CN101988178B - Direct melting method for zinc pot of hot dipped aluminum-zinc steel sheet production line - Google Patents
Direct melting method for zinc pot of hot dipped aluminum-zinc steel sheet production line Download PDFInfo
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- CN101988178B CN101988178B CN2010102908535A CN201010290853A CN101988178B CN 101988178 B CN101988178 B CN 101988178B CN 2010102908535 A CN2010102908535 A CN 2010102908535A CN 201010290853 A CN201010290853 A CN 201010290853A CN 101988178 B CN101988178 B CN 101988178B
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Abstract
The invention discloses a direct melting method for a zinc pot of a hot dipped aluminum-zinc steel sheet production line. The method comprises the following steps of: pumping aluminum-zinc liquid by using a zinc pump, and allowing the zinc pot to slowly cool; during remelting, adding aluminum and zinc for the first time, and positioning upper surfaces of aluminum-zinc ingots 40 to 60 millimeters below a furnace throat; turning on the furnace and baking according to the following requirements: in a region of between room temperature and 150 DEG C, the heating speed is 10 to 20 DEG C/hour, and the temperature is maintained for 44 to 52 hours at the temperature of 150 DEG C; in a region of between 151 and 250 DEG C, the heating speed is 5 to 15 DEG C/hour, and the temperature is maintained for 20 to 30 hours at the temperature of 250 DEG C; in a region of between 251 and 350 DEG C, the heating speed is 5 to 15 DEG C/hour, and the temperature is maintained for 44 to 52 hours at the temperature of 350 DEG C; and in a region of between 351 and 460 DEG C, the heating speed is 5 to 15 DEG C/hour, and the temperature is maintained for 65 to 80 hours at the temperature of 460 DEG C; and when furnace temperature reaches 460 DEG C, adding the aluminum and zinc for the second time, when the temperature reaches 520 DEG C, rapidly adding large aluminum-zinc ingots into the zinc pot to allow an aluminum-zinc liquid level to be 150 to 300 millimeters higher than a bottom part of a furnace nose, and melting the aluminum and zinc for about 2 to 3 days to make the hot dipped aluminum-zinc steel sheet production line put into production. The direct melting method has the characteristics of direct melting, time and cost conservation and the like.
Description
Technical field
What the present invention relates to is that a kind of zinc pot of hot-dip aluminizing zincium steel plate production line directly plays melting method, belongs to the production technical field of hot-dip aluminizing zincium steel plate.
Background technology
The technical process that the hot-dip aluminizing zincium steel plate production line adopts is: hot-rolled sheet is through joining the cold rolling rolling process of milling train group; Cold-rolled steel sheet is through the matting of alkali cleaning, washing; Cold-rolled steel sheet is through stove annealed annealing operation; Annealed sheet steel is through the hot-dip aluminizing zinc operation of zinc pot, hot-dip aluminizing zincium steel plate drawn, the curved stretch bending operation of rectifying, and hot-dip aluminizing zincium steel plate finally becomes the hot-dip aluminizing zincium steel plate finished product through passivation, inunction process.In the above-mentioned technological process of production, coating aluminium zinc adds the thermal recovery inductor provides heat.But when production line stops to produce because of certain reason, just need release aluminium zinc liquid, let zinc pot naturally cooling, unload inductor with the zinc pump.When opening production line again after a period of time, inductor needs ramming again, and ramming and baking process carry out according to normal method.Above-mentioned way is normal in the ordinary course of things.If but inductor duration of service is long or inductor can also be used very for a long time, because of other reason of production line makes inductor ramming and baking again, operation just seems has like this wasted greatly.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, and provide a kind of direct to melt, thereby the zinc pot that can save time and practice thrift the hot-dip aluminizing zincium steel plate production line of cost directly plays melting method.
The objective of the invention is to accomplish through following technical scheme; Described zinc pot directly plays melting method: when production line stops to produce because of certain reason; Release aluminium zinc liquid with the zinc pump earlier; Aluminium zinc liquid is extracted into till following 30 millimeters of the furnace throat, and at this moment insulation cover on zinc pot upper cover lets the zinc pot slowly cool off; Again rise when melting, take away insulation cover, do not have aluminium zinc like the bottom of a pan, need add aluminium zinc this moment for the first time, makes the zinc ingot metal upper surface be in 40-60 millimeter under the furnace throat; After changing the heating lid of a strip resistance silk, play the stove baking according to following requirement: in ℃ interval, room temperature～150, heat-up rate 10-20 ℃/hour, 150 ℃ of insulations 44-52 hour; In 151 ℃～250 ℃ intervals, heat-up rate 5-15 ℃/hour, insulation is 20-30 hour in the time of 250 ℃; In 251 ℃～350 ℃ intervals, heat-up rate 5-15 ℃/hour, insulation is 44-52 hour in the time of 350 ℃; In 351 ℃～460 ℃ intervals, heat-up rate 5-15 ℃/hour, insulation is 65-80 hour in the time of 460 ℃; When furnace temperature reaches 460 ℃, at this moment carry out adding the second time aluminium zinc, after guaranteeing molten aluminium zinc; Aluminium zinc liquid surpasses furnace throat and is as the criterion, and after the aluminium zinc fusing by the time, inductor is carried out low power sent electrically heated one day; Send 1/6 of the given maximum capacity of electric weight, treat that aluminium zinc in the channel all after the fusing, just can transfer the superpower heating to; 1/3, the three day that second day was total volume is 2/3 of total volume; After treating hour insulation of 460 ℃, 65-80, arrive 520 ℃, can in the zinc pot, add big aluminium zinc ingot metal fast with 10-20 ℃/hour heat-up rate; When treating aluminium zinc liquid level, clean out the table slag on aluminium zinc liquid surface, quicken then to add big aluminium zinc ingot metal, make aluminium zinc liquid level surge 10-14 millimeter, flood the stove nose, can avoid booty to get into the stove nose like this apart from stove nose 4-8 millimeter; Continue to add big aluminium zinc ingot metal, make aluminium zinc liquid level surpass 150～300 millimeters of stove nose bottoms,, the zinc wire of aluminizing is gone into operation on about 2～3 days of 520 ℃ of molten aluminium zinc.
Described aluminium zinc liquid is pumped to till following 30 millimeters of the furnace throat, in channel, is inserted with diameter and is 30 millimeters iron rod, and at this moment insulation cover on zinc pot upper cover again lets the zinc pot slowly cool off, and rises molten then again.
Described preferred method is: add aluminium zinc for the first time, preferably one of little aluminium zinc ingot metal with 10～20 kilogram weights connects one filling, and makes aluminium zinc ingot metal upper surface be in 50 millimeter under the furnace throat; Change the heating lid of a strip resistance silk, play the stove baking according to following requirement: in ℃ interval, room temperature～150,15 ℃/hour of heat-up rates were 150 ℃ of insulations 48 hours; In 151 ℃～250 ℃ intervals, 10 ℃/hour of heat-up rates, insulation is 24 hours in the time of 250 ℃; In 251 ℃～350 ℃ intervals, 10 ℃/hour of heat-up rates, insulation is 48 hours in the time of 350 ℃; In 351 ℃～460 ℃ intervals, 10 ℃/hour of heat-up rates, insulation is 72 hours in the time of 460 ℃; When furnace temperature reaches 460 ℃, at this moment carry out adding aluminium zinc the second time, add about about 2 tons, after guaranteeing molten aluminium zinc; Aluminium zinc liquid surpasses furnace throat and is as the criterion, and after these 2 tons of aluminium zinc fusings, inductor is carried out low power sent electrically heated one day by the time; Send 1/6 of the given maximum capacity of electric weight, treat that aluminium zinc in the channel all after the fusing, extracts iron rod; Just can transfer superpower heating to, second day be that 1/3, the three day of total volume is 2/3 of a total volume; After treating insulation in 460 ℃, 72 hours, arrive 520 ℃, can in the zinc pot, add big aluminium zinc ingot metal fast with 15 ℃/hour heat-up rates; When treating aluminium zinc liquid level, clean out the table slag on aluminium zinc liquid surface, quicken then to add big aluminium zinc ingot metal, make 12 millimeters of aluminium zinc liquid level surges, flood the stove nose apart from 6 millimeters in stove nose.
The present invention compared with prior art, have can directly rise molten, thereby characteristics such as can save time and cost.
Embodiment
To combine specific embodiment that the present invention is done detailed introduction below: zinc pot of the present invention directly plays melting method and is: when production line stops to produce because of certain reason; Release aluminium zinc liquid with the zinc pump earlier; Aluminium zinc liquid is extracted into till following 30 millimeters of the furnace throat; At this moment insulation cover on zinc pot upper cover lets the zinc pot slowly cool off; Again rise when melting, take away insulation cover, do not have aluminium zinc like the bottom of a pan, need add aluminium zinc this moment for the first time, makes aluminium zinc ingot metal upper surface be in 40-60 millimeter under the furnace throat; After changing the heating lid of a strip resistance silk, play the stove baking according to following requirement: in ℃ interval, room temperature～150, heat-up rate 10-20 ℃/hour, 150 ℃ of insulations 44-52 hour; In 151 ℃～250 ℃ intervals, heat-up rate 5-15 ℃/hour, insulation is 20-30 hour in the time of 250 ℃; In 251 ℃～350 ℃ intervals, heat-up rate 5-15 ℃/hour, insulation is 44-52 hour in the time of 350 ℃; In 351 ℃～460 ℃ intervals, heat-up rate 5-15 ℃/hour, insulation is 65-80 hour in the time of 460 ℃; When furnace temperature reaches 460 ℃, at this moment carry out adding the second time aluminium zinc, after guaranteeing molten aluminium zinc; Aluminium zinc liquid surpasses furnace throat and is as the criterion, and after the aluminium zinc fusing by the time, inductor is carried out low power sent electrically heated one day; Send 1/6 of the given maximum capacity of electric weight, treat that aluminium zinc in the channel all after the fusing, just can transfer the superpower heating to; 1/3, the three day that second day was total volume is 2/3 of total volume; After treating hour insulation of 460 ℃, 65-80, arrive 520 ℃, can in the zinc pot, add big aluminium zinc ingot metal fast with 10-20 ℃/hour heat-up rate; When treating aluminium zinc liquid level, clean out the table slag on aluminium zinc liquid surface, quicken then to add big aluminium zinc ingot metal, make aluminium zinc liquid level surge 10-14 millimeter, flood the stove nose, can avoid booty to get into the stove nose like this apart from stove nose 4-8 millimeter; Continue to add big aluminium zinc ingot metal, make aluminium zinc liquid level surpass 150～300 millimeters of stove nose bottoms,, the zinc wire of aluminizing is gone into operation on about 2～3 days of 520 ℃ of molten aluminium zinc.
Described aluminium zinc liquid is pumped to till following 30 millimeters of the furnace throat, in channel, is inserted with diameter and is 30 millimeters iron rod, and at this moment insulation cover on zinc pot upper cover again lets the zinc pot slowly cool off, and rises molten then again.
Described preferred method is: add aluminium zinc for the first time, preferably one of little aluminium zinc ingot metal with 10～20 kilogram weights connects one filling, and makes aluminium zinc ingot metal upper surface be in 50 millimeter under the furnace throat; Change the heating lid of a strip resistance silk, play the stove baking according to following requirement: in ℃ interval, room temperature～150,15 ℃/hour of heat-up rates were 150 ℃ of insulations 48 hours; In 151 ℃～250 ℃ intervals, 10 ℃/hour of heat-up rates, insulation is 24 hours in the time of 250 ℃; In 251 ℃～350 ℃ intervals, 10 ℃/hour of heat-up rates, insulation is 48 hours in the time of 350 ℃; In 351 ℃～460 ℃ intervals, 10 ℃/hour of heat-up rates, insulation is 72 hours in the time of 460 ℃; When furnace temperature reaches 460 ℃, at this moment carry out adding aluminium zinc the second time, add about about 2 tons, after guaranteeing molten aluminium zinc; Aluminium zinc liquid surpasses furnace throat and is as the criterion, and after these 2 tons of aluminium zinc fusings, inductor is carried out low power sent electrically heated one day by the time; Send 1/6 of the given maximum capacity of electric weight, treat that aluminium zinc in the channel all after the fusing, extracts iron rod; Just can transfer superpower heating to, second day be that 1/3, the three day of total volume is 2/3 of a total volume; After treating insulation in 460 ℃, 72 hours, arrive 520 ℃, can in the zinc pot, add big aluminium zinc ingot metal fast with 15 ℃/hour heat-up rates; When treating aluminium zinc liquid level, clean out the table slag on aluminium zinc liquid surface, quicken then to add big aluminium zinc ingot metal, make 12 millimeters of aluminium zinc liquid level surges, flood the stove nose apart from 6 millimeters in stove nose.
Embodiment 1,
When production line stops to produce because of certain reason, just to release aluminium zinc liquid with the zinc pump, aluminium zinc liquid is extracted into till following 30 millimeters of the furnace throat, and the insertion diameter is 30 millimeters a iron rod in channel, and at this moment insulation cover on zinc pot upper cover lets the zinc pot slowly cool off.
By the time the other problem of production line has solved and will rise again when melting; Take away insulation cover, if the original the bottom of a pan does not have aluminium zinc, need add aluminium zinc this moment for the first time; Preferably one of little aluminium zinc ingot metal with 10～20 kilogram weights connects one filling, and makes aluminium zinc ingot metal upper surface be in 50 millimeter under the furnace throat.Change the heating lid of a strip resistance silk, stipulated the stove baking according to following table:
When furnace temperature reaches 460 ℃, at this moment carry out adding aluminium zinc the second time, add about about 2 tons (after guaranteeing molten aluminium zinc; Aluminium zinc liquid surpasses furnace throat), by the time after these 2 tons of aluminium zinc fusings, inductor is carried out low power (send the given maximum capacity of electric weight 1/6) sent electrically heated one day; After treating the whole fusings of aluminium zinc in the channel; Extract iron rod, just can transfer superpower heating (second day for total volume 1/3, the three day be total volume 2/3) to.After treating insulation in 460 ℃, 72 hours, arrive 520 ℃, can in the zinc pot, add big aluminium zinc ingot metal fast with 15 ℃/hour heat-up rates.When treating aluminium zinc liquid level, clean out the table slag on aluminium zinc liquid surface, quicken then to add big aluminium zinc ingot metal, make 12 millimeters of aluminium zinc liquid level surges, flood the stove nose, can avoid booty to get into the stove nose like this apart from 6 millimeters in stove nose.Continue to add big aluminium zinc ingot metal, make aluminium zinc liquid level surpass 150～300 millimeters of stove nose bottoms,, the zinc wire of aluminizing is gone into operation on about 2～3 days of 520 ℃ of molten aluminium zinc.
Other embodiments of the invention can be in above-mentioned concrete numerical range; Comprise that rate of warming, soaking time etc. replace arbitrarily embodiment 1 and obtain; Because of the replacement of these numerical value belongs to well-known to those skilled in the art, thereby can implement easily.
Claims (3)
1. the zinc pot of a hot-dip aluminizing zincium steel plate production line directly plays melting method; This method is: when production line stops to produce because of certain reason, release aluminium zinc liquid with the zinc pump earlier, aluminium zinc liquid is extracted into till following 30 millimeters of the furnace throat; At this moment insulation cover on zinc pot upper cover lets the zinc pot slowly cool off; Again rise when melting, take away insulation cover, do not have aluminium zinc like the bottom of a pan, need add aluminium zinc this moment for the first time, makes aluminium zinc ingot metal upper surface be in 40-60 millimeter under the furnace throat; After changing the heating lid of a strip resistance silk, play the stove baking according to following requirement: in ℃ interval, room temperature～150, heat-up rate 10-20 ℃/hour, 150 ℃ of insulations 44-52 hour; In 151 ℃～250 ℃ intervals, heat-up rate 5-15 ℃/hour, insulation is 20-30 hour in the time of 250 ℃; In 251 ℃～350 ℃ intervals, heat-up rate 5-15 ℃/hour, insulation is 44-52 hour in the time of 350 ℃; In 351 ℃～460 ℃ intervals, heat-up rate 5-15 ℃/hour, insulation is 65-80 hour in the time of 460 ℃; When furnace temperature reaches 460 ℃, at this moment carry out adding the second time aluminium zinc, after guaranteeing molten aluminium zinc; Aluminium zinc liquid surpasses furnace throat and is as the criterion, and after the aluminium zinc fusing by the time, inductor is carried out low power sent electrically heated one day; Send 1/6 of the given maximum capacity of electric weight, treat that aluminium zinc in the channel all after the fusing, just can transfer the superpower heating to; 1/3, the three day that second day was total volume is 2/3 of total volume; After treating hour insulation of 460 ℃, 65-80, arrive 520 ℃, can in the zinc pot, add big aluminium zinc ingot metal fast with 10-20 ℃/hour heat-up rate; When treating aluminium zinc liquid level, clean out the table slag on aluminium zinc liquid surface, quicken then to add big aluminium zinc ingot metal, make aluminium zinc liquid level surge 10-14 millimeter, flood the stove nose, can avoid foul to get into the stove nose like this apart from stove nose 4-8 millimeter; Continue to add big aluminium zinc ingot metal, make aluminium zinc liquid level surpass 150～300 millimeters of stove nose bottoms, after 2～3 days, the zinc wire of aluminizing is gone into operation at 520 ℃ of molten aluminium zinc.
2. the zinc pot of hot-dip aluminizing zincium steel plate production line according to claim 1 directly plays melting method; It is characterized in that described aluminium zinc liquid is pumped to till following 30 millimeters of the furnace throat; In channel, be inserted with diameter and be 30 millimeters iron rod; At this moment insulation cover on zinc pot upper cover again lets the zinc pot slowly cool off, and rises molten then again.
3. the zinc pot of hot-dip aluminizing zincium steel plate production line according to claim 2 directly plays melting method; It is characterized in that adding the described first time aluminium zinc; One of little aluminium zinc ingot metal with 10～20 kilogram weights connects one filling, and makes aluminium zinc ingot metal upper surface be in 50 millimeter under the furnace throat; Change the heating lid of a strip resistance silk, play the stove baking according to following requirement: in ℃ interval, room temperature～150,15 ℃/hour of heat-up rates were 150 ℃ of insulations 48 hours; In 151 ℃～250 ℃ intervals, 10 ℃/hour of heat-up rates, insulation is 24 hours in the time of 250 ℃; In 251 ℃～350 ℃ intervals, 10 ℃/hour of heat-up rates, insulation is 48 hours in the time of 350 ℃; In 351 ℃～460 ℃ intervals, 10 ℃/hour of heat-up rates, insulation is 72 hours in the time of 460 ℃; When furnace temperature reaches 460 ℃, at this moment carry out adding aluminium zinc the second time, add about about 2 tons, after guaranteeing molten aluminium zinc; Aluminium zinc liquid surpasses furnace throat and is as the criterion, and after these 2 tons of aluminium zinc fusings, inductor is carried out low power sent electrically heated one day by the time; Send 1/6 of the given maximum capacity of electric weight, treat that aluminium zinc in the channel all after the fusing, extracts iron rod; Just can transfer superpower heating to, second day be that 1/3, the three day of total volume is 2/3 of a total volume; After treating insulation in 460 ℃, 72 hours, arrive 520 ℃, can in the zinc pot, add big aluminium zinc ingot metal fast with 15 ℃/hour heat-up rates; When treating aluminium zinc liquid level, clean out the table slag on aluminium zinc liquid surface, quicken then to add big aluminium zinc ingot metal, make 12 millimeters of aluminium zinc liquid level surges, flood the stove nose apart from 6 millimeters in stove nose.
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| CN2010102908535A CN101988178B (en) | 2010-09-21 | 2010-09-21 | Direct melting method for zinc pot of hot dipped aluminum-zinc steel sheet production line |
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| CN101988178B true CN101988178B (en) | 2012-08-08 |
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| CN111349877B (en) * | 2018-12-24 | 2022-03-29 | 新疆八一钢铁股份有限公司 | Control method for accurate and stable zinc liquid components during melting of zinc |
| CN114540736A (en) * | 2022-03-01 | 2022-05-27 | 新疆八一钢铁股份有限公司 | Full-process thin coating zinc liquid control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718491A (en) * | 2009-12-14 | 2010-06-02 | 洛阳双瑞达特铜有限公司 | Process method for reopening old furnace of cored line-frequency induction electric furnace for producing copper-nickel alloy |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718491A (en) * | 2009-12-14 | 2010-06-02 | 洛阳双瑞达特铜有限公司 | Process method for reopening old furnace of cored line-frequency induction electric furnace for producing copper-nickel alloy |
Non-Patent Citations (3)
| Title |
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| 仲海峰等.热镀锌锅性能及其使用维护.《金属制品》.2002,第28卷(第2期),51-53. * |
| 熊泽民等.工频有心感应炉的送配电方案.《工业加热》.2000,(第1期),51-54. * |
| 童建新.有心感应熔锌炉起熔方案的一种计算方法.《工业加热》.2001,(第5期),48-52. * |
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