Mark 6 mini mill used in limestone mining

In all the above examples of producing gold bronze flake with a fluorocarbon resin grinding agent, viz. EXarnples I, II, III, IV, V, VI, VII, VIII and XIV, the bronze flake product was desirably clean,mark 6 mini mill bright and free from fines.In each of the foregoing examples, the grinding agent used was in fine powder form. However, in other runs wherein finely divided metal was milled with /8" pellets of fluorinated ethylene propylene and with a rather coarse powder made by grinding these pellets, good flakes were produced, although rather slowly; in these runs, the pieces of fluorinated ethylene propylene seemed to be reinforced by the particles of brass beaten into them so that they did not readily spread out and serve the purpose of a grinding agent. In general, it is preferred to use the fluorocarbon resin grinding agents in finely divided form, as such form is believed to facilitate the desired thin and even spreading of the grinding agent through the feed of finely divided metal in the mill. It is to be understood that the invention is not limited to the procedures and embodiments hereinabove specifically set forth, but may be carried out in other ways without departure from its spirit.A method of making flake metal powder,limestone processing plant comprising dry-milling finelydivided metal to flake form in the presence of a fluorocarbon resin as a grinding agent.A method of making flake metal powder comprising charging a feed of finely-divided metal and a fluorocarbon resin in finely divided form to a ball mill, said fluorocarbon resin being present in a proportion of between about and about 4% of the weight of said feed, and dry-milling said finely-divided metal to flake form in said ball mill in the presence of said fluorocarbon resin. A method of making flake metal powder, comprising wet-milling finely-divided metal to flake form in the presence of a liquid wet-milling vehicle and a fluorocarbon resin as a grinding agent.A method of making flake metal powder, comprising charging a feed of finely-divided metal and a fluorocarbon resin in finely divided form to a ball mill together with an organic liquid wet-milling vehicle, said fluorocarbon resin being present in a proportion of between about 1% and about 10% of the Weight of said feed, and wetmilling said finely-divided metal to flake form in said ball mill.A method of making flake metal powder, comprising grinding finely-divided metal of which at least a major constituent is copper to flake form in the presence of a fluorocarbon resin as a grinding agent.