Williams Advanced Materials has over 90 years of experience with providing precious metal recovery services to our valued customers. Williams has built a strong reputation for providing industry leading refinery services and the highest precious metal returns. We offer full service refining solutions and total precious metal management with the shortest turnaround times.
Receiving

When precious metal scrap is received at our refineries, it is carefully weighed by two people using calibrated scales accurate to .001 oz. Material items and weights are checked against customers' advised information. Refining data is entered into our computer which generates customer receipt and process control forms.

precious metal receiving and inspection
Preparing for Sampling

A proper sample is representative of the total material, based on a scientific sampling of homogenous materials. Customer material sent to the refineries for reclaim is initially examined by experienced personnel, who choose the best sampling preparation process dependent on the nature of the material received. Processing may involve incineration, milling, screening, chemical leaching or smelting.
Sampling

Precious metal scrap is melted in an electric induction furnace and sampled in its molten state using vacuum sealed glass tubes. This method is preferred rather than driling cast bars, which may be segregated. After the fine screening process, dust is blended using scientifically proven "V" type rotating blenders. Three samples are taken - one for our refinery lab, one for the customer, and one sealed sample for possible umpire.

precious metal sampling
Assaying

Williams utilizes the classic fire assay process for Gold, which is the globally accepted method of choice for maximum accuracy. Platinum, Palladium, Rhodium and Silver are determined by either wet gravimetric or instrumental procedures such as ICAP or Mass Spectroscopy. Assay data is entered into our network computer, which calibrates the actual precious content used for customer settlement.