燃料氣的流動速度   燃料氣的流動速度與火焰的長短有密切關(guān)系，在外混式燃燒器中，燃料氣流速過大，會引起脫火；在半預(yù)混燃燒器中，燃料氣流速過小會引起回火。

There is a close relatihip between the flow velocity and flow velocity of flame fuel gas fuel gas in the length of the outer mixing burner, fuel gas flow rate is too large, will cause the removal of fire; in the semi premixed burner, fuel gas flow rate is too small will cause tempering.

燃料氣，空氣的相對速度   二者之間的相對速度也對混合有極大的影響，速度差越大，混合就越快。從加速混合的角度來說，希望燃料氣和空氣混合時(shí)的速度差大一些比較好。

The relative velocity between two of the fuel gas and the relative velocity of the air has a great influence on the mixing, and the faster the velocity difference, the faster the mixing. From the angle of accelerating mixing, it is hoped that the velocity difference between the mixture of fuel gas and air is much better.

燃料氣流直徑的影響:氣流直徑越大，完全混合的時(shí)間越長。為了加速混合，可以將大股氣流分成若干小股氣流。這就是一些大功率的燃燒器有多個(gè)燃料氣噴嘴的原因。

The effects of the diameter of fuel air airflow larger diameter, the longer the complete mixing. In order to accelerate the mixing, the large strands of airflow can be divided into a number of small strands of air. This why some high-power burners have multiple fuel gas nozzles.

加熱爐能快速加熱，氧化和脫碳少，適用于加熱圓形料坯和鋼管。與行星軋機(jī)相配合，可用來加熱連鑄板坯；也可對某些鋼材進(jìn)行局部加熱。缺點(diǎn)是單位爐長的生產(chǎn)能力低，爐子熱效率較低。

The heating furnace can be heated quickly, with less oxidation and decarburization, and is suitable for heating round billets and steel pipes. It can be used for heating continuous casting slab and heating some steel products. The drawback is that the production capacity of unit furnace length is low and furnace thermal efficiency is low.