How can you separate gold from mercury?

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When using mercury to recover very, fine gold from ore, define what is the best way to separate the gold laden mercury from the ore?

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What is mean by D2 Material used for Die tooling? What are the composition in that?

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The requirement for ASTM A217 Gr. WC9 castings for valves components like Body and Bonnet were Normalising at 920+/- 20 Deg. C and Tempring 780+/- 20 Deg. C The specification calls furnace shall be calibtated within +/-14 deg. C The Heat Chart shows minimum temperature for normalising 900 to 920 Deg. C, but maximum temperature 960-990 Deg. C Tempering 780+/-20 Deg. C is within limits and accepted. Casting having integral test bars, heat trated along with castings passed in chemical znalysis and mechanical properties. Since normalising maximum temperature is not meeting specification, where castings can be salvaged or renormalised and retempered to meet specification. Whether it will have affect on remechanical properties testing

0 Answers   Leader Valves,

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Define what is widman statten structure?

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Water hammer in pipes occur due to ?

0 Answers   NIC,

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Define what are the compositions of brass, how can this metal be heat-treated, define what is the melting point of this metal?

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What is the Difference of ultimate tensile stress of mild steel to ultimate compressive stress ?

0 Answers   NIC,

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we have many gas turbine blades, during the shot blasting process some of shots entrapeed in the cooling hole of blades..how can we remove the shots entrapped in holes????

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where do i get previous question papers of metallurgy?

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Why is chromium molybdenum steels used to build pressure vessels? What is special about the properties of chromium molybdenum steels that make them ideal forpressure vessels?

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Explain super alloys?

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