Application of calcium silicate board insulation material in power plants

Release Time: 2025-10-15

In the production system of power plants, the stable operation of core equipment such as boilers, pipelines, and steam turbines relies on the support of efficient insulation materials. Calcium silicate board, as a high-quality material that combines insulation, fire resistance, and structural stability, has become the preferred solution for insulation engineering in power plants. rosetexwool has been deeply involved in the field of insulation and refractory materials for many years. With a profound understanding of power plant operating conditions, it provides high-performance calcium silicate board products to the industry, helping power plants achieve the dual goals of energy conservation, consumption reduction, and safe production.

1、 Calcium silicate board for power plants: a versatile insulation material with excellent performance

The working conditions of power plants are complex, and strict requirements are placed on the high temperature resistance, compressive strength, waterproofing, and other properties of insulation materials. Calcium silicate board perfectly meets these needs, and its core advantages are mainly reflected in the following four aspects:

（1） High temperature resistance+low thermal conductivity, building a solid energy-saving defense line

Power plant boilers, flues, and other equipment are exposed to high temperatures of 300-600 ℃ for a long time. Calcium silicate boards, with excellent high temperature resistance, can be used at temperatures up to 650 ℃ for a long time and can withstand temperatures exceeding 800 ℃ in the short term. They can still maintain structural stability at high temperatures without softening, deformation, or other problems. At the same time, its thermal conductivity is as low as 0.058W/(m · K) (at 25 ℃), far lower than traditional insulation bricks and rock wool boards, which can effectively block the heat loss of equipment. Through practical case verification, the use of calcium silicate board insulation in the main steam pipeline of power plants can control the surface temperature of the pipeline within 50 ℃, which can help reduce energy consumption costs by 20% -25% annually.

（2） High strength and deformation resistance, suitable for complex working conditions

Part of the insulation area in the power plant needs to withstand certain external impacts, such as pipeline supports in the turbine building and boiler exterior walls. Calcium silicate board is made by composite molding of special fibers and high-strength cementitious materials, with a compressive strength of over 10MPa and a flexural strength of ≥ 3MPa. It is not easily damaged or deformed during handling, installation, and long-term use, and can maintain a complete insulation layer structure for a long time. Even under conditions of frequent vibrations in power plants, it can tightly adhere to the surface of the equipment to avoid insulation gaps.

（3） Waterproof, moisture-proof, and corrosion-resistant, extending service life

There is water vapor, dust, and a small amount of corrosive media in the production environment of power plants. Traditional insulation materials are prone to moisture absorption and corrosion, leading to a decrease in insulation performance. Calcium silicate board has undergone special waterproof treatment, with a volumetric water absorption rate of ≤ 15%. It can maintain stable insulation performance in humid environments and is not prone to mold growth. At the same time, it has strong chemical stability and can resist the corrosion of corrosive substances such as sulfur dioxide and nitrogen oxides in power plant flue gas, effectively avoiding the insulation layer from falling off due to corrosion. Its service life can reach more than 10 years, greatly reducing maintenance costs in the later stage.

（4） Environmentally friendly, non-toxic and easy to construct, compatible with green production

With the increasing demand for environmental protection, power plants are paying more attention to the environmental friendliness of insulation materials. Calcium silicate board has no harmful gas emissions during the production process, and the finished product does not contain toxic substances such as formaldehyde and benzene. It does not release toxic smoke during combustion and meets national environmental standards. In addition, calcium silicate board has uniform specifications (conventional size 1200mm × 600mm, thickness can be customized 50-150mm), light weight (volume density ≤ 200kg/m ³), and does not require heavy equipment during construction. It can be directly cut and spliced, greatly shortening the installation period and reducing the impact on the normal production of the power plant.

2、 Core application scenarios of calcium silicate board in power plants

Based on the above advantages, calcium silicate board can play an important role in various key areas of power plants, and the specific application scenarios are as follows:
（1） Boiler system insulation
Calcium silicate board can be used as the main insulation layer or outer protective material in the furnace wall, flue, economizer and other parts of power plant boilers. It can not only block the loss of high-temperature heat, but also protect the boiler body from external environmental erosion. At the same time, its high-strength characteristics can reduce the risk of cracking of the furnace wall caused by high-temperature expansion.
（2） Steam pipeline insulation
The main steam pipeline and reheated steam pipeline of the power plant are the key areas of heat loss. The use of calcium silicate board insulation can effectively reduce the heat dissipation loss of the pipeline. When used in conjunction with the outer anti-corrosion layer, it can also resist the erosion of condensed water in the pipeline, extend the service life of the pipeline, and ensure the efficiency of steam transmission.
（3） Thermal insulation of turbine building
The equipment foundation, walls, and pipeline supports in the turbine building can be insulated and protected with calcium silicate board. Its waterproof and moisture-proof performance can adapt to the humid environment in the building, and its high-strength characteristics can withstand the external impact caused by equipment vibration, providing a guarantee for the stable operation of the turbine.
（4） Thermal insulation of flue gas desulfurization system
In the insulation of the outer walls of the flue gas desulfurization tower and absorption tower in the power plant, calcium silicate board can resist the corrosive media generated during the desulfurization process, while blocking the heat loss inside the tower, ensuring that the desulfurization reaction proceeds at an appropriate temperature and improving the desulfurization efficiency.

3、 Rosewool Insulation Refractory Co.,Ltd: a reliable supplier of calcium silicate board for power plants

As a professional manufacturer of insulation and refractory materials, rosetexwool has become the preferred partner for purchasing calcium silicate boards for power plants with three core advantages:
（1） Customized production to meet the exclusive needs of power plants
We conduct in-depth research on the differences in operating conditions of different types of power plants (thermal power, hydropower, new energy power plants), and can customize calcium silicate board products with different thicknesses, densities, and waterproof levels according to customer equipment size, temperature range, anti-corrosion requirements, etc. For example, for high-temperature flue gas ducts in thermal power plants, high-temperature resistant enhanced calcium silicate boards can be produced; For the humid environment of hydropower plants, high waterproof calcium silicate boards can be customized to ensure that the products accurately match actual needs. （2） Strict quality control ensures stable and compliant products
The company has established a full process quality control system from raw materials to finished products: high-quality raw materials such as high-purity quartz sand, cement, and special fibers are selected, and automated production lines are used to accurately control the ratio and molding process. The finished products undergo 15 strict tests, including high temperature resistance testing, compressive strength testing, and water absorption testing, to ensure that each batch of products meets the GB/T 7019-2018 "Test Methods for Fiber Cement Products" standard, and comes with authoritative testing reports, allowing customers to use them worry free.
（3） Full cycle service, reducing cooperation costs
We provide full cycle services for power plant customers, including preliminary scheme design, mid-term construction guidance, and after-sales maintenance. In the early stage, we dispatch a technical team to visit the site and develop personalized insulation plans for free; Arrange professional personnel to provide on-site guidance and solve installation difficulties in the mid-term; Establish customer files in the later stage, regularly follow up on product usage, provide timely maintenance suggestions and material supply. In addition, the company has warehouse centers in Henan, Hebei, Shandong and other places, which can achieve nearby delivery, shorten delivery cycles, and reduce logistics costs.

Technical parameters of calcium silicate insulation board

Items \ Product	Calcium silicate board
Classified Tem (℃)	1000℃/1832℉
Density (kg/m³)	200-500
Bending Strength (Mpa)	≥0.5
Conpressive Strength (Mpa)	≥0.9
Thermal Conductivity （w/m.k）	≤0.056
Linear Shrinkage （%）	≤1.5
Max. working Tem. (℃)	650/1000/1100
Size (mm)	1000500/600300

4、 Joining hands with rosetexwool to build an efficient insulation system for power plants

Calcium silicate board, as a high-quality choice for power plant insulation, has been widely recognized in the industry for its performance advantages and application value. Zhengzhou rosetexwool has always been committed to providing high-performance and cost-effective calcium silicate board products and solutions for power plants with "quality as the foundation and service as the soul". It has helped more than 300 power plants across the country achieve energy conservation, consumption reduction, and safe production.

If your power plant is planning to upgrade its insulation system or needs customized calcium silicate board products, please feel free to contact rosetexwool. Let's work together with professional products and services to build a solid insulation defense line for your power plant, and jointly promote the green and efficient development of the power industry!

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