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High-purity quartz refers to quartz and its products with extremely high purity of SiO2 and extremely low content of impurity elements.
It is an indispensable and important functional material for industries such as semiconductors, photovoltaics, optical fibers, precision optics, lighting equipment, and new glass
.
Strictly speaking, high-purity quartz is not a kind of mineral, but a product that is purified by using crystal, vein quartz, quartzite, granite pegmatite and other ores as raw materials.
Therefore, it will be able to purify and produce high-purity quartz.
The deposit is more appropriately called high-purity quartz raw material mine
.
1.
What is high purity quartz? However, because different industries require different quality quartz, there is no uniform standard for the quality of high-purity quartz
.
In order to evaluate high-purity quartz raw material ore, scholars at home and abroad have worked hard for many years to find universal quality evaluation indicators
.
Early research believed that the impurity content of high-purity quartz should be less than 50×10-6, that is, the purity of SiO2 should be greater than 99.
995%
.
Chinese scholars believe that quartz with SiO2 purity greater than 99.
9% is high-purity quartz
.
The Norwegian Geological Survey compiled the test data of the country’s high-purity quartz resources and put forward more detailed indicators, requiring that the Al content should be less than 30×10-6 and the Ti content should be less than 50×10-6 under the premise that the total impurity content is less than 50×10-6.
10×10-6, the content of Na and K are less than 8×10-6, the content of Li and Ca are less than 5×10-6, the content of Fe is less than 3×10-6, the content of P is less than 2×10-6, and the content of B Less than 1×10-6
.
In 2014, Flook proposed more reliable quality indicators based on market industry needs, and believed that quartz with SiO2 purity of 99.
95% and total impurity content less than 500×10-6 is high-purity quartz, and quartz with a purity of 99.
5%-99.
8% can meet the requirements.
According to the requirements of the semiconductor filler, optical fiber, and LCD screen production industries, quartz with a purity of less than 99.
5% can be used in the transparent glass industry
.
In recent years, the emerging new glass industries such as photovoltaic glass, Low-E glass, ultra-white float glass, etc.
have reduced the purity requirements of SiO2
.
Therefore, it is reasonable to consider quartz with a purity of SiO2 greater than 99.
9% as high-purity quartz considering the quality of raw ore, testing methods, existing purification technology and industry quality requirements based on these index systems
.
2.
Global resource distribution of high-purity quartz raw material ore According to existing data, the global high-purity quartz raw material ore deposits are distributed in 7 countries including the United States, Norway, Australia, Russia, Mauritania, China, and Canada
.
In addition to China, there are 14 deposits, of which 7 are producing mines and 7 are not yet exploited and produced
.
The Spruce Pine mine in the United States has the largest high-purity quartz raw material resource, exceeding 10 million tons; the smallest resource is the Drag mine in Norway, with only 267,000 tons
.
Because high-purity quartz raw material deposits are extremely scarce, since the beginning of the 21st century, countries around the world have increased their prospecting and ore availability evaluation, and more than ten high-purity quartz raw material deposits have been discovered, but there has not been a comprehensive study on them
.
China is rich in siliceous resources, but most of the mineral deposits are used as ordinary silica ore for ordinary glass, stone, and construction sand
.
In addition, due to the lack of availability evaluation, in the strict sense, China does not have a mine that specializes in producing high-purity quartz raw materials.
Every year, a large amount of high-purity quartz sand, raw ores and high-end quartz products are imported from other countries
.
3.
Global high-purity quartz raw material ore supply pattern and development suggestions At present, the global economic growth is weak, and a new technological revolution is urgently called.
The boost of the world economy depends on the development of new industries such as new energy and new materials
.
The high-end manufacturing industry represented by semiconductor, photovoltaic, optical fiber, new glass and other industries, especially the high-speed construction of the 5G industry, will require high-purity quartz sand and its products with higher purity and greater output
.
(1) The supply pattern of high-purity quartz raw materials and their products will undergo profound changes.
At present, although the Spruce Pine Mine in the United States has a unique baigang rock-type high-purity quartz raw material ore, it provides 90% of the world’s high-purity quartz sand Sibelco also monopolizes the production and sales of IOTA ultra-pure quartz.
It is difficult to find similar deposits in other countries.
However, in recent years, countries have increased their efforts to explore and find more than 10 deposits that can be used as raw materials for high-purity quartz.
, To produce 99.
9% to 99.
999% of low-to-medium-grade high-purity quartz sand, gradually breaking the monopoly pattern of Spruce Pine Mine in the high-purity quartz sand industry
.
(2) The types of high-purity quartz raw materials are diverse, with unique mineralization background.
The types of high-purity quartz raw materials are very wide, including hydrothermal vein quartz, baigangite, pegmatite, and granodiorite.
Weathered residual ore, there are feldspar mica tailings, kaolin tailings, gold tailings and other tailings
.
Although the ore types are diverse, most of the high-purity quartz minerals are produced in Archean-Proterozoic biotite gneiss, granite gneiss, schist and other ancient metamorphic rock series, controlled by Paleozoic-Mesozoic granitic magmatism.
After a long and slow process of deterioration, high-purity quartz of excellent quality has been formed
.
(3) Enlightenment to China First of all, in the direction of prospecting, we should base ourselves on domestic resources and vigorously strengthen the understanding of Archean-Proterozoic metamorphic rock series in the territory, especially the high-purity ones in the Sulu-Dabie UHP metamorphic zone.
Screening and combing of vein quartz, pegmatite and baigangite for glass, strengthening geological survey and quality evaluation; at the same time, attention should be paid to the residual quartz in tailings after mining of granodiorite, pegmatite and kaolin
.
After discovering ore that can be used as a raw material for high-purity quartz, support geological prospecting units and mining enterprises to follow up the prospecting in a timely manner, carry out beneficiation experiments, evaluate resource potential, and estimate resource volume
.
Secondly, in order to protect the high-purity quartz resources required by new innovative industries such as new materials and new energy, China should break the single import channel of high-purity quartz sand and increase imports of high-purity quartz sand and products from Norway, Russia, Australia and other countries.
In addition, support and encourage domestic mining companies to develop high-purity quartz raw material mines in countries such as Mauritania through cooperation, expand the source of high-purity quartz, and maintain national strategic security
.
It is an indispensable and important functional material for industries such as semiconductors, photovoltaics, optical fibers, precision optics, lighting equipment, and new glass
.
Strictly speaking, high-purity quartz is not a kind of mineral, but a product that is purified by using crystal, vein quartz, quartzite, granite pegmatite and other ores as raw materials.
Therefore, it will be able to purify and produce high-purity quartz.
The deposit is more appropriately called high-purity quartz raw material mine
.
1.
What is high purity quartz? However, because different industries require different quality quartz, there is no uniform standard for the quality of high-purity quartz
.
In order to evaluate high-purity quartz raw material ore, scholars at home and abroad have worked hard for many years to find universal quality evaluation indicators
.
Early research believed that the impurity content of high-purity quartz should be less than 50×10-6, that is, the purity of SiO2 should be greater than 99.
995%
.
Chinese scholars believe that quartz with SiO2 purity greater than 99.
9% is high-purity quartz
.
The Norwegian Geological Survey compiled the test data of the country’s high-purity quartz resources and put forward more detailed indicators, requiring that the Al content should be less than 30×10-6 and the Ti content should be less than 50×10-6 under the premise that the total impurity content is less than 50×10-6.
10×10-6, the content of Na and K are less than 8×10-6, the content of Li and Ca are less than 5×10-6, the content of Fe is less than 3×10-6, the content of P is less than 2×10-6, and the content of B Less than 1×10-6
.
In 2014, Flook proposed more reliable quality indicators based on market industry needs, and believed that quartz with SiO2 purity of 99.
95% and total impurity content less than 500×10-6 is high-purity quartz, and quartz with a purity of 99.
5%-99.
8% can meet the requirements.
According to the requirements of the semiconductor filler, optical fiber, and LCD screen production industries, quartz with a purity of less than 99.
5% can be used in the transparent glass industry
.
In recent years, the emerging new glass industries such as photovoltaic glass, Low-E glass, ultra-white float glass, etc.
have reduced the purity requirements of SiO2
.
Therefore, it is reasonable to consider quartz with a purity of SiO2 greater than 99.
9% as high-purity quartz considering the quality of raw ore, testing methods, existing purification technology and industry quality requirements based on these index systems
.
2.
Global resource distribution of high-purity quartz raw material ore According to existing data, the global high-purity quartz raw material ore deposits are distributed in 7 countries including the United States, Norway, Australia, Russia, Mauritania, China, and Canada
.
In addition to China, there are 14 deposits, of which 7 are producing mines and 7 are not yet exploited and produced
.
The Spruce Pine mine in the United States has the largest high-purity quartz raw material resource, exceeding 10 million tons; the smallest resource is the Drag mine in Norway, with only 267,000 tons
.
Because high-purity quartz raw material deposits are extremely scarce, since the beginning of the 21st century, countries around the world have increased their prospecting and ore availability evaluation, and more than ten high-purity quartz raw material deposits have been discovered, but there has not been a comprehensive study on them
.
China is rich in siliceous resources, but most of the mineral deposits are used as ordinary silica ore for ordinary glass, stone, and construction sand
.
In addition, due to the lack of availability evaluation, in the strict sense, China does not have a mine that specializes in producing high-purity quartz raw materials.
Every year, a large amount of high-purity quartz sand, raw ores and high-end quartz products are imported from other countries
.
3.
Global high-purity quartz raw material ore supply pattern and development suggestions At present, the global economic growth is weak, and a new technological revolution is urgently called.
The boost of the world economy depends on the development of new industries such as new energy and new materials
.
The high-end manufacturing industry represented by semiconductor, photovoltaic, optical fiber, new glass and other industries, especially the high-speed construction of the 5G industry, will require high-purity quartz sand and its products with higher purity and greater output
.
(1) The supply pattern of high-purity quartz raw materials and their products will undergo profound changes.
At present, although the Spruce Pine Mine in the United States has a unique baigang rock-type high-purity quartz raw material ore, it provides 90% of the world’s high-purity quartz sand Sibelco also monopolizes the production and sales of IOTA ultra-pure quartz.
It is difficult to find similar deposits in other countries.
However, in recent years, countries have increased their efforts to explore and find more than 10 deposits that can be used as raw materials for high-purity quartz.
, To produce 99.
9% to 99.
999% of low-to-medium-grade high-purity quartz sand, gradually breaking the monopoly pattern of Spruce Pine Mine in the high-purity quartz sand industry
.
(2) The types of high-purity quartz raw materials are diverse, with unique mineralization background.
The types of high-purity quartz raw materials are very wide, including hydrothermal vein quartz, baigangite, pegmatite, and granodiorite.
Weathered residual ore, there are feldspar mica tailings, kaolin tailings, gold tailings and other tailings
.
Although the ore types are diverse, most of the high-purity quartz minerals are produced in Archean-Proterozoic biotite gneiss, granite gneiss, schist and other ancient metamorphic rock series, controlled by Paleozoic-Mesozoic granitic magmatism.
After a long and slow process of deterioration, high-purity quartz of excellent quality has been formed
.
(3) Enlightenment to China First of all, in the direction of prospecting, we should base ourselves on domestic resources and vigorously strengthen the understanding of Archean-Proterozoic metamorphic rock series in the territory, especially the high-purity ones in the Sulu-Dabie UHP metamorphic zone.
Screening and combing of vein quartz, pegmatite and baigangite for glass, strengthening geological survey and quality evaluation; at the same time, attention should be paid to the residual quartz in tailings after mining of granodiorite, pegmatite and kaolin
.
After discovering ore that can be used as a raw material for high-purity quartz, support geological prospecting units and mining enterprises to follow up the prospecting in a timely manner, carry out beneficiation experiments, evaluate resource potential, and estimate resource volume
.
Secondly, in order to protect the high-purity quartz resources required by new innovative industries such as new materials and new energy, China should break the single import channel of high-purity quartz sand and increase imports of high-purity quartz sand and products from Norway, Russia, Australia and other countries.
In addition, support and encourage domestic mining companies to develop high-purity quartz raw material mines in countries such as Mauritania through cooperation, expand the source of high-purity quartz, and maintain national strategic security
.
