It is a kind of to comprehensively utilize the method that non-calcium chromium slags are directly produced chromium-base alloy steel

It is a kind of to comprehensively utilize the method that non-calcium chromium slags are directly produced chromium-base alloy steel

  • CN 101,906,500 B
  • Filed: 02/05/2010
  • Issued: 06/09/2017
  • Est. Priority Date: 02/05/2010
  • Status: Active Grant
First Claim
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1. It is 1. a kind of to comprehensively utilize the method that non-calcium chromium slags are directly produced chromium-base alloy steel, it is characterised in that:

  • , with non-calcium chromium slags and local great river coal as raw material, slag former is silica, and wherein coal chemistry composition in great river is for it:

    C70%,Fe2O31.29%, MgO 0.75%, CaO 1.08%, SiO210.65%, Al2O34.88%, other compositions 11.35%;

    Silica chemistry intoIt is divided into:

    SiO290.83%, MgO 3.65%, Al2O31.28%, Fe2O30.86%, other compositions 3.38%;

    The electric furnace of application is630kVA DC-ore-heating furnaces, 1.3 tons of capacity, furnace diameter φ

    1.8m, height H1.5m, effective internal diameter φ

    0.95m, effective depthIt is 0.92m, is built by laying bricks or stones using carbon brick and magnesia brick are compound, the electric furnace is powered using bipolar electrode, and specific steps are carried out in the following order:

    1)

    , first to 200kg great rivers coal is added in 1000kg non-calcium chromium slags, mixed material is mixed with mixer;

    2)

    , using nodulizer, in compound under the pressure condition of 200MPa, to be pressed into the spheroid of a diameter of 10-30mm, and will be mixedCompound spheroid drying and dewatering to moisture is less than 3%;

    3)

    , to mixing spheroid in add 110kg silicas, will mixing spheroid and silica mixture input electric furnace carry out fusion smelting,Smelting temperature:

    1500℃



    The duration of heat:

    120 minutes.

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