Welding type metallurgy slag pot without bolt connection and manufacturing method of welding type metallurgy slag pot

Abstract

The invention discloses a welding type metallurgy slag pot without bolt connection and a manufacturing method of the welding type metallurgy slag pot. The welding type metallurgy slag pot consists of a pot body, trunnions and trunnion seats; a quadrangular frustum pyramid body having the oblique surface taper is arranged at one end of each trunnion; the two trunnion seats are of box-shaped frame structures symmetrically distributed on the two sides of the pot body; the trunnions are inserted into and located in the centers of the square frame shaped trunnion seats; the bottom surface of each quadrangular frustum pyramid body having the oblique surface taper at one end of the corresponding trunnion is directly fitted with the oblique surface pot wall of the pot body without welding; and the four side edges of each quadrangular frustum pyramid body of the corresponding trunnion are welded with the four edges, parallel to the four side edges of the quadrangular frustum pyramid body, of the corresponding trunnion seat by inserted 4-8 vertical rib plates, and then one trunnion and one trunnion seat form an overall stress structure correspondingly without the bolt connection. The manufacturing method comprises the steps of assembling the pot body, the trunnions, the trunnion seats and flange ring components and carrying out welding fabrication. A previous slag pot trunnion and trunnion seat bolted connection structure and an assembling mode are changed, a manufacturing technology is simplified, a manufacturing cycle is shortened, the service life is prolonged, the overhaul and maintenance are facilitated, the cost performance is improved, and the potential safety hazards in production are eliminated.

Description

technical field [0001] The invention belongs to the field of metallurgical slag tank equipment, and in particular relates to a welded metallurgical slag tank without bolt connection and a manufacturing method thereof. Background technique [0002] The slag tank is a high-temperature equipment used to hold molten steel slag and molten iron slag in the steelmaking process. The slag pots in domestic and foreign steelmaking processes are all formed by casting. Due to the harsh high-temperature conditions of slag processing, people's thinking is fixed only to use castings and not welded parts, because the weld is a weak link. However, it has been proved that casting slag tanks inevitably have various defects: shrinkage cavity, porosity, porosity, segregation, inclusions, hot cracks, cold cracks, etc. Therefore, casting slag tanks have a short life, are difficult to repair, consume a lot, and cost high . In addition, the explosion of molten steel after the cracking of the found...

AI Technical Summary

Problems solved by technology

However, it has been proved that casting slag tanks inevitably have various defects: shrinkage cavity, porosity, porosity, segregation, inclusions, hot cracks, cold cracks, etc. Therefore, casting slag tanks have a short service life, are difficult to repair, consume a lot, and cost high

Therefore, mechanical processing has certain technical difficulties, and the processing cost is relatively expensive.

[0005] (2) The trunnion and the tank body are connected by bolts, and the bolt hole processing process needs to be added

A total of 24 heat-resistant, high-strength bolts are installed at both ends, and bolt costs need to be increased

Therefore, mechanical processing has certain technical difficulties, and the processing cost is relatively expensive.

[0006] (3) The trunnion and the tank body are connected by bolts, and the "hot loading process" needs to be added

Therefore, the assembly process is more complicated, and the assembly method is time-consuming and laborious

[0007] (4) The trunnion and the tank body are connected by bolts, and the cost of bolts (spare parts) will also be increased

Each one is only calculated at 100 yuan, and the cost of bolts will increase by 2,400 yuan. In addition, additional bolts will be consumed during use, which will increase the cost.

[0008] (5) The trunnion and the tank body are connected by bolts, which requires additional spare parts and maintenance costs

If the potential in this area continues to be tapped, the manufacturing cost of the welded structure slag tank will decrease, the service life will be extended, and the cost performance will be further improved

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