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Fire clay cupel for recovering lead

Cupels should not crack when heated in the muffle and should be so strong that they will not break when handled with the tongs. Good cupels give, a slight metallic ring when struck together after air-drying. It is best to heat cupels slowly in the muffle as this lessens the chance of their cracking.

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Product Details

Product Introduction

A good cupel should be perfectly smooth on the inside, and of the right porosity. If it is too dense, the time of cupellation is prolonged and the temperature of cupellation has to be higher, thus increasing, the loss of silver. If the cupel is too porous it is said that there is danger of a greater loss, due to the ease with which small particles of alloy can pass into the cupel. The bowl of the cupel should be made to hold a weight of lead equal to the weight of the cupel.

1. Made of Magnesite

2. Used for smelting and assaying

3. High thermal shock resistance

4. Magnesia: ≥95%

5. Silica, Silicon dioxide: 0-5%

6. Property: high refractoriness(1100 centigrade degrees),rapid absorption(70%),and recovery rate of 97%-98.5%,easy to use, without milling

High refractoriness (1100 centigrade degree), 70% rapid absorption and recovery rate of 97-98.5%. Without milling.

Typical Chemical Analysis
MgO	≥98.5%
Al2O3	≥1.2%
Working Temperature	1000℃
Specific Gravity	2.35
Porosity	12%-15%
Lead Absorption	70%

Item	Description	Item	Description
6A	Weight: 50-55 grams	8A	Weight: 80-86 g
	Diameter: 40 mm		Diameter: 43-45 mm
	Height: 25 mm		Height: 30-34 mm
7A	Weight: 58-60 g	9A	Weight: 120-123 g
	Diameter: 40 mm		Diameter: 50-52 mm
	Height: 28-30 mm		Height: 30-34 mm
Note :We can provide you the product by you desire.

Product Information

Company Advantages

Philosophy:With excellent quality, firt-class service, honest business

History:We are a company combined with R&D, production and sales wholly,

Quality:We have passed IS0 9001:2005. standard, stable,reliable

Certifications and Patents

FAQ

Why us?

* Professional manufacturer since 1997.
* Strict quality control on production process and tolerance.
* Free samples available
* Customized production based on your drawing or specification
* On-time delivery and reliable support and service
* Inventory available for quick shipment
* We keep confidentiality of all the drawings and business information between us.

Are you a trading company or a manufacturer?

* We are a manufaturer.

Can you provide the free samples?

* Yes,we can offer free sample if we have it in stock,but the courier fee is to be collected.

Do you accept customized production based our specification?

* Yes,we offer OEM and ODM service. Just send us your drawing if you have it. If you don’t have a drawing, just tell us your idea, we will work out the drawing for you.

What's the delivery time?

* 7 working days for standard products 30 days for customized products.

If you have another questions,please feel free to contact us.

Liling Xing Tai Long Special Ceramic Co.,Ltd

Contact: Fanny

Tel: +86 13975373343

0086-0731-23253338

Email: admin@llxtl-china.com

WhatsApp：0086-13975373343

Company address: Shentan Industrial Zone, Liling, Hunan, 412200

Basic Information

Year Established

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Country / Region

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Main Industry

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Enterprise Legal Person

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Best High-end quality Ceramic clay Fire Assay Crucible manufacturers for gold smelting Company - XTL

High-end quality Ceramic clay Fire Assay Crucible manufacturers for gold smelting compared with similar products on the market, it has incomparable outstanding advantages in terms of performance, quality, appearance, etc., and enjoys a good reputation in the market. Xingtailong summarizes the defects of past products and continuously improves them. The specifications of High-end quality Ceramic clay Fire Assay Crucible manufacturers for gold smelting can be customized according to your needs.Fire Assay Crucibles have a higher than normal resistance to cracking under fire assay conditions. Our crucibles are used in laboratories throughout the international marketplace. We have a variety of shapes and sizes available to cater to the specifications required.Our crucibles give longer life, faster melting, constant melting speed, and exceptional resistance to violent changes in temperature.
Quality China Fire Assay Crucible Manufacture And Factory Magnesia Cupel for Melting Gold Manufacturer | XTL

6A 7A 8A China Fire Assay Crucible Manufacture And Factory Magnesia Cupel for Melting Gold compared with similar products on the market, it has incomparable outstanding advantages in terms of performance, quality, appearance, etc., and enjoys a good reputation in the market. Xngtailong summarizes the defects of past products and continuously improves them. The specifications of 6A 7A 8A China Fire Assay Crucible Manufacture And Factory Magnesia Cupel for Melting Gold can be customized according to your needs.Cupel is a porous refractory for absorbing lead oxide when ash blows the lead buckle. The main component of magnesia is magnesium oxide, which is a very good refractory and can resist the erosion of alkaline flux. Lead oxide is a very strong alkaline flux. At high temperatures, the affinity between lead oxide and silica is very strong, which can invade the silicate in the cupel. There is more silicate in the ash cupel and cement cupel. After blowing with this kind of cupel, there will be pits on the surface of the cupel, and precious metals will be lost as a result. Using magnesia cupel, no such phenomenon after ash blowing, the surface is very smooth.
Best Fused silica melting crucible, quartz smelting Clay Crucible Manufacturers bowl for gold and platinum - XTL

Selected quality quartz as materials, combined with advanced ceramic processing workmanship, mainly used for melting platinum, gold, silver, copper and another high temperature alloy, high purity, anti-corrosion, anti strong acid and strong alkali, good hardness, high thermal shock resistance. The main component is SiO2 ≥80%, Al2O3 (≤17%) and other is 3%( K2O, Na2O, Fe2O3), There is no crack after 10 times sudden heat and sudden cold at 1100℃⇌ 20℃, and no crack after 10 times using oxygen cutting gun to spray 1700-1800 flame on the crucible.Fused silica melting crucible, quartz smelting Clay Crucible Manufacturers bowl for gold and platinum compared with similar products on the market, it has incomparable outstanding advantages in terms of performance, quality, appearance, etc., and enjoys a good reputation in the market. Xngtailong summarizes the defects of past products and continuously improves them. The specifications of Fused silica melting crucible, quartz smelting Clay Crucible Manufacturers bowl for gold and platinum can be customized according to your needs.
High Temperature Resistant Lab Fire Assay Clay Crucible for Melting Gold

Our fire assay crucibles give longer life, faster melting, constant melting speed and exceptional resistance to violent changes of temperature.

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