摘要:
A rectangularly shaped separating element for a vibratory grain separator is made from a single metal plate, and has upright front and rear walls, and side walls, one of which side walls has therein a notch serving as hulled rice outlet, and the other of which has therein a notch servicing as an unhulled rice outlet. The plane, upper surface of the separating element has formed thereon a first plurality of spaced protuberances inclined obliquely to the front wall and the sidewall containing the rice outlet for moving the hulled rice toward the hulled rice outlet, and a second plurality of protuberances inclined obliquely to the front wall and the other side wall for moving the unhulled rice toward the unhulled rice outlet.
摘要:
A vertically disposed unhulled rice lifter is mounted adjacent a stationary frame with its upper end secured against movement relative to and in communication with a hulling section which is secured on the frame above and to one side of a vibratory separating section of the apparatus. Grain from the lifter is hulled between a pair of hulling rolls in the hulling section and is fed downwardly through an air stream on to a vibrating surface on the vibratory separating section. The air stream conveys away hulls and dust from the hulled rice; and the vibrating surface separates the hulled rice grains from any unhulled rice which may have passed through the hulling section. The unhulled portion of grain is then returned to the lifter and the completely hulled grains are conveyed to a storage section.
摘要:
The present invention relates to a method for beneficiation of phosphate rock by a thermal treatment, wherein an appreciable increase in P.sub.2 O.sub.5 and decrease in cadmium contents in the calcined product are achieved. According to the invention, the phosphate rock is contacted with hot gases possessing a temperature in the range of between 700.degree. C. to 1600.degree. C. for a period of below 60 seconds and subsequently the fines are removed by a conventional classification method thus obtaining an up-graded phosphate product with a relatively low cadmium content. The up-graded phosphate product is also characterized by a relatively low sulfide content as well as low organic matter, which are very advantageous in the phosphoric acid manufacture therefrom. One of the advantages of the method is the almost complete recovery of the P.sub.2 O.sub.5 present in the phosphate rock since no slaking for calcium oxide removal is utilized.
摘要翻译:本发明涉及通过热处理对磷酸盐岩进行选矿的方法,其中实现了煅烧产物中P 2 O 5明显增加和镉含量的降低。 根据本发明,磷酸盐岩与温度在700℃至1600℃之间的热气体接触低于60秒的时间,随后通过常规的分级方法除去细粉,从而获得 具有较低镉含量的高级磷酸盐产品。 升级的磷酸盐产品的特征还在于硫化物含量相对较低以及低有机物质,这在其磷酸制造中是非常有利的。 该方法的优点之一是磷酸盐岩中存在的P2O5几乎完全恢复,因为不利用去除氧化钙。
摘要:
A driving device of sorting cylinders for use in a rotary type rice hulling and sorting device, characterized by comprising a hulling part, a pneumatical sorting part and a rotary type sorting part provided with sorting cylinders rotatably installed therein with one end thereof as the feeding side of rice grains to be sorted and the other end thereof as the discharging side of rice hulled and sorted and having a large number of recesses formed on the internal surface thereof and receiving troughs for taking out the rice grains scooped up by said recesses, said hulling part, said pneumatical sorting part and said rotary type sorting part being integrally constructed and interlocked, and the rotational speed of said sorting cylinders being controllable optionally in no connection with the revolution of said hulling part and said pneumatical sorting part.
摘要:
The present invention discloses a novel machine that, by a dry process, will segregate granules of different specific gravities. The machine first segregates the granules as to size, regardless of their specific gravities and regardless of the multiplicity of the sizes (within limits set by the machine). In the next step the machine feeds individual granules side by side ranging progressively from fine to more coarse into a stream of air that ranges in carrying power from low to high in a sequence corresponding to the increasing sizes of the granules that fall through it. The carrying power of the air stream is regulated to convey granules having the same specific gravity to the same container, regardless of the sizes of the granules. Granules of different specific gravities will be deposited in different containers. Thus gold will be segregated from silver, and silver from copper etc. by the present invention.The invention is more fully described in the preceding specification.
摘要:
There is provided a process for the continuous separation of discarded hygiene articles into their components, namely flock and/or cut absorbent materials on the one hand and sheet coverings on the other comprising first tearing the discarded hygiene articles into large pieces and then conducting the pieces over an oscillating sieve surface, preferably over an oscillating sieve device having decreasing mesh widths with the smallest mesh width being so selected that the flocculent and/or cut absorbent material still can fall through while the large pieces of torn covering are always carried off as sieve residues.
摘要:
A system and process for removing the veins from bulk strip tobacco utilizing an attrition mill having a pair of spaced discs therein wherein one of the discs is rotatable and the other is stationary. The attrition mill is utilized to mill the bulk strip tobacco prior to the separation of the veins from the lamina.
摘要:
The titanium and zirconium-based minerals, present in the first stage centrifuge tailings from the hot water process for extraction of bitumen from bituminous sands, may be concentrated by a dry screening process. The tailings are burned off to provide a dry, essentially carbon-free, mineral mixture. By screening the mixture into three streams of different particle size range, silica and clays may be rejected as coarse and fine materials respectively, while titanium and zirconium minerals may be concentrated in the intermediate stream. The titanium and zirconium concentrate stream may be advanced to high tension and magnetic separation steps known in conventional processing of heavy minerals, for further beneficiation.
摘要:
A bark and bedding gravel mixture is dumped into a hopper and moves along an inclined vibratory conveyor onto a screening section which screens limbs and other large chunks of wood from the bark-and-gravel mixture as well as sand-sized particles. The limbs and wood chunks are reduced to chips and stored for later use. The sand is conveyed to an aggregate storage site for reuse as bedding material. The bark-and-gravel mixture is dropped from an outlet of the screening section toward but short of the infeed end of a vibratory conveyor table through an air stream which blows the majority of the gravel and bark onto the table while oversize rocks fall short of the table. The bark-and-rock mixture moves through vibratory action along the table into a gravel channel which is separated from a second, bark channel by a transversely inclined rampway forming a ridge between the two channels. An air stream directed across the gravel channel toward the rampway induces the bark portion of the mixture, which forms a stratified layer over the gravel under vibration, to move up the rampway and into the bark channel as both the bark and gravel travel downstream on the table. Sand is screened from the bark near the downstream end of the bark channel after the bark has been dried. The cleaned and dried bark moves from the downstream end of the bark channel to a hog which reduces the bark chunks to a size suitable for use as fuel. The gravel moves from the downstream end of the gravel channel to the gravel storage area for reuse in bedding a log storage yard.
摘要:
A system is provided for reclaiming usable paper other selected materials from a heterogeneous trash mixture that has previously been shredded to a predetermined size. The trash is deposited on a sloped vibrating screen which permits the passage therethrough of smaller sized trash particles. These particles then pass onto another sloped vibrating screen whereby minutely sized particles may pass therethrough, to be discarded. The smaller sized particles that pass through the first screen, but not the second then enter a chute which has a cross current in the form of an air stream, whereby paper, light sheet plastic and the like are forced from the smaller sized mixture and are delivered onto a conveyor. The larger sized particles that do not pass through the first vibrating screen are delivered onto a trash wheel, which is rotating, and which throws the larger sized particles in a given direction whereby the particles travel a given distance depending upon their weight, or upon their ability to be thrown, with at least the heavier of these larger particles passing through an air screen directed toward a series of bins. The lighter of these larger particles are collected in a bin which is located most closely to the trash wheel, which bin deposits these lighter particles onto the conveyor. Trash which is thrown into an intermediate bin is deposited onto another sloped vibrating screen, whereby larger paper materials are separated from smaller but heavier trash components such as heavier plastics, with the thus separated paper materials also passing onto the conveyor. The conveyor then passes beneath an extractor which removes sheet plastic films and the like therefrom, preferably by means of electrostatic attraction of the plastic films from the paper materials, resulting in paper reclamation having an acceptable minimum percentage (if any) of nonpaper materials therein.