1. heat installed in the production of low-carbon ferromanganese producer in 1974 hot charging method of low carbon manganese iron test on our 3500KVA refining furnace factory, the success of the country, and later formalized into full production after a perfect preparation . The plant with a submerged arc furnace using 16500KVA closed rotary refining furnace 3500KVA cooperates with the submerged arc furnace production of silicon manganese alloy heat blended manganese slag refining furnace is condensed in the low-carbon ferromanganese production, the crushing-product Produced in manganese silicon alloy.
In the actual operation, in order to protect the furnace lining and improve the utilization efficiency of the electric heating energy, after the furnace of the last furnace is completed, the furnace body is rotated, and the surrounding material of the furnace wall is quickly removed. Then adjust the rotation speed, start the feeder to the fabric in the furnace, the charge to the edge of the furnace wall is mainly lime, and the charge to the central area is mainly manganese ore. After the cloth is finished, the material surface between the electrode and the furnace wall should have a concave ring. While waiting for the liquid manganese-silicon alloy to be blended, the furnace waste heat is used to preheat the charge.
After the liquid manganese silicon alloy is weighed, the furnace body is rotated and the alloy liquid is mixed to make the alloy liquid convectively uniform in the concave ring. Then, the electrode is discharged and the adjusting material is added. After the furnace material is substantially melted near the center of the circle, the furnace body is rotated again, and the melting of the surrounding charge is accelerated under the external mechanical stirring to accelerate the desiliconization reaction; After the clearing, the silicon content of the alloy was sampled and judged and passed out. The slag alkalinity of the medium manganese slag should be controlled at 1.1~1.3, and the Mn content in the slag is about 22%.
Compared with the cold-packing method, the hot-packing method has the following advantages:
(1) The smelting time is shortened, and the smelting power consumption is reduced. Since the manganese-silicon alloy is mixed in a liquid form, the time required for remelting the manganese-silicon alloy is eliminated, and the electric energy required for the temperature rise of the charge is reduced by preheating the charge, and the hot-packing method shortens the smelting electricity time by more than 15 minutes than the cold-packing method. Reduce the smelting power consumption by about 50%.
(2) The daily output of the furnace can be increased by about 25% compared with the cold loading method.
(3) The liquid manganese-silicon alloy is hot-filled into the furnace, which simplifies the processes of slag casting, casting, finishing and processing after the manganese-silicon alloy is discharged, improves the metal yield of the manganese-silicon alloy, reduces the labor intensity of the workers, and reduces the labor intensity. Production costs.
The advantages of the hot-packing method are obvious. The shortcoming is that the problem of high residual manganese in the slag cannot be solved. Even with the high alkalinity slag operation, the slag manganese is between 12% and 18%. A slightly lower slag basicity is usually used, and the by-produced non-powdered medium manganese slag is applied to the production of manganese silicon alloy.
2. The cold-packing method for producing medium-low-carbon ferromanganese cold-packing method is a traditional method for producing medium-low-carbon ferromanganese. The refining furnace used in it is mostly transformed from a steel-making electric arc furnace, that is, a tilting graphite electrode refining furnace. The smelting process of low-carbon ferromanganese is divided into five stages: furnace, arc ignition, feeding, refining and ingot casting.
After the former furnace iron is finished, the iron outlet is blocked. After the furnace is completed, the residual slag iron is used to start the arc, and then the mixture is added into the furnace to melt the charge at full load. After the furnace material is melted by 60%~70%, the unmelted charge around the furnace wall is pushed to the core and the electrode by the tool. After the charge is basically melted, the smelting enters the refining period. In order to accelerate the desiliconization and shorten the refining time, it is necessary to stir the molten pool, and regularly sample the molten silicon from the molten pool to determine the silicon content of the alloy. After the alloy is qualified, it can be discharged.
The tapping iron is made of a large-volume ladle, and the slag and the molten iron are all charged at one time. After the molten iron is poured into the ladle, the kinetic conditions formed by the slag flushing are further desiliconized to reduce the silicon content of the product. The slag iron in the furnace should not be cleaned. A person should be left to facilitate the arc start of the next furnace to protect the refractory brick lining of the furnace bottom.
Due to the multiple solid phase transformation and the corresponding true density change during the cooling process of medium and low carbon ferromanganese, in order to reduce the excessive internal stress caused by rapid cooling, the product is severely fragmented, and it needs to be cast by cap slag; the depth of ingot casting is used. Should not exceed 300mm, otherwise the alloy at the center will be too slow due to slow cooling, solidification segregation will cause impurities to enrich, and serious product will be scrapped.
The alkalinity of slag used in smelting is related to the grade of manganese ore in the furnace. When the manganese content of the manganese ore in the furnace is less than 40%, the slag alkalinity operation of n(CaO)/n(SiO 2 )=1.4~1.6 is often used, and the manganese content in the slag is 15%~18%; The amount of Mn contained in the manganese ore is relatively high. In the range of 40% to 50%, a slightly lower slag basicity n(CaO)/n(SiO 2 )=1.0~1.3 is often used, so that the medium manganese slag is not low. Powdering, the manganese content in the slag is also correspondingly improved, and can be used for the production of manganese silicon alloy.
The production of medium-low carbon ferromanganese by graphite electrode refining furnace has simple process control process, small investment in production and preparation, easy operation, easy electrode treatment, less impact on product quality, low carbonization of alloy, suitable for small and medium-sized Business use. The electricity consumption of low-carbon ferromanganese using high slag alkalinity is 1400~1800KWh/t, and the unit power consumption of producing low-carbon ferromanganese by using slightly lower slag alkalinity to smelt non-pulverized medium-manganese slag is about 1100~ 1200KVh/t.
When calculating the ingredients, consider Mn, Fe, P, C100% in the manganese-silicon alloy into the alloy, Si into the alloy 6%, the utilization rate of Si is 75%; Mn35%~40% in the manganese ore is alloyed, 10% volatilization, P70% into the alloy. The mining cost is about 1100~1300kg/t, the consumption of manganese-silicon alloy is 950~1100kg/t, and the lime consumption is about 800~1200kg/t.
In the actual operation, in order to protect the furnace lining and improve the utilization efficiency of the electric heating energy, after the furnace of the last furnace is completed, the furnace body is rotated, and the surrounding material of the furnace wall is quickly removed. Then adjust the rotation speed, start the feeder to the fabric in the furnace, the charge to the edge of the furnace wall is mainly lime, and the charge to the central area is mainly manganese ore. After the cloth is finished, the material surface between the electrode and the furnace wall should have a concave ring. While waiting for the liquid manganese-silicon alloy to be blended, the furnace waste heat is used to preheat the charge.
After the liquid manganese silicon alloy is weighed, the furnace body is rotated and the alloy liquid is mixed to make the alloy liquid convectively uniform in the concave ring. Then, the electrode is discharged and the adjusting material is added. After the furnace material is substantially melted near the center of the circle, the furnace body is rotated again, and the melting of the surrounding charge is accelerated under the external mechanical stirring to accelerate the desiliconization reaction; After the clearing, the silicon content of the alloy was sampled and judged and passed out. The slag alkalinity of the medium manganese slag should be controlled at 1.1~1.3, and the Mn content in the slag is about 22%.
Compared with the cold-packing method, the hot-packing method has the following advantages:
(1) The smelting time is shortened, and the smelting power consumption is reduced. Since the manganese-silicon alloy is mixed in a liquid form, the time required for remelting the manganese-silicon alloy is eliminated, and the electric energy required for the temperature rise of the charge is reduced by preheating the charge, and the hot-packing method shortens the smelting electricity time by more than 15 minutes than the cold-packing method. Reduce the smelting power consumption by about 50%.
(2) The daily output of the furnace can be increased by about 25% compared with the cold loading method.
(3) The liquid manganese-silicon alloy is hot-filled into the furnace, which simplifies the processes of slag casting, casting, finishing and processing after the manganese-silicon alloy is discharged, improves the metal yield of the manganese-silicon alloy, reduces the labor intensity of the workers, and reduces the labor intensity. Production costs.
The advantages of the hot-packing method are obvious. The shortcoming is that the problem of high residual manganese in the slag cannot be solved. Even with the high alkalinity slag operation, the slag manganese is between 12% and 18%. A slightly lower slag basicity is usually used, and the by-produced non-powdered medium manganese slag is applied to the production of manganese silicon alloy.
2. The cold-packing method for producing medium-low-carbon ferromanganese cold-packing method is a traditional method for producing medium-low-carbon ferromanganese. The refining furnace used in it is mostly transformed from a steel-making electric arc furnace, that is, a tilting graphite electrode refining furnace. The smelting process of low-carbon ferromanganese is divided into five stages: furnace, arc ignition, feeding, refining and ingot casting.
After the former furnace iron is finished, the iron outlet is blocked. After the furnace is completed, the residual slag iron is used to start the arc, and then the mixture is added into the furnace to melt the charge at full load. After the furnace material is melted by 60%~70%, the unmelted charge around the furnace wall is pushed to the core and the electrode by the tool. After the charge is basically melted, the smelting enters the refining period. In order to accelerate the desiliconization and shorten the refining time, it is necessary to stir the molten pool, and regularly sample the molten silicon from the molten pool to determine the silicon content of the alloy. After the alloy is qualified, it can be discharged.
The tapping iron is made of a large-volume ladle, and the slag and the molten iron are all charged at one time. After the molten iron is poured into the ladle, the kinetic conditions formed by the slag flushing are further desiliconized to reduce the silicon content of the product. The slag iron in the furnace should not be cleaned. A person should be left to facilitate the arc start of the next furnace to protect the refractory brick lining of the furnace bottom.
Due to the multiple solid phase transformation and the corresponding true density change during the cooling process of medium and low carbon ferromanganese, in order to reduce the excessive internal stress caused by rapid cooling, the product is severely fragmented, and it needs to be cast by cap slag; the depth of ingot casting is used. Should not exceed 300mm, otherwise the alloy at the center will be too slow due to slow cooling, solidification segregation will cause impurities to enrich, and serious product will be scrapped.
The alkalinity of slag used in smelting is related to the grade of manganese ore in the furnace. When the manganese content of the manganese ore in the furnace is less than 40%, the slag alkalinity operation of n(CaO)/n(SiO 2 )=1.4~1.6 is often used, and the manganese content in the slag is 15%~18%; The amount of Mn contained in the manganese ore is relatively high. In the range of 40% to 50%, a slightly lower slag basicity n(CaO)/n(SiO 2 )=1.0~1.3 is often used, so that the medium manganese slag is not low. Powdering, the manganese content in the slag is also correspondingly improved, and can be used for the production of manganese silicon alloy.
The production of medium-low carbon ferromanganese by graphite electrode refining furnace has simple process control process, small investment in production and preparation, easy operation, easy electrode treatment, less impact on product quality, low carbonization of alloy, suitable for small and medium-sized Business use. The electricity consumption of low-carbon ferromanganese using high slag alkalinity is 1400~1800KWh/t, and the unit power consumption of producing low-carbon ferromanganese by using slightly lower slag alkalinity to smelt non-pulverized medium-manganese slag is about 1100~ 1200KVh/t.
When calculating the ingredients, consider Mn, Fe, P, C100% in the manganese-silicon alloy into the alloy, Si into the alloy 6%, the utilization rate of Si is 75%; Mn35%~40% in the manganese ore is alloyed, 10% volatilization, P70% into the alloy. The mining cost is about 1100~1300kg/t, the consumption of manganese-silicon alloy is 950~1100kg/t, and the lime consumption is about 800~1200kg/t.
Goodsense Electric Tour Bus advantages:
1.It adoptes most advanced electric power steering system to make steering more flexible,which makes daily operating easier.
2.Macpherson independently suspension system,ensure the easy driving and comfortable seat.
3.Equip with alarm lamp,megaphone and tool box to provide convenience for patrol.
4.Two-channel hydraulic braking system to improve the driving safety.
5.Beautiful wide-view laminated glass.
|
General |
|
|
|
|
Model |
|
GD04 |
|
|
Power Type |
|
Electric |
|
|
Operate Type |
|
Seated |
|
|
Service Weight |
kg |
750 |
|
|
Overall Dimension |
|
|
|
|
Dimension |
L×W×T |
mm |
3000×1400×1950 |
|
Min Ground Clearance |
mm |
140 |
|
|
Wheelbase |
mm |
2050 |
|
|
Wheel Track Front/Rear |
mm |
1160/1150 |
|
Application Area:
1.Enterprise
2.Park
3.Community
4.School
5.Airport
6.Port
If you have any other questions,please contact us directly.Our product are all with high quality.And we invite you to visit our factory.
Electric Vehicle,Outdoor Vehicle,Green City Electric Vehicle,Mini Electric Vehicle
ZHEJIANG GOODSENSE FORKLIFT CO.,LTD , https://www.dieselforklift.nl