Self-consumable simple thermal insulation cover of molten iron transport tank and its application method

Abstract

The invention discloses a self-consumption type simple heat preserving cover of a molten iron conveying tank and a use method of the self-consumption type simple heat preserving cover. The self-consumption type simple heat preserving cover is arranged on a container opening of a molten iron container. The heat preserving cover comprises a concave heat preserving assembly. The concave heat preserving assembly is a rotary body with an opening formed in the top, wherein the external diameter of the rotary body is gradually reduced from top to bottom, the concave heat preserving assembly is embedded into the container opening, and comprises an internally-hollow concave metal sheet box, a bottom leak hole is formed in the bottom face of the concave metal sheet box, inverted L-shaped tank opening supporting frames are symmetrically arranged on the end face of the edge of a box opening of the concave metal sheet box, the bottoms of the vertical sections of the tank opening supporting frames are connected with the upper end face of the concave metal sheet box, and the concave metal sheet box is filled with a heat preserving layer. The self-consumption type simple heat preserving cover hasthe advantages that the self-consumption type simple heat preserving cover is simple in structure, convenient to use and excellent in heat preserving performance, materials are cheap and easy to obtain, the cover body structure metal materials are online molten and recovered, molten iron slag is online modified with heat preserving material ash, and the acclimatation capacity is high.

Description

technical field [0001] The invention relates to the technical field of heat preservation and transportation of molten iron, in particular to a self-consumable simple heat preservation cover of a molten iron conveying tank and a method for using the same, which is suitable for the whole process of heat preservation at the mouth of a molten iron tank or a torpedo tank. Background technique [0002] Molten iron is the main raw material for steelmaking. The chemical heat and physical heat of molten iron are the main heat sources for converter steelmaking. The temperature of molten iron is a sign of how much physical heat is brought into the converter. According to the converter smelting process, the heat of converter smelting basically comes from the physical heat and chemical heat of molten iron. Under the condition of constant chemical heat, the physical heat of molten iron is the key factor to determine whether the converter smelting can be smooth, and also determines the amou...

AI Technical Summary

Problems solved by technology

The Chinese patent "An environmentally friendly thermal insulation cover for a disposable molten iron transport tank and its use method, patent application number: 201810663611.2" discloses a cover body consisting of a bottom plate, a support ring, support frame 1, support frame 2, The simple thermal insulation cover composed of the cover plate on the support ring and the carbon thermal insulation layer has the advantages of simple structure, cheap and easy-to-obtain materials, convenient use, excellent thermal insulation performance, online melting and recycling of metal materials of the cover structure, and online molten iron slag modification of thermal insulation material ash and other advantages, it can realize the purpose of one-time capping of the molten iron conveying container for the whole process of heat preservation; however, the submerged capping method of the circular thermal insulation cover, in order to facilitate the embedded capping of the open mouth of the molten iron conveying container after the slag sticks to the pot mouth, leads to a round The shape insulation cover is smaller than the mouth of the tank, and the insulation cover of the tank mouth is not fully covered, so there is still a lot of room for improvement in the insulation effect. In addition, the carbon insulation layer in the insulation cover in rainy days is easy to accumulate water and absorb moisture, which may cause blast furnace tapping process. Due to the rapid evaporation of water absorbed by the carbon insulation layer, the molten iron is violently splashed, which endangers the safety of the molten iron transport container, which is also the main reason why the capping operation is not carried out in rainy days

[0005] To sum up, the thermal insulation of molten iron tanks with covers has a significant contribution to reducing the temperature drop of molten iron transportation and improving the technical and economic indicators of steelmaking. For this reason, a large number of theoretical and practical researches have been carried out at home and abroad. The method and advanced remote control mode have been reliably applied in actual production, but the one-time investment is huge, the investment recovery period is long, and it is difficult to transform old enterprises; Good heat preservation effect has been achieved in industrial tests, but it is difficult to implement stably due to site and space constraints, which is the main reason why there is no large-scale promotion; although the simple consumable heat preservation cover realizes the heat preservation of the molten iron transport container once covered purpose, but still in the heat preservation effect needs to be improved and the problem of safe use in rainy days

Images