Production process of aluminium slag adjusting agent for LF refining furnace

A production process and refining furnace technology, applied in the field of aluminum slag adjustment agent, to achieve the effect of improving height, highlighting technological progress, and saving steelmaking costs

Active Publication Date: 2013-12-18
XINJIANG ZHONGHE DAZHENG COMMERCE & TRADE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the above literature, there is no precedent for aluminum-silicon carbide-carbon bricks to make aluminum slag adjusting agent. If it is crushed and ground, and its potential chemical activity is induced by mechanical force, it can be applied to LF refining furnace during the steelmaking process

Method used

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  • Production process of aluminium slag adjusting agent for LF refining furnace

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Experimental program
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Effect test

Embodiment

[0015] The production line is equipped with two AC-LF refining furnaces with a nominal capacity of 120 tons.

[0016] Process flow: discarded aluminum-silicon carbide-carbon bricks → crushing → grinding → adding limestone powder → pressing balls → power transmission for smelting.

[0017] 1) Waste refractories (Al 2 o 3 content of 71%) to the production plant, first sort out the industrial waste and iron-containing raw materials, wait for them to cool below 30 ℃, and use the outer dimensions of 1300×1400×1400mm produced by Shandong Jiuchang Heavy Industry Technology Co., Ltd. The PC0606 jaw crusher is used to crush the particles into 25mm particles, and then the particles are added to the 4R3216 Raymond Mill produced by Shanghai Jianshe Road and Bridge Machinery Equipment Co., Ltd., and processed into 2.9mm powders for use.

[0018] 2) Purchasing CaCO produced by Xinjiang Aiweiergou Harmony Mining Company 3 7 tons of limestone powder (particle size 0.9mm) with a content of ...

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Abstract

The invention provides a production process of an aluminium slag adjusting agent for an LF refining furnace. Waste refractory materials are taken and cooled to be at an indoor temperature, the waste refractory materials are crushed into 5-50mm particles, then the particles are added into a Raymond mill to be processed into powder with the particle size being smaller than 3mm, the powder and limestone powder with the particle size being smaller than 1mm are mixed according to the mass percent of 1:9, the mixed powder is placed in a coercive stirring mixer to be stirred and mixed and then is discharged evenly, the mixed powder is then added into a steel slag powder ball press machine or a refractory material ball press machine to be pressed into ball bodies of 20+ / -5mm, and the ball bodies are dried under the temperature of 20-50 DEG C and then used. In the process of LF smelting, 50-150kg of the aluminium slag adjusting agent needs to be added when every 100-300kg lime is added.

Description

technical field [0001] The invention relates to the recycling of aluminum-carbon refractory waste in steelworks, and the prepared aluminum slag adjusting agent can replace deoxidizers such as aluminum slag balls, deoxidizing slag, and synthetic slag with high cost, and is used for aluminum-killed steel and In the production process of silicon-aluminum killed steel. Background technique [0002] Iron and steel enterprises use aluminum-silicon carbide-carbon bricks as the working layer for refractory materials in contact with molten iron in the containers for containing molten iron, which are discarded after a certain period of use. Due to the long-term contact of these refractory materials with molten iron, the components between the brick body and the molten iron undergo different chemical reactions, and the structure of the brick body changes. The brick body is divided into a three-layer structure of the reaction layer, metamorphic layer and original layer. A small amount ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 吴汉元
Owner XINJIANG ZHONGHE DAZHENG COMMERCE & TRADE
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