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Method for preparing high-purity pyrite through flotation mass transfer kinetics regulation and control

A high-purity sulfur and kinetic technology, applied in flotation, solid separation and other directions, can solve the problems of not reaching high-purity pyrite, complicated process design, complicated process, etc., and achieve easy industrial production, reasonable process structure, The effect of high product purity

Pending Publication Date: 2022-01-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of this method is complicated, there are many types of additives, the dosage of chemicals is large, and the quality of sulfur concentrate is not high.
Chinese patent CN201010582246.6 adopts the floating magnetic joint process to recover pyrite, pyrrhotite and arsenopyrite respectively. During the roughing process, sulfur and arsenic are separated by adding 3000-4000kg / ton of lime and 2000g / ton of sodium humate. Add sulfuric acid and copper sulfate to activate the flotation arsenopyrite, the process design is more complicated, and the sulfur concentrate obtained is not high in sulfur, which is far from meeting the requirements for preparing high-purity pyrite
Ore slurry heating oxidation method has also been reported for the separation of sulfur and arsenic, but industrial application is difficult

Method used

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  • Method for preparing high-purity pyrite through flotation mass transfer kinetics regulation and control
  • Method for preparing high-purity pyrite through flotation mass transfer kinetics regulation and control

Examples

Experimental program
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Embodiment 1

[0023] Target of treatment: Copper-sulfur flotation separation tailings of Yunnan polymetallic oxygen-sulfur mixed mine

[0024] Copper-sulfur flotation separation tailings is the product in the tank obtained by floating copper sulfide minerals as foam products. Its main chemical components are: S 34.25%, As 5.2%, Fe 30.26%, Cu 0.13%, The main minerals are pyrite, arsenopyrite, pyrrhotite, quartz, calcite, chlorite, etc., specifically as figure 2 shown. The particle size of copper-sulfur flotation separation tailings is -74μm, accounting for 96.5%, of which -18μm accounts for 47.8%, which belongs to fine-grained minerals.

[0025] Mix the ore sample and water in the mixing drum, feed 2 L / min of nitrogen, control the rotation speed at 200 r / min, and mix for 5 minutes to prepare a uniform slurry with a solid mass concentration of 21%, creating a new environment for flotation kinetics. condition. Add 950 g / t of high-efficiency inhibitor, 115 g / t of butyl xanthate and 40 g / t o...

Embodiment 2

[0028] Target of treatment: Inner Mongolia polymetallic sulfide ore flotation tailings

[0029] Flotation tailings is the product in the tank obtained after the copper, lead and zinc sulfide minerals are floated out as foam products. Its main chemical components are: S 33.72%, As 4.6%, Fe 28.79%, Pb 0.15%, Zn 0.35%, the main minerals are pyrite, arsenopyrite, pyrrhotite, quartz, dolomite, etc. The particle size of high-arsenic pyrite is -74μm, accounting for 92.5%, of which -18μm accounts for 45.2%. It is a kind of fine-grained high-arsenic pyrite that is easily oxidized. The ore sample was mixed with water in the mixing drum, 1.5 L / min of nitrogen gas was introduced, and the rotational speed was controlled at 180 r / min. After mixing for 6 minutes, a uniform slurry with a solid mass concentration of 18.5% was prepared to create a good buoyancy. Select the mass transfer kinetics conditions; add 1100 g / t of high-efficiency inhibitor, 155 g / t of xanthate and 45 g / t of terpineol ...

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Abstract

The invention discloses a method for preparing high-purity pyrite through flotation mass transfer kinetics regulation and control, which comprises the steps of slurrying micro-fine-particle high-arsenic pyrite, fully stirring in an inert atmosphere to uniformly disperse particles, transferring into a flotation machine, sequentially adding an efficient inhibitor, a sufficient amount of collecting agent and a foaming agent for roughing, scavenging and finely selecting, well controlling the scavenging operation frequency, the reagent dosage and the flotation time, and finally conducting closed-loop flotation. Products in a first-time fine selection groove and foam products obtained through first-time scavenging are combined and re-selected and then return to roughing operation, and mass transfer dynamics regulation and control blind areas and foam mechanical entrainment are made up. Finally, high-purity pyrite concentrate with the sulfur content greater than 52%, the iron content greater than 44% and the arsenic content less than 0.3% is obtained, and the recovery rate of sulfur is 55-65%. The method has the advantages of being easy to regulate and control, low in medicament consumption, remarkable in economic benefit and the like, and can be widely applied to fine separation of complex non-ferrous metal sulfide minerals.

Description

technical field [0001] The invention belongs to the field of mineral processing engineering, and in particular relates to a method for preparing high-purity pyrite through flotation mass transfer dynamics regulation and control. Background technique [0002] Pyrite is the main raw material for manufacturing sulfuric acid and extracting sulfur, and plays a pivotal role in the national economy. Common minerals in pyrite resources are pyrite, pyrrhotite and marcasite, among which pyrite is the majority. These minerals usually exist in lead-zinc sulfide deposits, copper-tin paragenetic deposits, gold deposits, etc., and are accompanied by arsenopyrite. The sorting process usually adopts the flotation method, using copper, lead, zinc sulfide minerals as foam products, pyrite and arsenopyrite as tailings in principle, and finally obtaining high-arsenic pyrite tailings. Due to the similar crystal structure, surface properties and solution chemical properties of pyrite and arsenop...

Claims

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Application Information

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IPC IPC(8): B03D1/14B03D1/02B03D1/018B03D101/02B03D101/04B03D101/06B03D103/02
CPCB03D1/14B03D1/02B03D1/018B03D2201/06B03D2201/04B03D2201/02B03D2203/02Y02P10/20
Inventor 郑永兴吕晋芳胡盘金
Owner KUNMING UNIV OF SCI & TECH
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