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

Table 2

Mineral compositions of the sample.

Mineral name	Molecular formula	Weight percent (Wt%)	Area percent (area%)	Particle counts	Mineral number
Quartz	SiO2	72.34	76.85	109448	126686
Pyrite	FeS2	6.50	3.62	7874	9795
Goethite	Fe2O3·H2O	3.33	2.45	5415	7963
Roscoelite	K (V, Al, Mg)2AlSi3O10(OH)2	3.33	3.23	7764	9080
Kaolinite	Al2O3·2SiO2·2H2O	2.98	3.19	6827	8556
Muscovite	KAl2[Si3AlO10] (OH, F)2	2.58	2.54	4348	4796
Barite	BaSO4	1.88	1.17	1348	2036
Dolomite	CaMg(CO3)2	1.74	1.70	1663	1866
Apatite	Ca5(PO4)3(F, Cl, OH)	1.45	1.27	1034	1183
Pyrrhotite	FexSx+1	0.85	0.51	1031	1159
Potash feldspar	K2O·Al2O3·6SiO2	0.21	0.23	385	461
Sphalerite	ZnS	0.14	0.10	86	87
Calcite	CaCO3	0.05	0.05	45	54
Native gold	Au	—	—	1	1
Others	—	2.62	3.09	8902	11566