全站搜索

Smelting application

1.等离子对冶炼应用的实践

Scientists have established a sound plasma smelting theory and solved a series of practical problems related to industrial promotion and application. In terms of metal purity, inclusion distribution and crystal structure, plasma technology is comparable to electroslag remelting, laser and electron beam remelting, vacuum induction melting and other technologies, and even plays a unique role in some fields.

Among the vacuum metallurgical process equipment, the plasma cooling bed smelting technology plays a particularly important role in the preparation of large-scale metal ingots and slabs (such as titanium alloy and special steel). Large domestic steel manufacturing enterprises and scientific research institutions have introduced the equal ion cooling bed furnaces of American retech company and German ALD company. The total power of the plasma gun has reached 3300mw, and the maximum titanium ingot is more than 7 tons.

The effect of plasma cooling bed smelting on removing high and low density inclusions is remarkable, but the process development is difficult, the production cost is high, and the stability is poor, which inhibits the rapid development of plasma smelting technology. In addition, the high-power plasma gun uses a large amount of helium, which puts forward new requirements for the establishment of gas purification and recovery devices. With the development of technology, plasma metallurgy technology has returned to people's vision again.

  • Several basic characteristics of arc plasma smelting
  • 对金属的氧化、还原及合金化作用
  • 提高传热方式及效率
  • 对物质交换和化学反应的作用
  • 对熔体的提纯
  • 对非金属夹杂物的清除
  • 建立化学真空气氛
  • 利用氮气直接对金属进行合金化
  • 工艺适用性及扩展性强

These characteristics of arc plasma smelting process enable it to greatly accelerate the process of heat conduction, material exchange and chemical reaction, so as to strengthen the smelting process. Using gas in this way is a meaningful breakthrough in the conventional concept of the role of gas in the metallurgical field. Arc plasma smelting process has strong compatibility and can be combined with other smelting processes, such as plasma electroslag process, plasma induction remelting process and so on. These characteristics make the plasma remelting process play an irreplaceable role, especially in smelting refractory metals, cultivating refractory metal single crystals, refining active metals, recycling precious metals and so on. With the further research and development of plasma technology, it is believed that it will play an active role in solving more complex problems.

上一篇: 下一篇:

相关推荐

  • Plasma technology R & D background

    2751

    等离子体法是美国在 20 世纪 90 年代开始研发用以处理危险废物的新技术。用于废弃物处理的等离子体是一种惰性气体经过电离形成的气体云, 通常称为物质的第 4 种状态。等离子体体系中含大量正负带电粒子和中性粒子组成。在等离子体系统中, 通入电流使惰性气体, 通过...

    查看全文
  • Definition of solid waste

    2909

    固体废物是指在生产、生活和其他活动中产生的丧失原有利用价值或者虽未丧失利用价值但被抛弃或者放弃的固态、半固态和置于容器中气态的物品、物质以及法律和行政法规规定纳入固体废物管理的物品、物质。不能排入水体的液态废物和不能排入大气的置于容器中的气态废物...

    查看全文
  • What is plasma?

    3410

    随着科学技术的迅猛发展,等离子体技术也迅速发展 起来了,逐渐形成了一个新兴的科技体系。我们都知道, 普通化学反应产生的温度只有二千多度,而在低温等离子体中电子温度可达一万多度以上,足以使气体分子激发电离,产生许多在通常条件下不能发生的化学反应,获得...

    查看全文
  • Current solid waste treatment scheme

    2739

    城市固体废弃物的一般处理方法及其优缺点 当前中国城市生活垃圾的主要收集方式:目前世界各国处理城市垃圾粪便所采用的方法有填埋、焚化、堆肥、以及制取沼气等。 垃圾填埋:垃圾填埋分为一般填埋和卫生填埋两种。前者破坏环境, 污染空气与水源, 多已限制使用;...

    查看全文

您好!请登录

点击取消回复
    展开更多