A converter sub-gun body

Abstract

The invention provides a converter sublance body, which includes a center steel pipe. A thermal insulating layer and an asbestos thermal insulating layer are fixedly sleeved on the outer circumferential wall of the center steel pipe from the inside out in order. A composite spray layer is coated outside the asbestos thermal insulating layer, a connecting pipe is inserted into the front end of the center steel pipe, and one connecting pipe end extending out of the center steel pipe is connected to a probe holder for mounting a probe. The converter sublance body provided by the invention can be applied into various types of converter sublance systems to adapt sublance probes with different functions. The multilayer structure of the sublance body ensures the flexural strength of the sublance body and also satisfies the heatproof function, realizes weight reduction of the sublance body under the premise of effective protection of a sensing cable in the sublance body, and reduces cooling water consumption of the converter system, thereby being conducive to optimizing the structure of the sublance system, and reducing energy medium consumption of the sublance system and the production cost.

Description

technical field [0001] The invention relates to the field of converter steelmaking production, in particular to a non-water-cooled converter sub-lance body. Background technique [0002] The progress of converter steelmaking technology and the progress of automation are largely due to the mature sub-lance technology. The sub-lance system is used to obtain actual data from the converter during the molten steel smelting process, so as to adjust the oxygen lance blowing, solvent addition, and judgment of the blowing end point. In smelting production, sub-lance technology has become the main means of automatic steelmaking in converters. [0003] Since the sub-lance body is directly inserted into the high-temperature converter during the measurement process, it is affected by high-temperature radiant heat and melt, so the cooling of the sub-lance body becomes a crucial technical issue. At present, the gun body of the sub-gun is cooled by cooling water. The traditional sub-gun ...

AI Technical Summary

Problems solved by technology

[0004] 1. The three-layer casing composed of outer pipe, middle pipe and central steel pipe has complex structure, difficult overall processing and high production cost;

[0005] 2. Since the sub-lance is frequently impacted when loading and unloading the probe, water seepage or leakage accidents may easily occur at the tip of the gun, which will seriously interfere with the measurement results of the probe and even have to replace the sub-lance body, which will adversely affect the normal production of the converter;

[0006] 3. The water-cooled converter sub-lance body also needs to provide stable equipment net ring water in the converter workshop, and has a separate cooling water valve station, not only the cost of medium consumption during production is high, but also the one-time investment of equipment is relatively high

[0007] 4. Due to the heavy weight of the water-cooled converter sub-lance, a large lifting force is required to realize the lifting operation, which requires high mechanical and electrical equipment for the lifting system, which increases the equipment investment of the sub-lance system

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