An integrated pressure leaching, heap leaching process for recovering copper from sulphidic feed containing iron, arsenic, and copper. Aqueous feed slurry of the sulphidic feed is pressure oxidized to form a liquid phase containing free sulphuric acid and aqueous copper sulphate, and to precipitate arsenic as solid iron arsenic compounds. Treated slurry is withdrawn from the pressure vessel and the liquid phase is separated from the solids. Copper is recovered from the separated liquid phase and generates a solution enriched in acid and depleted in copper. At least a portion of this solution is neutralized in a copper heap leach to produce a PLS containing copper and reduced in acid. At least a portion of the heap leach PLS is neutralized to produce a solution further reduced in acid, and solids containing copper precipitates, followed by a liquid solid separation.

An integrated pressure leaching, heap leaching process for recovering copper from sulphidic feed containing iron, arsenic, and copper. Aqueous feed slurry of the sulphidic feed is pressure oxidized to form a liquid phase containing free sulphuric acid and aqueous copper sulphate, and to precipitate arsenic as solid iron arsenic compounds. Treated slurry is withdrawn from the pressure vessel and the liquid phase is separated from the solids. Copper is recovered from the separated liquid phase and generates a solution enriched in acid and depleted in copper. At least a portion of this solution is neutralized in a copper heap leach to produce a PLS containing copper and reduced in acid. At least a portion of the heap leach PLS is neutralized to produce a solution further reduced in acid, and solids containing copper precipitates, followed by a liquid solid separation.

An integrated pressure leaching, heap leaching process for recovering copper from sulphidic feed containing iron, arsenic, and copper. Aqueous feed slurry of the sulphidic feed is pressure oxidized to form a liquid phase containing free sulphuric acid and aqueous copper sulphate, and to precipitate arsenic as solid iron arsenic compounds. Treated slurry is withdrawn from the pressure vessel and the liquid phase is separated from the solids. Copper is recovered from the separated liquid phase and generates a solution enriched in acid and depleted in copper. At least a portion of this solution is neutralized in a copper heap leach to produce a PLS containing copper and reduced in acid. At least a portion of the heap leach PLS is neutralized to produce a solution further reduced in acid, and solids containing copper precipitates, followed by a liquid solid separation. The solution further reduced in acid is recycled as process solution for the pressure leach, while the solids containing copper precipitates are recycled to combine with either the treated slurry from the pressure leach, or the liquid phase from liquid solid separation, to re-dissolve copper and other metal values. The solids from the latter step are separated and the liquid phase is fed to copper recovery.

An integrated pressure leaching, heap leaching process for recovering copper from sulphidic feed containing iron, arsenic, and copper. Aqueous feed slurry of the sulphidic feed is pressure oxidized to form a liquid phase containing free sulphuric acid and aqueous copper sulphate, and to precipitate arsenic as solid iron arsenic compounds. Treated slurry is withdrawn from the pressure vessel and the liquid phase is separated from the solids. Copper is recovered from the separated liquid phase and generates a solution enriched in acid and depleted in copper. At least a portion of this solution is neutralized in a copper heap leach to produce a PLS containing copper and reduced in acid. At least a portion of the heap leach PLS is neutralized to produce a solution further reduced in acid, and solids containing copper precipitates, followed by a liquid solid separation. The solution further reduced in acid is recycled as process solution for the pressure leach, while the solids containing copper precipitates are recycled to combine with either the treated slurry from the pressure leach, or the liquid phase from liquid solid separation, to re-dissolve copper and other metal values. The solids from the latter step are separated and the liquid phase is fed to copper recovery.

Provided are a removal liquid for removing an oxide of a Group III-V element, an oxidation prevention liquid for preventing the oxidation of an oxide of a Group III-V element or a treatment liquid for treating an oxide of a Group III-V element, each liquid including an acid and a mercapto compound; and a method using each of the same liquids. Further provided are a treatment liquid for treating a semiconductor substrate, including an acid and a mercapto compound, and a method for producing a semiconductor substrate product using the same.

Provided are a removal liquid for removing an oxide of a Group III-V element, an oxidation prevention liquid for preventing the oxidation of an oxide of a Group III-V element or a treatment liquid for treating an oxide of a Group III-V element, each liquid including an acid and a mercapto compound; and a method using each of the same liquids. Further provided are a treatment liquid for treating a semiconductor substrate, including an acid and a mercapto compound, and a method for producing a semiconductor substrate product using the same.

Providing a method for selecting minerals containing arsenic. A peptide comprising an amino acids sequence according to the following formula: (T, S, N, or Q)-(H, P, or W)-(E, or D)-(H, P, W, R, or K)-(L, I, V, F, or A)-(L, I, V, F, or A)-(L, I, V, F, or A)-(T, S, N, or Q)-(H, P, or W)-(L, I, V, F, or A)-(T, S, N, or Q)-(L, I, V, F, or A) wherein one amino acid is respectively selected from each group defined by paired parentheses.

Providing a method for selecting minerals containing arsenic. A peptide comprising an amino acids sequence according to the following formula: (T, S, N, or Q)-(H, P, or W)-(E, or D)-(H, P, W, R, or K)-(L, I, V, F, or A)-(L, I, V, F, or A)-(L, I, V, F, or A)-(T, S, N, or Q)-(H, P, or W)-(L, I, V, F, or A)-(T, S, N, or Q)-(L, I, V, F, or A) wherein one amino acid is respectively selected from each group defined by paired parentheses.

A pyro-metallurgical process for producing at least one non-ferrous metal or a compound thereof, wherein said metal is selected from the group consisting of arsenic (As), antimony (Sb), lead (Pb), cadmium (Cd), mercury (Hg), silver (Ag), tin (Sn), nickel (Ni), and zinc (Zn), and wherein at least one raw material is fed into a rotary kiln, wherein said at least one raw material comprises at least said metal, and wherein said raw material is heated to produce a volatized material, in which the non-ferrous metal or compound thereof is produced from the volatized material, in which process a magnesium-based additive, is additionally fed in the rotary kiln in an amount of between 0.5 wt. % and 9.5 wt. % relative to the total weight of said raw materials, which magnesium-based additive is heated together with said raw material to produce at least the volatized material and a solid product, thereby counteracting ring formation in the rotary kiln.

Provided is a method for selecting arsenic-containing minerals.

A peptide comprising an amino acids sequence according to the following formula:

(T,S,N,Q)-(L,I,V,F,A)-(E,D)-(R,K,N,M,D,C,P,Q,S,E,T,G,W,H,Y)-(L,I,V,F,A)-(R,K,N,M,D,C,P,Q,S,E,T,G,W,H,Y)-(L,I,V,F,A)-(L,I,V,F,A)-(L,I,V,F,A)-(R,H,K)-(T,S,N,Q)-(T,S,N,Q)

wherein one amino acid is respectively selected from each group defined by paired parentheses.