The present invention relates to a multi-step reduction method of low grade nickel ore and a concentration recovery method of nickel using the multi-step reduction method and, more specifically, relates to a multi-step reduction method of the low grade nickel ore comprising: a first reduction step of reducing a nickel-iron contained material by using gas including CO as a reduction gas; and a second reduction step of producing a reduction material for leaching by reducing the nickel-iron contained material to hydrogen gas, and an effective concentration recovery method of nickel including the multi-step reduction method. According to the present invention, the multi-step reduction method of low grade nickel ore performs two reduction steps using CO-included gas and hydrogen gas. Moreover, since hydrogen generated during a concentration recovery process of nickel is used in this case, costs of the process is reduced, and an efficient process is possible to be performed. According to the present invention, the reduction process is performed by multi-steps; thus being possible to decrease a variation of the reduction material in accordance with the quality of non-uniformity material or the like by adjusting the two-step process.
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