Website : www.zen-ceramic.com
Liling zen ceramic co., ltd is a professional manufacturer .We have been producing fire assay crucibles ,magnesium cupels and Alumina crucible etc.
Cupel is a porous refractory vessel for absorbing lead oxide (or bismuth oxide) when cupellating lead button (or bismuth button). There are three kinds of cupels commonly used: cement, bone ash cement and magnesia.
①The cement cupel is hard and not easy to crack, but the loss of precious metals during cupellation is larger than the latter two.
②Bone ash cupels made of pure bone ashes are looser and can be used for cupellation of crude gold and alloy gold. Assay analysis generally uses a mixture of bone ashes and cement, which is harder than pure bone ashes, but softer than cement. Using bone ashes-cement cupel for cupellation, the loss of gold and silver is smaller than that of cement cupel. The preparation of ashes is more troublesome, and it can be made through several processes of burning and grinding.
③The loss of precious metals during magnesia cupel cupellation is smaller than the previous two.
The main component of magnesia is magnesia, which is a good refractory material and can resist the erosion of breaking flux. The ashes-cement cupel contains more silicates. After cupellation, small pits will appear on the surface of the cupel, and precious metals will be lost. Using magnesia cupel, there is no such phenomenon , and the surface is very smooth.
WHY CHOOSE US?
We are a professional manufacturer of sample preparation equipment, fire assay equipment and crucible (Clay crucible,Ceramic Crucible,Alumina Crucible,Graphite Crucible,Zirconia Crucible
Quartz Melting Crucible) and cupel (magnesia cupel, bone powder cupel ), with perfect management system and mature production technology.
The crucible, cupel and other fire assay consumables are made of high quality raw materials, high temperature resistance, good thermal conductivity, high melting purity, strong corrosion resistance and long service life.
Our staff of sales and technical support is available to help you in selecting the right protection for your application as well as to provide you with samples of our products for evaluation. We are committed to providing the highest level of customer service, competitive pricing, speedy delivery and a comprehensive, cutting-edge product offering. Our ultimate goal is your satisfaction.
Cell/Whatsapp/WeChat : +86 136 5733 5616
Email : james@zen-ceramic.com
Liling Zen Ceramic Co Ltd
English website : www.zen-ceramic.com
Russia website : www.zenceramic.net
Cellphone web : m.zen-ceramic.com
