Arsenic is a composite pyrite ore, which contains non-ferrous metals and precious metals. As this ore processing volume increases, there is an urgent need to make a choice, either to discard arsenic and tailings together, or to sort it into arsenic products and blended products. The content of rare non-ferrous metals in the arsenopyrite ore is 0.01% to 0.15%. In this ore, gold is mainly colloidal-low-dispersion association with sulfide, and silver is present as sulfonate. Unlike gold, non-ferrous metals and silver are not always symbiotic with arsenic. When the ore is treated by cyanidation in the gold mining department, silver is added to the tailings in the sulfonate, and even non-ferrous metals are lost. The obvious mineralogical characteristics and process characteristics of arsenic pyrite determine that the rare non-ferrous metals and silver must be enriched by preferential flotation in the lowest arsenic-containing individual product for smelting by fire, followed by gold-arsenic. Mineral flotation into the concentrate. Arsenic minerals are mainly pyrite, copper ore, cobalt ore iron-sulfur arsenic. Bismuthinite. The ore is characterized by a high degree of symbiotic relationship between non-ferrous metals and precious metals and arsenic pyrite. In order to separate the minerals as much as possible, the ore is ground to a fraction of 96% to 0.074 mm. Flotation uses amino acids as a collector to separate non-ferrous metals from arsenic. The use of aliphatic and aromatic amino acids in the flotation process separates the non-ferrous metals from the precious metals, which form a virtually arsenic-free complex with the amino acids (see Table 1). Table 1 Flotation results of amino acids used as collectors in ores product name Yield Grade Recovery rate Acid name Cu As Cu As Foam product 0.64 6.42 3.25 68.5 0.50 Butyric acid In-tank product 99.36 0.019 4.50 31.5 99.5 Foam product 0.7 5.48 3.0 63.7 0.5 Aminoacetic acid In-tank product 99.3 0.020 4.25 63.3 99.5 Foam product 1.15 3.94 6.70 75.5 1.7 P-aminobenzoic acid In-tank product 98.85 0.015 4.50 24.5 98.3 Foam product 1.0 4.44 9.0 74.0 1.98 Meta-aminobenzoic acid In-tank product 99.0 0.016 4.5 26.0 98.02 Foam product 1.2 4.10 5.50 82.0 1.5 Phosphatiminobenzoic acid In-tank product 98.8 0.011 4.40 18.0 98.5 Comparison of the effects of certain amino acids (in the form of sodium salts), butylamine, aminoacetic acid, phosphatidinoic acid, m-aminobenzoic acid and p-aminobenzoic acid indicates that phosphatidinoic acid (2-aminobenzoic acid) is the most An effective collector that guarantees high metal recovery in foam products. Cobalt and gold associated with arsenic are recovered into the arsenopyrite concentrate by means of potassium butyl xanthate. The results of the two-stage flotation of the ore using two collectors are shown in Table 2. Table 2 Results of enrichment of non-ferrous metals and arsenic pyrite by flotation of two collectors (%) product name Yield Grade Pharmacy name Au g/ton Ag g/ton Cu Bi Co As Au Ag Cu Bi Co As Foam product I 2.0 27.5 100.0 3.11 4.4 0.28 13.2 20.1 80.4 98.26 78.1 3.7 5.75 Phosphatiminobenzoic acid (pH>5)-250 g/ton Soda-3 kg / ton Copper sulfate - 300 g / ton Butyl xanthate - 120 g / ton T-66-90 g / ton Magnetic acid copper - 150 g / ton Butyl xanthate - 150 g / ton T-66-30 g / ton - Foam Product II 16.8 11.8 1.8 0.002 0.05 0.80 22.8 72.3 12.1 0.5 7.5 89.6 83.4 Intermediate product 2.4 2.1 1.2 0.001 0.02 0.29 15.5 1.8 1.2 0.04 0.4 4.6 8.10 In-tank product 78.8 0.2 0.2 0.001 0.02 0.004 0.16 5.3 6.3 1.2 14.0 2.1 2.75 The free non-ferrous metals and noble metals are enriched in the foam product with anthranilic acid in a yield of from 1.5% to 2.0%. In the first flotation concentrate, the copper, tantalum and silver grades reached 3.11%, 4.40%, 100 g/ton, and the recovery rates were -97%, 80%, 78.10% and 80.4%. The arsenic recovery rate in this product was 5%, it seems that it is necessary to choose the arsenic pyrite from the living body by flotation. When the ore was only butyl xanthate in a mixed flotation, the grades of copper, bismuth and cobalt in the mixed concentrate were 0.8%, 0.3% and 0.95%, respectively. At this time, the arsenic content reached 35%. The second foam product is an arsenopyrite concentrate with an arsenic recovery of 92% and a grade of 22% to 23%. According to the analysis of the data obtained, for the ore with a high content of arsenic pyrite, the two-stage flotation process of two collectors can be recommended. The use of amino acids in the flotation process ensures a certain recovery of free non-ferrous metals and precious metals. The use of xanthate can assist in the enrichment of arsenic pyrite, pyrite and metals associated with it. Palmitic Acid,Acrylic Acid,Palmitic Stearic Acid,Stevia Organic Solvent ShanDong DeXiang International Trade Co.,Ltd , https://www.dexiangchemical.com