"New infrastructure" to stimulate the explosion of electrical industry, fireproof cable grade magnesium oxide to meet the opportunity
At the beginning of 2020, the central and local governments have announced a series of infrastructure investment plans in order to promote economic recovery against the backdrop of the global pandemic, the international financial tsunami, china-us trade frictions and transformation and upgrading. By early April, the "new infrastructure" set by the central government mainly covers seven areas, including 5G infrastructure, ultra-high voltage, intercity high-speed rail and urban rail transit.
With the advent of "new infrastructure", the electrical industry has ushered in a major boon. As a core form of energy, "wire and cable" is not only the focus of the layout of uHV field, but also one of the important fields of infrastructure construction such as subway, high-speed rail, communication hub project, super high-rise, chemical plant, etc. While running through "new infrastructure", it also drives the development of the upstream and downstream of the electrical equipment industry chain. In assisting the construction of emerging high energy consumption infrastructure, it also poses new challenges and requirements for the upstream industry of fireproof cable grade magnesium oxide.
Tuyere has arrived, fireproof cable market outbreak
It is not only the demand of "new infrastructure" for electrical equipment, but also the market demand for fireproof cable-grade magnesium oxide under the influence of scientific and technological progress, modernization requirements and electrical fires. Data from China Fire Protection Showed that electrical fires still ranked first in the distribution of fire causes across the country in 2019. Even the classic building "Notre Dame De Paris", which stood in Paris for more than 800 years, was destroyed by an electrical fire caused by "wires and cables".
In fact, the demand for magnesium oxide insulated fireproof cable almost involves the whole industry of "new and old infrastructure", including subway, high-speed rail, ships, airports, communication hub projects, all kinds of high-rise industrial buildings and other fields, as well as hotels, shopping malls, hospitals, theaters, ancient buildings and other crowded public places. It also involves the application of high temperature, nuclear power and other special scenarios, such as power plants, high-speed iron plants, nuclear power plants, chemical plants, offshore oil platforms and other special scenarios. In the fire protection system, emergency lighting system, alarm system, automatic fire sprinkler system, personnel evacuation evacuation system, military facilities and installations and explosion-proof places and other fields of electrical buildings there are huge demands. In the electric power and building design manuals or specifications formulated by the relevant state departments, it has been gradually clarified that copper core copper sheath magnesium oxide insulated fireproof cable must be used in some occasions. The demand for fireproof cable also directly drives the development and growth of fireproof cable grade magnesium oxide in upstream industry.
Europe and America control technology and market
Fireproof cable grade magnesium oxide is copper core copper sheath magnesium oxide insulation fireproof and explosion-proof cable with the most important insulation high temperature filling material, due to the particularity of its material and structure, determines the product has organic cable (plastic cable) can not match the electrical performance, mechanical performance, environmental resistance and environmental performance.
Due to the high content of magnetic material in fireproof cable grade magnesium oxide raw materials, mechanical iron and ultrafine powder with more doping in the particle size are produced in the process of particle size crushing and shaping. Therefore, under the influence of uneven wrapping of moisture-proof agent and insufficient high temperature resistance, the anti-pulse high voltage strength and high voltage and high temperature electrical performance of magnesium oxide are seriously reduced. Technical defects also restrict the upstream material of fireproof cable grade magnesium oxide in the application of copper core copper sheath magnesium oxide insulated fireproof cable and other products, making the rigid mineral insulated fireproof cable of high temperature resistance, moisture-proof, fire, explosion-proof, and non-combustion and service life is difficult to meet the higher requirements of users.
Therefore, for a long time in the past, the sophisticated technology of insulating layer materials for mineral cables was still controlled by European and American countries, and the market was once monopolized by European and American countries. For the industry, the market value of fireproof cable grade magnesium oxide is very high, and it is extremely urgent to break through the technical difficulty and seize the market demand.
As a fire retardant cable grade magnesium oxide, magnesium oxide functional materials specializing in the production of the enterprise, we always adhere to the new and high technology industrialization development path, and, the Chinese Academy of Sciences dalian materialized, Northeastern University, liaoning university of science and technology institutes of colleges and universities to carry out the "production" such as cooperation, magnesium industry senior experts as technical adviser, actively promote transformation and upgrading of traditional magnesia material industry
In the face of market demand and industry changes, we and Dalian University of Technology made full use of the opportunity of industry, university and research. On the eve of the outbreak of "new infrastructure" demand, we developed a special magnesium oxide powder filler material mainly used for the production of fire resistant high temperature cable (BTTZ). The material has excellent electrical performance and thermal conductivity, the highest temperature can withstand 1400℃ long time flame damage test, since the product has been put into the market to meet the design and limit environmental requirements of various fireproof cables. He emphasized that the fireproof cable grade magnesium oxide has excellent comprehensive performance, high filling density, strong mobility, strong insulation and moisture resistance, which will greatly improve the cable filling chamber degree and durability. In terms of the use effect, the experiment shows that it can withstand up to 7500V/10 minutes high voltage breakdown strength, and has applied for 5 national invention patents.
The magnesium oxide powder we produce has a certain degree of granularity, the shape is generally round rather than the current production of sheet in Our country. Only round can make the filling powder density, good fluidity, and has a certain percentage of particles. When adding powder, it is not easy to damage the line conductor with high conductivity, ensuring that there is no difficulty in filling powder. In addition to improving the production process and innovating the ratio of raw materials, we also carry out technological innovation on the existing crushing, grinding and forming equipment to improve production efficiency and reduce costs.
