Study on Vacuum Roasting Pretreatment of Carbonaceous Gold Concentrates Based on Nonoxidation Technology

Figure 3

Schematic of the experimental setup; 1: furnace temperature controller; 2: vacuum tube furnace; 3: temperature sensor; 4: corundum boat; 5: quartz tube; 6: rubber plug; 7: valve; 8: airway; 9: Mai's vacuum gauge; 10: sliding vane rotary vacuum pump; 11: gas collector.