Identification of microsilica powder and silica micropowder (I)

At present, most domestic manufacturers of silica micropowder and microsilica powder confuse the concept of the two, and understand them only literally, seeing them as one product. In fact, there is a big difference between silica micronized powder and microsilica powder, and it is because of the unclear concept of the two that has caused confusion to the Chinese market of silica micronized powder and microsilica powder, resulting in many trade negotiation mistakes, and the market price of microsilica powder is much lower than the international market, which has also brought a big negative impact to the international reputation of the Chinese market of silica micronized powder and microsilica powder. As foreign countries continue to gain a deeper understanding of silica micropowder and microsilica powder, silica micropowder and microsilica powder have been widely used, and their commercial advantages and extensive market space have gradually come to the fore. In order to distinguish the relationship between the two, clarify the confusion in the market, and reduce the loss of enterprises, we will make a specific analysis of these two products from various aspects such as appearance, performance, production process, application, index, and market status.

At present, only a few countries in the world, such as China, the United States, Germany and other countries with silicon powder production capacity, China’s exports of silicon powder is relatively small, mostly exported to South Korea and Japan, the acceleration of the solar energy industry and the rapid growth of the market demand for silicon powder, silicon powder presents a situation of oversupply. According to relevant information, the domestic production of solar photovoltaic converter with silicon powder manufacturers amounted to more than 170, therefore, silicon powder in the domestic market demand and potential. Microsilica powder market is mostly concentrated in foreign countries, foreign research on microsilica powder has been decades, the microsilica powder research is more systematic, many countries set up the corresponding research institutions, the establishment of the corresponding production plants, and microsilica powder in China is still a crude industrial by-products, most industrial silicon production per 3 tons of industrial silicon can be recovered 1 ton bit microsilica powder. In the past, most enterprises did not pay enough attention to the recovery of microsilica powder, some of the larger enterprises recovered microsilica powder, just stacked on the side, did not find the value and benefits, and most of these recovered microsilica powder silicon content is not up to standard, domestic enterprises by its quality, most dare not easily buy these products, China’s microsilica powder market still presents a disorderly state, the market The market still needs to be further developed. Foreign countries have already gained huge economic benefits from the use of microsilica powder. For example, a multinational enterprise in Norway acquires a large amount of microsilica powder from China at a low price every year, and most of the microsilica powder of domestic ferroalloy manufacturers, such as Northwest Ferroalloy, is acquired by this company every year, which is processed in China and sold at a high price to domestic construction, cement, fertilizer and other fields, where the profits are substantial. There are few domestic enterprises specializing in microsilica powder, and the larger production is still a few large ferroalloy enterprises in the northwest, environmental protection equipment up to standard, the recovery of microsilica powder silicon content is relatively high. At present, the domestic market for microsilica powder has not been fully developed, so that there is still a lot of market space. However, the resources of microsilica powder are also limited. With the strengthening of the state’s environmental protection efforts, the emergence of policies to inhibit the excessive development of high energy-consuming industries while forcing ferro-silicon alloy and industrial silicon manufacturers to install environmental protection dust removal equipment, the resources of microsilica powder will become more and more abundant. Therefore, each businessman should take the initiative to find the market revenue of microsilica powder due to the recycling of soot while facing the cancellation of relevant preferential policies. The main reasons affecting the price of microsilica powder today are still focused on the cost of recycling equipment, power consumption, and its physical characteristics brought about by the choice of packaging, whether encryption and transportation costs. The deep research, development and utilization of microsilica powder concerns the future of China’s industrial soot recycling and environmental protection industry development. In short, in strengthening the understanding of the reuse of microsilica powder at the same time, each business should also be more proactive in finding business opportunities to enhance the vitality of the entire microsilica powder market so that it heats up.

Silica micronized powder is a micronized powder made of natural quartz (SiO2) or fused quartz (amorphous SiO2 after natural quartz is fused and cooled at high temperature) processed through multiple processes such as crushing, ball milling (or vibratory or airflow milling), flotation, acid purification, and high purity water treatment. Microsilica powder is also called silica fume or cohesive silica fume, and some people call it silicon powder. It is produced by ferroalloys in smelting ferrosilicon and industrial silicon (silicon metal), and a large amount of highly volatile SiO2 and Si gas is produced in the mineral-heated electric furnace, and the gas is discharged and rapidly oxidized and condensed and precipitated by air. It is a by-product of large industrial smelting, and the whole process needs to be recovered with dust removal and environmental protection equipment, and because of its relatively light mass, it also needs to be encrypted with encryption equipment. In the actual transaction process, many manufacturers treat silicon micronized powder as microsilica powder, but since the two are fundamentally different, deviations often occur during the transaction process, making the product indicators provided by the manufacturer and the demand side’s index parameters differ greatly.

From the appearance of silica micropowder and microsilica powder is basically also relatively easy to identify, silica micropowder its pure quality, white color, balanced particles, is a non-toxic, tasteless, non-polluting inorganic non-metallic materials; depending on the silica raw materials, reducing agents or furnace conditions, the vast majority of microsilica powder is gray or dark gray. In the formation process, due to the process of phase change by the role of surface tension, the formation of non-crystalline phase amorphous spherical particles, and the surface is relatively smooth, some are multiple spherical particles stuck together in agglomerates. White microsilica powder is relatively rare, there has been no suitable market position in the past, white microsilica powder, successfully applied to compound fertilizers, pesticides (as adsorbent, or production of silica fertilizer), coatings, paints (as thickening agent, anti-sink agent), rubber (as reinforcing agent), plastics (as filler), special ceramics, can replace white carbon black, but the number is relatively limited.

From the silica micropowder and microsilica powder performance or role of silicon industry online is so divided:
Silica micropowder in general has good temperature resistance, acid and alkali corrosion resistance, poor thermal conductivity, high insulation, low expansion, stable chemical properties, hardness and other excellent performance. According to its use silica micropowder is divided into the following categories: ordinary silica micropowder, electrical grade silica micropowder, electronic grade silica micropowder series, fused silica micropowder, ultra-fine quartz silica micropowder and nano-silica micropowder.

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