國內研制首創采用中頻感應爐精煉技術，在冶煉合金鋼，特殊要求鋼時，可使中頻感應爐由“化鋼”轉變為煉鋼，使其質量指標達到目前的AOD,VOD,LF精煉爐，VD真空脫氣爐的質量水平，是適用于中小爐型冶煉及鑄造企業提高質量，減少廢品的一個重要途徑，是一種投資少，見效快，成本低，質量高的生產工藝，是一種節能降耗的環保型生產工藝，是一種噸流程的生產工藝。本技術是根據不同的鋼種，不同的要求，不同的氣體通過中頻感應爐精煉供氣系統的控制氣體流量，達到去除夾渣物及〖O〗〖N〗〖H〗含量或特殊要求所需脫碳及含氮鋼時吹入氮氣增氧。

    中頻爐吹氬精煉的原理：感應爐底吹氬精煉過程是在鋼液預脫氧完成，取樣分析補加合金料后，將高純度氬氣通過安裝在爐底的氣體擴散器導入鋼液(只會透氣不會滲樓鋼液）當氬氣通過氣體擴散器，分散度較高，具有較大上升速度的氣泡流。無數的氣泡通過鋼液將會把〖O〗〖N〗〖H〗及夾雜物帶出鋼液，從而達到精煉的作用。

   鋼液內部每個氬氣泡就是一個小的“真空室”在氬氣氣泡里不含〖O〗〖N〗〖H〗的氣體，也就是說氬氣泡里面這些氣體的分壓力等于零。

當分壓力很高的氬氣泡穿過鋼液時，呈溶解狀態存在的〖O〗〖N〗〖H〗和非溶解狀態存在的CO等均會自動地進入氬氣泡內，并隨著氣泡上升而溢出，從而達到脫氣的目的，達到去除非金屬夾雜物的目的。

   從2011年8月初開始進行了中頻精煉爐冶煉，精煉后鋼的質量純凈度大大提高，精煉前后的夾雜物對比明顯降低，氣體含量大大減少，具體對比如下：

1、吹氬精煉去除鉛〖pb〗的效果

2、吹氬精煉去氫〖H〗的效果

3、夾雜物：

鋼中非金屬夾雜物顯微評定方法GB10561-2005

現實測標準完全滿足技術要求：

4、氫含量小于1.0ppm，滿足模具鋼要求≦2.5ppm，其他鋼種≦3.0ppm。

5、養含量小于0.0050%。

6、對鋼錠加工后，進行超聲波檢測均達到（GB/T133515-1991)二級標準。

7、對304等不銹鋼精煉與不銹鋼的機械性能對比：（GB/T328-2002)

1)抗拉強度：精煉鋼前549.53Mpa 精煉后606.82Mpa提高57.29Mpa

2)屈服強度：精煉鋼前270Mpa 精煉后339.52Mpa提高69.52Mpa

3)最大力：精煉鋼前38.46pa 精煉后49.10Mpa提高10.64Mpa

本技術實用于感應爐及工頻爐。噸座為0.5T-20T爐體。實用于

1、堿性MgO砂爐襯。2、弱堿性MgO＋AI₂O₃爐襯。3、中性剛玉AI₂O₃爐襯。

4、偏酸性中性AI₂O₃ ＋ SiO2爐襯。5、酸性石英砂爐襯。

本技術不會增加冶煉時間，因為精煉是在加完合金料進行熔化過程中進行精煉，因而不會延冶煉時間，從而也不會增加電耗。

因鋼液經過精煉，使產品質量明顯提高。而成本有所增加。每噸鋼同步增加8.23元。鋼質量的提高、廢品的減少、總的來講成本還是降低的。

Medium frequency induction furnace refining furnace

   The domestic development of the first use of medium frequency induction furnace refining technology, in the smelting of alloy steel, special requirements steel, the medium frequency induction furnace can be transformed from "chemical steel" to steelmaking, so that its quality indicators reach the current AOD, VOD, LF refining furnace, The quality level of VD vacuum degassing furnace is an important way for small and medium-sized furnace smelting and casting enterprises to improve quality and reduce waste. It is a production process with low investment, quick effect, low cost and high quality. It is a kind of production process. An environmentally friendly production process that saves energy and reduces consumption is a production process of a ton process.This technique is based on different steel types, different requirements, different gas refinery desired gas flow control systems for supplying gas through an intermediate frequency induction furnace, slag removal was reached and〖O〗〖N〗〖H〗 content or special requirements Nitrogen is added to the decarburization and nitrogen-containing steel.

The principle of argon refining in intermediate frequency furnace: the argon refining process in the induction furnace bottom is completed in the pre-deoxidation of molten steel. After sampling and analysis, the high-purity argon gas is introduced into the molten steel through the gas diffuser installed at the bottom of the furnace. Will be ventilated will not seep the steel liquid) When argon gas passes through the gas diffuser, the dispersion is higher, and the bubble flow has a larger rising speed. Numerous bubbles passing through the molten steel will bring 〖 O 〗 〖 N 〗 〖 H 〗 and inclusions out of the molten steel to achieve refining.

Each argon bubble inside the molten steel is a small "vacuum chamber" containing no gas of 〖O〗〖N〗〖H〗 in the argon bubble, that is, the partial pressure of these gases in the argon bubble is equal to zero.

When the argon bubble with a high partial pressure passes through the molten steel, the presence of O in the dissolved state, [N], H, and the CO in the insoluble state, will automatically enter the argon bubble, and as the bubble rises. Spilling, in order to achieve the purpose of degassing, to achieve the purpose of removing non-metallic inclusions.

Since the beginning of August 2011, the intermediate frequency refining furnace has been smelted. The purity of the steel after refining has been greatly improved. The contrast of inclusions before and after refining has been significantly reduced, and the gas content has been greatly reduced. The specific comparison is as follows:

1. Effect of argon refining to remove lead 〖 pb 〗

2, the effect of argon refining to hydrogen 〖 H 〗

3, inclusions:

Microscopic evaluation method for non-metallic inclusions in steel GB10561-2005

The actual measurement standard fully meets the technical requirements:

4. The hydrogen content is less than 1.0ppm, which meets the requirements of mold steel ≦2.5ppm, and other steel grades ≦3.0ppm.

5. The nutrient content is less than 0.0050%.

6. After the steel ingot is processed, the ultrasonic testing has reached the secondary standard (GB/T133515-1991).

7. Comparison of mechanical properties of 304 stainless steel refining and stainless steel: (GB/T328-2002)

1) Tensile strength: 549.53Mpa before refining steel, 56.82Mpa after refining, increase 57.29Mpa

2) Yield strength: 270Mpa before refining steel, 339.52Mpa after refining, 69.52Mpa

3) Maximum force: 38.46pa before refining steel, 10.64Mpa after refining 49.10Mpa

The technology is applied to induction furnaces and power frequency furnaces. The tonnage is 0.5T-20T furnace body. Practical use

1. Alkaline MgO sand lining. 2. Weakly alkaline MgO+AI ₂ O ₃ furnace lining. 3. Neutral corundum AI ₂ O ₃ furnace lining.

4. Acidic neutral AI ₂ O ₃ + SiO2 furnace lining. 5. Acidic quartz sand lining.

This technique does not increase the smelting time, because refining is performed during the melting process of the alloy material, so that the smelting time is not extended, and thus the power consumption is not increased.

Due to the refining of the molten steel, the quality of the product is significantly improved. And the cost has increased. Synchronous increase of 8.23 yuan per ton of steel. The improvement of steel quality, the reduction of waste, and the overall cost are still reduced.