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Gold Prospecting
Do It Yourself (DIY) Projects
Fine grinding .
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<blockquote data-quote="Mike678" data-source="post: 550938" data-attributes="member: 16778"><p>I did work in a metallurgic lab for many years , as a fitter . Mild steel balls would wear away but of course it depends how much they are used. In the lab we had small ball mills , the balls were very hard ferro manganese and nickle ? They had to be got from USA and cost a lot of money . I would go with stainless steel balls as they are easy and cheap to get . Was also thinking of adding some Bocce balls , they are about 70 m.m dia . </p><p></p><p>When the mets. were doing flotation tests , the ore would be finely ground in a stainless steel rod mill . The drum and rods were s/steel . I think the charge was 1 kg . I have a sketch and sizes of these mills , if any body wants a copy . They were turned on rubber rollers but I do not know the rpm .</p></blockquote><p></p>
[QUOTE="Mike678, post: 550938, member: 16778"] I did work in a metallurgic lab for many years , as a fitter . Mild steel balls would wear away but of course it depends how much they are used. In the lab we had small ball mills , the balls were very hard ferro manganese and nickle ? They had to be got from USA and cost a lot of money . I would go with stainless steel balls as they are easy and cheap to get . Was also thinking of adding some Bocce balls , they are about 70 m.m dia . When the mets. were doing flotation tests , the ore would be finely ground in a stainless steel rod mill . The drum and rods were s/steel . I think the charge was 1 kg . I have a sketch and sizes of these mills , if any body wants a copy . They were turned on rubber rollers but I do not know the rpm . [/QUOTE]
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Gold Prospecting
Do It Yourself (DIY) Projects
Fine grinding .
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