Method for preparing Al-Si-Fe alloy by using high-ferrum and high-silicon bauxite

A technology of high-silicon bauxite and ferroalloy, which is applied in the field of preparing aluminum-silicon-ferroalloy from high-iron and high-silicon bauxite

Active Publication Date: 2014-04-09
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the problems of the existing high-iron and high-silicon bauxite research process and the current situation of Al-Si ferroalloy production, the pre...

Method used

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  • Method for preparing Al-Si-Fe alloy by using high-ferrum and high-silicon bauxite
  • Method for preparing Al-Si-Fe alloy by using high-ferrum and high-silicon bauxite
  • Method for preparing Al-Si-Fe alloy by using high-ferrum and high-silicon bauxite

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Experimental program
Comparison scheme
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Embodiment 1

[0017] A high-iron high-silicon bauxite Fe 2 o 3 The content is 36.80%, SiO 2 The content of Al is 9.56%, Al 2 o 3 The content of carbon dioxide is 38.85%, the reducing agent is blue carbon, and its fixed carbon content is 84.60%. The components of high-iron and high-silicon bauxite and semi-coke are listed in Table 1 and Table 2, respectively.

[0018] Table 1 Chemical composition of a certain high-iron and high-silicon bauxite

[0019]

[0020] Table 2 industrial analysis of the chemical composition of semi-coke for reduction

[0021]

[0022] The implementation steps are as follows:

[0023] (1) Crushing the high-iron and high-silicon bauxite raw ore, silica, and semi-coke with a crusher so that the particle size is not greater than 0.015mm;

[0024] (2) Mix the high-iron and high-silicon bauxite powder, silica powder, and semi-coke powder in a ratio of 100:20:30, and add 4% of the total mass of the material as a binder and 8% of the total mass of the material ...

Embodiment 2

[0030] Select a high-iron and high-silicon bauxite Fe 2 o 3 The content is 25.86%, SiO 2 The content of Al is 12.42%, Al 2 o 3 The content of carbon is 43.59%, the reducing agent is coke, and its fixed carbon content is 86.74%. The high-iron and high-silicon bauxite and coke components are listed in Table 3 and Table 4, respectively.

[0031] Table 3 Chemical composition of a certain high-iron and high-silicon bauxite

[0032]

[0033] Table 4 Industrial Analysis of Chemical Composition of Coke for Reduction

[0034]

[0035] The implementation steps are as follows:

[0036] (1) Crushing the high-iron and high-silicon bauxite raw ore, silica, and coke with a crusher so that the particle size is not greater than 0.015mm;

[0037] (2) Mix high-iron and high-silicon bauxite powder, silica powder, and coke powder in a ratio of 100:10:30, and add 4% binder and 9% water to the mixed material , perform secondary mixing, and stew the mixed material for 40 minutes to make...

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Abstract

The invention relates to a method for preparing an Al-Si-Fe alloy by using high-silicon and high-iron bauxite. The method comprises the steps of breaking a high-ferrum and high-silicon bauxite raw ore and a reducing agent thoroughly; adding an organic adhesive and water; mixing thoroughly; making the above mixture into ellipsoidal particles and drying; adding the dried ellipsoidal particles into an electrothermal furnace; smelting at a reducing atmosphere, a smelting temperature being controlled at 2,000-2,300 DEG C; tapping of the obtained molten iron; directly sending to a casting ingot mold for casting; and cooling to obtain primary Al-Si-Fe alloy. The method provided by the invention has the advantages of high utilization rate of raw materials and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of metallurgical resources, and in particular relates to a method for preparing aluminum-silicon-iron alloys from high-iron and high-silicon bauxite. Background technique [0002] As a composite deoxidizer, aluminum silicon ferroalloy is widely used in steel mills and other enterprises. The density of Al-Si-Fe alloy is higher than that of pure aluminum, it is easy to enter molten steel, and has less internal burning loss. In the process of steelmaking, the use efficiency of aluminum is more than double that of pure aluminum deoxidizer. The low-melting-point inclusions formed during deoxidation with Al-Si-Fe alloy are relatively easy to float to the surface of molten steel, which can reduce impurities in steel, purify molten steel, and improve the quality of molten steel. [0003] The production methods of aluminum silicon ferroalloy mainly include remelting method and hot mixing...

Claims

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Application Information

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IPC IPC(8): C21C7/06C22C1/00C22C30/00
Inventor 柳政根储满生唐珏郭同来
Owner NORTHEASTERN UNIV
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