Need to be translated into English, urgent! ! ! thank you ! But please don't use machine translation!

Good professional, metallurgical English vocabulary, give up decisively. It's hard to get high marks, hehe, I'll try to see if you are serious.

The material must be put into the refining furnace when the ratio of aluminum ingot to casting return material is 7:3. After each throwing, the raw materials must be refined, and the temperature of molten aluminum in the refining furnace must be kept above 700 degrees.

When people change shifts, they must strictly control the temperature of the holding furnace and the amount of molten aluminum in the crucible, and close the valve of the refining furnace when cleaning the workplace. The temperature of molten aluminum in the holding furnace should be kept between 640 and 680 degrees. The retention of molten aluminum in the crucible in the holding equipment must be less than 40 mm or 50 mm from the crucible mouth. You see, the translation is not good, please forgive me, after all, it is a strange subject. If there is any reward, if it is a beautiful woman, kiss it, haha, just kidding, I hope it will be useful to you.