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Blast furnace slag treatment method

A treatment method and technology of blast furnace slag, which is applied in the field of blast furnace slag treatment, can solve problems such as difficulty in obtaining high-grade slag and iron, and achieve the effects of simplifying the production process and reducing production energy consumption

Active Publication Date: 2015-08-05
攀枝花攀西蓝星化学清洗有限公司
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  • Abstract
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  • Claims
  • Application Information

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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

Method used

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  • Blast furnace slag treatment method

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Embodiment

[0029] The blast furnace slag processing method, the steps are:

[0030] A. The blast furnace slag in the molten state is transported by slag tank truck. During the transportation, the blast furnace slag in the molten state is kept warm for 30 minutes to 50 minutes, so that the metallic iron in the blast furnace slag can be fully settled; the high temperature in the molten state The slag heat preservation method is as follows: after the blast furnace slag is loaded into the slag tank car, spray a cooling agent on the surface of the blast furnace slag, and make the cooling agent crust on the surface of the molten blast furnace slag in the slag tank to completely cover the surface of the molten blast furnace slag, thereby To heat preservation, the cooling agent is blast furnace slag or steel slag in natural state;

[0031] B. The blast furnace slag is transported to the slag dumping yard by the slag tank truck. After entering the predetermined station, it will dump the slag towa...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/06
CPCY02W30/50
Inventor 何奇杨胜利苏辉
Owner 攀枝花攀西蓝星化学清洗有限公司
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