1. Introduction

In the iron and steel smelting industry, oxygen lance, as a key equipment, plays a vital role in improving smelting efficiency and steel quality. The hoop oxygen lance, as a special type of oxygen lance, its design and application reflects the advanced and efficient modern metallurgical technology. This paper will introduce the structure, working principle, performance characteristics and application of the hoop oxygen gun in detail.

Structure and Working Principle of 2. Hoop Oxygen Lance

The hoop oxygen gun is mainly composed of three parts: nozzle, gun body and gun tail. The nozzle is made of industrial pure copper and is the most important part of the oxygen lance. Its structure usually adopts a Laval type nozzle to ensure efficient injection of oxygen. The gun body is a concentric seamless steel pipe, the lower end is connected with the nozzle, and the upper end is connected with the gun tail. The gun tail includes oxygen supply, water inlet and drainage branch pipes, connecting flange and sealing rubber ring, which are connected with oxygen pipe network and high-pressure water pipe network of the workshop through the gun tail.

The working principle of the hoop oxygen lance is mainly to use the high concentration and high pressure of oxygen to inject instantaneously to generate high temperature and high speed airflow. The lance receives a high concentration of oxygen from an oxygen source through a high pressure oxygen line, which is compressed to a certain pressure, usually tens to hundreds of bars, in order to be able to have sufficient pressure at the time of injection. Then, these high-pressure oxygen is sprayed out through the nozzle to form a high-speed air flow, and a violent oxidation reaction occurs when contacting with the air, generating a large amount of heat.

Performance Characteristics of 3. Hoop Oxygen Lance

1. High efficiency: The hoop oxygen lance can quickly deliver oxygen to the molten pool through high-pressure oxygen injection, and improve smelting efficiency.
2. Stability: The design of the hoop oxygen lance makes it stable during operation and reduces the loss caused by vibration.
3. Durability: Because the hoop oxygen gun uses high-strength materials and special design, it can withstand high temperatures, resist erosion and resist vibration, thereby extending its service life.
4. Flexibility: The hoop oxygen lance can be flexibly adjusted according to the needs of the smelting process, such as changing the oxygen injection angle, flow and other parameters to meet different smelting needs.

Application of 4. Hoop Oxygen Lance

The hoop oxygen lance is mainly used in the steel smelting industry, especially in the oxygen converter steelmaking process. In converter steelmaking, the hoop oxygen lance can blow high-pressure and high-purity oxygen into the top of the metal molten pool in the converter at supersonic speed, thereby accelerating the oxidation and removal of impurity elements in the molten pool and improving the purity and quality of the steel. In addition, the hoop oxygen lance can also be used in the fields of electric arc furnace and ladle refining furnace to meet the needs of different smelting processes.

5. Conclusion

As the key equipment in the iron and steel smelting industry, the hoop oxygen lance plays an important role in improving the smelting efficiency and steel quality because of its high efficiency, stability, durability and flexibility. With the continuous development of metallurgical technology, the design and performance of the hoop oxygen lance will continue to optimize and improve, and make greater contributions to the sustainable development of the steel smelting industry.