Continuous casting and rolling method for aluminium-alloy foils on inner wall of evaporator

Abstract

The invention discloses a continuous casting and rolling method for aluminium-alloy foils on the inner wall of an evaporator, relates to the field of material forming, and particularly relates to the continuous casting and rolling method for the aluminium-alloy foils on the inner wall of the evaporator. The continuous casting and rolling method comprises the following steps of: firstly preparing needed materials, using pure aluminium as waste materials in the materials with the total input amount being less than or equal to 35%, wherein the input amount of secondary waste materials is less than or equal to 30% and the original aluminium ingot is more than or equal to 65%, and putting the materials into a smelting furnace for melting; stirring the melted materials, removing slags and adjusting components of the materials; carrying out refining treatment on the slag-removed materials in the smelting furnace; then transferring the refined materials into a temperature maintaining furnace to carry out secondary refining and standing treatment; and discharging the materials treated by secondary refining into a gas removing box to carry out gas-removing and slag-removing treatment. The continuous casting and rolling method disclosed by the invention has the advantages that the production process is simple, the production efficiency can be improved, the final produced foils have good formability, weldability and corrosion resistance, the organization and the performance are uniform, the metallurgical defects are fewer, and the aeolotropy is less, so that the continuous casting and rolling method is very suitable for the inner wall of the evaporator.

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