Method for melting copper by using waste copper and concentrate of copper sulfide as raw materials
A technology of waste miscellaneous copper and copper sulfide, applied in the field of copper smelting, can solve the problems of short furnace life, low smelting intensity, frequent operation, etc., and achieve the effect of improving furnace processing capacity, complete separation, and reducing investment
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Embodiment 1
[0029] Annually process 40,000t of scrap copper with an average copper content of 50% and 200,000t of copper with 20%, iron with 19.7%, and SiO 2 11% copper sulfide concentrate as an example, specifically:
[0030] Waste miscellaneous copper, copper sulfide concentrate, quartz sand (SiO 2 content 85%), return materials (smoke containing 3% copper) are mixed at a mass ratio of 1:5:0.18:0.1, and the mixed material is put into the top-blowing furnace at 40 tons / h, and the volume concentration is 68%. Oxygen air according to 9800Nm 3 The amount per hour is blown into the molten pool with a spray gun to keep the melt in a strong stirring state, and anthracite (27MJ / kg) is added to control the temperature of the melt in the furnace to 1170-1210°C. Oxygen undergoes a strong oxidation reaction, and the reaction heat generated is the main source of smelting heat income. The insufficient part of heat energy is supplemented by the addition of anthracite fuel. The melt is intermittent...
Embodiment 2
[0032] Annually process 300,000 tons of waste miscellaneous copper containing 15% copper and 500,000 tons containing 21% copper, 22.6% iron, and SiO 2 9% Copper Sulfide Concentrate Example:
[0033] Waste miscellaneous copper, copper sulfide concentrate, quartz stone (SiO 2 content 90%), return materials (smog containing 2.8% copper) are mixed in a mass ratio of 1: 1.66: 0.14: 0.05, and the mixed charge is put into the ISA furnace at 120 tons / h, and the oxygen content is 72% ( volume concentration) of oxygen-enriched air at 13300Nm 3 The amount per hour is blown into the molten pool to keep the melt in a strong stirring state, and coke is added to control the temperature of the melt in the furnace at 1160°C to 1200°C, and the sulfur and iron elements in the melt have a strong interaction with the blown oxygen. Oxidation reaction, the reaction heat generated is the main source of smelting heat income, the insufficient part of heat energy is supplemented by the added coke, the...
Embodiment 3
[0035] Annually process 300,000 tons of waste miscellaneous copper containing 15% copper and 500,000 tons containing 21% copper, 22.6% iron, and SiO 2 9% Copper Sulphide Concentrate Example.
[0036] According to the mass ratio of scrap copper copper content: copper sulfide concentrate copper content = 1: 1.3, scrap copper and copper sulfide concentrate are mixed; according to the Fe in the mixture: SiO 2 =1:1.1 mass ratio, add quartz stone in the mixture; put the mixture into the ISA furnace at 120 tons / h, and feed oxygen-enriched air with an oxygen content of 85% (volume concentration) at 13300Nm 3The amount of / h is blown into the molten pool to keep the melt in a state of strong stirring, and heavy oil is added to control the temperature of the melt in the furnace to 1160 ° C ~ 1200 ° C, and the sulfur and iron elements in the melt have a strong interaction with the blown oxygen. Oxidation reaction, the reaction heat generated is the main source of smelting heat income, t...
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