Abstract
This research focused on the design of a ferrochrome – slag mechanical separator for a company in Harare, Zimbabwe. The company’s current production is 420 tonnes of alloy per month. The aim of project is to raise the production from 420 to 500 tonnes of ferrochrome production per month by introducing a mechanical separator at metal recovery plant that produces 80 tonnes. The difference in specific gravities of ferrochrome and slag is the key principle applied in achieving separation of the two products. The densities of ferrochrome and slag are 6800 kg/ m 3 and 2800kg/ m 3 respectively hence gravity separation method in water medium can be done.
Highlights
The production target of the metal recovery plant at a Harare Company is 500 tonnes per month and the current output is 420 tonnes
Slag is discarded in large quantities as waste during the process of ferrochrome production
Reclaiming ferrochromium metal entrapped in slag seems to be economic
Summary
The production target of the metal recovery plant at a Harare Company is 500 tonnes per month and the current output is 420 tonnes. The crushing, screening and all material handling processes in the plant are effective because they produces at least 10 tonnes of slag ferrochrome material to go for jigging per day and the problem leading to the failure of meeting the target is the final process which is jigging for ferrochrome and Slag separation as it separates 4 tonnes out of 10 tonnes per day. There is a single pneumatic air pulsed jig used for the separation process but it is failing to meet production demands on its own it needs the support of another mechanical separator in order to maximise production to the required target. In order to recover metal, slag has been crushed and subjected to wet magnetic and gravimetric methods [1]
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