At the beginning of 2020, against the complex changeable background of the global pandemic, the international financial tsunami, Sino-US trade frictions, transformation upgrading, in order to promote economic recovery, the central 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 5G infrastructure, UHV, intercity high-speed railway urban rail transit, other seven major areas.

With the emergence of "new infrastructure", the electrical industry ushered in major benefits. As the core energy form, "wire cable" is only the focus of the UHV field, but also one of the important areas of infrastructure construction such as subways, high-speed rails, communication hub projects, super high-rise buildings, chemical plants. While running through the "new infrastructure", it has also stimulated the development of the upstream downstream of the electrical equipment industry chain. At the moment of assisting the construction of emerging high-energy-consuming infrastructure, new challenges requirements are also put forward for the upstream industry of fireproof cable-grade magnesium oxide.

The air outlet has arrived, the fireproof cable market has broken out

It is only the demand for electrical equipment "new infrastructure", but also under the influence of many factors such as scientific technological progress, modernization requirements, electrical fires, the market demand for fire-resistant cable-grade magnesium oxide is rapidly heating up. According to data China Fire Protection, electrical fires still rank first among all types of fires in the distribution of national fire causes in 2019. Even the classic building "Notre Dame de Paris", which has been standing in Paris for more than 800 years, was caused by electrical fires caused by "wires cables", it was eventually destroyed.

In fact, the demand for magnesium oxide insulated fireproof cables almost involves the entire industry of "new old infrastructure", including subways, high-speed rails, ships, airports, communication hub projects, various high-rise industrial buildings, as well as hotels, shopping malls, hospitals, etc. Theaters, ancient buildings other public places with dense crowds. It also involves applications in special scenarios such as high temperature nuclear power, such as power plants, high-speed railway plants, nuclear power plants, chemical plants, offshore oil platforms 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 systems, military installations devices, explosion-proof sites. In the electric power building design manuals specifications formulated by the relevant state departments, it has been gradually specified that copper core copper sheathed magnesium oxide insulated fire-resistant cables must be used in some occasions. The demand for fire-resistant cables has also directly driven the development growth of the upstream industry's fire-resistant cable-grade magnesium oxide.

U.S. Europe control technology market

Fire-resistant cable-grade magnesium oxide is the main insulation high-temperature filling material for copper core copper sheathed magnesium oxide insulated fire-proof explosion-proof cables. Due to the particularity of its materials structure, this product is unmatched by organic cables (plastic cables) The electrical performance, mechanical performance, environmental resistance environmental performance of the product.

Due to the high content of magnetic material in the raw material of fire-resistant cable-grade magnesium oxide, mechanical iron is produced during the particle size crushing shaping process, the particles are doped with more ultra-fine powder, so it is affected by uneven packaging of moisture-proof agent insufficient high temperature Therefore, the resistance to pulse high voltage strength high voltage high temperature electrical properties of magnesium oxide are seriously reduced. Technical defects also restrict the application of the upstream material of fire-resistant cable grade magnesium oxide in copper core copper sheathed magnesium oxide insulated fire-resistant cables other products, making rigid mineral insulated fire-resistant cables resistant to high temperature, moisture, fire, explosion, non-combustion the service life other issues are difficult to meet the higher requirements of users.

Therefore, for a long time in the past, the sophisticated technology of insulation materials for mineral cables was still controlled by European American countries, the market was once monopolized by European American countries. As far as the industry is concerned, the market value of fire-resistant cable-grade magnesium oxide is extremely high, it is imminent to break through the technical difficulties seize market demand.

Breakthrough innovation, Liaoning Jiashun catches up with European American standards

As a professional manufacturer of magnesium oxide functional materials such as fire-resistant cable-grade magnesium oxide, Liaoning Jiashun Chemical Industry has always adhered to the path of high-tech industrialization development. "Industry-university-research-application" cooperation, hiring senior experts in the magnesium industry as technical consultants, actively promoting the transformation upgrading of the traditional magnesium material industry.

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

Master the core technology continue to optimize the industrial structure

In fact, Liaoning Jiashun Chemical Industry Dalian University of Technology have established a "special magnesium material joint research development innovation platform" a "postgraduate innovation practice base", set up a professional technology research development center, equipped with advanced complete experimental research equipment Testing equipment, timely accurate testing of incoming raw materials, process parameters, product performance to ensure the controllability of the process the stability of product quality. It is precisely because of multi-party coordination continuous research development that today’s fire-resistant cable class Magnesium oxide JS-KF, also known as magnesium oxide for fireproof cables (mining cables).

For the company, although it belongs to the upstream industry of raw materials, the core technology is the foundation. It is understood that whether the coding geometry natural distribution group of magnesium oxide powder particles are reasonable, directly affect the quality filling reliability of fire-resistant cable-grade magnesium oxide powder. If the particle size distribution are appropriate, its mechanical strength electrical insulation properties will be affected. In order to solve the industry's pain points, Liaoning Jiashun has done a lot of experiments.

It is understood that during the processing, the powder formed by the previous crushing technology has a high degree of needle flakes poor filling. Therefore, Liaoning Jiashun Chemical Industry adopts new technology for non-medium crushing, which produces grinding force when the material is impacted, resulting in a high rate of spherical powder formation, thereby ensuring reliable quality.

In addition, when the company’s technical R&D personnel studied the relationship between the particle size strength of the raw materials the powder composition molding, they finally determined the appropriate production process raw material ratio the perspective of cost optimization. The engineer of Liaoning Jiashun Chemical Industry stated that the magnesium oxide powder we produce has a certain degree of granularity, the shape is generally round rather than flakes currently produced in my country. Only a round shape can make the powder filling density high, good fluidity, have a certain percentage of particles. It is easy to damage the high-conductivity wire conductor when adding powder, so that the powder can be filled without difficulty. While improving the production process innovating the ratio of raw materials, Liaoning Jiashun also carried out technological innovations on the existing crushing, grinding, molding equipment to improve production efficiency reduce costs. At present, Liaoning Jiashun also uses high-temperature plasma technology inorganic modification technology to realize the industrialized production of fire-resistant cable-grade magnesium oxide, 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 boost the confidence of all parties. It is the most effective way to deal with the epidemic, economic downturn, to promote reform innovation. It is becoming the consensus of the ruling opposition parties. The central government is intensively naming names local governments are making efforts. The market generally responds. It will also usher in a new wave of growth for fireproof cable-grade magnesium oxide.