Machining method of metallurgical furnace launder

Abstract

Provided is a machining method of a metallurgical furnace launder. A mode that plate blank forging and machining are combined is used for machining. The method comprises the following steps that forged plate blanks are forged and pressed into a metallurgical furnace launder semi-finished product with an arc face; and a metallurgical furnace launder component semi-finished product is subjected to finish machining to form a metallurgical furnace launder finished product. The machined metallurgical furnace launder finished product comprises a launder body. The launder is formed in the top of the launder body. A plurality of cooling water channels are arranged in the launder body. The cooling water channels are communicated with each other in an end-to-tail mode. At least one water inlet and one water outlet are formed. A forming technology is changed into the mode that forging, pressing and machining are combined, so that body materials are compact, grain refining is achieved, mechanical property is good, heat conductivity is high, composite holes are used as the cooling water channels, the cooling performance of the cooling water channels is further improved, the improvements are combined so that the thickness of the launder body can be greatly reduced, a producer can know that the launder with good performance can be obtained with low cost increased, frequent maintaining or replacing is of no need, influence on normal production can be greatly reduced, and production efficiency is greatly improved.

Description

technical field [0001] The invention relates to a processing method for a launder of a metallurgical furnace. Background technique [0002] At present, the launders used in commonly used metallurgical furnaces are used to transport materials in a molten state (such as molten iron or slag). A complete launder is usually connected by one or several launders. It is often connected by means of flanges and bolts. The main body of the launder is usually made of red copper or alloy copper. The traditional process is to pre-embed the cooling copper tube, and then pour the copper tube and molten copper as a whole. After forming, the cross-sectional shape of the runner has a "U" shape, etc. [0003] The disadvantages of the above-mentioned traditional casting process are as follows: [0004] 1) The body is cast and formed, which is prone to sand holes, shrinkage defects, pores, pinhole defects and crack tendencies. This is because the casting body shrinks a lot, and the body shrink...

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Problems solved by technology

[0005] 2) The body strength of cast copper or alloy copper is low, and the surface quality after molding is relatively rough, which increases the resistance of material flow in the molten state and increases unnecessary loss

If the casting surface is finished, it is easy to expose internal casting defects such as pores and cracks, and greatly increase the manufacturing cost

[0006] 3) The main body is buried in pipe casting, and there is a large air gap thermal resistance between the pre-embedded copper pipe and the main body. This is because it is difficult to achieve metallurgical bonding between the main body and the water pipe. In a high temperature working environment, the air gap thermal resistance is greatly weakened. Heat transfer capacity

[0007] 4) Due to the technical constraints of the outer diameter of the embedded copper pipe and the minimum bending radius, the thickness of the buried pipe casting body is relatively thick, resulting in a large design weight of the entire launder

[0008] The applicant found that the problem of the above-mentioned traditional launder is not only the material and manufacturing method used, but also its structure is very unreasonable, which leads to its poor heat transfer capacity, easy damage, and short life, and the launder needs to be repaired or replaced frequently. Thus affecting the normal production of the metallurgical furnace

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