The project addresses the different Dongchuan calcium magnesium oxide refractory nature of the ore copper ore, successfully developed a "high calcium and magnesium refractory oxide copper ore dressing and smelting and efficient new technologies", integrated solutions the key technical problems of its efficient use. The main technical features and innovations are as follows:
1. The study identified the type, structure and embedding characteristics of the combination of copper oxide in the refractory high-calcium-magnesium oxide copper ore. The idea of ​​combining copper oxide was first proposed. For the ore with high oxidation rate and medium-low combination rate, A single flotation process is adopted for the high oxidation rate, high combination rate and high calcium and magnesium "three high" ores.
2. Invented the new process technology of “fine grinding-co-activation-strong capture†of copper oxide ore:
The system activation theory of phase transfer activation, vulcanization promoting activation, micro-dissolution activation and phase change activation was proposed for the first time. A new type of activator was independently developed, which greatly improved the flotation index. A new type of chelate combination collector was developed and synergistically strengthened. Copper oxide ore is collected.
3. Invented the new process technology of "copper oxide mineral normal temperature and atmospheric pressure ammonia leaching-extraction-electrowinning production of copper-copper sulfide mineral flotation production of copper concentrate": the first discovery of NH3-CO2 in copper ammonia solution extraction system According to the influence law of concentration, the critical CO2 concentration was proposed as the criterion for extracting organic phase, which solved the technical bottleneck in the extraction process. The Lix84-100 was replaced by Lix84-I for the first time, and the successful extraction of copper in ammonia solution was realized.
The project systematically completed the whole process of small test, pilot test and industrial test, and realized industrialization in Yunnan Copper (Group) Co., Ltd., and achieved remarkable results in energy saving and emission reduction. Among them, the joint process of metallurgical and metallurgy has established two joint-working enterprises with a scale of 500 tons/day and 1,500 tons/day in Dongchuan. Under the condition of 1.0% of the original ore grade, the total copper recovery rate is 75%. The profit and tax is 124 million yuan, and the total economic benefit for the four years is 496 million yuan. The whole flotation process has been promoted and applied in relevant mines, and the recovery rate is increased by 3-8 percentage points. The annual economic benefit is 159 million yuan, and the new economic benefits for four years are 6.36. 100 million yuan. The total annual economic benefit is 283 million yuan, and the total economic benefits have been 1.132 billion yuan in four years. With this result, three new smelters with a processing capacity of 3,000 tons/day are being built in Dongchuan. The result is a major breakthrough in the domestic and foreign refractory processing of high calcium magnesium oxide copper ore. Five national invention patents have been filed, and the main technology has been authorized by the invention patent. The innovation is outstanding and the advanced is strong, and the overall technology has reached the international leading level. It is recommended to speed up the application and promotion of this technology.
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