[Chicago.com] Not long ago, the five major aluminum companies such as Alcoa Co., Ltd. proposed to compress 10% of production capacity. At the same time, a number of alumina companies in China have started production or launched new capacity. The expansion momentum is still unstoppable, and the potential for excess industry is further aggravated.
First, the domestic alumina market conditions - Sheng very bad In early June, China Aluminum, Shandong Nanshan Group, Shandong Fuping Xinfa Group, Binzhou New Aluminum Power Co., Ltd. and Chongqing Bosai Mining (Group) Co., Ltd. Five alumina backbone enterprises jointly issued an initiative to the national alumina production enterprises and decided to reduce production by 10% from the beginning of the month in order to stabilize the market and ensure the healthy and orderly development of the alumina industry. The immediate cause of the joint press production was the change in the export policy of bauxite in Indonesia, which increased the cost of imported bauxite in the country. However, under the background of economic downturn and weak domestic demand, another reason that cannot be overlooked is that the crazy expansion of the domestic alumina industry in recent years has led to overcapacity.
As of the end of 2011, the domestic alumina production capacity has reached 51.42 million tons, while the actual production is 39 million tons, a year-on-year increase of 25%, setting a record high. With overcapacity, domestic alumina prices have also been falling since the beginning of May this year. Since July, alumina prices in Shandong and some parts of southern China have fallen below 2,600 yuan/ton, of which Guangxi has a lower offer of 2,550 yuan/ton, and Shandong has a lower offer of 2,580 yuan/ton. Many SMEs have no interest in Map of the situation. However, what is more worrying is that domestic alumina expansion is still strong.
At the same time as China Aluminum and other 5 companies initiated industry production cuts, Shanxi Yangmei Group's alumina phase II project was put into trial production, Yunnan Wenshan Aluminum Co., Ltd.'s 800,000 tons alumina project was formally put into operation, and Guangdong Aluminum Group was located in Guizhou Qing The first stage project of an alumina refinery with an annual production capacity of 800,000 tons in the town has officially started commercial production. According to statistics, domestic aluminum oxide will still have 7.6 million tons of new production capacity this year, and these new production capacity will be concentrated in the second half of this year.
The rapid expansion of the alumina industry in recent years is due to the stimulation of industrial profits in 2003-2005. The electrolytic aluminum project was launched frantically. Aluminum oxide as an electrolytic aluminum raw material became the subject of chase for many companies. The price rose rapidly from 2,000 yuan/ton to 6,000 yuan/ton, and the alumina profit per ton was as high as 2,500 yuan. . Driven by the huge profits, alumina investment is almost crazy.
Another reason for the alumina investment frenzy stems from the release of companies expecting a huge growth potential in the domestic market. At present, China is still in the process of urbanization, and aluminum ingot consumption per capita is still at a very low level.
Despite this, alumina investment is still full of blindness. In this regard, while the state is strengthening the macro-control of electrolytic aluminum, it also puts forward a series of explicit policy provisions for the development of alumina. An analyst of CITIC Securities, who asked not to be named, told reporters that under the blind pursuit of GDP by local governments and keen to start a heavy chemical project, the national industrial policy was step by step overhead, pushing the alumina industry to a higher level. A deformed development path.
Second, explain the importance of improving the quality of products to the enterprise Nowadays, the competition in the alumina industry is so fierce that it is imperative to improve product quality. Only by improving product quality can we survive and develop in such a large environment. The company interviewed this time is a manufacturer of modified alumina. It mainly imports finished aluminum products from foreign countries and modifies the imported alumina according to customer specifications. In general, the domestically produced finished alumina is not very pure, with high impurity content and high sodium oxide content. Nowadays, many companies' raw materials are imported from abroad. However, due to the influence of the international alumina industry, some of the foreign alumina exports have also been controlled. For example, because the supply of raw materials is not enough, the production line is reduced. So that some customers' orders are not answered. From this we can see that improving product quality has important implications for the company's production and impact.
Third, the significance and role of particle testing on product quality Alumina products are widely used, many upstream and downstream industries.
The main components of ruby ​​and sapphire are aluminum oxide, which shows different colors due to other impurities. In the major component of the aluminum ore, yttrium iron oxide, the alumina content is high. Alumina is the reason why metallic aluminum is not easily corroded in air. Pure metal aluminum reacts easily with oxygen in the air, creating a dense layer of aluminum oxide film that covers the aluminum surface exposed to air. This aluminum oxide film prevents aluminum from being continuously oxidized. Both the thickness and the properties of this oxide film can be enhanced by a process called anodization (anode corrosion). Aluminum is a good conductor of electricity and heat. Due to its high hardness, the alumina crystal form is suitable for use as an abrasive material and cutting tool. Alumina powder is often used as a vehicle for chromatographic analysis.
Corundum powder hardness can be used as abrasive, polishing powder, high-temperature sintering alumina, artificial corundum or synthetic gemstones, can be made of mechanical bearings or diamonds in watches. Alumina is also used as a high-temperature refractory material to make refractory bricks, enamels, porcelain, synthetic gems, etc. Aluminum oxide is also a raw material for aluminum smelting. Aluminum hydroxide can be calcined to produce γ-Al2O3. γ-Al2O3 has strong adsorption and catalytic activity and can be used as adsorbent and catalyst. The main component of corundum is α-Al2O3. Barrel or cone-shaped three-way crystal. Glossy or adamant. The density is 3.9 to 4.1 g/cm3, hardness is 9, and the melting point is 2000±15°C. Insoluble in water, not soluble in acid and alkali. High temperature resistance. Colorless and transparent is called white jade, red ruby ​​which contains a trace of trivalent chromium, sapphire which contains divalent iron, trivalent iron or tetravalent titanium, and dark gray or dark black which contains a small amount of triiron tetroxide. Called corundum powder. Can be used as bearings for precision instruments, watches, diamonds, wheels, polishes, refractories, and electrical insulators. In addition to natural minerals, hydroxide hydroxide can be used to melt aluminum hydroxide.
Thus, the use of modified alumina involves various aspects. Therefore, controlling the product particle size has important significance for improving the properties of various aspects.
IV. Control of Particle Size of Upstream and Downstream Alumina Enterprises Because of the wide range of uses of alumina, the nature and particle size of alumina needed for different uses are also different. In general, the alumina produced must first undergo particle size testing before modification. For example, in the production of refractory materials, it requires high thermal conductivity, good thermal shock resistance, high temperature strength, and resistance to acid and alkali and salt. . As a raw material for refractory materials, it is necessary to control the alumina particle size before production.
Fifth, the specific application of the laser particle size analyzer method Shanghai Quansheng Chemical Co., Ltd. is a company that produces and sells alumina. Mainly imported raw materials, through its own processing and production of modified alumina, and then sold to high-end customers and exports abroad. The laser particle size analyzer used by the company is WINNER2000 (Jinan Micron Particle Instruments Co., Ltd.). The instrument is mainly used to measure the particle size of the incoming alumina and the size of the modified alumina. They have a wide range of applications in fire-resistant, ceramic, cement, abrasive, recycled plastic, and biodegradable materials.
Sixth, the advantages of laser particle size analyzer and to summarize the laser particle size analyzer instrument is based on the principle of light scattering particle size measurement, is a more general particle size analyzer. It is characterized by its wide dynamic range, fast measurement speed and convenient operation. It is especially suitable for measuring powder droplets and liquid droplets with a wide range of particle size distribution.
The laser particle sizer integrates laser technology, modern optoelectronic technology, electronic technology, precision machinery and computer technology. It has the advantages of fast measurement speed, large dynamic range, easy operation and good repeatability. It has now become a popular particle size testing instrument in the world. .
As a new type of particle size testing instrument, laser particle size analyzer has been widely used in other powder processing and application fields. It is characterized by fast test speed, good repeatability, good accuracy, and easy operation. It is of great significance to improve product quality and reduce energy consumption.
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