High-temperature furnace roller for CSP (Compact Strip Production) heating furnace

Abstract

The invention discloses a high-temperature furnace roller for a CSP (Compact Strip Production) heating furnace. The high-temperature furnace roller comprises a tubular roller body steel shaft, wherein the outer wall of the roller body steel shaft is provided with roller rings at intervals; the outer wall of the roller body steel shaft between adjacent roller rings is provided with a heat-insulating lining; a water-cooling pipe is arranged in the roller body steel shaft; one end of the water-cooling pipe is provided with a water-cooling pipe supporting clamp seat; a roller body end head baffleplate which is hermetically connected with the inner wall of the roller body steel shaft is arranged outside the end part of the water-cooling pipe supporting clamp seat; a first cavity is formed between the roller body steel shaft and the water-cooling pipe; the pipe wall of the water-cooling pipe close to the water-cooling pipe supporting clamp seat is provided with water outlet through holes which are uniformly distributed along circumference; and the water outlet through holes are communicated with a water inlet end in the water-cooling pipe and the first cavity to form a closed water path. The high-temperature furnace roller has the advantages of simple structure, convenience and quickness in manufacturing, convenience in use and maintenance, low cost, application temperature reaching up to 1,300 DEG C and suitability for being widely applied to the technical field of thermal equipment of industrial furnaces.

Description

technical field [0001] The invention relates to industrial furnace thermal equipment, in particular to a high-temperature furnace roller for a CSP heating furnace. Background technique [0002] The furnace roll is the most important equipment in the CSP (Compact Strip Production, compact strip steel production line) roller hearth heating furnace. . It is mainly composed of supporting roller shaft, water-cooled steel pipe, metal roller body, heat-resistant metal roller ring, refractory material heat insulation lining between roller rings, etc. The structure of the furnace roller is complex and the production cost is high; The heat-resistant metal roller ring of about 80mm supports the thin slab casting. Through the forward and reverse rotation and speed adjustment of the furnace roller and the friction drive between the roller ring and the thin slab casting slab, the conveying and buffering time of the casting slab in the furnace are completed. The adjustment can realize th...

AI Technical Summary

Problems solved by technology

However, the structure of the furnace roller water cooling channel, roller ring and heat insulation lining is complex and difficult to manufacture, resulting in high overall cost of the furnace roller

At the same time, the enhanced cooling of the roller ring leads to a large water cooling heat loss of the furnace roller, which is not conducive to the energy saving of the roller hearth heating furnace

There have been domestic reports that this technology has been tried on a CSP roller hearth furnace with a furnace temperature of less than 1200°C, but it was abandoned due to unsatisfactory service life and cost.

In addition, Italy Dexing Company also has an example of using Co50 heat-resistant alloy roll rings to meet the requirements for the use of CSP roller hearth heating furnaces with a furnace temperature higher than 1200 ° C. However, Co50 heat-resistant alloy roll rings are very expensive and cannot be popularized.

The document "Baogang Science and Technology" published a technical paper (2004, 30 (2)) written by Feng Liyi, Zhou Jianping and Zhang Qian titled "Research and Development of Roller Rings for CSP Heating Furnaces", reporting that heat-resistant metals for roller rings The localization and application of materials, through the material analysis of the imported German LOI company's roll ring, under the condition of ensuring the main components such as C, Ni, Cr in the steel, adjust the microalloy Nb, Mo, Ti, Co, A1, The mass fraction of Si and the smelting method of reducing S and P in steel have completed the development of heat-resistant alloys for roll rings, and achieved the same application effect as imported roll rings without changing the structure of roll rings, making roll rings The cost is reduced by 2 / 3; but the maximum furnace temperature that the roller ring can adapt to is ≤1200°C, which cannot meet the needs of higher furnace temperature

To sum up, domestic and foreign related patents and technical research only consider the service life and maintenance cost of furnace rollers, but for the cost reduction and comprehensive performance of furnace rollers for high-temperature roller hearth heating furnaces with a furnace temperature greater than 1200°C Improvements need further research

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