quality 'II Tisachie'ved fromz t he fi'ne grain portion IL There;is'yet thepossibly to intermix the finegrainpor tions II-and} andthus to produce-a final product of mediumgquality or "to coordinate both. sifting devices 9 and 15' to each other'so 'that theylproduceth'esarne quality. T Referring'now' to Fig.; Zj'the second apparatusidifiers fro m'the one disclosed in Fig. 1 ,faside'frorn the particular means for controlling thernoto'r; 8,}imerely by the :arrange- "menti'that' the coarsegrain' portio I separated in the 5 prelimin ry sifteif9f' of the reiolvingQmilling' devicejjvhich comprises-the fine' mill' 10'<a href="http://www.coalgrinding.com/project/120TPH-river-stone-sand-making-plant-in-Russiae.html">120TPH river stone sand making plant in Russia</a>,the .elevator14', theimain' sifting'device15fand thebinterrnediatebunker 16', is not "*fed thr'oughgthe 'finemill'16 but'throughthe-intermediate bunker16;YBy thi s'arrangement, the coarse igrain por rtion lxisi 'suitably mixed with,tlieicoarsegrainportion if, in Q'Oraerto divide equally the' fraction proportions Furi i'n' the sa'rne manner as;thermore, this apparatus operat ments are given by example only and not in a limiting sense, the scope of the present invention being determined by the objects and the claims.
In an apparatus for reducing and sifting of goods to be ground, means for pre-breaking said goods, a preliminary sifting device, first means including driving means for conveying said goods discharged from said pre-breaking means to said preliminary sifting device, a fine grinding mill, an intermediate bunker having variable discharge means,<a href="http://www.coalgrinding.com/project/150-200-TPH-limestone-crushing-plant-in-Mozambique.html">150-200 TPH limestone crushing plant in Mozambique</a> a first discharge means of said preliminary sifting device adapted to discharge a first fine grain portion of a first order, second means for conveying a discharge of a first oarse grain portion of a first order from said preliminary sifting device to said fine grinding mill, third means for conveying said goods from said intermediate bunker to said fine grinding mill, a main sifting device, fourth means for conveying the discharge of said fine grinding mill to said main sifting device, a second discharge means of said main sifting device adapted to discharge a second fine grain portion of a second order, and fifth means for conveying a discharge of a second coarse grain portion of a second order from said main sifting device to said intermediate bunker,<a href="http://www.coalgrinding.com/project/150-200th-hard-rock-crushing-plant.html">150-200t/h hard rock crushing plant</a> and a single sensing means responsive to the quantity produced of said fine grain portion of a second order for controlling said driving means of said first conveying means.
The apparatus, as set forth in claim 1, wherein said fourth conveying means include an elevator having a driving motor and said sensing means being responsive to the load of said fine grain portion of a second order conveyed by said elevator.The apparatus, as set forth in claim 1, which includes a sixth means for conveying said coarse grain portion of said first order directly to said fine grinding mill.