| 摘要 |
Plating and refining agent for melting aluminium brass containing hydrated sodium tetraborate in 25 to 55 % by weight, sodium chloride in 5-20 % by weight, and sodium carbonate and quartzite, characterised in that it contains by weight: 15 to 40 % sodium carbonate, 0.5 to 4.5 % quartzite, 5 to 25 % potassium chloride, 1 to 25 % sodium sulphate and up to 5 % of calcium oxide.
|
