Blast furnace slag treatment method

Abstract

The invention relates to a blast furnace slag treatment method comprising the steps of A, loading and transporting molten blast furnace slag by using a slag pot car, and carrying out heat insulation treatment on the molten blast furnace slag in the transportation process to sufficiently settle metal iron in the blast furnace slag; B, transporting the blast furnace slag to a slag dumping field by using the slag pot car, dumping slag towards a first slag pit after entering a preset station, controlling the dumping angle of a slag ladle, and dumping part of the blast furnace slag into the first slag pit; C, dumping the residual blast furnace slag into a second slag pit; and D, respectively obtaining blast furnace slag from the first slag pit and the second slag pit after cooling the blast furnace slag. According to the blast furnace slag treatment method, the metal iron is enriched to the bottom of the slag pot car in advance through heat insulation treatment, and then, the blast furnace slag with relatively low metal iron content is dumped into the first slag pit and the blast furnace slag with relatively high metal iron content is dumped into the second slag pit in a in-batch slag dumping way to obtain two kinds of blast furnace slag, so that the subsequent treatment on the blast furnace slag can be conveniently realized.

Description

technical field [0001] The invention relates to a method for treating blast furnace slag. Background technique [0002] Blast furnace slag is the tailing slag produced by blast furnace ironmaking. Usually, when the ironmaking production site is limited, the molten blast furnace slag is transported to the slag yard by slag tank truck for treatment, which is one of the common treatment methods. Generally, the volume of the slag tank car is 8-22 cubic meters. Each time, 12-20 slag tank cars are formed into a group, which is transported to the slag yard by the train tractor along the railway. The molten blast furnace slag has its own fluidity, and the blast furnace slag is tipped into the pre-prepared slag pit. Existing slag tank cars are usually equipped with an electric tilting device, which can adjust the tilting speed and angle. At the same time, in order to prevent the molten blast furnace slag from sticking to the slag tank, an anti-sticking agent is sprayed before loadin...

AI Technical Summary

Problems solved by technology

Therefore, blast furnace slag must be subjected to magnetic separation during the crushing and screening process. Since metallic iron is dispersed in the slag, in order to achieve sufficient iron selection and control the content of metallic iron in the slag, more than ten magnetic separation equipment must be installed to select Iron slag of various particle sizes and grades, and it is difficult to obtain iron slag of higher grade

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