High-temperature material handling spiral

Abstract

The invention relates to a helix for transporting a high-temperature material, which comprises a main shaft and a helical blade fixed outside the main shaft. The main shaft is a double-sleeve hollow shaft, an outer sleeve of the main shaft and the helical blade are integrally manufactured by an overlaying welding technique, a main water inlet pipe is arranged in an inner sleeve of the main shaft, a cooling return water passage of the main shaft is formed between the two sleeves, a hollow water-cooled tank is arranged in the helical blade along the surface of the outer sleeve of the main shaft, the outlet end of the main water inlet pipe is provided with a flow divider, cooling water is divided into two flows by the flow divider, the two flows enter the cooling return water passage of the main shaft and the hollow water-cooled tank of the helical blade respectively, and the two flows of cooling return water are merged and discharged at a water outlet of the cooling return water passage of the main shaft. The helix has the advantages of reasonable structure, good water cooling effect, large effective working area of the blade, high abrasion resistance performance, high discharging working efficiency, full play to double advantages of a material and a structure, and long service life.

Description

technical field [0001] The invention relates to a material conveying device, in particular to a high-temperature material conveying screw. It is suitable for discharge screw of circular rotary hearth furnace. Background technique [0002] We know that in recent years, my country's steel production has grown rapidly, and steel equipment tends to be large-scale. On the one hand, it promotes the rapid development of the national economy, on the other hand, it also puts the two major problems of energy consumption and environmental pollution in front of the world. For the consideration of environmental protection and energy saving, in the 1970s, the United States took the lead in researching the new ironmaking technology of direct reduction of carbon-containing pellets heated by annular rotary hearth furnaces. my country also started the development of this technology in the 1990s. research work. Compared with the blast furnace ironmaking process, this technology eliminates th...

AI Technical Summary

Problems solved by technology

Practice has proved that the main failure mode of the discharge screw is abrasive wear under high temperature environment, and the main problem is that the service life is short

As far as the service life of the discharge screw is concerned, the service life of German-made products is about 6 months, that of American-made products is about 3 months, and that of domestic products is less than 1 month.

In order to make up for the problem of low propulsion efficiency due to the large d / D, multi-head blades are used, generally 4-6 heads, to improve the working efficiency of the discharge screw, which greatly increases the difficulty of blade manufacturing.

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