A slag stopper for ladle pouring slag stopper and its preparation and slag stopper method

A technology of slag blocking plug and plug body, which is applied in the direction of manufacturing tools, casting equipment, metal processing equipment, etc., can solve the problem that slag is not easy to control, and achieve the effect of reducing the amount of slag, simple production and strong practicability

Active Publication Date: 2016-03-02
LAIWU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the slag pouring in the ladle is not easy to control in the existing continuous casting ladle, the object of the present invention is to provide a slag stopper for ladle casting slag stopper and its preparation and slag stopper method

Method used

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  • A slag stopper for ladle pouring slag stopper and its preparation and slag stopper method
  • A slag stopper for ladle pouring slag stopper and its preparation and slag stopper method
  • A slag stopper for ladle pouring slag stopper and its preparation and slag stopper method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Raw material ratio: 10-30mm grain steel 25.1%, 5-10mm grain steel 25.2%, 3-5mm grain steel 13.8%, 0-3mm grain steel 12.8%, high alumina fine powder 13.5%, calcium aluminate Cement 9.2%, sodium tripolyphosphate 0.4%.

[0056] The preparation method is as follows:

[0057] Put granular steel, steel fine powder and high alumina fine powder of different particle grades into the mixer according to the ratio, and add refractory binder and water reducer at the same time to mix the dry material. The mixing time of the dry material is controlled at 5 to 8 minutes. Then add water to mix the wet material. The amount of water added is controlled between 6.5 and 7.5 wt% of the total weight of the raw materials. Generally, due to the influence of the water absorption of the raw materials in summer and winter, the amount of water added is slightly changed. The mixing time of the wet material is 8 to 10 minutes. After mixing, put the wet material into a special mold, vibrate and form ...

Embodiment 2

[0061] Raw material ratio: 10-30mm grain steel 24.7%, 5-10mm grain steel 25.6%, 3-5mm grain steel 13.5%, 0-3mm grain steel 13.7%, high alumina fine powder 12.6%, calcium aluminate Cement 9.4%, sodium tripolyphosphate 0.5%.

[0062] The preparation method is the same as in Example 1.

[0063] The performance indicators of the slag stopper obtained by adopting the process of this embodiment and the ratio of raw materials are shown in the following table:

[0064]

[0065]

Embodiment 3

[0067] Raw material ratio: 10-30mm grain steel 23.7%; grain steel grain size 5-10mm 27.3%; grain steel grain size 3-5mm 13.1%; grain steel grain size less than 3mm 13.2%; steel fine powder 13.4%; Binder 8.9%; water reducing agent 0.4%.

[0068] The preparation method is the same as in Example 1.

[0069] The performance indicators of the slag stopper obtained by adopting the process of this embodiment and the ratio of raw materials are shown in the following table:

[0070]

[0071] The following introduces the usage method of the slag stopper of the present invention:

[0072] After the molten steel is refined out of the station and before pouring, the slag stopper is put into the ladle above the ladle nozzle bowl. Since the inside and outside of the slag stopper are homogeneous, the bulk density is 4.0g / cm 3 , the slag stopper falls to the molten steel and slag interface under the action of gravity, and the ladle pouring process produces a vortex flow with the drop of t...

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Abstract

The invention discloses a floating plug for large-ladle pouring slag stopping, a preparation method of the floating plug for large-ladle pouring slag stopping and a slag stopping method. The floating plug is composed of a plug head part and a plug body part and prepared by mixing fireproofing materials, water reducing agents and binding agents. After molten steel is refined and leaves from a station, before pouring is carried out, the floating plug is put into a large ladle, eddy flowing generated by molten steel liquid level drawdown in the large-ladle pouring process is used, the floating plug operates to the position above a water gap bowl of the large ladle and is in point contact with the surface of the water gap bowl of the large ladle, and the slag stopping operation is accordingly completed. The interior and the exterior of the floating plug prepared with the method are homogenous, the density is even, location in the molten steel is accurate, the problem that manual judgment is inaccurate so that slag discharged from the large ladle in continuous casting production enters a middle ladle is solved, the slag stopping effect is remarkable, the slag discharging amount of the molten steel in the large-ladle pouring process is greatly reduced, the purity of the molten steel is improved, the blank casting quality is improved, and the performance of finished products of rolled metal is improved.

Description

technical field [0001] The invention relates to a ladle pouring slag control device, in particular to a slag stopper for ladle pouring slag stopper and a preparation and slag stopper method, belonging to the technical field of continuous casting in metallurgical production. Background technique [0002] At present, in the continuous casting production process, the ladle molten steel pouring operation must carry out the slag blocking operation to reduce and avoid the ladle pouring process. The ladle slag enters the tundish and pollutes the molten steel, thereby reducing the inclusions in the steel and improving the quality of the slab. Improve rolled properties. At present, the ladle pouring slag control methods are mainly divided into two categories, one is manual experience judgment, the stability of manual experience judgment is poor, and the ladle pouring is closed too early, resulting in more steel remaining in the ladle, resulting in waste, and the ladle pouring is clos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D43/00
Inventor 郭达张学民姜兴辰赵圣功宁伟李振梁景玥纪瑞东王尖锐贾卫东李俊李松刘志民张晓辉崔玉华王玉春孙翠华胡晓红
Owner LAIWU IRON & STEEL GRP
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