Yi Jie Wang

The Progress of Mineral Processing Technology of Lead-Zinc Mine in China

This paper discusses the progress of lead-zinc mineral processing technology and flotation reagents of China, and proposes that optimize technological process and develop new reagents are the main directions.

Beneficiation Experiment Study on Iron Ore in Yunnan Province

In order to provide essential information for enterprises to exploit the iron ore of Yunnan province in China, properties of the ore were analyzed. Experiments of the best grinding fineness analysis and magnetic separation current were conducted. The result show that the ore is martite; when the grinding fineness content below 74um is 95%, and magnetic separation current is 10A (0.8T), iron concentrate with a grade of 65.40% and a recovery of 90.49% can be obtained. Sulfur and phosphorus content in the iron concentrate is 0.057% and 0.011%, respectively.

Recovery Copper from a Complex Copper Sulfide Ore of Yunnan by Using Flotation

Copper ore is the main mineral for the large deposits. Copper minerals are mostly consisting of chalcopyrite, secondly consisting of bornite, there are traces of processing copper blue and malachite, the mineral is disseminated by coarse granularity. This mineral is easy to processing. Production process was using by the process of grinding-flotation. After grinding fineness, lime dosage, sodium sulfide dosage, collector and frother dosage, were determined by the open test. Closed circuit experiment was conducted by those optimal conditions identified in the above test, the recovery of copper concentrate is 88.38% and the grade of copper concentrate is 14.37%.

Recovery Cu from a Copper Oxide Ore by Flotation and Leaching

The copper oxide ore is high oxidation ratio and the high combination ratio with a low grade of Cu 0.71%. Copper concentrate of Cu 15.02% with a recovery of 38.55% was obtained by flotation. The optimum acid leaching conditions were investigated. Effects of lixiviant concentration, solid-to-liquid ratio, leaching time were investigated. The acid leaching efficiency was 78.75% relative to flotation tailings. By the combination of flotation and acid leaching flotation tailings, most of the Cu in the minerals can be enriched, the total recovery of copper reached 86.85%.

A Study on Leaching of Zinc Oxide Ore in Ammonium Sulfate Solution

In this paper, the leaching effect of zinc oxide ore was investigated using ammonium sulfate solution as leaching agent. The effects of temperature, concentration of ammonium sulfate, average particle size and stirring speed on the leaching of zinc oxide ore were studied. The leaching rate increased with increasing solution temperature, concentration, and stirring speed as well as with decreasing average particle size. Ammonium sulfate solution can therefore be used as an effective leaching agent for zinc extraction from zinc oxide ore.

Using of Roasting Leaching Methods for Copper Recovery from a Flotation Concentrate of Yangla Copper Ore

Through earliest experimental study to tailings of Yangla copper ore known that under the best conditions of the flotation process can be obtained a copper concentrate which copper grade of 1.43% and recovery was 29.71%. Due to copper minerals embedded in this materials at a very fine particle size, and closely symbiosis with iron content and quartz, lead to it difficult to enrichment through ore dressing methods. And copper minerals mainly exist in the form of sulfide copper mineral, it can not by leaching method for processing directly, thus put forward a process to deal with this materials of enriched concentrate conduct to sulfuric roasting-leaching, which on the premise of guaranteed cost is not high, ultimately achieve the goal of recycling all kinds of valuable elements. Through the test of low temperature sulphation roasting - leaching to the flotation of copper concentrate shows that under the conditions of temperature of 450 °C for copper concentrate roasting 135 minutes, and after the calcine cooling, then with concentration of 4% sulfuric acid and Liquid-solid ratio of 3:1 leaching of 80 minutes, ultimately available to the test targets of copper leaching rate of around 81%.

Extraction of Copper from a Refractory Copper Oxide Ore by Catalytic Oxidation Acid Leaching

The study aimed to extract copper from copper oxide ores in which copper minerals had a complex association and dissemination with gangue minerals in the form of fine grain by catalytic oxidation acid leaching. Based on the research on the properties of the material and lots of experiments, the leaching process was performed. The optimum parameters of leaching process were determined as sulfuric acid dosage of 150 kg/t, KMnO4 dosage of 1500 g/t, liquid/solid mass ratio of 3 and leaching time of 45 minutes. Under such a condition, the leaching efficiency of 90.15% was achieved, which provided a way to improve leaching efficiency of copper for refractory copper oxide contained some copper sulphide using catalytic oxidation acid leaching.

Influence of Flotation Reagents on Utilization of Complex and Refractory Lead Oxide Ores

The study aimed to explore appropriate flotation reagents to utilize lead minerals from complex and refractory lead oxide ores in Yunnan. Based on the research on the properties of the material, the reagent regime was investigated and a technological flowsheet consisting of one roughing flotation, two scavenging flotation and two concentrate flotation was adopted to perform the closed circuit flotation experiment. The optimum regulator of flotation experiment was determined as sodium silicate, sulfidizing agent as Na2S and collector as isoamyl xanthogenate. Under such a condition of reagent types and their appropriate reagent dosages, a lead recovery of 76.55% with a concentrate grade of 58.67% was obtained, which effectively improved utilization of lead resource.

Effect of Reagent Regime on Flotation Performance of Refractory Oxidized Copper Ores Containing a High Content of Slime

The study aimed to explore appropriate flotation reagents to recover copper minerals from a high content of slime and refractory oxidized copper ores. Based on the research on the properties of the material, the reagent regime was investigated and a technological flowsheet consisting of one roughing flotation, two concentrate flotation, three scavenging flotation and one concentrate-scavenging flotation was adopted to perform the closed circuit floatation experiment. The optimum depressor of flotation experiment was determined as CHO, activator as (NH4)2SO4 and collector as isoamyl xanthogenate. Under such a condition of reagent types and their appropriate reagent dosages, a copper recovery of 75.03% with a concentrate grade of 18.01% was obtained.

Preparation of Novel Magnetic Fluorescent Microspheres Obtained by Chemical Method

The aim of this study is to analyze the properties of microspheres, which was obtained from an iron tailings. The flow-sheet of chemical method consists of chemical co-precipitation of Fe3O4 magnetic microspheres, SiO2 packaged and amino silicon alkylation modification with anthrone under NaBH4 existence. The results show that microspheres can be obtained successfully and it not only has a strong magnetism, but also has a fluorescence effort with the irradiating processing by ultraviolet with a wavelength of 282nm. This microsphere particle is a kind of high-value, environmentally-friendly products, it can be traced and served as a magnetic guide due to its magnetism and fluorescence properties, which has a big potential in medical technology and biological science.