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ROY asked in 科學工程學 · 1 decade ago

幾種分離方式的特性

settling amd sedimentation 沉降

flotation 浮選

centrifugal separation 離心分離

filtartion 過濾

請問上面這四種分離方式各自的特性

及分離方法

謝謝

Update:

不好意思

因為這是要考試用的

我怕我自己的翻譯沒到點

能不能給我中文概略的意思

1 Answer

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  • 1 decade ago
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    settling and sedimentation 沉降

    It is valuable for the removal of solids from liquid sewage wastes, getting crystals from what they precipitated from, settling solid food particles from a liquid food, and settling the slurry from a soybean leaching process.

    flotation 浮選

    Flotation is a mineral separation process, which takes place in a water-mineral slurry. The surfaces of selected minerals are made hydrophobic (water-repellent) by conditioning with selective reagents.

    The hydrophobic particles become attached to air bubbles that are introduced into the pulp and are carried to a froth layer above the slurry thereby being separated from the hydrophilic (wetted) particles.

    In addition to the reagents added, the flotation process depends on two main parameters.

    Retention time needed for the separation process to occur determines the volume and number of flotation cells required.

    Agitation and aeration needed for optimum flotation conditions, determine the type of flotation mechanism and the power input required.

    centrifugal separation 離心分離

    Centrifugal Separation is the most widely used method for separating fluids with different densities. It is also used in separating solids from liquids or solids from gasses. To-date , commercially available separators utilizing centrifugal force for separation fall in one of two categories, Rotary Centrifuges or Hydrocyclones

    filtration 過濾

    Filtration is a technique used either to remove impurities from an organic solution or to isolate an organic solid. The two types of filtration commonly used in organic chemistry laboratories are gravity filtration and vacuum or suction filtration.

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