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2. gypsum plaster machine

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In addition, the purchaser is necessary for the daily maintenance of sand equipment to the provider for advice. For equipment in the production of intermediate potential problems, the operator should also often summarize, in order to maximize the operation of the equipment in the operation of the problem occurs.Finally, you need to pay attention to the feedback information collected from the peer to the device operation.

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2. gypsum plaster machine

Mechanical braking device of crushing cones of cone crushers, characterized in that, in order to simplify the design of the brake device of cone crusher and to ensure reliable braking of the crushing cone, while simultaneously swinging it, it is made in the form of a hinged joint consisting of a cardan or connecting shaft with spline joints, combined with a disc brake by means of a spherical disk, and placed inside a crusher cone.

7%, and medium-sized mineral deposit accounts for 8.The copper mine reserves of China are not little, but the average grade of China's copper mine only is 0.And traditional copper ore floatation technology has only considered that copper-sulphide ores (comprises primary chalcopyrite, secondary vitreous copper, copper orchid etc.In addition, cupric oxide ore can dissolve in floatation process, need adopt efficiently that the oxide ore collecting agent mixes use with sulfide mineral collector, could improve the rate of recovery and the concentrate quality of whole copper.4%.A sizable part belongs to the vulcanization-oxidization mixing copper ore type, has the advantages that the copper oxygenation efficiency is high and composition is complicated.Therefore, adopt conventional method for floating production of copper concentrate to have problems such as the rate of recovery is low, beneficiation reagent consumption big, deficiency in economic performance.) flotation, and only consider to adopt activator to activate for cupric oxide ore, adopt common sulfide mineral collector to carry out flotation then, floatation process control parameter has only medicament kind concentration and slurry pH, has ignored the vulcanization-oxidization copper mineral and has mixed a series of characteristics in back.87%, all are lower than 1% basically greater than the ultra-large type copper ore grade of 200 tons; It is complicated mineral intergrowth that most copper mine produces resource, and middle-size and small-size ore deposit is in the majority, and large ore deposit only accounts for 2.9%, and small-sized mineral deposit accounts for 88.

Na.sub. See, e.2 O.S.2 O+H.sub., U.sub.3 BO. Pat.sub.sub.S. 3,917,801; 3,953,580; Japanese No.sub.sub.4 +4H.2 SO.sub.4 +H.2 O Na. 4,270,944; 1,944,598, 3,103,412; and 2,855,276.2 SO.sub.sub.2 O. Pat.4H.2B. Nos.3The boric acid is separated from the more readily soluble sodium sulfate by selective crystallization. Nos.3.sub. 7,002,650; U.g.

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