Continuous rolling method of evaporator inner wall aluminum alloy foils

Abstract

The invention discloses a continuous rolling method of evaporator inner wall aluminum alloy foils, and relates to the field of material molding, in particular to the continuous rolling method of the evaporator inner wall aluminum alloy foils. The method comprises the following steps: firstly, needed raw materials are prepared; wastes in the raw materials adopt pure aluminum; the total input of thewastes is not more than 35%, wherein the second-grade waste input is not more than 30%, and raw aluminum ingots are not less than 65%; the raw materials are fed in a smelting furnace for melting; themolten raw materials are stirred and slagged, and components of the raw materials are adjusted; the slagged raw materials are refined in the smelting furnace; the refined raw materials are transferred into an insulation furnace for secondary refining and standing; and the secondarily refined raw materials are discharged into a degassing box for degassing and slagging. The production process is simple; the production efficiency can be improved; and produced final foils are excellent in molding property, welding property and corrosion resistance, uniform in structure and performance, few in metallurgy defect, low in anisotropy and more suitable for serving as evaporator inner walls.

Description

technical field [0001] The invention relates to the field of material forming, in particular to a method for continuous casting and rolling of an aluminum alloy foil on the inner wall of an evaporator. Background technique [0002] Evaporation is a unit operation that uses heating to heat a solution containing non-volatile solutes to boiling, so that part of the solvent is vaporized and removed, thereby increasing the concentration of solutes in the solvent. Evaporators are widely used in chemical industry, food industry, pharmaceutical and other industries. [0003] The circulating cooling water of the evaporator contains a large amount of salts, corrosion products and various microorganisms. Since the water has not been treated, a large amount of calcium, magnesium carbonate scale, algae and microorganisms will form on the side of the water after the evaporator has been running for a period of time. Sludge, sticky mud, etc. These dirt are firmly attached to the inner surf...

AI Technical Summary

Problems solved by technology

[0003] The circulating cooling water of the evaporator contains a large amount of salts, corrosion products and various microorganisms. Since the water has not been treated, a large amount of calcium, magnesium carbonate scale, algae and microorganisms will form on the side of the water after the evaporator has been running for a period of time. Sludge, sticky mud, etc. These dirt are firmly attached to the inner surface of the copper tube, resulting in deterioration of heat transfer, increase in cycle pressure, and decrease in vacuum of the unit, affecting the operating efficiency of the unit and causing greater economic losses

The inner wall is affected by the medium and welding stress, and it is prone to leakage and corrosion, which will cause the function of the equipment to decline. If the treatment is not timely, it will not only lead to the scrapping of the equipment, but even cause a major production accident