The biggest feature of the fire-wet combination process is the low production cost. The energy in energy consumption is provided by coal, and the consumption of coal per ton is 160-180Kg. The energy consumption of the fire process electric furnace smelting is more than 80% provided by electric energy, and the electricity consumption per ton of mine is 560-600 kWh. The cost difference between the two energy consumption is very large. According to the current domestic market value, the price difference between the two is 3-4 times. However, there are still many problems in the process. Although the Dajiangshan smelter has been improved many times, the process technology is still not stable enough. After several decades, its production scale still stays at around 10,000 tNi/a. The related patent discloses a technology for recovering nickel from laterite nickel ore. After the crushed nickel ore is crushed, a carbonaceous reducing agent, a composite additive and a laterite nickel ore are mixed in a certain proportion, and the pelletizing machine is used to form a pellet. φ 15 ~ 20mm, dried at 200 ~ 400 ° C for 4 ~ 6h, using rotary kiln reduction roasting, temperature control at 950 ~ 1300 ° C. After reduction roasting, the calcined sand is subjected to coarse and wet ball milling, and then re-elected by a shaker. The obtained nickel concentrate is magnetically selected by a magnetic separator of 3000 to 5000 Gauss, and a high-grade nickel-iron mixture is obtained. Mine, nickel can reach 7% to 15%. The patent discloses a process for the smelting reduction of nickel-iron alloy from laterite nickel ore, pre-reduction of nickel oxide and hematite in laterite nickel ore into metallic nickel and metallic iron or ferroferric oxide, and then using wet magnetic separation to make ferronickel At the same time of large enrichment, the gangue and harmful elements such as sulfur and phosphorus are removed, and finally the nickel-iron concentrate obtained by pre-reduction is smelted and reduced to prepare nickel containing 6% to 10% of nickel and 85% to 90% of iron. For ferroalloys, the nickel yield is greater than 85% and the sulphur phosphorus content is less than 0.03%. The reduction roasting-magnetic separation process is simple, the raw material adaptability is strong, and the nickel recovery rate is high, but the obtained nickel-iron grade is not ideal (the highest is no more than 15%). Various products of Roof And Wall Panel Roll Forming Machine, providing product images and basic parameters with each Roof And Wall Panel Roll Forming Machine and Aluminium Roof Tiles Making Machine; We are a professional Chinese manufacturer of Roof And Wall Panel Roll Forming Machine, and look forward to your cooperation! Wall Panel Roll Forming Machine Wall And Roof Tile Making Machine,Wall And Roof Tile Roll Forming Machine,Wall And Roof Panel Roll Forming Machine,Roof Panel Roll Forming Machine,Wall Panel Roll Forming Machine Cangzhou Feiyang Machiney Manufacturing Co., Ltd. , https://www.coldformingmachines.com
Specific operation examples of reduction roasting-magnetic separation of laterite nickel ore
Fire - Process plant wet nickel oxide combination, world industrial production only Japan metallurgy (NipponYakim) large country's smelter, the ground ore mixed with pulverized coal briquetting, the briquettes dried and high temperature reductive roasting, calcine the obtained milled pulp beneficiated reselection and magnetic separation to obtain a nickel iron alloy products.