Unlock instant, AI-driven research and patent intelligence for your innovation.

Device and method for preventing slag in converter and shortening tapping time

A converter and time technology, applied in the field of steelmaking, can solve the problems of prolonged tapping time, difficult slag blowing, slag formation, etc., and achieve the effects of increasing furnace age, shortening tapping time, and reducing tapping temperature.

Active Publication Date: 2022-07-22
ANGANG STEEL CO LTD
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method blows the slag away by blowing in the gas. In the actual converter, due to the impact of the final temperature drop and slagging, the slag clumping phenomenon often occurs, and the slag is collected at the tapping side. The slag thickness increases. It is difficult to blow the slag away by purging, so this method is not very feasible in practice
Luxembourg, Germany, and Japan have developed the sliding plate slag blocking method, which has achieved good slag blocking effect, but its cost is high, and at the same time, the specific position of the tapping hole is easily affected by the splash during blowing
In addition, the slide plate does not have the function of the slag ball or the slag cone in the slag ball method to suppress the vortex at the upper part of the tap hole, and some steel slag emulsified by the vortex at the critical height will flow into the ladle with the molten steel. Suppressing the vortex by reducing the opening of the slide plate will inevitably result in longer tapping time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for preventing slag in converter and shortening tapping time
  • Device and method for preventing slag in converter and shortening tapping time
  • Device and method for preventing slag in converter and shortening tapping time

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A device for preventing slag from falling in a converter is composed of a slag avoidance cover 1 and a control trolley 2. The inner diameter of the slag avoidance cover 1 is 800mm and the inner height is 1200mm. The slag avoider 1 and the control trolley 2 are combined together by a support arm 1-7, and a hydraulic holding and drag ring 1-1 is arranged at the front end of the support arm 1-7, and the slag avoider 1 is clamped by hydraulic drive, supporting The rear end of the arm 1-7 is combined with the control trolley 2, the support arm 1-7 can be swung up, down, left and right by controlling the trolley 2, and the control trolley 2 can move back and forth on the track 6. A vent pipe A1-5 and a vent pipe B1-6 are arranged inside the support arm 1-7, and a through hole is provided on the side wall of the slag avoidance cover. And the ventilation pipes B1-6 are opposite to the through holes on the slag shield and are sealed by a gasket. A slag baffle 1-11 with suspensi...

Embodiment 2

[0048] Example 2: The device for preventing slag in the converter in this example is the same as that in Example 1.

[0049] Implement slag blocking for converters with a nominal capacity of 260 tons

[0050] 1) Pass the suspension wire 1-8 of the slag baffle 1-11 through the suspension hole 1-10 and fix it with the suspension pin, and hang the slag baffle on the top of the inner side of the slag shield;

[0051] 2) Move the control trolley 2 away from the tap position of the converter through the track 6, adjust the support arm 1-7 to a position suitable for installing the slag avoidance cover 1, put the slag avoidance cover 1 into the drag ring 1-1, and clamp it;

[0052] 3) When the slag avoidance hood 1 is used for the first time, gas is introduced into the interior of the slag avoidance hood 1 through the ventilation pipe A1-5, and oxygen is introduced into the ventilation pipe B1-6 for baking treatment, so that the temperature reaches 850 ° C;

[0053] 4) After the con...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

A device and method for preventing slag from falling in a converter and shortening the tapping time, and a method for using the slag avoidance cover, a control trolley, a support arm, a slag avoidance cap, and a slag baffle plate. The slag cap is movably installed at the lower end of the slag avoidance hood, and the slag baffle plate is suspended on the top of the slag avoidance hood. One end of the arm is connected to the over-control trolley, and the other end of the support arm is movably connected to the slag shield. The device of the invention has the advantages of simple structure and convenient operation, can reduce the slag in the tapping process caused by the vortex during the tapping process, can improve the yield of alloy in the alloying process after the furnace, can shorten the tapping time, and is beneficial to increase the output; The temperature drop of molten steel in the tapping process is reduced, and the tapping temperature can be reduced by 2-5 °C, which is beneficial to the improvement of furnace age.

Description

technical field [0001] The invention relates to the field of steelmaking, in particular to a device and a method for preventing slag in a converter and shortening the tapping time. Background technique [0002] In the process of converter steelmaking, in order to remove other impurities in molten iron, such as silicon, phosphorus, sulfur, etc., it is necessary to blow oxygen and add some slag-forming materials for smelting to generate molten steel and slag. After smelting, molten steel is released from the furnace through the tapping hole. With the continuous outflow of molten steel, the molten steel level in the furnace continues to decrease. The generation of the vortex will involve the steel slag floating on the molten steel surface into the molten steel. When the vortex is serious, air will be sucked in, resulting in a large amount of slag in the ladle and secondary oxidation of the molten steel. Due to the relatively high oxygen content and phosphorus content in the sl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/46
CPCC21C5/4653C21C2300/06Y02P10/25
Inventor 李德军廖相巍许孟春黄玉平康伟尚德礼吕春风
Owner ANGANG STEEL CO LTD