火试金36位石英分金篮

QUARTZ PARTING & ANNEALING BASKETS FOR 49 SAMPLES – QBR-49

Quartz parting & annealing baskets for 49 samples, that allow to carry out the successive parting and gold annealing operations in the same container, and subsitute, both parting flasks, and gold annealing crucibles.

These quartz parting & annealing baskets for 49 samples are capable of withstanding:

• Attack of concentrated nitric acid
• High temperature necessary for annealing (up to 1000ºC)
• Thermal shock due to very low coefficient of thermal expansion.

They are therefore suitable for simultaneously processing the two nitric acid attacks (the first with nitric acid 33%, the second with nitric acid 49%) and then go directly in the gold annealing furnace (after rincing with water).

The quartz thimbles are provided with thin slits to evacuate the nitric acid / distilled water and possess a flange at the top to fit the holes of the basket.

It is possible to supply them as spares in case of breakage. There are two types of quarz thimbles / crucibles and they suit most cornet sizes.

The following parting & annealing baskets configurations are available:

Basket Reference	Dimensions (L x W x H) (mm)	Capacity (samples)	Picture
QBR-9	57x57x70	9 (3 x 3)
QBR-16	72x72x70	16 (4 x 4)
QBR-25	87x87x70	25 (5 x 5)
QBR-36	102x102x70	36 (6 x 6)
QBR-49	117x117x70	49 (7 x 7)

用于49个样品的石英分离和退火篮，允许在同一容器中进行连续分离和金退火操作，并替代分离烧瓶和金退火坩埚。
这些用于49个样品的石英分离和退火篮能够承受：
浓硝酸侵蚀
退火所需的高温（高达1000ºC）
由于非常低的热膨胀系数而产生的热冲击。
因此，它们适用于同时处理两次硝酸侵蚀（一第次用硝酸33%，第二次用硝酸49%），然后直接进入黄金退火炉（用水打磨后）。
石英顶针配有薄狭缝，用于排出硝酸/蒸馏水，顶部有法兰，用于安装篮子的孔。
如果发生破损，可以将其作为备件提供。有两种类型的方形顶针/坩埚，它们适合大多数短号尺寸。