A slag drainage device for slag wool and its application method

Abstract

The invention relates to a molten slag drainage device for slag wool and a use method thereof. The device comprises a slag discharge container, a slag discharge spout, a slag receiving container; the slag discharge container is connected at an inlet end of the slag discharge spout through a slag discharge guide slot; an outlet end of the slag discharge spout is connected with the slag receiving container through a slag receiving guide slot; the slag discharge spout is internally provided with a heater, and the heater is parallel to the flowing direction of molten slag in the slag discharge spout; the lower ends of supporting rods at both ends of the heater are connected with a power controller by heating wires, and the power controller is connected with a power supply; the molten slag enters the slag discharge container through a blast furnace slagging port, enters the slag discharge spout through the slag discharge guide slot, is heated in the slag discharge spout, keeps good liquidity, and is directly used for slag wool production through the slag receiving guide slot and the slag receiving container. The molten slag can flow in relatively long distance without solidification, long-distance transport of the molten slag is achieved, and the process cost for directly producing products from the molten slag is decreased significantly.

Description

technical field [0001] The invention relates to the technical field of metallurgical slag, in particular to a slag drainage device for slag wool and a method for using the same. Background technique [0002] Molten blast furnace slag is one of the main by-products of blast furnaces and a major component of steel plant waste slag. Usually, each ton of molten blast furnace slag contains (126~188)×10 4 The sensible heat of kJ is equivalent to the energy of 30-40kg heavy oil, and it has a relatively high temperature, about 1450-1600 ℃, which is a high-quality waste heat resource and has a high recycling value. Recovering this part of sensible heat will reduce production costs and create economic benefits for enterprises. [0003] At present, most of the blast furnace slag at home and abroad is water quenched. Although a small amount of heat can be recovered in the form of residual hot water, most of the energy cannot be recovered, resulting in huge energy waste. The direct pr...

AI Technical Summary

Problems solved by technology

This utility model supplements heat and eliminates hanging slag by means of flame combustion at the slag inlet end, but cannot realize online heating and long-distance transportation of slag, which significantly reduces the sensible heat utilization ratio of slag, and affects the overall process of subsequent products. Adverse effects of the layout plan

[0005] In short, there are few technologies related to online slag drainage devices in the prior art, and in the actual production of slag wool, the prior art often transfers the slag through the tundish and then heats the slag through the electric furnace and the cupola. Complexity, large investment, low operating rate, high cost of use, etc.

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