At the beginning of 2020, in the context of the global pandemic, the international financial tsunami, Sino-US trade friction, transformation and upgrading and other complex and volatile backgrounds, in order to promote economic recovery, the central and local governments have intensively announced a series of infrastructure investment plans. By the beginning of April, the "new infrastructure" set by the central government mainly involved seven major fields including 5G infrastructure, UHV, intercity high-speed railway and urban rail transit.

With the emergence of "new infrastructure", the electrical industry has ushered in major benefits. As the core form of energy, "wire and cable" is not only the focus of the UHV field, but also one of the important areas of infrastructure construction such as subways, high-speed railways, communication hub projects, super high-rises, and chemical plants. While running through the "new infrastructure", it also drives the development of the upstream and downstream of the electrical equipment industry chain. At the moment of assisting the construction of emerging high-energy-consuming infrastructure, new challenges and requirements are also put forward for the upstream industry fire-resistant cable-grade magnesium oxide.

The tuyere has arrived, and the fireproof cable market has exploded

Not only the demand for "new infrastructure" for electrical equipment, but also under the influence of various factors such as scientific and technological progress, modernization requirements and electrical fires, the market demand for fire-resistant cable-grade magnesium oxide is rapidly heating up. Data from China Fire Protection shows that in the distribution of fire causes nationwide in 2019, electrical fires still rank first among all types of fires. Even the classic building "Notre Dame de Paris" standing in Paris for more than 800 years was caused by "wires and cables" to cause an electrical fire, and it was completely destroyed in the end.

In fact, the demand for magnesium oxide insulated fireproof cables involves almost all industries of "new and old infrastructure", including subways, high-speed railways, ships, airports, communication hub projects, various high-rise industrial buildings, as well as hotels, shopping malls, hospitals, Theaters, ancient buildings and other crowded public places. It also involves the application of special scenarios such as high temperature and nuclear power, such as power plants, high-speed rail plants, nuclear power plants, chemical plants, offshore oil platforms and other special scenarios. There is a huge demand in electrical buildings in the fields of fire protection systems, emergency lighting systems, alarm systems, automatic fire sprinkler systems, personnel evacuation evacuation systems, military installations and installations, and explosion-proof sites. In the electric power and architectural design manuals or specifications formulated by relevant departments, it has been gradually specified that copper core copper sheathed magnesium oxide insulated fireproof cables must be used in some occasions. The demand for fireproof cables also directly drives the development and growth of fireproof cable grade magnesium oxide in the upstream industry.

Fly in the ointment, Europe and the United States control technology and market

Fireproof cable grade magnesium oxide is the most important insulating and high temperature resistant filling material for copper core copper sheathed magnesium oxide insulated fireproof and explosion-proof cables. Due to the particularity of its materials and structure, it is determined that this product has incomparable properties of organic cables (plastic cables). The electrical properties, mechanical properties, environmental resistance and environmental performance.

Due to the high content of magnetic substances in the raw material of fire-resistant cable-grade magnesium oxide, mechanical iron and more ultrafine powder are produced in the particle size crushing and shaping process. Under high pressure, the anti-pulse high-voltage strength and high-voltage high-temperature electrical properties of magnesium oxide are seriously reduced. The technical defects also restrict the application of the upstream material of fireproof cable grade magnesium oxide in the copper core copper sheathed magnesium oxide insulated fireproof cable and other products, making the rigid mineral insulated fireproof cable resistant to high temperature, moisture, fire, explosion, and non-combustion. It is difficult to meet the higher requirements put forward by users in terms of service life and other issues.

Therefore, for a long time in the past, the high-precision technology of insulating layer materials for mineral cables was still controlled by Europe and the United States, and the market was once monopolized by Europe and the United States. For the industry, the market value of fire-resistant cable-grade magnesium oxide is extremely high, and it is imminent to break through technical difficulties and seize market demand.

Breakthrough innovation, Liaoning Jiashun catches up with European and American standards

As a professional manufacturer of magnesium oxide functional materials such as fire-resistant cable grade magnesium oxide, Liaoning Jiashun Chemical Co., Ltd. has always adhered to the path of high-tech industrialization, and has cooperated with Dalian Institute of Physics and Chemistry, Chinese Academy of Sciences, Northeastern University, Liaoning University of Science and Technology and other colleges and universities." Industry-university-research cooperation, employ magnesium industry experts as technical consultants, and actively promote the transformation and upgrading of the traditional magnesium material industry.

In the face of market demand and changes in the industry, Liaoning Jiashun and Dalian University of Technology took full advantage of the opportunity of industry-university-research, and on the eve of the outbreak of "new infrastructure" demand, they developed a special oxidizer mainly used for the production of fire-resistant and high-temperature resistant cables (BTTZ). Magnesium powder filling material. According to Wang Jiqi, general manager of Jiashun, Liaoning, the material has excellent electrical properties and thermal conductivity, and can withstand 1400 ℃ high temperature and long-term flame damage experiments. He emphasized that the comprehensive performance of this fire-resistant cable grade magnesium oxide, the product has high packing density, strong fluidity, and strong insulation and moisture resistance, which will greatly improve the packing density and durability of the cable. In terms of use effect, experiments have shown that it can withstand 7500V/10 minutes high-voltage electrical breakdown strength, and has applied for 5 invention patents.

Master the core technology and continuously optimize the industrial structure

In fact, Liaoning Jiashun Chemical Industry and Dalian University of Technology have already established a "Joint R&D and Innovation Platform for Special Magnesium Materials" and a "Postgraduate Innovation Practice Base", and established a professional technology R&D center equipped with advanced and complete experimental research instruments and Testing equipment can timely and accurately test incoming raw materials, process parameters, and product performance to ensure the controllability of the process and the stability of product quality. Magnesium oxide JS-KF, also known as magnesium oxide for fireproof cables (mineral cables).

For the company, although it belongs to the upstream industry of raw materials, the core technology is the foundation of its foothold. It is understood that whether the coding geometry and natural distribution group of magnesium oxide powder particles is reasonable directly affects the quality and filling reliability of fire-resistant cable-grade magnesium oxide powder. If the particle size shape and distribution are not suitable, its mechanical strength and electrical insulation properties will be affected. In order to solve the pain points of the industry, Liaoning Jiashun has done a lot of experiments.

It is understood that in the process of processing, the powder formed by the previous crushing technology has a high degree of flake shape and is not well filled. Therefore, Liaoning Jiashun Chemical Co., Ltd. adopts new technology for medium-free crushing. When the material is impacted, a grinding force is generated to form a powder with a high sphericity rate, thereby ensuring reliable quality.

In addition, the company's technical research and development personnel researched the relationship between the particle size and strength of the raw materials, powder composition and molding eye, and finally determined the appropriate production process and raw material ratio from the perspective of cost optimization. An engineer from Liaoning Jiashun Chemical Co., Ltd. said that the magnesium oxide powder we produce has a certain particle size, and the shape is generally round instead of the flake shape currently produced in my country. Only the round shape can make the filling density high, the fluidity is good, and it has a certain percentage of particles. High conductivity wire conductors are not easily damaged when powder is added, ensuring powder filling without difficulty. While improving the production process and innovating the ratio of raw materials, Liaoning Jiashun also carried out technological innovations on the existing crushing, grinding and forming equipment to improve production efficiency and reduce costs. At present, Liaoning Jiashun also adopts high-temperature plasma technology and inorganic modification technology to realize the industrial production of fire-resistant cable-grade magnesium oxide, and realizes large-scale production while improving technology to meet the industry's demand for fire-resistant cable-grade magnesium oxide.

There is no doubt that "new infrastructure" will light up the future of China's economy and boost the confidence of all parties. It is the most effective way to deal with the epidemic, economic downturn and promote reform and innovation. It is becoming the consensus of the government and the opposition. The central government is intensively named, local governments have made efforts, and the market has generally responded. A new wave of growth will also be ushered in for fire-resistant cable-grade magnesium oxide.