Liquid-state molten slag caching and flow measuring and controlling device

Abstract

The invention discloses a liquid-state molten slag caching and flow measuring and controlling device. The liquid-state molten slag caching and flow measuring and controlling device comprises a slag ladle, a plurality of combustion devices, a flue gas pipeline, a flow measuring and controlling module and a flow controlling device; the plurality of combustion devices are arranged on the top of the slag ladle and communicate with the interior of the slag ladle; the side face of the slag ladle communicates with the flow measuring and controlling module, and the slag ladle is connected with the flow measuring and controlling module through the flue gas pipeline; and the flow controlling device is arranged in the flow measuring and controlling module and used for controlling the flow, flowing tothe flow measuring and controlling module, of the slag ladle. According to the liquid-state molten slag caching and flow measuring and controlling device, the functions of online overhauling of liquid-state molten slag, accident handling, flow temperature monitoring and controlling, slag falling pipe replacing and the like can be achieved, then a system can run more stably, more safely and more reliably, and the liquid-state molten slag caching and flow measuring and controlling device can be widely applied to a liquid-state molten slag pelletization waste heat recycling system.

Description

technical field [0001] The invention relates to the technical field of blast furnace slag waste heat recovery, in particular to a liquid slag buffer and flow measurement and control device. Background technique [0002] After nearly 30 years of development, my country's steel production has increased significantly. Vertically, my country's crude steel output increased from 66 million tons in 1990 to 810 million tons in 2016, with a compound growth rate of 10.1%. Horizontally, my country's crude steel output reached 810 million tons in 2016, accounting for 50.5% of global output. During the iron and steel smelting process, a large amount of high temperature slag will be produced. It is estimated that the slag temperature of blast furnace slag can be as high as 1400-1550°C, and the sensible heat value per ton of high-temperature blast furnace slag can be as high as 1260-1880MJ / ton, which is equivalent to 60kg standard coal / ton. According to statistics, based on my country's...

AI Technical Summary

Problems solved by technology

Therefore, the abrasion phenomenon of the wall material of the auxiliary pipe is more common, so the auxiliary pipe needs to be replaced frequently, but the existing replacement process is complicated and the replacement time is long, which reduces the stability of the system operation

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