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A special drainage sand for high manganese and high aluminum steel and its application method

A technology for draining sand and high-aluminum steel, applied in the direction of manufacturing tools, casting melt containers, casting equipment, etc., can solve the problems of rising production costs and high prices, and achieve the effects of cost reduction, cost control, and risk reduction

Active Publication Date: 2021-09-24
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, alumina sand is expensive compared to chromite sand, and its large-scale use will lead to an increase in production costs

Method used

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  • A special drainage sand for high manganese and high aluminum steel and its application method

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Embodiment 1

[0029] A special drainage sand for high manganese and high aluminum steel and its application method, such as figure 1 shown. The present embodiment is applied to a 120-ton ladle to produce the technological process of 20Mn23AlV.

[0030] Such as figure 1 As shown, after the ladle has been used for one heat, the lower nozzle, slide plate and upper nozzle are cleaned by burning oxygen; the oxygen blowing pipe is aligned with the nozzle and pushed in parallel to clean the cold steel and residue in the nozzle for 3 minutes about. Lift the ladle with the nozzle cleaned to the ladle car, transport the ladle to the drainage sand installation platform through the ladle car, close the sliding nozzle, install the conduit through the drainage sand, add the chrome drainage sand to the ladle nozzle block, The chrome drainage sand, Cr 2 o 3 =40%, Al 2 o 3 =10%, SiO 2 =20%, Fe 2 o 3 = 25%, MgO = 5%, sand size: 0.1-1mm, of which 15% are in the range of 0.1-0.3mm, 60% are in the ran...

Embodiment 2

[0032] A special drainage sand for high manganese and high aluminum steel and its application method, such as figure 1 shown. This embodiment is applied to an 80-ton ladle to produce the technological process of X35Mn18.

[0033] Such as figure 1As shown, after the ladle is used for one heat, the ladle is maintained, the ladle with the nozzle cleaned is hoisted to the ladle car, and the ladle is transported to the drainage sand installation platform by the ladle car, the sliding nozzle is closed, and the drainage sand is added. Install the conduit, add chrome drainage sand to the ladle nozzle seat brick, the chromium drainage sand, Cr 2 o 3 =35%, Al 2 o 3 = 7%, SiO 2 =25%, Fe 2 o 3 = 25%, MgO = 8%, sand size: 0.1-1mm, of which 20% are in the range of 0.1-0.3mm, 60% are in the range of 0.3-0.7mm, and 0.7- Particles in the 1mm range accounted for 20%. Fill the chrome drainage sand until the upper surface is 3-7cm lower than the top of the nozzle block. After filling th...

Embodiment 3

[0035] A special drainage sand for high manganese and high aluminum steel and its application method, such as figure 1 shown. The present embodiment is applied to a 100-ton ladle to produce the technological process of X120Mn12.

[0036] Such as figure 1 As shown, after the ladle is used for one heat, the ladle is maintained, the ladle with the nozzle cleaned is hoisted to the ladle car, and the ladle is transported to the drainage sand installation platform by the ladle car, the sliding nozzle is closed, and the drainage sand is added. Install the conduit, add chrome drainage sand to the ladle nozzle seat brick, the chromium drainage sand, Cr 2 o 3 =30%, Al 2 o 3 =12%, SiO 2 =28%, Fe 2 o 3 = 20%, MgO = 10%, sand size: 0.1-1mm, of which 30% are in the range of 0.1-0.3mm, 60% are in the range of 0.3-0.7mm, and 60% are in the range of 0.7-0.7mm Particles in the 1mm range accounted for 10%. Fill the chrome drainage sand until the upper surface is 3-7cm lower than the to...

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Abstract

The invention belongs to the field of iron and steel metallurgy, and discloses a special drainage sand for high manganese and high aluminum steel and a use method thereof. The upper layer of the special drainage sand is an alumina granular layer, and the lower layer is a chrome drainage sand layer. Compared with chromium drainage sand, the reactivity of alumina particles with high-manganese and high-aluminum steel is relatively weak, forming a moderate sintered layer, improving the automatic casting rate of high-manganese and high-aluminum steel ladle, and then improving the high-manganese and high-aluminum steel production efficiency. The automatic pouring rate of the ladle is increased to reduce the number of inclusions in the steel due to the oxygen burning process, which improves the quality of high manganese and high aluminum steel products. The cost of alumina particles in the upper layer of the drainage sand is 3 to 5 times that of the chrome drainage sand in the lower layer. In the present invention, the thickness of the alumina particles used in the upper layer is only 3 to 7 cm, and the use of chrome drainage sand in the lower layer instead of alumina particles greatly reduces the cost . The operation of burning oxygen in the ladle is very dangerous. Using special drainage sand for high manganese and high aluminum steel reduces the probability that the ladle will not start pouring automatically, thereby reducing the risk in the production process of high manganese steel.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and relates to refining and continuous casting, in particular to high manganese and high aluminum steel drainage sand and its use method. Background technique [0002] High-manganese and high-aluminum steel has high strength, excellent plasticity, toughness, work hardening performance and impact resistance safety, and has high strength and plasticity and low density. Due to these advantages, high manganese and high aluminum steels have good application prospects in the fields of marine engineering and military industry. In addition, it meets the requirements of lightweight, environmental friendliness and safety in the field of automobile manufacturing. High-efficiency production of high-manganese and high-aluminum steel has attracted much attention. The contents of manganese and aluminum elements in high manganese and high aluminum steel are very high, generally w(Mn)>5%, w(Al)>1%...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/46C04B35/101C04B35/12C04B35/66
CPCB22D41/46C04B35/101C04B35/12C04B35/66C04B2235/3206C04B2235/3217C04B2235/3272C04B2235/3418
Inventor 邓志银宋国栋刘宗辉杨博然朱苗勇
Owner NORTHEASTERN UNIV LIAONING
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