For the pitting defect on the strip surface during cold rolled continuous annealing process , integrated with the equipment and technology , the cause of pitting defect was analyzed and the prevention measures were proposed .The results show that the O 2 , the dew points in the annealing furnace and the pulling force out of control lead furnace roller to slip and nodule, which are the main reason of the strip pitting.In actual production, the O2 in furnace holds within 0.003%-0.005%and the dew point in the furnace holds within -30--45℃, and combined with pulling force control, keep the original strip cleanliness and the furnace roller cleaning online can prevent the strip surface from pitting .

Operation regulations of primary argon tower and refining argon tower were presented and causes of fluctuation in the refining argon tower were analyzed.It found out that main causes of the fluctuation were effect of degree of supercooling of liquid nitrogen.The operation was stable after regulation.

Analyzing the reasons of the pure argon column undulation.The measures are taken to return to normal production.

通过分析制氧操作过程中的不稳定因素,优化操作方法,生产高纯氮,提高了经济效益。

This article made the analyses to 15 000 m~(3)/h in the production of the oxygen manufacture machine that exists some questions.It argued the equipment of the plan of raising the quality and the output of the argon.

According to the principle of piping flow measurement,this text combines the concrete solid example and discusses the way of the application of the small flowmeter in the big flow calculation,and points out some important points which is needed to pay attention.

This article introduces the process design which transforms 6000m~3/h oxygenerator into 17 000m~3/h oxygenation project in oxygen making plant.It also recounts several considerations of selecting the air separation unit of oxygenerator.Considering design principles,it expounds the arrangement of air separation plant as well as the piping of Molecular sieve(MS) purification system and its alterations of partial process line.