- Time:Nov 14, 2022
1. High purification
The technological progress of refractories generally begins with the high purification of raw materials. The common sense of refractory process shows that improving purity and reducing the content of impurities is one of the most effective means to improve the quality of refractories. Taking magnesia as an example, the low melt produced by silica in magnesia is easy to erode the magnesia grain boundaries, hinder the bonding between the magnesia grains, thereby impairing the high temperature performance and erosion resistance of the material. Scientific and technological personnel extract magnesium oxide from seawater, or find high-grade minerals, pick ore, winnowing, water separation and electrofusion enrichment and other means to improve the purity of raw materials, and further improve the fire resistance of raw materials by adjusting the silicon-calcium ratio. The improvement of the purity of magnesia and the emergence of high-grade magnesia are the improvement of the performance of magnesia refractory products and the technical level of new magnesia refractories. High purity reduces harmful components that affect the properties of refractory materials; High pressure creates a dense structure; The high temperature produces a strong and stable bond. After the adoption of these technologies, the performance of refractories has been significantly improved, the service life has been significantly extended, and the process of refractories has entered a modern stage.
2. Compounding
While the refractory raw materials are highly purified, the compounding is also constantly making breakthroughs. Compounding is to add other refractories to a single refractory raw material, and develop new refractory materials by learning from each other. Take the refractory materials for cement kiln high-temperature belt as an example: before the 50s of the 20th century, a single refractory raw material was used, and after the 50s, a composite process was adopted. Over the decades, scientists have conducted in-depth research on valuable refractory systems, and many complex refractories have been developed. For example: cement industry with direct combination of magnesia chromium brick, magnesium aluminum spinel brick, iron aluminum spinel brick, magnesium dolomite zirconium brick, anti-spalling high aluminum brick, silicon momo brick, etc.
3. Automation
Computer control technology plays an important role in completing accurate and rapid control, achieving stable production, high yield, high quality, low consumption, safe operation, improving working conditions and improving economic efficiency. The gap between refractories and foreign products in China is mainly reflected in the poor batch stability of domestic materials. To solve this problem, it is necessary to adopt a large number of advanced equipment and automation technologies. Refractory companies in developed countries have long widely adopted automatic control technology. ZHENJIN REFRACTORIES also recognized this, introduced the European refractory brick intelligent picking production line, and adopted a 9-point detection method for refractory bricks to ensure that the refractory brick output rate reached 100%. Introduced Japanese X-ray fluorescence spectrometer to test raw materials and ensure the high purity quality of raw materials.
4. Green manufacturing
Green manufacturing is the main feature of the refractory production process in the new century. In the newly revised industrial structure adjustment catalogue in 2019, the long-life refractory process has been listed as an encouraged item, and chromium-containing refractories will be gradually restricted or even eliminated. ZHENJIN REFRACTORIES actively responds to the call of the state and uses desulfurization and out-of-stock equipment to achieve green and intelligent production
