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Some Geog Questions

Only one question:

Why certain industrial processes are found in some countries?

I would like you guys give the answers in a paragraph,,or in point form

1 個解答

  • 匿名
    1 十年前

    Industrial processes are procedures involving chemical or mechanical steps to aid in the manufacture of an item or items, usually carried out on a very large scale.

    Industrial processes are the key components of heavy industry.

    Most processes make the production of an otherwise rare material vastly cheaper, thus changing it into a commodity; i.e. the process makes it economically feasible for society to use the material on a large scale. One of the best examples of this is the change in aluminium from prices more expensive than silver to its use in recyclable/disposable beverage containers.

    An industrial process differs from a craft, workshop or laboratory process by the scale or investment required. Most of the processes are complex and require large capital investments in machinery, or a substantial amount of raw materials, in comparison to batch or craft processes. Production of a specific material may involve more than one type of process.

    [edit] General processes

    These may be applied on their own, or as part of a larger process.

    Liquefaction of gases - for ease of transportation

    Supercritical drying, Freeze drying - removal of excess liquid

    Scrubber - removing of pollution from exhaust gases

    [edit] Physical reshaping

    There are several processes for reshaping a material by cutting, folding, joining or polishing, developed on a large scale from workshop techniques.

    Forge - the shaping of metal by use of heat and hammer

    Machining - the mechanical cutting and shaping of metal

    Progressive stamping - the production of components from a strip or roll

    Hydroforming - a tube of metal is expanded into a mould under pressure

    Sandblasting - cleaning of a surface using sand or other particles

    Soldering, Brazing, Welding - a process for joining metals

    Tumble polishing - for polishing

    Precipitation hardening - heat treatment used to strengthen malleable materials

    Work hardening - adding strength to metals, alloys, etc.

    Case hardening, Differential hardening, Shot peening - creating a wear resistant surface

    [edit] Moulding

    The shaping of materials by forming their liquid form using a mould.

    Casting, Sand casting - the shaping of molten metal or plastics using a mould

    Sintering, Powder metallurgy - the making of objects from metal or ceramic powder

    Blow moulding as in plastic containers or in the Glass Container Industry - making hollow objects by blowing them into a mould.

    [edit] Purification

    Many materials exist in an impure form, purification, refining or separation provides a usable product.

    Froth flotation, flotation process - separating minerals through floatation

    Fractional distillation, Vacuum distillation - separating materials by their boiling point

    Solvent extraction - dissolving one substance in another

    Frasch process - for extracting molten sulfur from the ground

    [edit] Electrolysis

    The availability of electricity and its effect on materials gave rise to several processes for plating or separating metals.

    Gilding, Electroplating, Anodization, Electrowinning - depositing a material on an electrode

    Electropolishing - the reverse of electroplating

    Electrofocusing - similar to electroplating, but separating molecules

    Electrolytic process - the generic process of using electrolysis

    Electrophoretic deposition - electrolytic deposition of colloidal particals in a liquid medium

    Electrotyping - using electroplating to produce printing plates

    Metallizing, Plating, Spin coating - the generic term for giving non-metals a metallic coating