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Flotation separation method of microcrystalline graphite and sulphide ore

A technology of microcrystalline graphite and separation method, applied in flotation, solid separation and other directions, can solve problems such as environmental pollution, and achieve the effect of light environmental pressure and low pollution

Inactive Publication Date: 2021-02-23
HUNAN RES INST FOR NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And because conventional flotation inhibits pyrite and other sulfide ores, it usually needs to be carried out under the condition of high alkalinity (adding a large amount of lime), which causes great pollution to the environment.

Method used

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  • Flotation separation method of microcrystalline graphite and sulphide ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The Lutang Microcrystalline Graphite Mine in Chenzhou, Hunan Province was selected. According to the test, the fixed carbon content in the original ore is 68.50%, the sulfur content is 0.75%, the mineral composition of the original ore is mainly graphite, and the metal minerals are pyrite, hematite and trace yellow Copper ore; gangue minerals with higher content are quartz, muscovite, biotite and so on. Due to the fine particle size of the microcrystalline graphite embedding, and the interweaving of sulfide ore and gangue with graphite, the flotation purification of the microcrystalline graphite ore is very difficult. The specific operation steps of this embodiment are as follows:

[0022] (1) Grinding: the raw ore is crushed, and the ball mill grinding obtains the microcrystalline graphite ore powder whose fineness is -0.074mm and accounts for 78%;

[0023] (2) pulping: the microcrystalline graphite ore powder is stirred with water to obtain the microcrystalline graphi...

Embodiment 2

[0027] Select the same raw ore as in Example 1, and the specific operation steps are as follows:

[0028] (1) Grinding: the raw ore is crushed, and the ball mill grinds the ore to obtain the microcrystalline graphite ore powder whose fineness is -0.074mm and accounts for 80%;

[0029] (2) pulping: the microcrystalline graphite ore powder is added with water and stirred to obtain the microcrystalline graphite ore slurry, and the concentration of the ore slurry is 10%;

[0030] (3) Flotation: The flotation operation is the second roughing, one sweeping and five times of beneficiation. The first roughing operation first adds 500g / t of inhibitor etherified starch, stirs for 3min, and then adds 50g / t of MA. Stir for 1min, flotation time is 5min; roughing operation 2 first add 300g / t inhibitor etherified starch, stir for 3min, then add 20g / t MA, stir for 1min, flotation time is 4min; sweeping operation 1 add 200g / t of MA, stirred for 3 minutes, and the flotation time was 3 minutes....

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Abstract

The invention provides a flotation separation method for microcrystalline graphite and sulphide ore. The flotation separation method comprises the following steps of crushing raw ore, and conducting ball-milling and grinding to obtain microcrystalline graphite ore powder with the fineness of -0.074 mm accounting for 60%-95%; adding water into the microcrystalline graphite ore powder, and conducting stirring to obtain microcrystalline graphite ore pulp with the concentration of 8-15%; and sequentially subjecting the microcrystalline graphite ore pulp to roughing operation and scavenging operation to obtain graphite rough concentrate and tailings, discarding the tailings, and subjecting the graphite rough concentrate to regrinding operation, conducting pulping, and then conducting concentration operation, so as to obtain microcrystalline graphite concentrate. According to the method, a green and environment-friendly flotation reagent is adopted, pollution is small, environmental pressureis low, the flotation separation efficiency of the microcrystalline graphite and the sulphide ore can be improved to 94% or above, and on the premise of being green and environment-friendly, flotation purification of the microcrystalline graphite is achieved with low cost and high efficiency.

Description

technical field [0001] The invention relates to the field of mineral processing, in particular to a method for flotation separation of microcrystalline graphite and sulfide ore. Background technique [0002] Graphite is an important strategic resource with excellent performance and a wide range of applications, and the future market demand is also very large. Microcrystalline graphite with large resource reserves and high raw ore grade is a kind of graphite resource, which has the characteristics of good electrical and thermal conductivity and isotropy. Hunan Province is rich in microcrystalline graphite resources, which have very high economic value and good development and application prospects. However, because the grain size of microcrystalline graphite exceeds the lower limit of flotation, and the raw ore contains impurities such as sulfide ore and mica with good floatability, the flotation purification of microcrystalline graphite has always been a difficult problem i...

Claims

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Application Information

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IPC IPC(8): B03D1/001B03D1/02B03D101/02B03D101/00B03D103/02
CPCB03D1/001B03D1/025B03D2201/02B03D2201/007B03D2203/02
Inventor 曾惠明陈代雄杨建文胡波朱雅卓
Owner HUNAN RES INST FOR NONFERROUS METALS
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