The advantages of AOD refining

 1. 100% waste stainless steel, or cheap high-carbon ferrochrome and scrap carbon steel can be used as ingredients to make the chromium content in the raw materials meet the requirements of the finished product specifications, which can save most of the time when the electric furnace is used to return to the oxygen blowing process. The micro-carbon ferrochrome or metallic chromium that must be added reduces the cost of raw materials. For example, after a company in the United States adopted the AOD method, the consumption of micro-carbon ferrochromium decreased from 42.75 kg/ton in electric furnace single smelting in 1968 to 4.125 kg/ton. The consumption of silicon-chromium alloy is reduced from 10.125 kg/ton to 2.625 kg/ton, and the total chromium recovery rate reaches 98%, which is more than 10% higher than that of the electric furnace return oxygen blowing method.

2. When the double method of electric furnace and AOD furnace is used to produce stainless steel, only melting and heating are carried out in the electric furnace, so the productivity can be increased by 10-15%. The melting and heating of the electric furnace takes about 2.5-3.0 hours, and the blowing cycle of the AOD furnace is about 70-90 minutes, so two electric furnaces with one AOD furnace can achieve the best match, and the output can be increased by 40-50% compared with the single-refining of the electric furnace.

3. Compared with other secondary stainless steel refining methods, the AOD method has simple equipment and small capital investment, which is about 1/3 of the VOD method.

4. The process control is relatively simple. The vacuum oxygen blowing decarburization method needs to determine the end point through gas phase analysis, and also add a deoxidizer under vacuum, while the AOD method can dilute and decarburize in the atmosphere, and can create slag, measure temperature, and sample, which is much more convenient in comparison. In addition, compared with the electric furnace return oxygen blowing method, the AOD method is easier to smelt ultra-low carbon stainless steel, and can realize process automatic control more stably.

5. The quality of stainless steel smelted by AOD method is not inferior to electric furnace single smelting, and the gas content in the steel is slightly reduced.

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality refractory products are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner!

Article Source:The advantages of AOD refining
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