火试金灰吹吐珠现象
火试金灰吹后,关键是要慢慢冷却珠子。否则,由于熔融银能够溶解大量氧气,并在再次凝固时剧烈释放,因此可能会发生发芽或吐出。当发生吐痰时,需要停止化验,因为吐珠现象几乎总是伴随着贵金属的损失。
After cupellation, it is key to slowly cool the beads. Otherwise Sprouting or spitting may occur due to the fact that molten silver is able to dissolve greats amounts of oxygen, and violently releasing it when it solidifies again. When spitting occurs the assays needs to be rejected because the spitting phenomena is nearly always accompanied by a loss of precious metals.
灰吹炉上配有空气进气系统和排烟系统,炉门口上方配有排烟罩。
1、空气进气系统:配有可调鼓风机和进气阀门,来控制空气进气量的大小。
1、排烟罩:开启炉门时,可自动开启炉门口上方的排烟罩,可大幅减少铅粉尘对人体的危害
2、排烟烟道:排烟管道上配有控制阀,可调节出气量大小,放置样品时自动开通炉内空气通道可大幅减少铅粉尘对人体的危害。