The invention relates to a low-grade bauxite positive floatation collecting agent. The collecting agent comprises, by weight, 5-25 parts of gutter oil treating fluid, 65-85 parts of high-iodine fatty acid, 5-8 parts of sodium hydroxide, 0.5-1 part of an MOA emulgator in a mixed preparation manner; and the gutter oil treating fluid is prepared from gutter oil, methyl alcohol or ethyl alcohol, hydroxylammonium chloride and an alkaline solution according to the weight ratio being 5:1:2:1. According to the low-grade bauxite positive floatation collecting agent, the gutter oil is made profitable; pretreatment modification is carried out on the gutter oil, the gutter oil and other agents are compounded to obtain the novel collecting agent, a series of problems such as large agent using amount, difficult foam transportation, poor beneficiation and separation indexes and high cost are solved to a large extent, efficient resource utilization, energy saving, emission reduction, cost reduction and efficiency increasing are facilitated, and the low-grade bauxite positive floatation collecting agent is of great significance in improving comprehensive competitive power of bauxite dressing plants.

Low-grade bauxite positive floatation collecting agent and preparing method thereof

The article presents the research results for the effectiveness of copper extraction from ores of the Satpayev deposit with complex, mixed composition bacterial leaching. The experiments with pre-acidification of copper samples were performed using biological oxidation by A. Ferrooxidans bacterial culture, adapted strain. Biochemical open-ing moes of mineral raw materials using A. Ferrooxidans bacteria of a particular strain adapted to the copper waste composition and capable of oxidizing sulfide and iron-bearing minerals were worked out. The optimal growth conditions for microorganisms in copper mineral pulp medium were established (temperature, pH, S: L.) The highest leaching efficiency, up to 88.65%, was observed in the experiments with preliminary bio-oxidation of samples by A. Ferrooxidans bacterial culture.

/pdf/copper-extraction-from-complex-waste-dumps-by-biochemical-15cmap38.pdf

Copper Extraction from Complex Waste Dumps by Biochemical Leaching Method

The article presents the results of experiments intended to leach copper from ore heaps of complex mineral composition biochemically. The processing of such heaps is complicated due to the presence of oxidized copper minerals among significant fragments of sulfide minerals and iron-calcium silicates. This factor does not allow to perform standard sulfuric acid leaching effectively without the use of additional oxidation catalysts, or to apply beneficiation methods for that kind of raw materials. Use of A. Ferrooxidans bacteria adapted to the composition of the copper dump, as a bio-catalytic agent, significantly accelerates the leaching process and increases the copper recovery degree into the productive solution.

Intensification of copper leaching from heaps using biological oxidation

Homogeneous Catalytic Dissolution of Recalcitrant Chalcopyrite (CuFeS2)

This paper provides an overview of hydrometallurgical copper extraction studies in which liquid extraction technology has been used with four copper deposits of different compositions. The sulfuric acid consumption rate and copper extraction efficiency, which are dependent on the initial content and forms of calcium compounds and other impurities in ore samples, were calculated, and the results are presented herein. It was established that during the leaching process, silicate compounds of alkaline earth metals, in addition to calcium and magnesium carbonate compounds, would affect the levels of sulfuric acid consumption, thereby actively lowering the acidity of the environment. Moreover, these compounds could partially sorb copper ions from sulfuric acid leaching solutions. Thus, the analysis of waste ore samples showed that residual copper is mainly contained in the form of complex silicate complexes. The presence of divalent iron compounds in the composition from one of the deposits also allowed us to perform a biochemical leaching experiment with preliminary oxidation using an Acidithiobacillus ferrooxidans bacterial culture adapted to the ore composition. The use of this biochemical method in the copper leaching process resulted in a significant reduction in sulfuric acid consumption, by 40%, and a copper recovery rate of 87.2%.

/pdf/study-of-factors-affecting-the-copper-ore-leaching-process-2amry6m3.pdf

Study of Factors Affecting the Copper Ore Leaching Process

Catalytic Effects of Red Mud and Acidithiobacillus ferrooxidans on Biodissolution of Pyrite

The invention relates to a bauxite direct flotation collector which is prepared by performing ultrasonic emulsification on an emulsifier, an oleic acid collector, an octyl hydroximic acid collector and kerosene. During the preparation, the mass ratio of the emulsifier, the oleic acid collector, the octyl hydroximic acid collector, kerosene and water is 1:(2-5):(10-15):(10-15):(64-77); the ultrasonic transmitting frequency is 25-30 kHz; and the ultrasonic emulsification period is 30-60 min. The bauxite direct flotation collector is suitable for diasporic bauxite of which the alumina-silica ratio is 3.3-3.4; the bauxite direct flotation collector has high stability, that is, the bauxite direct flotation collector can stably exist in the form of an emulsion for 60 min; basically, emulsion drops d50 are not changed after water is added, and the bauxite direct flotation collector can stably play a role within the ore pulp flotation period; the bauxite direct flotation collector is high in dispersive capacity and sufficiently acts with a mineral, so that flotation indices are obviously improved; and the foamability is high, and foam consists of small and uniform bubbles, so that the consumption of a foaming agent can be lowered and the reagent cost can be reduced.

Bauxite direct flotation collector

The invention discloses a process for floating and recovering asphalt in natural rock asphalite. The process comprises the steps of carrying out wet-type ball milling after crushing the raw natural rock asphalite to obtain ore pulp; and carrying out flotation separation on the ore pulp by taking sodium carbonate as a dispersing agent, water glass as an inhibitor, C6-C18 mixed side chain hydrocarbon as a collecting agent and C6-C26 mixed alcohol as a foaming agent to obtain as asphalt concentrate. The process is low in energy consumption, simple in process flow, free of environment pollution and low in cost; and the concentrate is low in toxin content and suitable for large-scale application, the recovery rate of concentrate asphalt is up to more than 80%, and the concentrate grade is up to more than 85%.

Process for floating and recovering asphalt in natural rock asphalite

The utility model discloses a compound high gradient concentrator of strong magnetism of dielectric, change and supporting driver part including vertical installation, the change is supported by the change backup pad, and be connected with the driver part, it rotates to be used for driving the change, the both sides of change are equipped with magnetic conduction board and coil, be used for forming the high -intensity magnetic field, magnetic conduction inboard side being close to the change still is equipped with the plate electrode, the plate electrode is connected with the high voltage dc source, be used for forming the dielectric field, discrete medium box is equipped with in the change, dielectric rod along change circumference tangential distribution in the medium box, it is parallel with the change plane, the dielectric rod material is the pure iron, and be provided with dielectric layer above that. The utility model discloses use multipurposely magnetism, the electrical property difference of valuable mineral and arteries and veins quarry thing and select separately, solved that valuable mineral is close with water dielectric constant, valuable mineral and arteries and veins quarry thing magnetic contrast be little nevertheless when the electrical property differs greatly, traditional encircle immediately strong magnet separator can not be effectively with the problem of the two separation, ore dressing efficiency and ore dressing precision have been improved to apparent landing.

Compound high gradient concentrator of strong magnetism of dielectric

The invention relates to a beneficiation method for high-phosphor oolitic hematite. The beneficiation method is characterized in that reverse-flotation dephosphorization is carried out by use of a mixed collector which consists of a cationic collector, namely dodecyloxy propyl ether amine, an anionic collector, namely oleic acid, and an emulsifier, namely tween-20 in proportion, wherein after ore-grinding, mixing and size-mixing, once rough concentrationroughing and three-time scavenging are carried out to abandon tailings; rough concentration bottom flow and bottom flow obtained by primary scavenging are combined and six-time concentration is carried out; bottom flow obtained by the last three times of concentration is subjected to centralized concentration and scavenging to abandon the tailings; foams obtained by secondary scavenging and tertiary scavenging are returned to last operation; bottom flow obtained by primary concentration and scavenging and bottom flow obtained by tertiary concentration are combined, and four-time concentration, five-time concentration and six-time concentration are carried out; foams obtained by secondary concentration and scavenging and tertiary concentration and scavenging are returned to the last operation; the mixed collector is good in selectivity, the foams are high in quality, and the tailings are abandoned twice in the flotation process, so that the return pressure of the process is reduced, the problem that foams, due to a large quantity, cannot be smoothly returned in an oxidized ore flotation process is solved, and therefore, the process is smooth, the phosphor content in the iron ore concentrate can be effectively reduced, and the qualified iron ore concentrates which meet industrial application are obtained.

Beneficiation method for high-phosphor oolitic hematite

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