CN104827019A - Ladle automatic drainage device - Google Patents
Ladle automatic drainage device Download PDFInfo
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Abstract
The invention provides a ladle automatic drainage device, and belongs to the technical field of a drainage device in iron and steel smelting. The ladle automatic drainage device comprises a cylinder body and drainage material which has a single-layer or multilayer structure. The cylinder body is a prefabricated thin-wall steelwork. The top part of the cylinder body is sealed by adopting prefabricated thin-wall steel. The bottom part of the cylinder body is sealed by adopting hard low temperature melted plastics. The ladle automatic drainage device is novel in structure, easy to operate and high in automatic drainage efficiency so that a non-self-open drainage phenomenon caused by a water port cleaning problem can be completely avoided, in-tube drainage sand is not liable to be affected by damp and is not liable to be polluted by other material in ladle to affect self-open rate, and thus labor force is saved, stability performance is great and use is safe.
Description
Technical field
The invention belongs to ladle draining technical field, be specifically related to a kind of automatic ladle drainage device.
Background technology
Ladle draining is the key technology in smelting iron and steel, and traditional method generally adopts ladle nozzle to fill stuffing sand and opens water to realize drainage, is called as sand replacement method.Then need when stuffing sand fails automatic jet to burn with oxygen rifle to blow, carry out pressure and open and water, but oxygen enrichment burns and blows and can increase Oxygen Content in Liquid Steel, causes steel demote, blow overlong time or burning if burn and blow open and water unsuccessfully, then can cause producing termination.So automatic jet rate evaluates the important indicator of drainage agent quality.The stuffing sand of function admirable, high automatic jet rate can realize the cast of continuous casting overall process full guard, guarantees that continuous casting production system is smooth.
Traditional sand replacement method drainage is opened and is watered current ubiquitous problem mainly casting rate poor stability, fills with sand complex process, and execute-in-place is difficult to grasp, and labor strength is large, and cost is high.Automatic jet rate is subject to on-the-spot various factors, mainly comprises following aspect:
I: ladle nozzle is not cleaned out, have slag residual wherein, after filling with sand, residual slag and stuffing sand mixing, be bonded together by molten steel heat effect, and the blocking mouth of a river causes drainage failure;
II: when stuffing sand fills with sand, enough could not form intact arc sand-flood, or arc sand-flood is thrown in the factors disrupt such as alloy, cause drainage failure;
III: without pipeline introduction method, limit by field condition, add sand technique by simple hand throwing method and drainage rate also can be caused to reduce;
IV: the refining of overlength treats that the steel time causes drainage rate to reduce;
V: stuffing sand makes moist or the reason such as contaminated causes the change of stuffing sand serviceability.
After all, it is many that the sand replacement method of traditional ladle draining does not open the influence factor of watering, casting rate poor stability.
Summary of the invention
Technical problem to be solved by this invention is, for the above-mentioned deficiency of prior art, provides a kind of casting rate high, good stability, simplifies operation, simple to operate, the automatic ladle drainage device of labor and material saving.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: automatic ladle drainage device, comprise cylindrical shell and drainage material, described drainage material is single or multiple lift structure, described cylindrical shell is prefabricated thin-wall steelwork, the top of described cylindrical shell adopts the sealing of prefabricated thin-wall steel, and the bottom of described cylindrical shell adopts hard low temperature to melt plastic closures.
The overall diameter of described cylindrical shell is less than the interior diameter of ladle nozzle 0.1 ~ 3 millimeter.
The aspect ratio ladle bottom of described cylindrical shell exceeds 100 ~ 300 millimeters.
When described drainage material is single layer structure, described drainage material is made up of the chrome ore of 50 ~ 95 weight portions, the silica sand of 5 ~ 50 weight portions, the carbon black being not more than 3 weight portions and/or graphite.
When described drainage material is sandwich construction, described drainage material is from top to bottom followed successively by Fast Sintering anti-molten steel infiltration layer of sand, the anti-molten steel infiltration layer of sand of slow sintering and the quick drifting sand layer of alkaline material.
Described Fast Sintering anti-molten steel infiltration layer of sand is made up of the chrome ore of 60 ~ 90 weight portions, the silica sand of 10 ~ 40 weight portions, the carbon black being not more than 2 weight portions and/or graphite; Described slow sintering anti-molten steel infiltration layer of sand is made up of the chrome ore of 60 ~ 90 weight portions, the silica sand of 10 ~ 40 weight portions, the carbon black being not more than 8 weight portions and/or graphite; The quick drifting sand layer of described alkaline material is magnesian sand or calcareous material sand.
The granularity of described chrome ore is 20 ~ 80 orders.
The granularity of described silica sand is 0.2 ~ 2 millimeter.
The granularity of described magnesian sand or calcareous material sand is 0.3 ~ 3 millimeter.
Wherein, the preparation method of above-mentioned drainage material is existing routine techniques.
The using method of automatic ladle drainage device of the present invention is, first ladle nozzle cleaned out and install slide plate, then this device is inserted ladle nozzle, close slide plate, can tap and smelt, smelt the complete ladle that hangs to continuous casting station, open slide plate, the plastic closures of this bottom of device is melted, and stuffing sand flows out, the sinter layer that the top that the static pressure of ladle crushes this device is sintered by molten steel, realizes automatic jet.
In addition, the size design of cylindrical shell meets following requirement: the height of cylindrical shell exceeds 100 ~ 300 millimeters, the bottom of ladle, the overall diameter of cylindrical shell is less than the interior diameter of ladle nozzle 0.1 ~ 3 millimeter, guarantees that cylindrical shell can smoothly and closely insert the mouth of a river and be as the criterion from the bottom of ladle.When cylindrical shell injects mouth of a river closedown slide plate, cylindrical shell exceeds ladle bottom 100 ~ 300 millimeters.
The mechanism of action of drainage material is: molten steel injects the initial stage of ladle, and the drainage material inserting mouth of a river upper surface sinters rapidly and hinders the infiltration of molten steel, and sinter layer can bear the static pressure of molten steel and not destroy under the support of bottom material; Simultaneously the sintering velocity of material is slack-off, and sinter layer remains on certain thickness, and the non-sintered material opening bottom when watering falls because of Gravitative Loads, and sinter layer loses support, causes sinter layer broken under the static pressure effect of molten steel, and realization is opened and watered.Simultaneously, research shows, the structure etc. of the particle composition of ladle draining material, grain shape, material, using method and filling pipe end is all directly connected to the height of automatic casting ratio, and the height of automatic casting ratio is related to the quality of the personal safety of workman, labour intensity, production efficiency and steel, obviously, higher automatic casting ratio is kept to have great importance.
For the many factors affecting ladle automatic free-opening rate, the present invention mainly proposes all the measure improving ladle nozzle self-opening rate from the following aspects.
One is the improvement of drainage system, adopts automatic drainage device of the present invention, can be reinforced according to the adjustment of ladle nozzle position, improves reinforced precision, reduces the consumption of stuffing sand, improve the working environment of operator, improve the automatic casting ratio of ladle.Meanwhile, present invention employs the sealing completely of top and bottom, the stuffing sand in cylindrical shell can be avoided to make moist or pollute, ensure the stable of its performance.
Two is stuffing sand composition and the improvement of proportioning, selects suitable stuffing sand to improve casting rate.Drainage material of the present invention composition and formula are through that long-term practical experience explores out, top layer Fast Sintering can be reached, prevent stuffing sand from floating while can avoid excess agglomeration again.Drainage material in automatic ladle drainage device of the present invention is based on chrome ore, be equipped with silica sand and/or additive (carbon materials), wherein, it is high that chrome ore has refractoriness, unit weight is large, good fluidity, flow velocity is fast, unduly sinters, the feature that steel grade is adaptable, research find when chrome ore and silica sand, carbon black and/or graphite in the proper ratio and combination of particle size uses time, secondary spinel is more obvious, and make sinter layer have better fragility, apparent porosity is high, anti-infiltration of molten steel ability is strong, and sintering character is more excellent.When lower skateboard is in an open position, the deadweight of drainage material falls, and sinter layer broken shell under ferrostatic pressure goes downstream, and reaches automatic casting.
Three is the reasonably combined of stuffing sand grain graininess, and the grain graininess of stuffing sand is crossed conference and caused mobility to be deteriorated, and rough particle also can produce scaffold phenomenon, and stuffing sand can not be flowed down completely.The present invention adopts granularity to be 20 ~ 80 object chrome ores, is equipped with the silica sand of 0.2 ~ 2 millimeter, significantly improves automatic casting ratio in practice.
Compared with prior art, the invention has the beneficial effects as follows: novel structure of the present invention, cost is low; Simplified flowsheet, simple to operate; Automatic jet efficiency is high; Save labour, improve operating environment; Avoid nozzle blocking completely, stuffing sand is moisture-sensitive or pollution not, and stability is good, realizes the cast of continuous casting overall process full guard, guarantees the trouble-free operation of continuous casting production system.
Accompanying drawing explanation
Fig. 1: the structural representation of the embodiment of the present invention 1;
Fig. 2: the structural representation of the embodiment of the present invention 5;
Wherein, 1-cylindrical shell, 2-Fast Sintering anti-molten steel infiltration layer of sand, 3-sinters anti-molten steel infiltration layer of sand slowly, and the quick drifting sand layer of 4-alkalescence material, 5-hard low temperature melts plastic closures.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
Automatic ladle drainage device of the present invention, comprise cylindrical shell 1 and drainage material, described drainage material is single layer structure, and described cylindrical shell 1 is made up of prefabricated thin-wall steel, the top of described cylindrical shell 1 adopts the sealing of prefabricated thin-wall steel, and the bottom of described cylindrical shell 1 adopts hard low temperature to melt plastic closures 5.
Concrete, described drainage material is made up of the silica sand of the chrome ore of 50.1 weight portions, 48.5 weight portions, the carbon black of 1.4 weight portions and/or graphite.Wherein, the granularity of described chrome ore is 20 ~ 80 orders; The granularity of described silica sand is 0.2 ~ 2 millimeter.The preparation method of above-mentioned drainage material is existing routine techniques.
In addition, the size design of cylindrical shell 1 meets following requirement: the height of cylindrical shell 1 exceeds 100 ~ 300 millimeters, the bottom of ladle, the overall diameter of cylindrical shell 1 is less than the interior diameter of ladle nozzle 0.1 ~ 3 millimeter, guarantees that cylindrical shell 1 can smoothly and closely insert the mouth of a river and be as the criterion from the bottom of ladle.When cylindrical shell 1 injects mouth of a river closedown slide plate, cylindrical shell 1 exceeds ladle bottom 100 ~ 300 millimeters.
The using method of this device is, first ladle nozzle cleaned out and install slide plate, then this device is inserted ladle nozzle, close slide plate, can tap and smelt, smelt the complete ladle that hangs to continuous casting station, open slide plate, the plastic closures of this bottom of device is melted, and stuffing sand flows out, the sinter layer that the top that the static pressure of ladle crushes this device is sintered by molten steel, realizes automatic jet.
The automatic ladle drainage device of the present embodiment uses in certain A steel mill, and statistics stove number is 1007 stoves; Opening and watering stove number is 1005 stoves, and automatic casting ratio is 99.8%, treats that the steel time is 2.5 ~ 3 hours.
Embodiment 2
The apparatus structure of the present embodiment is with embodiment 1, and difference is: described drainage material is made up of the silica sand of the chrome ore of 94.5 weight portions, 5.2 weight portions, the carbon black of 0.3 weight portion and/or graphite.The granularity of described chrome ore is 20 ~ 80 orders.The granularity of described silica sand is 0.2 ~ 2 millimeter.
The preparation method of described drainage material is existing routine techniques.Its using method and dimensional requirement, with embodiment 1, repeat no more.
The automatic ladle drainage device of the present embodiment uses in certain B steel mill, and statistics stove number is 1012 stoves; Opening and watering stove number is 1010 stoves, and automatic casting ratio is 99.8%, treats that the steel time is 2.5 ~ 3 hours.
Embodiment 3
The apparatus structure of the present embodiment is with embodiment 1, and difference is: described drainage material is made up of the silica sand of the chrome ore of 70.8 weight portions, 26.2 weight portions, the carbon black of 3.0 weight portions and/or graphite.The granularity of described chrome ore is 20 ~ 80 orders.The granularity of described silica sand is 0.2 ~ 2 millimeter.
Wherein, the preparation method of described drainage material is according to existing routine techniques.Its using method and dimensional requirement, with embodiment 1, repeat no more.
The automatic ladle drainage device of the present embodiment uses in certain A steel mill, and statistics stove number is 1007 stoves; Opening and watering stove number is 1007 stoves, and automatic casting ratio is 100%, treats that the steel time was more than 3 hours.
Embodiment 4
The apparatus structure of the present embodiment is with embodiment 1, and difference is: described drainage material is made up of the silica sand of the chrome ore of 62.7 weight portions, 35.2 weight portions, the carbon black of 2.1 weight portions and/or graphite.The granularity of described chrome ore is 20 ~ 80 orders.The granularity of described silica sand is 0.2 ~ 2 millimeter.The granularity of described magnesian sand or calcareous material sand is 0.3 ~ 3 millimeter.
Wherein, the preparation method of described drainage material is according to existing routine techniques.Its using method and dimensional requirement, with embodiment 1, repeat no more.
The automatic ladle drainage device of the present embodiment uses in certain C steel mill, and statistics stove number is 1023 stoves; Opening and watering stove number is 1022 stoves, and automatic casting ratio is 99.9%, treats that the steel time is 3 hours.
Embodiment 5
As shown in Figure 2, automatic ladle drainage device of the present invention, comprises cylindrical shell 1 and drainage material, described drainage material is sandwich construction, described cylindrical shell is made up of prefabricated thin-wall steel, and the top of described cylindrical shell 1 adopts the sealing of prefabricated thin-wall steel, and the bottom of described cylindrical shell 1 adopts hard low temperature to melt plastic closures 5.Wherein, described drainage material is from top to bottom followed successively by Fast Sintering anti-molten steel infiltration layer of sand 2, the anti-molten steel infiltration layer of sand 3 of slow sintering and the quick drifting sand layer 4 of alkaline material.
Described Fast Sintering anti-molten steel infiltration layer of sand is made up of the silica sand of the chrome ore of 60.5 weight portions, 39.5 weight portions, the carbon black of 0 weight portion and/or graphite; Described slow sintering anti-molten steel infiltration layer of sand is made up of the silica sand of the chrome ore of 60.8 weight portions, 38.2 weight portions, the carbon black of 1.0 weight portions and/or graphite; The quick drifting sand layer of described alkaline material is magnesian sand or calcareous material sand.Wherein, the granularity of described chrome ore is 20 ~ 80 orders.The granularity of described silica sand is 0.2 ~ 2 millimeter.The granularity of described magnesian sand or calcareous material sand is 0.3 ~ 3 millimeter.
Wherein, the preparation method of above-mentioned Fast Sintering anti-molten steel infiltration layer of sand 2, the anti-molten steel infiltration layer of sand 3 of slow sintering and the quick drifting sand layer of alkaline material 4 is according to existing routine techniques.Its using method and dimensional requirement, with embodiment 1, repeat no more.
The automatic ladle drainage device of the present embodiment uses in certain A steel mill, and statistics stove number is 1007 stoves; Opening and watering stove number is 1007 stoves, and automatic casting ratio is 100%, treats that the steel time is 3 hours.
Embodiment 6
The apparatus structure of the present embodiment is with embodiment 5, and difference is: described Fast Sintering anti-molten steel infiltration layer of sand is made up of the silica sand of the chrome ore of 87.9 weight portions, 10.1 weight portions, the carbon black of 2 weight portions and/or graphite; Described slow sintering anti-molten steel infiltration layer of sand is made up of the silica sand of the chrome ore of 87.0 weight portions, 10.8 weight portions, the carbon black of 1.2 weight portions and/or graphite; The quick drifting sand layer of described alkaline material is magnesian sand or calcareous material sand.The granularity of described chrome ore is 20 ~ 80 orders.The granularity of described silica sand is 0.2 ~ 2 millimeter.The granularity of described magnesian sand or calcareous material sand is 0.3 ~ 3 millimeter.
The preparation method of the anti-molten steel infiltration layer of sand 3 of above-mentioned Fast Sintering anti-molten steel infiltration layer of sand 2, slow sintering and the quick drifting sand layer of alkaline material 4 is according to existing routine techniques.Its using method and dimensional requirement, with embodiment 1, repeat no more.
The automatic ladle drainage device of the present embodiment uses in certain B steel mill, and statistics stove number is 1012 stoves; Opening and watering stove number is 1011 stoves, and automatic casting ratio is 99.9%, treats that the steel time is 3 hours.
Embodiment 7
The apparatus structure of the present embodiment is with embodiment 5, and difference is: described Fast Sintering anti-molten steel infiltration layer of sand is made up of the silica sand of the chrome ore of 80.7 weight portions, 18.6 weight portions, the carbon black of 0.7 weight portion and/or graphite; Described slow sintering anti-molten steel infiltration layer of sand is made up of the silica sand of the chrome ore of 80.1 weight portions, 11.9 weight portions, the carbon black of 8 weight portions and/or graphite; The quick drifting sand layer of described alkaline material is magnesian sand or calcareous material sand.Wherein, the granularity of described chrome ore is 20 ~ 80 orders.The granularity of described silica sand is 0.2 ~ 2 millimeter.The granularity of described magnesian sand or calcareous material sand is 0.3 ~ 3 millimeter.
The preparation method of the anti-molten steel infiltration layer of sand 3 of above-mentioned Fast Sintering anti-molten steel infiltration layer of sand 2, slow sintering and the quick drifting sand layer of alkaline material 4 is according to existing routine techniques.Its using method and dimensional requirement, with embodiment 1, repeat no more.
The automatic ladle drainage device of the present embodiment uses in certain C steel mill, and statistics stove number is 1023 stoves; Opening and watering stove number is 1023 stoves, and automatic casting ratio is 100%, treats that the steel time is 3 ~ 4 hours.
Embodiment 8
The apparatus structure of the present embodiment is with embodiment 5, and difference is: described Fast Sintering anti-molten steel infiltration layer of sand is made up of the silica sand of the chrome ore of 68.5 weight portions, 31.1 weight portions, the carbon black of 0.4 weight portion and/or graphite; Described slow sintering anti-molten steel infiltration layer of sand is made up of the silica sand of the chrome ore of 68.3 weight portions, 28.5 weight portions, the carbon black of 3.2 weight portions and/or graphite; The quick drifting sand layer of described alkaline material is magnesian sand or calcareous material sand.Wherein, the granularity of described chrome ore is 20 ~ 80 orders.The granularity of described silica sand is 0.2 ~ 2 millimeter.The granularity of described magnesian sand or calcareous material sand is 0.3 ~ 3 millimeter.
The preparation method of the anti-molten steel infiltration layer of sand 3 of above-mentioned Fast Sintering anti-molten steel infiltration layer of sand 2, slow sintering and the quick drifting sand layer of alkaline material 4 is according to existing routine techniques.Its using method and dimensional requirement, with embodiment 1, repeat no more.
The automatic ladle drainage device of the present embodiment uses in certain B steel mill, and statistics stove number is 1012 stoves; Opening and watering stove number is 1012 stoves, and automatic casting ratio is 100%; Treat that the steel time was more than 4 hours, the sinter layer of formation is even and thin, moderate strength.
Embodiment 9
The apparatus structure of the present embodiment is with embodiment 5, and difference is: described Fast Sintering anti-molten steel infiltration layer of sand is made up of the silica sand of the chrome ore of 72.7 weight portions, 26.2 weight portions, the carbon black of 1.1 weight portions and/or graphite; Described slow sintering anti-molten steel infiltration layer of sand is made up of the silica sand of the chrome ore of 79.1 weight portions, 20.9 weight portions, the carbon black of 0 weight portion and/or graphite; The quick drifting sand layer of described alkaline material is magnesian sand or calcareous material sand.Wherein, the granularity of described chrome ore is 20 ~ 80 orders.The granularity of described silica sand is 0.2 ~ 2 millimeter.The granularity of described magnesian sand or calcareous material sand is 0.3 ~ 3 millimeter.
The preparation method of the anti-molten steel infiltration layer of sand 3 of above-mentioned Fast Sintering anti-molten steel infiltration layer of sand 2, slow sintering and the quick drifting sand layer of alkaline material 4 is according to existing routine techniques.Its using method and dimensional requirement, with embodiment 1, repeat no more.
The automatic ladle drainage device of the present embodiment uses in certain C steel mill, and statistics stove number is 1023 stoves; Opening and watering stove number is 1023 stoves, and automatic casting ratio is 100%, treats that the steel time is 3.5 hours.
Comparative example 1
The apparatus structure of the present embodiment is with embodiment 1, and difference is: described drainage material is made up of the crystalline flake graphite of the quartz sand of the chrome ore of 70 weight portions, 22 weight portions, the potassic feldspar of 7 weight portions and 1 weight portion.
The preparation method of described drainage material is according to existing routine techniques.Its using method, with embodiment 1, repeats no more.
The automatic ladle drainage device of the present embodiment uses in certain A steel mill, and statistics stove number is 1007 stoves; Opening and watering stove number is 991 stoves, and automatic casting ratio is 98.4%; Treat that the steel time is about 100 minutes.
Comparative example 2
The apparatus structure of the present embodiment is with embodiment 1, and difference is: described drainage material is made up of high-purity crystobalite sand of the chrome ore of 73 weight portions, 17 weight portions, the fused magnesite of 10 weight portions.
The preparation method of described drainage material is according to existing routine techniques.Its using method, with embodiment 1, repeats no more.
The automatic ladle drainage device of the present embodiment uses in certain B steel mill, and statistics stove number is 1012 stoves; Opening and watering stove number is 990 stoves, and automatic casting ratio is 97.8%; Treat that the steel time is 115 minutes.
As can be seen from above-described embodiment and comparative example, the present invention, by the combination of device and drainage material, effectively improves automatic casting ratio, and use in different steel mills, automatic casting ratio generally reaches 100%, treats the steel time generally more than 2.5 hours; And drainage material wide material sources, execute-in-place are simple, pollution-free.Drainage material of the present invention has that refractoriness is high, good, the anti-molten steel of high temperature sintering performance and slag corrosion is good, particle size distribution evenly, less, the cost-effective of good fluidity, coefficient of thermal expansion and the high feature of self-opening rate.
Claims (8)
1. automatic ladle drainage device, comprise cylindrical shell and drainage material, it is characterized in that: described drainage material is single or multiple lift structure, described cylindrical shell is prefabricated thin-wall steelwork, the top of described cylindrical shell adopts the sealing of prefabricated thin-wall steel, and the bottom of described cylindrical shell adopts hard low temperature to melt plastic closures.
2. automatic ladle drainage device as claimed in claim 1, is characterized in that: the overall diameter of described cylindrical shell is less than the interior diameter of ladle nozzle 0.1 ~ 3 millimeter.
3. automatic ladle drainage device as claimed in claim 1, is characterized in that: the aspect ratio ladle bottom of described cylindrical shell exceeds 100 ~ 300 millimeters.
4. the automatic ladle drainage device as described in any one of claim 1 ~ 3, it is characterized in that: when described drainage material is single layer structure, described drainage material is made up of the chrome ore of 50 ~ 95 weight portions, the silica sand of 5 ~ 50 weight portions, the carbon black being not more than 3 weight portions and/or graphite.
5. automatic ladle drainage device as claimed in claim 4, it is characterized in that: the granularity of described chrome ore is 20 ~ 80 orders, the granularity of described silica sand is 0.2 ~ 2 millimeter.
6. the automatic ladle drainage device as described in any one of claim 1 ~ 3, it is characterized in that: when described drainage material is sandwich construction, described drainage material is from top to bottom followed successively by Fast Sintering anti-molten steel infiltration layer of sand, the anti-molten steel infiltration layer of sand of slow sintering and the quick drifting sand layer of alkaline material.
7. automatic ladle drainage device as claimed in claim 6, is characterized in that: described Fast Sintering anti-molten steel infiltration layer of sand is made up of the chrome ore of 60 ~ 90 weight portions, the silica sand of 10 ~ 40 weight portions, the carbon black being not more than 2 weight portions and/or graphite; Described slow sintering anti-molten steel infiltration layer of sand is made up of the chrome ore of 60 ~ 90 weight portions, the silica sand of 10 ~ 40 weight portions, the carbon black being not more than 8 weight portions and/or graphite; The quick drifting sand layer of described alkaline material is magnesian sand or calcareous material sand.
8. automatic ladle drainage device as claimed in claim 7, it is characterized in that: the granularity of described chrome ore is 20 ~ 80 orders, the granularity of described silica sand is 0.2 ~ 2 millimeter, and the granularity of described magnesian sand or calcareous material sand is 0.3 ~ 3 millimeter.
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| CN106881458A (en) * | 2017-03-23 | 2017-06-23 | 张国令 | A kind of refining ladle flow diverter and preparation method thereof |
| CN108326274A (en) * | 2018-02-26 | 2018-07-27 | 首钢京唐钢铁联合有限责任公司 | A kind of process that ladle draining sand is added |
| CN110681851A (en) * | 2019-11-08 | 2020-01-14 | 鞍山市和丰耐火材料有限公司 | Compositely-thrown steel ladle chromium drainage agent with ultrahigh self-pouring rate |
| CN113979759A (en) * | 2021-11-16 | 2022-01-28 | 中天钢铁集团有限公司 | Drainage sand suitable for high-manganese steel continuous casting production and high self-opening rate and use method |
| CN114042904A (en) * | 2021-12-01 | 2022-02-15 | 山东钢铁集团日照有限公司 | Method for improving ladle self-opening rate |
| CN114247876A (en) * | 2021-12-14 | 2022-03-29 | 吉林金钢钢铁股份有限公司 | Ladle stuffing sand adding device and method |
| CN114247877A (en) * | 2021-12-03 | 2022-03-29 | 山东莱钢永锋钢铁有限公司 | Device and method for casting of square billet continuous casting tundish |
| CN114453577A (en) * | 2022-01-25 | 2022-05-10 | 北京瑞普同创科技发展有限公司 | Sizing quick-change tundish drainage rod and casting process thereof |
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