Preparation method of silicon-manganese alloy

A silicon-manganese alloy and molten salt technology, which is applied to electrodes, electrolysis processes, electrolysis components, etc., can solve the problems of volatilization loss of silicon and manganese alloys, increase the cost of silicon-manganese alloys, and complicated operation steps, so as to achieve stable electrolysis process and reduce The effect of energy consumption and process stability

Active Publication Date: 2013-07-10
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0006] The shortcoming of silicon-manganese alloy prior art production method is: (1) the operation step in the production process is more complicated, and dangers such as explosion easily occur
(2) Due to the high temperature required for smelting, the volatilization loss of silicon and manganese alloys is serious during the melting process, and the raw materials are expensive 75% or 90% silica, which increases the cost of silicon-manganese alloys

Method used

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  • Preparation method of silicon-manganese alloy

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Embodiment 1-4

[0018] Embodiment 1-4, as shown in the form:

[0019]

Embodiment

[0021] 1. Preparation of cathode

[0022] Use high-purity SiO 2 powder, or SiO 2 and MnO 2 Mix powder (molar ratio 1:1) as raw material, weigh 1g, SiO 2 and MnO 2 The mixed powder needs to be milled in a ball mill for 3 hours to keep the particle size uniform and the SiO 2 and MnO 2 Mix evenly, and then select appropriate tablet pressure to form tablets, control the sintering temperature to 850°C and sinter in a muffle furnace for 6 hours to enhance the strength of the cathode sheet.

[0023] 2. Molten salt pretreatment

[0024] Weigh 250g of molten salt, in molar ratio CaCl 2 ; NaCl=1:1 weighed, ground and mixed, kept at 100°C for 2h to remove physically adsorbed water, then raised to 400°C for 4h to remove physically bound water. After cooling to 120°C, put it into a vacuum drying oven for later use, and slow down the speed during the heating or cooling process of the molten salt to prevent the molten salt from sintering.

[0025] 3. Pre-electrolysis process

[002...

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Abstract

The invention relates to a preparation method of an alloy, in particular to a preparation method of a silicon-manganese alloy. The preparation method comprises the steps of: preparing a cathode; pretreating a melting salt; pre-electrolyzing; electrolyzing; and washing and drying. The invention has the advantages as follows: all materials are green and pollution-free products; the electrolyzing process is stable and can not generate toxic and harmful gases or substances, the main generated gas is O2; the electrolyzing temperature is lower than the melting point of the alloy; the energy consumption is lower than that in the traditional technology and the serious situation that our country is short of the high-level manganese ore is made up; the electricity consumption is reduced; the reducing agent such as coke does not need to be added in the electrolyzing process so as to reduce the cost; and the process is stable and the compositions of the product can be controlled by regulating proportion of the metal oxide and process parameters.

Description

technical field [0001] The invention relates to an alloy preparation method, in particular to a silicon-manganese alloy preparation method. Background technique [0002] Silicon-manganese alloy is one of the alloys with the widest application and the largest amount, and is one of the important raw materials for steelmaking. 90% of the world's manganese production is consumed in the iron and steel industry. In the production of all steel grades, manganese is an essential element. It is used as an additive in the steelmaking process and plays an important role in the performance of steel mainly in the form of alloying elements. In addition, it can be used as a deoxidizer to improve the deoxidation ability of silicon, and it is also a conventional main desulfurization element, which can prevent hot embrittlement of steel. Manganese stay in steel can increase the strength of steel, so manganese steel is a very hard alloy. The use of this alloy in steelmaking can increase produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/36C25C7/02
Inventor 高筠彭曼华
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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