Application of rock wool debris in vitrified bead thermal insulation mortar
2021-02-23
Application of rock wool debris in vitrified bead thermal insulation mortar
Rock wool is widely used in shipbuilding, metallurgy, electric power, construction and other industries, and has good thermal and sound insulation effects.
In the field of construction, rock wool is a high-quality and efficient thermal insulation material. It has good thermal insulation, sound insulation and sound absorption properties. Compared with traditional thermal insulation materials, rock wool and its products have lighter bulk density, low thermal conductivity, It has outstanding advantages such as non-combustion, fire-proof, non-toxic, wide application range, stable chemical performance, and long service life. It is an ideal insulation material recognized at home and abroad, and is widely used in various industries such as construction. In the construction industry, as a Class A fireproof and thermal insulation material, rock wool products are often used in the external thermal insulation of buildings, the sound insulation filling material of the internal partition walls of the building, and the sound absorption material of the ceiling in the building.
In foreign countries, especially in the European construction market, rock wool products are widely used. The per capita consumption in Northern Europe is more than 20kg, the per capita consumption in the United States is 5-10kg, and the per capita consumption in the former Soviet Union is also more than 5kg. Due to fire protection problems, rock wool and slag wool account for 70% in the United States, and almost all of the external insulation of buildings over 22m in Germany uses rock wool insulation materials.
According to the rock wool research report of Limu Information Consulting, the Ministry of Public Security and the Ministry of Housing and Urban-Rural Development jointly issued the "Notice on Printing and Distributing the Interim Provisions on Fire Protection for Civil Building Exterior Insulation Systems and Exterior Wall Decoration" on September 25, 2009 (Circular 46 for short) ). This is the first regulatory document issued in response to fires in building insulation projects. The document clearly stipulates the application requirements of Class A insulation materials in building wall insulation projects for the first time. As a non-combustible, heat-preserving, breathable, sound-absorbing, and thermally stable thermal insulation material, rock wool is an ideal combustion grade A-grade thermal insulation material. Prior to the issuance of Circular 46, there were only a few rock wool production lines in my country that could meet the requirements of European standards EN13500 and EN13162, and they were not mainly used in external wall insulation technology. After the issuance of Circular 46, my country's rock wool production and its application technology have developed by leaps and bounds.
Prior to the issuance of Circular 46, there were only a few rock wool production lines in the country that could meet the requirements of European standards, and the output was less than 100,000 tons. After Circular 46 was issued, the price of rock wool soared, and a piece of "cotton" was hard to find. The huge market demand has greatly promoted the investment in the rock wool industry, and new construction and renovation projects have sprung up. It can be seen that the typical cases reported are: Shanghai New Building Materials Rock Wool Co., Ltd. invested and built the first production line of Shanghai New Building Materials Rock Wool Dafeng Co., Ltd. in Jiangsu Dafeng. The Dafeng rock wool project has four production lines with a total investment of 1 billion yuan. Through the introduction of world-class rock wool production equipment and technology, a modern rock wool manufacturing plant will be built. After the project is completed, a production capacity of 150,000 tons of rock wool products will be formed. The total investment in the first phase of the project is 600 million yuan. Two international advanced rock wool production lines will be constructed with a production capacity of 70,000 tons; BBMG Energy Saving & Insulation Technology Company has an annual output of 3.5 The ignition ceremony of the 10,000-ton rock wool insulation board production line was officially launched in Dachang Jinyu Industrial Park. The line was introduced from Italy with a total investment of 240 million yuan. After it is completed, it will be completed with an annual output of 35,000 tons of Class A fireproof rock wool insulation products; Shandong Oux Rock Wool Manufacturing Co., Ltd. has laid the foundation for its 40,000 tons of rock wool production line.
According to statistics, since 2011, there are about 40 rock wool production lines built and under construction in my country, with a production capacity of about 1 million tons. The output of rock wool is still increasing every year. With such a large output, a large amount of rock wool scraps will be produced in the process of making rock wool products. These wastes are difficult to degrade and pollute the environment. Most people choose to bury them deeply. The annual waste generated is tens of thousands of tons. Deep burying not only wastes manpower and transportation capacity, but also faces great environmental pressure. The use of rock wool waste can reduce the labor cost and freight of landfill, and it can also reduce environmental pollution.