellet is preheated, the temperature is between 800 and 1000 DEG C, and the time is between 10 and 15 minutes; when the pellet is roasted, the temperature is between 1200 and 1250 DEG C, and the roasting time is between 15 and 25 minutes. The all vanadium titanium iron ore concentrate pellet ore prepared by the invention comprises 10 to 14 percent of TiO2 and 0.4 to 0.7 percent of V2O5 and has the pressive strength reaching 2400 to 3800 N/each, can meet the smelting need of a large-scale blastfurnace; and the all vanadium titanium iron ore concentrate has low roasting temperature and is easyto realize industrialized production.
Description
Technical field
The present invention relates to the preparation method of blast-furnace smelting, particularly use the method for pellet for the feedstock production blast-furnace smelting, belong to the blast-furnace smelting field with the all-sefstromite concentrate with pellet.
Background technology
China's full vanadium ilmenite concentrate reserves reach more than 10,000,000,000 tons, and particularly the reserves of Panzhihua Region vanadium and titanium account for 1/3 and 1/5 of world's vanadium resource respectively, account for 50% and 90% of national vanadium resource.But blast-furnace smelting if use all-sefstromite concentrate to be the raw material roasting merely, then has processing condition restrictions such as maturing temperature height, roasting time length with pellet, does not see large-scale industrial production so far.
The pellet that smelting vanadium-titanium magnetite by blast furnace adopts at present is that the common iron ore concentrate preparation of all-sefstromite concentrate and different ratios back roasting is made, allocation ratio is generally 70% the all-sefstromite concentrate common fine iron breeze with addition of 30%, such pellet is because sinter process is simpler, use very wide, but high along with domestic common fine iron breeze and import fine ore price, ironmaking cost raises greatly.Therefore, pressing for provides a kind of simple method of using all-sefstromite concentrate as raw material roasting pellet, reduces production costs.
Summary of the invention
First technical problem to be solved by this invention provides a kind of preparation method of all-sefstromite concentrate pellet ore, and this method maturing temperature is low, and roasting time is short, is easy to realize suitability for industrialized production.
The preparation method of all-sefstromite concentrate pellet ore of the present invention for all-sefstromite concentrate with addition of 1.5～2.5% wilkinite mixings, profit mill, make ball, drying, oxidizing roasting and make; Drying system is forced air drying, wind speed 0.6～1.0m/s, and 200 ± 10 ℃ of dry initial temperatures, 2～4 ℃/min of heat-up rate is warming up to 450 ± 20 ℃, constant temperature time 3～5min; The pelletizing preheating of dry back, 800～1000 ℃ of preheating temperatures, time 10～15min; Pelletizing oxidizing roasting after the preheating, 1200 ℃～1250 ℃ of maturing temperatures, roasting time 15～25min.
Molten iron [V] content that the mixing pellet blast furnace that 70% all-sefstromite concentrate is made with addition of 30% common fine iron breeze is produced is about 0.295%, and blast furnace of the present invention contains TiO with all-sefstromite concentrate pellet ore
210～14%, V
2O
50.4～0.7%, pelletizing ultimate compression strength is greater than 600N/ after the preheating, pelletizing ultimate compression strength reaches 2400～3800N/ after the roasting, compare with aforementioned mixing pellet and to have characteristics such as pelletizing ultimate compression strength height after ultimate compression strength height after the preheating, the roasting, can satisfy the requirement that large blast furnace is smelted fully, and blast furnace of the present invention has improved blast-melted middle V content with pellet, is more conducive to improve the output of back step operation vanadium slag, reduces ironmaking cost.
Embodiment
The invention will be further elaborated below in conjunction with embodiment.Embodiment only is used to illustrate the present invention, rather than limits the present invention by any way.
The preparation of embodiment 1 all-sefstromite concentrate pellet ore
All-sefstromite concentrate 10kg, wilkinite 0.15kg packed into carry out mixing in the small-sized electric mixer, the interior profit mill of the horizontal small ball mill of packing into behind the mixing, utilize balling disc (the balling disc size is Φ 800 * 165mm (limit height), rotating speed 23r/min, 46 ° at inclination angle) to make ball, the box air dry oven drying of electric heating, wind speed 1.0m/s, 200 ℃ of dry initial temperatures, 3 ℃/min of heat-up rate, be warming up to 450 ℃, constant temperature 4min.Dried pelletizing in retort furnace in the tube furnace in airiness behind the preheating 15min under 850 ℃ of temperature roasting 20min, 1200 ℃ of maturing temperatures promptly get all-sefstromite concentrate pellet ore of the present invention after the roasting.
This all-sefstromite concentrate pellet ore contains TiO
212.49%, V
2O
50.648%, pelletizing ultimate compression strength 2763N/, can be directly used in blast-furnace smelting, [V] content also can be as the furnace retaining product when the common ore deposit of blast-furnace smelting greater than 0.320% in the molten iron.
The preparation of embodiment 2 all-sefstromite concentrate pellet ores
With all-sefstromite concentrate 10kg, wilkinite 0.20kg packs into and carries out mixing in the small-sized electric mixer, the interior profit mill of the horizontal small ball mill of packing into behind the mixing, (the balling disc size is Φ 800 * 165mm (limit height) to utilize balling disc, rotating speed 23r/min, 46 ° at inclination angle) makes ball, the box air dry oven drying of electric heating, wind speed 1.0m/s, 200 ℃ of dry initial temperatures, 3 ℃/min of heat-up rate is warming up to 450 ℃, constant temperature 5min, to dried pelletizing in retort furnace in the i.e. roasting 20min in the tube furnace in airiness of preheating 12min under 900 ℃ of temperature, 1230 ℃ of maturing temperatures promptly get all-sefstromite concentrate pellet ore of the present invention after the roasting.
This all-sefstromite concentrate pellet ore contains TiO
212.27%, V
2O
50.637%, pelletizing ultimate compression strength 3197N/, can be directly used in blast-furnace smelting, [V] content also can be as the furnace retaining product when the common ore deposit of blast-furnace smelting greater than 0.320% in the molten iron.
The preparation of embodiment 3 all-sefstromite concentrate pellet ores
With all-sefstromite concentrate 10kg, wilkinite 0.25kg packs into and carries out mixing in the small-sized electric mixer, the interior profit mill of the horizontal small ball mill of packing into behind the mixing, (the balling disc size is Φ 800 * 165mm (limit height) to utilize balling disc, rotating speed 23r/min, 46 ° at inclination angle) makes ball, the box air dry oven drying of electric heating, wind speed 1.0m/s, 200 ℃ of dry initial temperatures, 3 ℃/min of heat-up rate is warming up to 450 ℃, constant temperature time 3min, to dried pelletizing in retort furnace in i.e. roasting 20min in the tube furnace in airiness behind the preheating 10min under 950 ℃ of temperature, 1250 ℃ of maturing temperatures promptly get all-sefstromite concentrate pellet ore of the present invention after the roasting.
This all-sefstromite concentrate pellet ore contains TiO
212.16%, V
2O
50.629%, pelletizing ultimate compression strength 3610N/, can be directly used in blast-furnace smelting, [V] content also can be as the furnace retaining product when the common ore deposit of blast-furnace smelting greater than 0.320% in the molten iron.
Claims (4)
1. blast-furnace smelting is characterized in that with the preparation method of all-sefstromite concentrate pellet ore: described all-sefstromite concentrate pellet ore be by all-sefstromite concentrate with addition of the wilkinite of its weight 1.5～2.5% successively by mixing, profit mill, make ball, drying, preheating and oxidizing roasting and make; Described preheating temperature is 800～1000 ℃, time 10～15min; Described oxidizing roasting temperature is 1200 ℃～1250 ℃, roasting time 15～25min.
2. the blast-furnace smelting according to claim 1 preparation method of all-sefstromite concentrate pellet ore, it is characterized in that: the wilkinite add-on is 2.0% of an all-sefstromite concentrate weight.
3. the blast-furnace smelting according to claim 1 and 2 preparation method of all-sefstromite concentrate pellet ore, it is characterized in that: described drying is forced air drying, wind speed 0.6～1.0m/s, 200 ± 10 ℃ of initial temperatures, 2～4 ℃/min of heat-up rate is warming up to 450 ± 20 ℃ of constant temperature 3～5min.
4. the blast-furnace smelting according to claim 1 and 2 preparation method of all-sefstromite concentrate pellet ore, it is characterized in that: described oxidizing roasting temperature is 1230 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008103025630A CN101302580B (en) | 2008-07-07 | 2008-07-07 | Preparation of all-sefstromite concentrate pellet ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008103025630A CN101302580B (en) | 2008-07-07 | 2008-07-07 | Preparation of all-sefstromite concentrate pellet ore |
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| Publication Number | Publication Date |
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| CN101302580A CN101302580A (en) | 2008-11-12 |
| CN101302580B true CN101302580B (en) | 2010-06-09 |
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| CN2008103025630A Expired - Fee Related CN101302580B (en) | 2008-07-07 | 2008-07-07 | Preparation of all-sefstromite concentrate pellet ore |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220486A (en) * | 2011-06-22 | 2011-10-19 | 攀钢集团有限公司 | Acidic full-vanadium-titanium pellets and preparation method thereof |
| 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 |
| CN103667678B (en) * | 2013-12-05 | 2016-02-03 | 江苏省冶金设计院有限公司 | A kind of shaft furnace vanadium titano-magnetite acid pellet sinter process |
| CN104087746B (en) * | 2014-07-15 | 2016-06-29 | 首钢总公司 | A kind of preparation method of magnesia titaniferous pellet |
| CN104862470B (en) * | 2015-05-13 | 2017-10-03 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method for shortening the pellet roasting time |
| CN105734271A (en) * | 2016-04-15 | 2016-07-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Pellet containing chromium, vanadium and titanium and production method of pellet |
| CN105907956B (en) * | 2016-06-27 | 2017-11-03 | 东北大学 | A kind of low-grade acid pellet containing chromic vanadium-titanium ferroferrite and preparation method thereof |
| CN109055734A (en) * | 2018-10-09 | 2018-12-21 | 鞍钢股份有限公司 | A kind of preparation method of blast furnace protecting composite briquette ore |
| CN110616313A (en) * | 2019-07-10 | 2019-12-27 | 李秀琴 | Method for preparing raw materials for producing sintered ore and pellet ore and crushing and mixing machine |
| CN113957240A (en) * | 2021-10-20 | 2022-01-21 | 中南大学 | Preparation method of manganese-containing vanadium-titanium magnetite pellet |
Citations (3)
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| CN1557976A (en) * | 2004-02-09 | 2004-12-29 | 重庆钢铁(集团)有限责任公司 | Furnace protecting acid pellet and production technology thereof |
| CN1804059A (en) * | 2005-12-15 | 2006-07-19 | 鲜帆 | Direction reduction and electric furnace smelting-separation preparation process of vanadium-titanium magnetite cold bound pellet |
| 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 |
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2008
- 2008-07-07 CN CN2008103025630A patent/CN101302580B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1557976A (en) * | 2004-02-09 | 2004-12-29 | 重庆钢铁(集团)有限责任公司 | Furnace protecting acid pellet and production technology thereof |
| 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 |
| CN1804059A (en) * | 2005-12-15 | 2006-07-19 | 鲜帆 | Direction reduction and electric furnace smelting-separation preparation process of vanadium-titanium magnetite cold bound pellet |
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| CN101302580A (en) | 2008-11-12 |
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Address after: 611731 No. 1 Tianlong Road, hi tech West District, Sichuan, Chengdu Co-patentee after: Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. Patentee after: Pangang Group Institute Co., Ltd. Co-patentee after: Pangang Group Steel Vanadium & Titanium Co., Ltd. Address before: 611731 No. 1 Tianlong Road, hi tech West District, Sichuan, Chengdu Co-patentee before: Pangang Group Panzhihua Iron & Steel Research Institute Co., Ltd. Patentee before: Pangang Group Institute Co., Ltd. Co-patentee before: Panzhihua New Steel & Vanadium Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20100609 Termination date: 20160707 |