Method for coarse grain separation and dry-type powdering of granite pegmatite

A technology of dry pulverization and pegmatite, applied in the direction of solid separation, etc., can solve the problems of difficulty in realizing industrial scale production, secondary pollution of materials, and large energy consumption, so as to avoid drying energy consumption, large processing capacity, The effect of reducing energy costs

Inactive Publication Date: 2020-01-03
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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Problems solved by technology

[0005] CN109013057A discloses a method for separating feldspar and quartz from granite rocks. The particle size range of color selection is 0.38mm-8mm. In actual industrial production, the processing capacity of single equipment is small, and the economy is poor, so it is difficult to realize industrialized large-scale production; the steps ( 5) does not

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  • Method for coarse grain separation and dry-type powdering of granite pegmatite
  • Method for coarse grain separation and dry-type powdering of granite pegmatite
  • Method for coarse grain separation and dry-type powdering of granite pegmatite

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Effect test

Embodiment 1

[0033] The test sample is a grano-pegmatite-type feldspar quartz ore in Luoyang, Henan Province, the raw ore grade is k 2 O>7%, Fe 2 o 3<0.13%, using the technological process of the present invention to carry out intelligent photoelectric sorting-high-pressure roller final grinding for purification, sorting and powder making. The intelligent photoelectric sorting control sets the sorting target to hit white, the sensitivity value is 80, the spot value is 20, and the sorting high-pressure air pressure is 0.8MPa. High-pressure roller mill: When the high-pressure roller mill is working, the pressure between the rollers is 4-5MPa, the roller speed is 1.6m / min, and the roll gap is 5-20mm. The fineness of the granular material can be dynamically adjusted and optimized by adjusting the air volume of the classifier and the rotor speed. After the closed-circuit balance between the high-pressure roller mill and the V-type classifier, the cycle load is 150-280%. Feldspar powder 1 wit...

Embodiment 2

[0040] The test sample is a granite pegmatite mine in Turpan, Xinjiang, the raw ore grade is k 2 O>9%, Fe 2 o 3 <0.13%, intelligent photoelectric sorting feeding particle size 2-18mm. The technological process of the present invention is used for testing, and the intelligent photoelectric sorting control sets the sorting target as whitening, the sensitivity value is 55, the spot value is 10, and the sorting high-pressure air pressure is 0.8 MPa. When the high-pressure roller mill is working, the pressure between the rollers is 4-5MPa, the roller speed is 1.6m / min, and the roller gap is 8-20mm. After the closed-circuit balance between the high-pressure roller mill and the V-type classifier, the cycle load is 150-280%. The magnetic field strength of magnetic separation I is 5000-6000kA / m, and the magnetic field strength of magnetic separation II is 7000-10000, which mainly removes magnetic impurities and magnetic minerals during processing. The quartz particles are classifie...

Embodiment 2

[0041] Table 2 Example 2 Granite pegmatite coarse-grained separation index

[0042] sample K 2 O / %

Na 2 O / %

Fe 2 o 3 / %

Al 2 o 3 / %

SiO 2 / %

Yield / % Raw ore 9.78 0.42 0.07 11.51 76.35 100.00 Feldspar 13.37 0.58 0.09 15.64 67.83 73.14 quartz / / 0.002 0.25 99.56 26.86

[0043] It can be seen from Table 2 that after intelligent photoelectric sorting of quartz particles, the yield of feldspar concentrate obtained is 73.14%, and k 2 O content increased from 9.78% of the original ore to 13.37%, k 2 O+Na 2 O is 13.95%, Fe 2 o 3 Content 0.09%. High-pressure roller mill and V-type powder selection closed-circuit pulverization system, feldspar powder-0.180mm products account for 85%, the product is fired at 1200 degrees to a whiteness of 64, and the energy consumption cost of pulverization is 8KWh / t, which is 38% lower than the traditional ball mill pulverization process .

[0044] Intelligent sort...

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Abstract

The invention provides a method for coarse grain separation and dry-type powdering of granite pegmatite. The preparation method comprises the steps that (1) crude ores of granite pegmatite are crushedand graded, so mineral particles 1 with a particle size of 3mm-20mm and mineral particles 2 with a particle size of -3mm are obtained, the mineral particles 1 are processed with photoelectric sorting, and quartz particle concentrate ores and feldspar particle concentrate ores are obtained; (2) the mineral particles 2 and the feldspar particle concentrate ores are processed by a high-pressure rollgrinding-air classification closed-cycle powdering system, so fine grain materials and a gas material mixture are obtained, feldspar powder 1 is obtained after magnetic sorting and purification of the fine grain materials, the gas material mixture is processed by a powder collector for gas-material separation, and feldspar powder 2 is obtained; and (3) the quartz particle concentrate ores are treated by hammer crushing, screening, magnetic sorting and purification, and a quartz product is obtained finally through screening and grading. The method provided by the invention has the beneficial effects of short processes, the small quantity of devices, a large processing amount, a small particle size of the product and the like; energy consumption cost is reduced; and the method can be applied to industrial and large-scape production.

Description

technical field [0001] The invention relates to the technical field of ore dressing, in particular to a dry-process pulverization method of coarse-grained separation of granite pegmatites. Background technique [0002] The main minerals of granite pegmatite are potassium feldspar and plagioclase, and the paragenetic minerals are mainly quartz and muscovite. The feldspar mineral grains in this type of ore are coarse, pure, fleshy red, dense and massive, k 2 O=10-13wt%, Na 2 O=0.3-1.5wt%, SiO 2 =65-72wt%, Fe 2 o 3 <0.15wt%, white quartz SiO 2 >98.5wt%, Fe 2 o 3 <0.15wt%, distributed in feldspar ore in the form of large particles, such as figure 2 As shown, the overall feldspar content of the ore is low k 2 O+Na 2 O<10wt%, the added value of the product is low. In the mining and crushing of granite pegmatite, a large amount of high-quality feldspar and quartz are mixed together to reduce the quality of the two minerals, such as image 3 As shown, it canno...

Claims

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Application Information

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IPC IPC(8): B03B9/00
CPCB03B9/00
Inventor 彭团儿郭珍旭刘广学刘磊程晓峰
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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