CN101892381A - Process for producing pellet by mixing and processing hematite, siderite and vanadium titano-magnetite concentrate - Google Patents
Process for producing pellet by mixing and processing hematite, siderite and vanadium titano-magnetite concentrate Download PDFInfo
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- CN101892381A CN101892381A CN 201010224177 CN201010224177A CN101892381A CN 101892381 A CN101892381 A CN 101892381A CN 201010224177 CN201010224177 CN 201010224177 CN 201010224177 A CN201010224177 A CN 201010224177A CN 101892381 A CN101892381 A CN 101892381A
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Abstract
The invention discloses a process for producing pellet by mixing and processing hematite, siderite and vanadium titano-magnetite concentrate, comprising the following steps of: proportioning, mixing, granulating, sieving, drying, preheating and roasting. The specific process conditions are adopted for proportioning, mixing, granulating, sieving, drying, preheating and roasting so that the mixed hematite and siderite and the surface submarginal vanadium titano-magnetite which are difficult to utilize can be well processed and produced into the pellet, wherein the mixed hematite and siderite has the iron concentrate (TFe) grade of 56%, the phosphor content of 0.21-0.35% and the silicon dioxide content of 9.34-10.12%, and the surface submarginal vanadium titano-magnetite has the iron concentrate (TFe) grade of more than 56%, the phosphor content of 0.015% and the silicon dioxide content of 9.13%. Therefore, the advantages of the mixed hematite and siderite and the surface submarginal vanadium titano-magnetite are complemented, and the mixed hematite and siderite and the surface submarginal vanadium titano-magnetite meet the smelting requirement. The invention effectively enhances the utilization rate of the ores and can bring high economic benefit for enterprises and decrease the land occupation of stacked waste ores and the adverse effect on environment.
Description
Technical field
The present invention relates to the pellet complete processing, particularly a kind of red water chestnut and sefstromite concentrate hybrid process pellet technology.
Background technology
Owing to the different reason of the contained composition of ore, some mine will produce a large amount of unmanageable red water chestnut compound iron ores (as about 1.5 hundred million tons of the red water chestnut compound iron ore of Chongqing region Qijiang formula resource) in recovery process, because occurrence status complexity, the multi mineral symbiosis, the ore deposit disseminated grain size is very tiny, is difficult to monomer dissociation; Simultaneously, because iron ore concentrate is phosphorous, it is former thereby can not well be developed to contain silicon-dioxide height etc., finds that after deliberation this type of ore is handled by reducing roasting can obtain iron concentrate grade TFe56%, phosphorus 0.21～0.35%, the ore of silicon-dioxide 9.34～10.12%; Meanwhile, the storage capacity of the low grade vanadium concentrated ilmenite that some mine is difficult to utilize also quite surprising (the low-grade unbalanced-ore as heavy steel Taihe county iron ore has 5,364 ten thousand tons approximately), this type of ore iron concentrate grade can reach more than the TFe56%, phosphorus content very low (being 0.015%), TiO
2Content is 9.13%.Because grade is low and some constituent content is too high, this two classes ore all is difficult to well be utilized, and the stacking floor space is wide, and is also unfavorable to environment.
Pellet is a kind of of artificial massive ore raw material, is the physicals of the uneven ore materials of granularity and chemical constitution are changed to satisfy next step processing request.In the pellet course of processing, the variation (as variations such as density, bundle crack rate, shape, big or small phase physical strengths) of physical properties not only takes place in material owing to rolling balling, the more important thing is the variation (as variations such as chemical constitution, reductibility, swelling property, the high temperature reduction property of softening, the low-temperature reduction property of softening, meltbilities) that chemical property has taken place, thereby the metallurgical performance of material is improved.The basic task of pellet processing technology is used for direct reductive metallic pellet and is applied to comprehensive utilization reclaiming useful metal except that utilizing concentrate and fine ore to make the spherical raw materials for metallurgy, also can producing.
Therefore, can explore a kind of above-mentioned two class ores rationally can be utilized the method for making pellet, to increase economic efficiency, also solve simultaneously and can not utilize the ore stacking and the disadvantageous problem of environment.
Summary of the invention
In view of this, the invention provides a kind of red water chestnut and sefstromite concentrate hybrid process pellet technology, its objective is: phosphorus, the higher Chi Lingkuang that is difficult to utilize of dioxide-containing silica and the lower sefstromite concentrate of grade are fully utilized by this technology, increasing economic efficiency, and solve that abandoned mine is stacked and to the disadvantageous effect of environment.
Red water chestnut of the present invention and sefstromite concentrate hybrid process pellet technology may further comprise the steps successively: batching, mixing, make ball, screening, drying, preheating and roasting;
In the described batching step, adopt reduction roasting magnetic separation process to handle red water chestnut compound iron ore, obtaining iron concentrate grade is TFe56%, phosphorus content is 0.21～0.35%, dioxide-containing silica is that 9.34～10.12% ore is as the raw material I, getting iron concentrate grade is more than the TFe56%, and phosphorus content is 0.015%, TiO
2Content be 9.13% sefstromite concentrate as the raw material II, get raw material I 3～5, raw material II 4～6 and sulfate slag 0～1 by weight and prepare burden;
Described making in the ball step, make the ball condition and be: the weight proportion in the raw material of wilkinite behind mixing is 2.0%, the balling disc inclination angle is 45 degree, disc rotation speed is 22r/min, making the ball time is 14min, and mixture moisture is 8.5～9.0%, and green-ball moisture is 10.5～11.4%;
In the described drying step, drying temperature is no more than that 360 ℃, dry wind speed are no more than 2.0m/s, the material height is no more than 180mm;
In the described pre-heating step, preheating condition is: preheating temperature is that 960～980 ℃, warm up time are 6～8min;
In the described calcination steps, roasting condition is: maturing temperature is that 1220～1240 ℃, roasting time are 6～8min.
Further, the described ball step of making realizes by grate kiln pellet formation technology;
Further, also be included in the sulfate slag pre-treatment step of carrying out before the described batching step, processing mode is single high pressure roller mill pre-treatment of sulfate slag or the single ball milling pretreatment of sulfate slag, makes the specific surface area of sulfate slag reach 1301.7cm
2More than/the g;
Further, also be included in the high pressure roller mill pre-treatment of carrying out between batching and the mixing step, make the specific surface area of raw material I and raw material II reach 1301.7cm
2More than/the g.
The beneficial effect of the invention: red water chestnut of the present invention and sefstromite concentrate hybrid process pellet technology, may further comprise the steps: batching, mixing, make ball, screening, drying, preheating, roasting, the present invention by batching, make ball, drying, preheating and calcination steps and take specific processing condition, can be well with the ore of iron concentrate grade TFe56%, phosphorus 0.21～0.35%, silicon-dioxide 9.34～10.12% and iron concentrate grade be more than the TFe56%, phosphorus content is 0.015%, TiO
2Content is that ore that 9.13% sefstromite concentrate two classes are difficult to utilize is handled and made pellet, realize having complementary advantages, to reach the requirement of smelting, the present invention has improved the ore utilization ratio effectively, can bring high economic benefit for enterprise, simultaneously, having reduced abandoned mine stacks and takes up an area of and to the disadvantageous effect of environment.
Embodiment
Embodiment 1
The red water chestnut of present embodiment and sefstromite concentrate hybrid process pellet technology may further comprise the steps successively: sulfate slag pre-treatment, batching, mixing, make ball, screening, drying, preheating and roasting;
By the single ball milling pretreatment of sulfate slag, the specific surface area of sulfate slag is reached more than the 1301.7cm2/g; The increase of sulfate slag specific surface area produces favourable influence to dropping strength, the ultimate compression strength of green-ball;
In the described batching step, adopt reduction roasting magnetic separation process to handle the red water chestnut compound iron ore of Chongqing Qijiang, obtaining iron concentrate grade is TFe56%, phosphorus content is 0.21～0.35%, dioxide-containing silica is that 9.34～10.12% ore is as the raw material I, the iron concentrate grade of getting heavy steel Taihe county iron ore is more than the TFe56%, and phosphorus content is 0.015%, TiO
2Content be 9.13% off-balancesheet sefstromite concentrate as the raw material II, get 4 parts of raw material I and raw material II by weight and prepare burden for 6 parts;
Described making in the ball step, make ball by grate kiln pellet formation technology, making the ball condition is: the weight proportion in the raw material of wilkinite behind mixing is 2.0%, the balling disc inclination angle is 45 °, disc rotation speed is 22r/min, making the ball time is 14min, and mixture moisture is 9.0%, and green-ball moisture is 11.4%; Through check, the dropping strength of described green-ball be 3.5 times/(0.5m), ultimate compression strength are 13.75N/, burst temperature＞600 ℃, reach the requirement of working condition; Rationally control mixture moisture and green-ball moisture, also can increase the dropping strength and the ultimate compression strength of green-ball.
In the described drying step, drying temperature is no more than that 360 ℃, dry wind speed are no more than 2.0m/s, the material height is no more than 180mm; The green-ball rate of water loss increases with the rising of drying temperature, increases with the prolongation of time of drying, increases with the increase of dry wind speed, reduces along with the high increase of material;
In the described pre-heating step, preheating condition is: preheating temperature is that 960 ℃, warm up time are 6min, and through check, pre-hot-bulb ultimate compression strength reaches 498N/;
In the described calcination steps, roasting condition is: maturing temperature is that 1220 ℃, roasting time are 8min, and through check, the ultimate compression strength of roasting ball reaches 2743N/.
Main chemical compositions to the finished ball nodulizing of present embodiment detects, and detected result sees the following form:
Finished ball chemical ingredients/%
Reach the requirement of working condition.
Embodiment 2
The red water chestnut of present embodiment and sefstromite concentrate hybrid process pellet technology may further comprise the steps successively: batching, mixing, make ball, screening, drying, preheating and roasting;
In the described batching step, adopt reduction roasting magnetic separation process to handle the red water chestnut compound iron ore of Chongqing Qijiang, obtaining iron concentrate grade is TFe56%, phosphorus content is 0.21～0.35%, dioxide-containing silica is that 9.34～10.12% ore is as the raw material I, the iron concentrate grade of getting heavy steel Taihe county iron ore is more than the TFe56%, and phosphorus content is 0.015%, TiO
2Content be 9.13% sefstromite concentrate as the raw material II, get 5 parts of raw material I, 4 parts of raw material II and sulfate slag by weight and prepare burden for 1 part;
Described making in the ball step, make ball by grate kiln pellet formation technology, making the ball condition is: the weight proportion in the raw material of wilkinite behind mixing is 2.0%, the balling disc inclination angle is 45 °, disc rotation speed is 22r/min, making the ball time is 14min, and mixture moisture is 8.5%, and green-ball moisture is 10.5%; Through check, the dropping strength of described green-ball be 3.4 times/(0.5m), ultimate compression strength are 12.56N/, burst temperature＞600 ℃, reach the requirement of working condition; Rationally control mixture moisture and green-ball moisture, also can increase the dropping strength and the ultimate compression strength of green-ball;
In the described drying step, drying temperature is no more than that 360 ℃, dry wind speed are no more than 2.0m/s, the material height is no more than 180mm;
In the described pre-heating step, preheating condition is: preheating temperature is that 980 ℃, warm up time are 8min, and through check, pre-hot-bulb ultimate compression strength reaches 414N/;
In the described calcination steps, roasting condition is: maturing temperature is that 1240 ℃, roasting time are 8min, and through check, the ultimate compression strength of roasting ball reaches 2809N/.
Main chemical compositions and metallurgical performance to the finished ball nodulizing of present embodiment detect, and detected result sees the following form:
Finished ball chemical ingredients/%
Reach the requirement of working condition.
Embodiment 3
The red water chestnut of present embodiment and sefstromite concentrate hybrid process pellet technology may further comprise the steps successively: sulfate slag pre-treatment, batching, high pressure roller mill pre-treatment, mixing, make ball, screening, drying, preheating and roasting;
In the described batching step, adopt reduction roasting magnetic separation process to handle the red water chestnut compound iron ore of Chongqing Qijiang, obtaining iron concentrate grade is TFe56%, phosphorus content is 0.21～0.35%, dioxide-containing silica is that 9.34～10.12% ore is as the raw material I, the iron concentrate grade of getting heavy steel Taihe county iron ore is more than the TFe56%, and phosphorus content is 0.015%, TiO
2Content be 9.13% sefstromite concentrate as the raw material II, get 3 parts of raw material I, 5 parts of raw material II and sulfate slag by weight and prepare burden for 1 part;
By the high pressure roller mill pre-treatment, the specific surface area of raw material I and raw material II compound is reached more than the 1301.7cm2/g;
Described making in the ball step, make ball by grate kiln pellet formation technology, making the ball condition is: the weight proportion in the raw material of wilkinite behind mixing is 2.0%, the balling disc inclination angle is 45 °, disc rotation speed is 22r/min, making the ball time is 14min, and mixture moisture is 9.0%, and green-ball moisture is 11%; Through check, the dropping strength of described green-ball be 3.7 times/(0.5m), ultimate compression strength are 11.78N/, burst temperature＞600 ℃, reach the requirement of working condition; Rationally control mixture moisture and green-ball moisture, also can increase the dropping strength and the ultimate compression strength of green-ball;
In the described drying step, drying temperature is no more than that 360 ℃, dry wind speed are no more than 2.0m/s, the material height is no more than 180mm;
In the described pre-heating step, preheating condition is: preheating temperature is that 960 ℃, warm up time are 8min; Ultimate compression strength is respectively 418N/ and 430N/, all can reach the productive capacity requirement; Through check, pre-hot-bulb ultimate compression strength reaches 418N/;
In the described calcination steps, roasting condition is: maturing temperature is that 1240 ℃, roasting time are 6min, and through check, roasting ball ultimate compression strength reaches 3179N/.
Main chemical compositions and metallurgical performance to the finished ball nodulizing of present embodiment detect, and detected result sees the following form:
Finished ball chemical ingredients/%
Reach the requirement of working condition.
According to national standard, the finished ball to embodiment 1, embodiment 2 and embodiment 3 carries out the metallurgical performance detection respectively, and detected result sees the following form:
The metallurgical performance of finished ball nodulizing
Join the ore deposit scheme from three kinds and make the ball test(ing) result, the balling property of embodiment 1 is better than embodiment 2 and embodiment 3, the balling property of embodiment 2 and embodiment 3 is suitable substantially, this is more relevant with the sulfate slag granularity, after sulfate slag was carried out pre-treatment, the balling property of three embodiment then was more or less the same.
From the preheating and baking test-results of three embodiment, after 3 pairs of sulfate slag high pressure roller mills of embodiment 2 and embodiment or the ball milling pretreatment, the pelletizing preheating and baking performance of embodiment 3 is better relatively, is embodiment 1 secondly, is embodiment 2 at last.Comprehensive main chemical compositions, ultimate compression strength and metallurgical performance, the quality of embodiment 3 finished pellets also outline is better than embodiment 1.
The suitable preheating and baking temperature of the pelletizing of three embodiment is higher relatively, and particularly maturing temperature is unsuitable for adopting the shaft furnace pelletizing process all at 1240 ℃, need take grate kiln pellet formation technology.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1. red water chestnut and sefstromite concentrate hybrid process pellet technology may further comprise the steps successively: batching, mixing, make ball, screening, drying, preheating and roasting, it is characterized in that:
In the described batching step, adopt reduction roasting magnetic separation process to handle red water chestnut compound iron ore, obtaining iron concentrate grade is TFe56%, phosphorus content is 0.21～0.35%, dioxide-containing silica is that 9.34～10.12% ore is as the raw material I, getting iron concentrate grade is more than the TFe56%, and phosphorus content is 0.015%, TiO
2Content be 9.13% sefstromite concentrate as the raw material II, get raw material I 3～5, raw material II 4～6 and sulfate slag 0～1 by weight and prepare burden;
Described making in the ball step, make the ball condition and be: the weight proportion in the raw material of wilkinite behind mixing is 2.0%, the balling disc inclination angle is 45 degree, disc rotation speed is 22r/min, making the ball time is 14min, and mixture moisture is 8.5～9.0%, and green-ball moisture is 10.5～11.4%;
In the described drying step, drying temperature is no more than that 360 ℃, dry wind speed are no more than 2.0m/s, the material height is no more than 180mm;
In the described pre-heating step, preheating condition is: preheating temperature is that 960～980 ℃, warm up time are 6～8min;
In the described calcination steps, roasting condition is: maturing temperature is that 1220～1240 ℃, roasting time are 6～8min.
2. red water chestnut according to claim 1 and sefstromite concentrate hybrid process pellet technology is characterized in that: the described ball step of making realizes by grate kiln pellet formation technology.
3. red water chestnut according to claim 2 and sefstromite concentrate hybrid process pellet technology, it is characterized in that: also be included in the sulfate slag pre-treatment step of carrying out before the described batching step, processing mode is single high pressure roller mill pre-treatment of sulfate slag or the single ball milling pretreatment of sulfate slag, makes the specific surface area of sulfate slag reach 1301.7cm
2More than/the g.
4. red water chestnut according to claim 2 and sefstromite concentrate hybrid process pellet technology is characterized in that: also be included in the high pressure roller mill pre-treatment of carrying out between batching and the mixing step, make the specific surface area of raw material I and raw material II reach 1301.7cm
2More than/the g.
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| CN 201010224177 CN101892381A (en) | 2010-07-12 | 2010-07-12 | Process for producing pellet by mixing and processing hematite, siderite and vanadium titano-magnetite concentrate |
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| CN 201010224177 CN101892381A (en) | 2010-07-12 | 2010-07-12 | Process for producing pellet by mixing and processing hematite, siderite and vanadium titano-magnetite concentrate |
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Cited By (6)
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|---|---|---|---|---|
| CN102776364A (en) * | 2012-08-16 | 2012-11-14 | 中冶北方（大连）工程技术有限公司 | Process for recovering titanium and iron from titanomagnetite tailings |
| CN102776356A (en) * | 2012-07-26 | 2012-11-14 | 山西太钢不锈钢股份有限公司 | Method for improving pellet qualities |
| CN104263911A (en) * | 2014-09-28 | 2015-01-07 | 四川德胜集团钒钛有限公司 | Preparation method of vanadium titano-magnetite sinter |
| CN104357657A (en) * | 2014-12-02 | 2015-02-18 | 内蒙古包钢钢联股份有限公司 | Method for preparing oxidized pellets from converter dedusting ash |
| CN106854705A (en) * | 2015-12-09 | 2017-06-16 | 云南冶金新立钛业有限公司 | It is suitable to ore-proportioning method and its application of titanium slag electric furnace smelting process |
| CN110093504A (en) * | 2019-05-15 | 2019-08-06 | 北京科技大学 | A kind of method and system using high calcium-magnesium-titanium heading preparation rich-titanium material |
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| 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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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102776356A (en) * | 2012-07-26 | 2012-11-14 | 山西太钢不锈钢股份有限公司 | Method for improving pellet qualities |
| CN102776356B (en) * | 2012-07-26 | 2013-08-28 | 山西太钢不锈钢股份有限公司 | Method for improving pellet qualities |
| CN102776364A (en) * | 2012-08-16 | 2012-11-14 | 中冶北方（大连）工程技术有限公司 | Process for recovering titanium and iron from titanomagnetite tailings |
| CN102776364B (en) * | 2012-08-16 | 2013-10-23 | 中冶北方（大连）工程技术有限公司 | Process for recovering titanium and iron from titanomagnetite tailings |
| CN104263911A (en) * | 2014-09-28 | 2015-01-07 | 四川德胜集团钒钛有限公司 | Preparation method of vanadium titano-magnetite sinter |
| CN104263911B (en) * | 2014-09-28 | 2016-08-17 | 四川德胜集团钒钛有限公司 | The preparation method of sintering ore of vanadium-titanium magnetite ore |
| CN104357657A (en) * | 2014-12-02 | 2015-02-18 | 内蒙古包钢钢联股份有限公司 | Method for preparing oxidized pellets from converter dedusting ash |
| CN104357657B (en) * | 2014-12-02 | 2016-08-24 | 内蒙古包钢钢联股份有限公司 | A kind of method utilizing converter dust-removing ash to prepare acid pellet |
| CN106854705A (en) * | 2015-12-09 | 2017-06-16 | 云南冶金新立钛业有限公司 | It is suitable to ore-proportioning method and its application of titanium slag electric furnace smelting process |
| CN110093504A (en) * | 2019-05-15 | 2019-08-06 | 北京科技大学 | A kind of method and system using high calcium-magnesium-titanium heading preparation rich-titanium material |
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Application publication date: 20101124 |