The disclosure relates to mineral processing, and more particularly to a copper(II)-ammonia complex ion sulfidization activator, and its preparation and application. A molar ratio of NH.sub.3 to Cu.sup.2+ in the active ingredient of the copper(II)-ammonia complex ion sulfidization activator is 2:1-4:1. The preparation method includes: dropwise adding an ammonia solution to a copper salt solution; and adjusting the mixture to pH 6-7.2 with dilute sulfuric acid to obtain the copper(II)-ammonia complex ion sulfidization activator. During the sulfidization flotation for the copper oxide ore, the copper(II)-ammonia complex ion sulfidization activator is added and mixed uniformly with the ore slurry prior to the introduction of the sulfidizing agent.

Disclosed is a sodium petroleum sulfonate collector for fluorite flotation, comprising sodium petroleum sulfonate and non-polar oil, wherein the molar ratio of the non-polar oil to the sodium petroleum sulfonate is 3.33-5.67, the sodium petroleum sulfonate comprises raw material oil and active substance, the molecular weight of the raw material oil is 350-450, the molecular weight of the sodium petroleum sulfonate is 500-750, the aromatic hydrocarbon comprises benzene ring hydrocarbon and naphthalene ring hydrocarbon, the content of the benzene ring hydrocarbon is 5% to 11%, and the content of the naphthalene ring hydrocarbon is 5% to 5.2%, the raw material oil needs to be sulfonated by sulfur trioxide, and the molar ratio of the aromatic hydrocarbon to the sulfur trioxide in the raw material oil is 2.4 to 5. The sodium petroleum sulfonate collector proposed by this disclosure is both efficient and low temperature resistant.

The present invention relates to the use for ore beneficiation, of at least one derivative of alkoxylated (polyester)amine. The present invention also relates to the flotation pulp and the tailings comprising said product useful for ore beneficiation.

A method for removing soluble and/or colloidal Si-compounds from an aqueous stream of a minerals processing plant is provided. The method includes adding coagulant(s) and/or flocculant(s) and/or flotation chemical(s) to the aqueous stream in order to facilitate formation of flocs comprising at least some of the Si-compounds, and in order to form a treated aqueous stream, subjecting the treated aqueous stream to cleaning flotation in order to separate at least some of the Si-compounds as a cleaning flotation overflow, and removing the cleaning flotation overflow. The cleaning flotation comprises gas bubbles, at least 90% of the gas bubbles having a diameter of from 0.2 to 250 μm.

A flotation method for mineral processing is disclosed. The method for floating includes a first step of using a first carboxymethyl cellulose (CMC) in a first flotation cell, and a subsequent step includes using a second CMC in a subsequent flotation cell, the first and second CMCs having different characteristics. The first flotation cell may be used in at least one rougher stage and/or at least one rougher-scavenger stage of the flotation method, and the subsequent flotation cell may be used in at least one cleaner stage, and/or at least one cleaner scavenger stage, and/or at least one recleaner stage of the flotation method. A product may be obtained, directly or indirectly, by such a method. A mineral processing plant may use at least two CMCs of different characteristics in flotation for mineral processing.

In a method for recovering a copper sulfide concentrate by froth flotation from an ore containing an iron sulfide, wet grinding of the ore with grinding media made of high chromium cast iron alloy having a chromium content of from 10 to 35% by weight is combined with an addition of hydrogen peroxide to the conditioned mineral pulp before or during flotation in order to improve concentrate grade and recovery of copper sulfides.

A method of treating process water of a flotation plant is disclosed. The flotation plant comprises a mineral flotation line and a process water circuit for treating underflow and/or overflow of the flotation line. The process water circuit comprises a gravitational solid-liquid separator for dewatering underflow and/or overflow of the mineral flotation line to separate sediment from supernatant comprising at least water and unrecovered fine particles comprising valuable material; and a recover water tank for collecting process water. According to the method, prior to leading supernatant from the gravitational solid-liquid separator into the recover water tank, it is subjected to cleaning flotation, in which at least 90% of the flotation gas bubbles have a size from 0.2 to 250 μm, in a cleaning flotation unit. An arrangement for treating process water of a flotation plant, and its use are also disclosed.

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.

The invention relates to a magneto-centrifugal flotation cell for ore concentration which reduces water consumption. A disadvantage of conventional flotation cells is the use of a large amount of water, some flotation cells requiring at least 60% water. The present invention uses ore pulp with increased density and viscosity, owing to the application of an axial magnetic field, wherein the Lorentz force, which is the force exerted by an electromagnetic field that receives a charged particle or an electrical current, can be used. The solution is a cell which, in addition to the forces that usually act on conventional flotation cells, uses external forces which, in principle, produce synergy in the separation of ore particles that have different gravitational and magnetic properties.

The present invention discloses thiol compositions containing monothiotricyclodecenes, dithiotricyclodecanes, and intermolecular sulfide compounds, as well as mining chemical collector compositions containing such thiol compositions. Flotation processes for recovering metals, such as copper and molybdenum, from ores using the mining chemical collector compositions also are disclosed.