CN1924037A - Method of comprehensive utilizing tin-zinc containing magnetic concentrate - Google Patents
Method of comprehensive utilizing tin-zinc containing magnetic concentrate Download PDFInfo
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- CN1924037A CN1924037A CNA200510032098XA CN200510032098A CN1924037A CN 1924037 A CN1924037 A CN 1924037A CN A200510032098X A CNA200510032098X A CN A200510032098XA CN 200510032098 A CN200510032098 A CN 200510032098A CN 1924037 A CN1924037 A CN 1924037A
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- zinc
- stanniferous
- tin
- preheating
- magnetite concentrate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses a synthetic utilizing method of tin zinc magnetic ore, which comprises the following steps: allocating; blending evenly; polishing; balling; drying; preheating; reducing; sintering; proceeding dried-type magnetic cobbing. The invention recycles tin and zinc in the flue gas effectively, which makes preheat ball pressure-resistance intensity more than 600N/unit.
Description
Technical field
The invention belongs to the ferrous metallurgy field, relate to and a kind ofly comprehensively reclaim tin and zinc and prepare electric furnace with the method for metallized pellet from stanniferous zinc magnetite concentrate.
Background technology
China's iron ore deposit is abundant, but most of iron ore is low grade ore and complex multi-metal ore deposit, belongs to difficulty and selects difficult smelting ore.The complicated iron ore of stanniferous zinc is the refractory ore of a quasi-representative, and this ore reserves is abundant, but symbiotic relationship is very complicated, and sorting smelting difficulty is big.The iron ore concentrate tin zinc content height (Sn＞0.08%, Zn＞0.1%) that ore dressing obtains can not directly be used as the Iron and Steel Production raw material.At present, the main methods of research report is a chlorinating roasting, but since serious to equipment corrosion, do not realize industrialization.Thereby such ore is not well utilized so far, and exploitation comprehensive utilization stanniferous franklinite resource novel method has important practical significance.
The present invention is a kind ofly comprehensively reclaimed tin and zinc and is prepared electric furnace with the method for metallized pellet by stanniferous zinc magnetite concentrate.
Summary of the invention
In order to make full use of stanniferous zinc-iron concentrate, for electrosmelting provides the high-test metal furnace charge, realize the efficient recovery of associated element tin and zinc in the iron ore concentrate simultaneously, special the present invention proposed.
A kind of comprehensive utilization stanniferous zinc magnetite concentrate method the present invention includes stanniferous zinc magnetite concentrate and prepares burden, mixing, profit mill, makes links such as ball, drying, preheating and reducing roasting, dry type magnetic separation with addition of binding agent.At first magnetite concentrate and additive sodium humate are prepared burden, mixing, compound profit mill back is prepared into the green-ball of 8-16mm, drying and preheating on drying grate then in balling disc; 860 ℃-1000 ℃ of preheating temperatures, warm up time 8-14min, pelletizing enters rotary kiln baking after the preheating, and joining granularity outside the while is 5-25mm brown coal or bituminous coal, and feeding temperature is 750-850 ℃, heat-up rate according to 5-8.5 ℃/min rises to constant temperature, thermostat temperature is 1025-1100 ℃, constant temperature time 80-120min, C/Fe=0.4-0.8, kiln filling ratio 16-20%, kiln rotating speed 0.5-2r/min.
Described stanniferous zinc magnetite concentrate stanniferous 0.08-0.80%, zinc 0.1-1.0%.
Described additive is a sodium humate, and its consumption is 1.0-3.0%.
The present invention adopts preoxidation pelletizing reduction roasting method to handle the complicated iron ore of stanniferous zinc, realized the effective volatilization of tin, zinc, the metallized pellet product quality indicator of producing satisfies the requirement of electrosmelting, can solve present Electric furnace steel making furnace charge problem in short supply, is applicable to production high-quality special steel.Adopt the present invention can comprehensively reclaim volatilization simultaneously and enter tin and zinc in the flue gas.The preheating pelletizing ultimate compression strength that the present invention produces is greater than 600N/, iron recovery is 94-98% after the reducing roasting, the TFe grade is 88-90%, magnetic powder rate less than 3mm is 0.05-0.5%, metallized pellet ultimate compression strength can reach 2000-2600N/, remaining tin content 0.01-0.035% in the pelletizing, remaining zinc content is 0-0.025%.
Description of drawings
Fig. 1: process flow diagram of the present invention.
Embodiment
1: the sodium humate of interpolation 1.5% moistens mill, makes ball in stanniferous zinc-iron concentrate (Sn 0.40%, and Zn 0.38%), and green-ball is directly sent into the rotary kiln reducing roasting behind drying and preheating on the drying grate.Also raw coal adopts brown coal.The rotary kiln baking system is: 850 ℃ of feeding temperatures, pelletizing go into that the heat-up rate according to 7.5 ℃/min rises to constant temperature behind the kiln.The thermostat temperature scope is controlled to be 1025-1050 ℃, and the constant temperature calcining time is 90min, and C/Fe is 0.6.Obtain the metallized pellet degree of metalization greater than 94.96%, the TFe grade is 88.89%, and iron recovery is 94.13%; The remaining tin content of product is 0.021%, and remaining zinc content is 0.013%, and metallic pellet ultimate compression strength is 2128N/.
2: add 1.25% sodium humate and moisten mill, make ball in stanniferous zinc-iron concentrate (Sn 0.17%, and Zn 0.20%), green-ball is sent into rotary kiln and is carried out high temperature reduction behind the drying grate drying and preheating.Also raw coal adopts sub-bituminous coal.The rotary kiln baking system is: 800 ℃ of feeding temperatures, pelletizing rise to constant temperature according to 8.2 ℃/min heat-up rate after going into kiln.The thermostat temperature scope is controlled to be 1050-1070 ℃, and roasting time is 80min, and C/Fe is 0.5.Obtaining the metallized pellet degree of metalization is 94.25%, and the TFe grade is 89.52%, and iron recovery is 94.13%, and ultimate compression strength is 2012N/, and the remaining tin content of product is 0.011%, and zinc is trace.
3: add 2.5% sodium humate and moisten mill, make ball in tin zinc-iron breeze (Sn 0.68%, and Zn 0.89%), green-ball is sent into rotary kiln and is carried out the high temperature reduction roasting behind the drying grate drying and preheating.Also raw coal adopts bituminous coal.The rotary kiln baking system is: 750 ℃ of feeding temperatures, pelletizing rise to constant temperature according to 5.5 ℃/min heat-up rate after going into kiln.The thermostat temperature scope is controlled to be 1040-1060 ℃, and the constant temperature calcining time is 100min, and C/Fe is 0.7.Obtain that tin and zinc evaporation rate are respectively 96.32% and 97.02%, the pelletizing degree of metalization is 94.10%, TFe grade 89.05%, ultimate compression strength are 2245N/ metallized pellet, remaining tin and zinc content are for being respectively 0.033% and 0.022% in the pelletizing.
Claims (3)
1. comprehensive utilization stanniferous zinc magnetite concentrate method is at first prepared burden magnetite concentrate and 1.0-2.0% sodium humate, mixing, makes ball, drying behind the compound profit mill; 860 ℃-1000 ℃ of preheating temperatures, warm up time 8-14min, pelletizing enters rotary kiln baking after the preheating, and joining granularity outside the while is 5-25mm brown coal or bituminous coal, and feeding temperature is 750-850 ℃, heat-up rate according to 5-8.5 ℃/min rises to constant temperature, thermostat temperature is 1025-1100 ℃, constant temperature time 80-120min, C/Fe=0.4-0.8, kiln filling ratio 16-20%, kiln rotating speed 0.5-2r/min.
2. method according to claim 1 is characterized in that: described magnetite concentrate stanniferous 0.08-0.80%, zinc 0.10-1.0%.
3. method according to claim 1 is characterized in that: described additive is a sodium humate, and its consumption is 1.0-3.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200510032098XA CN1924037A (en) | 2005-09-01 | 2005-09-01 | Method of comprehensive utilizing tin-zinc containing magnetic concentrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200510032098XA CN1924037A (en) | 2005-09-01 | 2005-09-01 | Method of comprehensive utilizing tin-zinc containing magnetic concentrate |
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| Publication Number | Publication Date |
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| CN1924037A true CN1924037A (en) | 2007-03-07 |
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| CNA200510032098XA Pending CN1924037A (en) | 2005-09-01 | 2005-09-01 | Method of comprehensive utilizing tin-zinc containing magnetic concentrate |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643834B (en) * | 2009-06-22 | 2011-12-07 | 云南锡业集团（控股）有限责任公司 | Combined process flow processing method of high-iron low-tin oxidized ore |
| CN102517439A (en) * | 2012-01-10 | 2012-06-27 | 中南大学 | Method for selectively roasting and separating tin, zinc and arsenic in compound iron ore containing tin, zinc and arsenic |
| CN102534087A (en) * | 2012-01-10 | 2012-07-04 | 中南大学 | Method for preparing metallized pellets by utilizing stannum-zinc-arsenic-contained complex iron ore |
| CN101792867B (en) * | 2009-11-16 | 2012-07-18 | 云南锡业集团（控股）有限责任公司 | Combined flow treatment method of tin rough concentrate |
| CN106222401A (en) * | 2016-09-21 | 2016-12-14 | 内蒙古包钢钢联股份有限公司 | The preparation method of pellet |
-
2005
- 2005-09-01 CN CNA200510032098XA patent/CN1924037A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643834B (en) * | 2009-06-22 | 2011-12-07 | 云南锡业集团（控股）有限责任公司 | Combined process flow processing method of high-iron low-tin oxidized ore |
| CN101792867B (en) * | 2009-11-16 | 2012-07-18 | 云南锡业集团（控股）有限责任公司 | Combined flow treatment method of tin rough concentrate |
| CN102517439A (en) * | 2012-01-10 | 2012-06-27 | 中南大学 | Method for selectively roasting and separating tin, zinc and arsenic in compound iron ore containing tin, zinc and arsenic |
| CN102534087A (en) * | 2012-01-10 | 2012-07-04 | 中南大学 | Method for preparing metallized pellets by utilizing stannum-zinc-arsenic-contained complex iron ore |
| CN102534087B (en) * | 2012-01-10 | 2013-04-24 | 中南大学 | Method for preparing metallized pellets by utilizing stannum-zinc-arsenic-contained complex iron ore |
| CN106222401A (en) * | 2016-09-21 | 2016-12-14 | 内蒙古包钢钢联股份有限公司 | The preparation method of pellet |
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