Device for crushing steel slag and recovering heat

Abstract

The invention provides a device for crushing steel slag and recovering heat. The device is characterized in that the device comprises an integration tank (48), wherein a feed port (34) and an exhaust port (33) are arranged at the top of the integration tank (48); a tail end slag outlet (18) is arranged at the bottom of the integration tank (48); water spray nozzles (2) are installed in the integration tank (48); and a primary slag outlet (7), ball milling rollers (9), a secondary slag outlet (14), a tertiary slag outlet (47), a primary sensible heat exchange chamber (46), a secondary sensible heat exchange chamber (23) and a tertiary sensible heat exchange chamber (41) are arranged in the integration tank (48); four water channels are arranged: the first channel is used for spray water circulation; the second channel is used for high temperature water circulation to generate power; the third channel is used for a refrigerating unit or floor heating unit; and the fourth channel is connected with a pipe network of domestic water for the users; a material distribution board A (13) is arranged below the secondary slag outlet (14); and a material distribution board B (40) is arranged below the tertiary slag outlet (47).

Description

technical field [0001] The invention relates to a steel slag crushing and heat recovery device. Background technique [0002] Steelmaking always produces a large amount of steel slag, and every ton of steel produced will produce 0.13 tons of steel slag. The hot steel slag is rich in heat energy, its temperature reaches 1400-1600°C, and each ton of slag contains 2.4×10 8 The sensible heat of KJ is equivalent to the energy of 30-40Kg heavy oil. And the steel slag contains about 10% scrap steel and a large amount of beneficial chemical elements, making full use of the useful components in the slag is conducive to improving the recycling efficiency of the steel slag. At present, most steelmaking enterprises at home and abroad process the hot steel slag after various cooling treatments, and then extract the metals for reuse. From the analysis of the processing methods of steel slag at home and abroad, most iron and steel enterprises carry out various cooling treatments on hot ...

AI Technical Summary

Problems solved by technology

However, this technology only considers the utilization of high-temperature steam; although the thermal conductivity of tin is high, its heat storage performance is very low, and its waste heat utilization rate is less than 40%; meanwhile, tin attached to the surface of steel slag is not conducive to the fragmentation of steel slag, resulting in scrap difficult to recycle

This technology can theoretically achieve a certain waste heat utilization effect, but it is extremely inconvenient in actual operation, and this technology belongs to intermittent work

Images