Low-carbon low-phosphorus nickel-chromium-iron alloy used for stainless acid resistant steel and preparation method thereof
A technology of carbon-low-phosphorus nickel-chromium and acid-resistant steel, which is applied in the field of low-carbon low-phosphorus nickel-chromium-iron alloy and its preparation, can solve the problems of nickel-chromium-iron alloy with high carbon content and high phosphorus content, so as to improve performance, increase metal yield, Effect of lowering carbon content
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Embodiment 1
[0022] Example 1: Produce one ton of a product containing 30% nickel, 10% chromium, carbon≤0.3%, silicon≤1.0%, sulfur≤0.1%, phosphorus≤0.035%, and the balance is iron.
[0023] making process:
[0024] Ingredients; chrome ore: 245kg, containing 45% Cr 2 o 3 , 12% Fe 2 o 3 , 8% SiO 2 , 10% Al 2 o 3 , 16% MgO.
[0025] Silicon-chromium alloy: 100kg, containing 35% chromium, 46% silicon, 0.04% carbon, 0.02% phosphorus, 0.01% sulfur and iron balance.
[0026] Recover 840kg of waste nickel (average nickel content ≥ 35%), among which, the impurity content of silicon, sulfur and phosphorus meets the requirements of the target value.
[0027] Lime 220-260kg (calcium oxide ≥ 80%), fluorite 23-39kg (calcium fluoride ≥ 75%).
[0028] Specific steps are as follows:
[0029] (1) First spread appropriate amount of lime on the bottom of electric arc furnace or submerged arc furnace, then add chrome ore and about 40% waste nickel raw materials for melting.
[0030] (2) Add sili...
Embodiment 2
[0035] Example 2: Using the above method, the nickel-chromium-iron alloy of the present invention is prepared, which contains: 30.15% nickel, 11.20% chromium, 0.1% carbon, 0.06% sulfur, 0.01% phosphorus, and 0.89% silicon.
Embodiment 3
[0036] Example 3: Using the above method, the nickel-chromium-iron alloy of the present invention is prepared, which contains: 25.83% nickel, 10.12% chromium, 0.32% carbon, 0.21% sulfur, 0.027% phosphorus, and 2.0% silicon.
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