In addition to arsenicbeneficiation stage, it is the fundamental way to the comprehensive utilization of arsenic multi-metal mine. In the selection of arsenic is the main method to reduce the arsenic content of the product, so the development and selection of selective arsenic inhibitors is the key to the separation of arsenic and polymetallic minerals. Lime, sodium sulfite, sodium humate, etc. are commonly used and effective inhibitors of toxic arsenic minerals, especially lime, which is widely used as a regulator and inhibitor, which not only inhibits arsate, but also It can also eliminate the activation effect of metal ions in the pulp on the arsenopyrite, and there are many examples of successful production and application. The use of combination inhibitors for complex ores is a trend. As will leadzinc ores Bu r arsenic 2.10%, while use of the three inhibitors, supplemented by a small amount (less than 20g / t) of sodium cyanide, of lead, zinc concentrate arsenic were reduced to 0.10 and 0.60% The ideal level of %. Chifeng wells using silver-copper ore hospital formulated FYS inhibitor combinations, so that arsenic copper concentrate down to 0.30% or less, 0.40% or less industrial index, meet the requirements of smelting, the test results shown in Table 1. In addition, the use of selective collectors is also very important, such as the use of methyl thiourethane and ethyl xanthate mixed or butyl sulphate esters have a significant effect on the separation of copper and arsenic, such as the Xing'an League Lianhua copper mine, with lime and Sodium sulfite is used as an inhibitor, ethyl xanthate and methyl thiourethane are used as collectors to reduce the arsenic content of copper concentrate to less than 0.3%.
Table 1 Test results of various minerals closed /%
Ore name
product
name
Grade
Recovery rate
Remarks
Cu
Pb
Zn
As
Cu
Pb
Zn
Huogeqi lead
Zinc ore
Lead concentrate
Zinc concentrate
62.97
1.04
2.99
44.09
67.96
2.28
2.35
70.41
Lead decarburization, zinc and carbon suppression, less cyanide combination to suppress sulfur, comprehensive recovery of sulfur
A lead
Zinc ore
Lead concentrate
Zinc concentrate
55.98
0.67
4.19
43.71
56.31
6.45
0.34
83.14
Pre- and intermediate decarburization, high alkalinity and sulfur suppression, medium ore treatment alone, comprehensive recovery of sulfur
Houbuhe
Lead-zinc mine
Lead concentrate
Zinc concentrate
63.20
0.49
5.15
50.67
0.60
0.10
78.72
85.82
1.35
0.60
Low cyanide combination agent for suppressing arsenic, sulfur, ethyl sulfide and sulfuric acid, and comprehensive recovery of sulfur and arsenic
Manitou
Metal mine
Copper concentrate
29.03
0.37
89.30
Combined inhibitor arsenic
Chifeng Dajing
Silver copper mine
Copper concentrate
21.80
0.27
94.55
Combined inhibitor arsenic
Scorpion
Lead-zinc mine
Copper concentrate
Lead concentrate
Zinc concentrate
19.24
1.23
0.53
7.67
49.00
0.81
17.69
3.37
46.84
71.79
10.66
7.73
5.58
86.78
2.43
8.09
3.58
83.99
Multi-stage carbon suppression, high alkalinity sulfur suppression, comprehensive recovery of sulfur