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Microsilica and silicon micropowder market phenomenon
- 2019-03-30-

It is understood that most of the domestic manufacturers of silicon micro-powder and micro-silica powder confuse the concept of the two, and they are regarded as a product only from the literal meaning. In fact, silicon micropowder and microsilica powder are very different. It is precisely because of the unclear concept of the two that the silicon micropowder and microsilica powder market have caused confusion, resulting in many trade negotiation errors, and the micro silicon powder market price is far. Below the international market, it also has a large negative impact on the international reputation of the silicon micropowder and microsilica market.

One. Current status of silicon micropowder and microsilica market At present, only a few countries in China, the United States, Germany and other countries have silicon micropowder production capacity. The market of silicon micropowder is mainly in China, concentrated in Fengyang, Anhui, Huzhou, Zhejiang, Lianyungang, etc. The export volume is relatively small, and it is exported to South Korea and Japan. The largest domestic producers of silicon micropowders include Anhui Ina High-Tech Co., Ltd. and Donghai Silicon Micro-Powder Factory, with monthly output of more than 1,000 tons. The acceleration of the solar industry has prompted the market demand for silicon micropowder to grow rapidly, and the silicon micropowder has been in short supply. According to relevant information, there are more than 170 manufacturers of silicon micropowders for solar photovoltaic converters in China, of which Shanghai accounts for about 40. Therefore, silicon micropowder has great market demand and potential in China.

The market of micro-silica powder is mostly concentrated in foreign countries. The research on micro-silica powder has been carried out for several decades. For the research and comparison system of micro-silica powder, many countries have established corresponding research institutions and established corresponding production plants. In 1983, the use of microsilica concrete in a project to repair the Kinzua dam was used to save tens of millions of dollars. Micro-silica powder is also an industrial by-product of extensive and medium-sized industrial production. Most industrial silicon production can recover 1 ton of micro-silica powder for every 3 tons of industrial silicon. In the past, most enterprises did not pay enough attention to the recovery of micro-silica powder. The micro-silica powder recovered by some large-scale enterprises was just stacked on one side, and no value and benefit were found. Moreover, these recovered micro-silica silicon Most of the contents are not up to standard, and domestic enterprises are not affected by their quality. They are not willing to buy these products easily. The micro-silicon powder market is still in a disorderly state, and the market has yet to be further developed. Foreign countries have already obtained huge economic benefits in the use of micro-silica powder. For example, in Norway, Aiken buys a large amount of micro-silica powder from low prices every year. Micro-silica powder of most domestic iron-alloy manufacturers, such as Northwest Ferroalloy, is purchased by Aiken every year. After processing in China, it is sold at a high price to domestic buildings. In the fields of cement and fertilizer, the profits are high. The annual sales of micro-silica powder by Aiken is 250,000 tons, which is the absolute leader in the micro-silicon powder industry. However, there are very few enterprises specializing in micro-silica powder in China. The large-scale ferroalloy enterprises in the northwest region are the ones with large output. The environmental protection equipment meets the standard, and the recovered micro-silica powder has a relatively high silicon content, and our company is a micro-silicon. Powder is the current domestic brand and has already had a certain impact in the industry.

The domestic micro-silica powder market has not yet been fully developed, so there is still a lot of market space. However, the resources of micro-silica powder are also limited. With the strengthening of environmental protection by the state, the policy of suppressing the excessive development of high-energy-consuming industries, the micro-silica powder, is imposed while the installation of environmentally-friendly dust-removing equipment by ferrosilicon and industrial silicon manufacturers is forcibly imposed. Resources will become more and more abundant. Therefore, in the face of the cancellation of relevant preferential policies, all businesses should take the initiative to find the benefits of the microsilica market due to the recovery of soot. However, the main reason for the impact of microsilica prices today is the cost of recycling equipment, power consumption, and the choice of packaging due to its physical characteristics, whether it is encrypted and transportation costs. The in-depth research, development and utilization of micro-silica powder is related to the future development of industrial soot recycling and environmental protection industry. In short, while strengthening the understanding of the reuse of micro-silica powder, all businesses should also look for business opportunities more actively, and enhance the vitality of the entire micro-silica powder market to increase its temperature.

two. Differences in the production process of silicon micropowder and microsilica powder Silicon micropowder is crushed, ball milled (or vibrated, airflow milled) by natural quartz (SiO2) or fused silica (amorphous SiO2 melted and cooled by natural quartz at high temperature). Micro-powder processed by multiple processes such as flotation, pickling and purification, and high-purity water treatment.

Micro-silica powder is also called silica fume or agglomerated silica fume, and some people call it silicon powder. When ferroalloy is used to smelt ferrosilicon and industrial silicon (metal silicon), a large amount of highly volatile SiO2 and Si gas is produced in the ore furnace, and the gas is quickly oxidized and condensed and precipitated after being discharged. It is a by-product of large-scale industrial smelting. The whole process needs to be recycled with dust-removing environmental protection equipment. Because of its lighter quality, it needs to be encrypted with encryption equipment.

In the actual transaction process, many manufacturers regard silicon micropowder as micro silicon powder, but because of the essential difference between the two, there are often deviations in the transaction process, so that the product indicators provided by the manufacturers and the indicators parameters of the demand side exist. Huge difference.

three. The difference between the appearance of silicon micropowder and microsilica

From the appearance, silicon micropowder and microsilica powder are basically easy to distinguish. Silicon micropowder is pure, white and balanced. It is a non-toxic, odorless and non-polluting inorganic non-metallic material. According to silica raw materials and reducing agents. Or the difference in furnace conditions, the vast majority of microsilica powder is gray or dark gray. In the formation process, due to the surface tension in the process of phase transformation, amorphous spherical granules of amorphous phase are formed, and the surface is relatively smooth, and some are agglomerates in which a plurality of spherical particles are bonded together. White micro-silica powder is rare, and there has been no suitable market positioning in the past. Shanghai Tianyi Special Materials Co., Ltd. has launched white micro-silica powder, which has been successfully applied to compound fertilizer, pesticide (as adsorbent or silicon fertilizer), paint and paint ( As a thickener, anti-settling agent), rubber (as a reinforcing agent), plastic (as a filler), special ceramics, can replace white carbon black, but the amount is relatively limited.

four. The difference in performance and use of silicon micropowder and microsilica powder is related to the performance or function of silicon micropowder and microsilica powder. The silicon micropowder is generally characterized by good temperature resistance, acid and alkali corrosion resistance, poor thermal conductivity and high insulation. Excellent performance such as low expansion, stable chemical properties and high hardness. According to its use, silicon micropowder is divided into the following categories: ordinary silicon micropowder, electrical grade silicon micropowder, electronic grade silicon micropowder series, fused silica silicon micropowder, ultrafine quartz silicon micropowder, and nano silicon micropowder. The specific uses of various silicon micropowders are as follows:

1. Silicone micropowder, mainly used in epoxy resin castings, potting materials, electrode coatings, metal casting, ceramics, silicone rubber, coatings and other chemical industries.

2. Electrical grade silicon micropowder, mainly used for insulation casting of ordinary electrical components, insulation casting of high voltage electrical appliances, APG process injection materials, epoxy potting materials, high-grade ceramic glazes, etc.

3. Electronic grade silicon micropowder, mainly used for molding materials and packaging materials for integrated circuits and electronic components.

4. The fused silica micropowder and the raw material used for the fused silica micropowder (WG) are fine powders of natural quartz which have been processed by a multi-pass process after being smelted by high temperature and cooled by amorphous SiO2. The product has high purity, low thermal expansion coefficient, low internal stress, high moisture resistance and low radioactivity. It is used in plastic packaging materials for large-scale and very large scale integrated circuits, epoxy castables, potting materials, and other chemical fields.

5. Ultra-fine quartz micro-powder, mainly used for coatings, paints, engineering plastics, adhesives, quino rubber, precision casting advanced ceramics.

6. Nano-SiOx, an important part of nano-SiOx, is mainly used in electronic packaging materials, polymer composites, plastics, coatings, rubber, pigments, ceramics, adhesives, glass steel, pharmaceutical carriers, cosmetics and antibacterial materials. It has become a new material for upgrading and upgrading traditional products.