Method and device for cooling and waste heat recovery of flash smelting furnace body

Abstract

The invention discloses a method and a device for cooling and waste heat recovery of a flash smelting furnace body. The method comprises the steps of carrying out district cooling on a flash smelting furnace; carrying out forced circulation cooling in a sedimentation tank and membrane-type natural circulation water-cooled vaporization in a reaction tower; keeping the temperature of a water-cooled wall of the reaction tower to be lower than 280 DEG C; and recovering the waste heat cooled in the flash smelting furnace body to generate low-pressure steam with the pressure of lower than 1.5 MPa and simultaneously meet the requirement of load change of the reaction tower on cooling. A thermal insulation material layer (3) is arranged on the inner wall of an outer housing (4) of the reaction tower (14), a membrane-type water-cooled wall (2) is arranged inside the thermal insulation material layer (3), and a ramming flame-proof material layer (1) is coated on the inner side the membrane-type water-cooled wall (2). According to the method and the device for cooling and waste heat recovery of the flash smelting furnace body, the amount of cooling water is saved, and simultaneously the cooling requirement of load change of the reaction tower is met.

Description

technical field [0001] The present invention relates to a method and device for recovering waste heat from the cooling of flash smelting furnace body, in particular to a water-cooled furnace body method combining natural circulation and forced circulation Background technique [0002] The flash smelting method has the advantages of large production scale, good working conditions and high level of automation. It has been applied in the extraction of non-ferrous metals such as copper, lead and nickel, and has developed rapidly. At the end of the last century, there were only 15 flash furnaces in the world, including 3 in my country. Now my country has nearly 20 flash furnaces, and its production capacity has also grown from 100,000 tons / seat in the last century to 350,000 tons / seat today. [0003] Flash smelting is a pyrothermal high-temperature smelting process. The refractory lining of the equipment is easily damaged by the erosion, erosion and thermal stress of high-tempera...

AI Technical Summary

Problems solved by technology

Therefore, when the output of the flash furnace changes, the high temperature area in the reaction tower will also change accordingly, and the original cooling water jacket cannot meet the cooling demand of the changing production load

Images