Tiltable rotary secondary aluminum smelting furnace

Abstract

This invention relates to a tilting rotary secondary aluminum smelting furnace. It includes roller type rotary furnace body, which is supported on the steel support. The anterior end of rotary furnace is arranged in the sleeve. The anterior end face of the rotary furnace has round furnace opening. The posterior end of rotary furnace connects to power device. The steel support corresponding to the rotary furnace posterior end parts connects to lifting cylinder. The steel support corresponding to the rotary furnace anterior end part connects to supporting shaft. There is round furnace door corresponding to the round furnace opening. There is sealing ring between the round furnace opening and door. The round furnace door is arranged on the roll-over shaft and connects to controlling oil cylinder. The round furnace door has fuel gas combustor and waste air discharging opening. The structure is simple. This invention is convenient. It has low energy dissipation and high producing efficiency.

Description

technical field [0001] The invention relates to a tiltable rotary regenerated aluminum smelting furnace, which is suitable for smelting regenerated aluminum. Background technique [0002] With the rapid development of the aluminum industry and the extensive application of aluminum in national economic construction, the contradiction between the demand for primary aluminum resources has become increasingly prominent, and vigorously developing the recycling and utilization of secondary aluminum resources is the only way for the development of the aluminum industry. [0003] The existing recycled aluminum smelting furnace generally adopts a horizontal rectangular molten pool reverberatory furnace, and the inner lining is made of refractory brick lining or castable lining to melt remelted aluminum ingots and high-quality recycled aluminum raw materials, which process aluminum ash and aluminum slag , Aluminum chips and low-quality recycled aluminum raw materials containing iron p...

AI Technical Summary

Problems solved by technology

[0003] The existing recycled aluminum smelting furnace generally adopts a horizontal rectangular molten pool reverberatory furnace, and the inner lining is made of refractory brick lining or castable lining to melt remelted aluminum ingots and high-quality recycled aluminum raw materials, which process aluminum ash and aluminum slag , aluminum shavings, and low-quality recycled aluminum raw materials containing iron parts have poor capacity. The main disadvantages of existing recycled aluminum smelting furnaces are: (1) high energy consumption

Generally, the smelting temperature of the reverberatory furnace for aluminum smelting is relatively high. From the end of smelting to the end of casting, the temperature of the furnace body decreases from the highest to the lowest, and a large amount of precious heat is lost, resulting in increased energy consumption.

(2) High metal burning loss

The heating method of aluminum melting furnace is generally reflective heating. During the heating and smelting process, the melt surface is covered with a thick layer of protective smelting agent. The composition of the smelting agent is generally chloride. The heat rate is slow, therefore, it is necessary to increase the heating temperature for smelting, which increases energy consumption on the one hand, and on the other hand, the solid-liquid phase is mixed during the heating process, and continuous stirring measures cannot be taken, resulting in a relatively large temperature difference between the upper and lower sides of the aluminum melt, reaching 50 °C Above, the temperature in the furnace at the end of melting is generally 950-1050°C, which may easily cause local overheating of the metal melt and cause burning loss. Taking engine pistons and waste casings as examples, the burning loss is generally about 5-10%.

(3) Poor operating environment and high labor intensity

At the initial stage of charging and ignition, due to the complex sources of recycled aluminum (mainly engine parts), a large amount of organic matter volatilizes to form thick smoke, which pollutes the environment; The main white smoke, the smoke is relatively harmful to the human body, after refining, the last process before casting - slag removal, generally using manual slag removal or semi-mechanized slag removal, strong high temperature radiation, serious dust flying, Deteriorating the operating environment and increasing labor intensity

(4) Pollution of iron and other harmful impurities with high melting point cannot be eliminated

Because the melting temperature in the furnace is high, 950-1050°C, the iron and other high-melting point metals in the recycled aluminum raw materials melt into the aluminum melt under long-term high-temperature melting conditions, reducing the grade of the aluminum melt

(5) The ability to continuously melt recycled aluminum raw materials is poor, and labor productivity is low

In general aluminum smelting reverberatory furnaces, after melting and smelting, batching, refining and slag removal, and casting processes are carried out. The production cycle is relatively long, which leads to waste of equipment and reduces labor productivity.

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