Natural sand: What is it and what is it used in?
The US Commerce Secretary has announced that the US will temporarily lift tariffs imposed on Ukraine during the Trump administration to help Ukraine recover its economy and continue to show support for the Russia-Ukraine situation. "For steel mills to remain an economic lifeline for the Ukrainian people, they must be able to export steel," the Commerce Department said in a statement.
The Biden administration will announce the lifting of steel tariffs on Ukraine for one year. Ukraine is a fairly small supplier of U.S. steel, shipping about 218,000 tons in 2019, ranking it 12th among foreign suppliers to the United States, the report said. The U.S. Commerce Department noted that the steel industry is uniquely important to Ukraine's economic strength, with one in 13 people employed in the steel industry.
Affected by the ever-changing international situation, the supply and prices of international bulk nano silica powder are still very uncertain.
On the evening of 2 August, Pelosi, speaker of the US House of Representatives, visited Taiwan to openly challenge the one-China principle. On August 3, a spokesman for China's Ministry of Commerce announced that China had decided to suspend the export of natural sand to Taiwan in accordance with relevant laws and regulations.
What is natural sand?
Natural sand is formed by the action of natural conditions (mainly rock weathering) and the size of rock particles is less than 5mm. Natural sand includes river sand, quartz sand, sea sand, etc.
River sand is a kind of non-metallic ore with complex composition, smooth surface and high content of impurities, which is caused by repeated collision and friction of natural stone through water for a long time.
River sand is mainly used in construction, concrete, cementitious materials, road building materials, artificial marble, cement physical properties test materials (that is, cement standard sand) and so on. River sand can also be used in sand cleaning, rust removal, strengthening, forming, stress relief and surface cleaning and painting of various profiles in the fields of casting, metallurgy, heat treatment, steel structure, frame structure, repair, bridge, mine and so on.
Most of the natural quartz sand comes from quartz deposits and has the characteristics of high SiO2 content (more than 90%), low mud content, uniform and reasonable particle size composition, round particles, smooth surface and good fluidity.
Quartz sand has high Morse hardness, which is different from river sand and forms strong adhesion with cement paste to enhance the flexural and compressive strength of the paste. Quartz sand is widely used in glass, casting, ceramics and refractories, smelting ferrosilicon, metallurgy, construction, chemical, plastics, rubber, abrasives and filter materials and other industries. it is also an ideal material for modern track and field, football field, golf course and other man-made venues.
Sea sand is the sand and gravel in the sea. The larger particle size is sand, usually in centimeters; the smaller particle size is sand, usually in millimeters; both are pure natural, scoured, rolled, collided and polished by sea water. In addition to silicon dioxide, sea sand also contains a small amount of chloride ion, feldspar, calcium, magnesium, mica and so on.
Sea sand is mainly the main raw material of machinery and casting sand, and it can also be used for grinding materials, sand cleaning, rust removal, oxide scale removal, ceramics and refractories, etc. Although sea sand has the advantages of river sand, it is often mixed with shell fragments and contains more salt. Most of the sea sand contains excessive chloride ion, which will corrode the steel bars in reinforced concrete, eventually lead to the destruction of the building structure, and shorten the safe service life of the building to a certain extent.
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On August 1, the European Union officially began to implement the "voluntary reduction" agreement on natural gas adopted last month. Under the agreement, EU member states will reduce gas demand by 15 per cent from the average consumption over the past five years through measures of their choice between August 1 this year and March 31 next year.
Several major German cities, such as Berlin, Hanover and Munich, have begun to take measures to reduce energy consumption. Berlin, for example, decided to turn off the lights of more than 200 tourist attractions at night. Berlin's municipal buildings will have indoor temperatures of no more than 20 degrees Celsius between October 1 and March 31 next year, and only nurseries, schools, nursing homes and hospitals can be exempted from energy-saving measures.
Spain's energy conservation plan forces companies, businesses and vehicles to limit air-conditioning temperatures in summer and heating temperatures in winter. The above-mentioned places must limit the air-conditioning temperature to more than 27 degrees Celsius in summer and the heating temperature below 19 degrees Celsius in winter. The plan requires that shop window lighting be turned off at 22:00. The plan also requires the administration to regularly review the heating systems of enterprises in order to avoid energy waste.
Luoyang Tongrun Nano Technology is a trusted chemical manufacturer and supplier providing high-quality chemicals and Nanomaterials. If you are looking for the nano silica powder, please feel free to contact us and send an inquiry.