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Method for manufacturing high-titanium ferrotitanium

A manufacturing method and technology of ferrotitanium, which is applied in the field of high-titanium ferrotitanium, can solve problems such as insufficient vacuum degree, high ferrotitanium gas content, and pollution of furnace materials, and achieve less inclusions, high titanium recovery rate, and less smelting pollution Effect

Inactive Publication Date: 2008-07-30
南京宝泰特种材料股份有限公司
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  • Abstract
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Problems solved by technology

This method adopts the furnace lining made of fused magnesia, which will still have a weak reaction with titanium at high temperature, pollute the furnace charge, the vacuum degree is not high enough, and the gas content of ferro-titanium is relatively high.
At present, there is no consumable electrode method, especially vacuum consumable melting method

Method used

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  • Method for manufacturing high-titanium ferrotitanium

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] Embodiment, operate according to the process flow chart of Fig. 1.

[0011] 1. Processing technology

[0012] 2. Electrode parameters

[0013] Electrode weight 137.5 kg

[0014] Electrode specification 200*200*1800(mm)

[0015] Titanium theoretical ratio 73.58%

[0016] 3. Process parameters related to smelting

[0017] Melting current 7~8 thousand amperes

[0018] Melting voltage 28~30 volts

[0019] Melting vacuum 1.0~4.5 Pa

[0020] Cooling time 0.75~1 hour

[0021] 4. Based on random sampling results of production experiments (%)

[0022] C S P Si Al Ti N

[0023] Sample 1 0.10 0.005 0.010 0.13 0.32 73.34 0.018

[0024] Sample 2 0.10 0.005 0.011 0.12 0.33 73.49 0.022

[0025] Sample three 0.10 0.005 0.011 0.14 0.35 73.67 0.024 The rest is iron.

[0026] 5. Meet the requirements of ISO5454-1980 (E).

[0027] Vacuum-breaking, air-cooling or water-cooling, crushing to produce high-titanium ferro-titanium.

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Abstract

The invention discloses a method of preparing high-Ti ferrotitanium. Leftover material of pure Ti, Ti crumbs and pure iron can be used as raw materials and then can be cut, broken, washed, and pressed into self-fluxing or consumable electrodes according to the weight proportion of 40 percent to 80 percent of Ti content; and then the product can be achieved by melting and cooling consumable electrodes under vacuum condition. Compared with other production manners, the invention has the advantages of less melting pollution, less inclusion and high Ti recycling rate. By comparing Multi-point sampling after the melting with the components which need to be added according to the theory, the difference value is equal or less than 1 percent, which meets the requirements of ISO 5454-1980 (E).

Description

technical field [0001] The invention relates to a method for manufacturing high-titanium ferro-titanium. Background technique [0002] Ferro-titanium is an intermediate alloy, mainly used in steelmaking, foundry and welding rod coating industry. Commonly used are several ferrotitans with 30%, 40%, and 70% titanium content. Among them, high-titanium ferro-titanium containing 70% titanium has a low melting point (1100°C, about 350°C lower than other ferrotitans). It can save energy when used in steelmaking, and the composition of molten steel is easy to be uniform and has less segregation. [0003] The traditional method of producing ferro-titanium is the aluminothermic method. This process is to fully mix the roasted titanium magnetite concentrate powder with aluminum powder and ferrosilicon powder according to a certain proportion, ignite it with magnesium, and carry out reduction reaction by its own heat source to obtain 25-45% low-titanium ferro-titanium. The content of...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C33/04C22C35/00
Inventor 杭逸夫顾德才葛伟
Owner 南京宝泰特种材料股份有限公司
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