Pneumatic conveying type automatic mold powder feeding device

Abstract

A pneumatic conveying type automatic mold powder feeding device belongs to the field of continuous casting process equipment and comprises a large stock bin, a pneumatic conveying device, a middle hopper, an electrically operated valve, a feeding pipe, a small hopper, a screw feeder, a two-dimensional motion mechanism and a base seat. The device uses pneumatic conveying manner to realize remote feeding and to ensure the stock bin to be far away from a continuous caster, thus increasing the storing amount, and the device can allow long-time continuous work; the small hopper, the screw feeder and the two-dimensional motion mechanism are arranged at the lateral wing of a middle tank vehicle, thus avoiding interfering other operations of the worker; the feeding amount can be controlled accurately by gravity blanking and feeding by the screw feeder; the conveying pipeline is completely closed, thus avoiding lag leakage and dust; uniform spreading of large area of mold powder can be realizedby the orthogonal coordinate type two-dimensional motion mechanism, and the device is suitable for producing plate blanks and square blanks of different sizes and specifications; the surface qualityof steel blanks can be improved by the device, and the device can reduce labor intensity and save the mold powder.

Description

technical field [0001] The invention belongs to the field of continuous casting process equipment, in particular to a pneumatic conveying type mold slag automatic adding device, which is suitable for the production of slabs of different sizes and specifications. Background technique [0002] Continuous casting mold powder is an indispensable metallurgical auxiliary material in the continuous casting of iron and steel. When casting in the continuous casting mold, it is required to spread protective slag on the molten steel surface of the mold to form a slag layer to achieve the purpose of lubricating and preventing the molten steel from contacting with air, thereby improving the quality of the billet. Compared with the traditional method of manual addition by workers with small shovels, the automatic mold powder addition technology has the advantages of controllable addition time and amount, uniform addition, improved billet surface quality, labor saving, and improved working...

AI Technical Summary

Problems solved by technology

The key problems to be solved by the mold slag automatic adding device are: (1) The same continuous casting machine needs to produce steel slabs of different sizes, and the mold slag automatic adding device needs to adjust the area of ​​mold slag spreading in a wide range to adapt to Mold openings of different sizes; (2) The uniformity of mold slag spreading on the molten steel surface is closely related to the surface quality of the billet. Therefore, it is necessary to precisely control the amount and frequency of mold slag addition; Adding slag in time requires a large amount of mold slag, and there are many equipments near the continuous casting mold and the space is narrow, so it is not suitable for a large silo with a large amount of mold slag

The disadvantage of this device is that the screw conveying pipe cannot move, so it is difficult to adapt to the slag addition of slabs and large-area billets

The shortcomings of this device are: (1) A large number of workers operate in front of the crystallizer, and the device feeds from the front, which hinders the workers' operation; (2) Secondly, due to the limitation of the size of the trolley, it is difficult to make the silo larger , so it is necessary to manually add mold slag to the hopper frequently; (3) single-degree-of-freedom swing, even with the expansion and contraction of the sprinkler head in the radial direction, it is difficult to better adapt to the production of slabs of different sizes and specifications in a wide range

[0005] An existing mold powder automatic adding device, such as Japanese patent JP11239855, adopts single-degree-of-freedom horizontal swing and cooperates with the expansion and contraction of the sprinkler head in the radial direction, which is still only suitable for the crystallizer mouth of thinner slabs, and cannot better adapt to different slabs Dimensions of crystallizer mouth

[0006] In addition, existing equipment is placed directly in front of the tundish truck

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