Magnesium Oxide Cupel

Magnesium Oxide Cupel Description

Magnesium Oxide Cupel is produced from premium-grade raw materials with a unique formulation containing about 96% magnesium oxide and 4% fluxing agents. This composition allows it to absorb more lead oxide than traditional bone ash cupels, resulting in excellent porosity, mechanical strength, and consistent performance. During fire assay and cupellation, the cupel effectively absorbs lead oxide without splashing, leaving behind high-purity gold and silver alloy grains. It maintains structural integrity without cracking or pitting at high temperatures and remains unaffected by humidity or freezing conditions. After use, the precious metal grains can be easily separated from the cupel surface.

Magnesium Oxide Cupel Specifications

Type	Height(H) mm	Top OD(D) mm	Bottom OD(D2) mm	Top ID(D1) mm	Inner Depth(H1) mm	Height of Ridge(H2) mm
2X	17	24	19	18	8	4.5
3	20	26	20	23	5.5	8
4A	22	27	20	24	6	7.5
4	22	29	23	24	6	8
5	26	35	26	27	8	6.5
6A-26	26	40	30	31.2	11.8	6
6A-29	29	40	30	31.2	11.8	9
7A	32	40	30	31.2	11.8	12
7AS(7X)	35	40	30	31.2	11.8	15
7AS-15	32	40	30	32	15	12
8	27.1	44.3	34.6	34.2	8.5	9
8A	35	45	37	38	13	13
8AM	35	45	37	33	12	15
8S	40	44	34	38	14	13
9	30	51	43	40	11	5
9A	34		39		15	14
10	30.2	60	49.7	52.6	11.5	11
11	44	56.8	48.8	47.8	14.8	10
14	70	110	88	80	24	14

Magnesium Oxide Cupel Features

• Premium Raw Materials and Advanced Formulation: Made with high-purity magnesium oxide and precise additives to ensure optimal absorption and consistency in every batch.
• Smooth Surface and Uniform Quality: Each cupel has a dense, even texture with a clean finish, ensuring accurate and repeatable fire assay results.
• Strong Mechanical and Thermal Stability: Maintains structural integrity under high temperatures with excellent resistance to cracking, pitting, and thermal shock.
• Weather-Resistant Performance: Unaffected by humidity or freezing conditions, allowing long-term storage without degradation in quality.
• Efficient Lead Oxide Absorption: Capable of rapidly absorbing a large proportion of lead oxide during cupellation, ensuring high recovery rates of gold and silver.
• Environmentally Safe and Reliable: Free from lead contamination, ensuring clean processing and minimal loss of precious metals.
• Precision Manufacturing and Quality Control: Produced with modern machinery under ISO 9001-certified systems, guaranteeing consistent performance and dimensional accuracy.
• Customizable Options: Heeger Materials (HM) provides high-quality Magnesium Oxide Cupels available in various sizes and specifications, with custom solutions to meet specific testing needs.

Magnesium Oxide Cupel Applications

• Fire Assay Analysis: Used in laboratories for determining precious metal content in ores, concentrates, and alloys through the cupellation process.
• Gold and Silver Refining: Efficiently separates precious metals from lead and other impurities, ensuring accurate recovery of high-purity gold and silver.
• Mining and Metallurgical Testing: Essential for quality control and assay testing in mining operations, smelting plants, and metal refining facilities.
• Analytical Laboratories: Applied in research and testing institutions for reliable quantitative analysis of noble metals.
• Industrial Quality Assurance: Used in production environments where precise metal content verification is required for raw materials and finished products.