Help Solve 90-10 Bronze Problem: Melting, Solidification, Separation

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The discussion focuses on a problem involving the extraction of copper from a 90-10 bronze alloy, which consists of 900 grams of copper and 100 grams of tin. The goal is to obtain at least 100 grams of copper with a tin content of less than 2 percent. The proposed solution involves a process of melting the bronze, allowing for partial solidification, and then separating the components based on their melting points. The assumption is made that the liquidus and solidus lines are straight, which simplifies the phase separation process. The discussion seeks input on specific methods or procedures to achieve the desired copper purity from the alloy.
dcfan
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Hello,

I have difficulties solving a simple problem and would need some help to solve it. Thx very much in advance for your help, very appreciated ! :)
Here is the problem:

A kilogram of a 90-10 bronze contains 900g copper (100g Sn). Suggest a procedure for obtaining from this bronze at least 100 g copper that will have an analysis of <2 percent tin. Use melting, partial solidification, and separation steps. (Assumes that the liquidus and solidus are straight lines.)

Bronze:

[PLAIN]http://img259.imageshack.us/img259/9738/562cusn.jpg
 
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No ideas someone??
 

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