3results about How to "Small bulk density" patented technology

This invention discloses a negative carbon lightweight aggregate based on CO2 mineralization of coal-based solid waste and its preparation method, belonging to the technical field of solid waste resource utilization and low-carbon building materials. The method uses coal-based solid waste such as fly ash and coal slag as main raw materials, introducing uniform micropores through spray granulation with a trace amount of hydrogen peroxide solution. After pre-curing and drying, it is then mineralized and solidified using a low-concentration CO2 atmosphere. This method eliminates the need for cement or other cementing materials, resulting in low cost and no indirect carbon emissions. Furthermore, by synergistically controlling the hydrogen peroxide foaming and CO2 mineralization enhancement processes, the bulk density of the aggregate is significantly reduced; the resulting aggregate has a low bulk density (630~860 kg / m³). 3 With a compressive strength of 4.1~6.0MPa and a water absorption rate of 14~20%, it can meet the requirements of super high-rise buildings, large-span structures, prefabricated components, and the reinforcement and renovation of old buildings, significantly increasing the applicability and economy of coal-based solid waste lightweight building aggregate.

The application discloses a heat-preservation and heat-insulation composite tin bath top cover brick and a preparation method thereof, and belongs to the technical field of heat-insulation brick preparation. The application comprises the following raw material components in parts by weight: 80-100 parts of modified refractory material, 15-20 parts of heat-resistant aerogel, 10-15 parts of composite binder, 5-8 parts of water glass and 8-10 parts of silica sand. In the process of preparing heat-resistant fibers by electrostatic spinning, conductive carbon black is introduced to improve the process efficiency, then the carbon structure is removed by calcination, and hydroxyl groups are introduced to improve the contact area and reaction activity of the heat-resistant fibers and the remaining materials, and the hydroxyl groups are used as the filling structure of the heat-resistant aerogel, the modified refractory material and the composite binder to improve the composite performance of the materials. After mixing and pressing, the lightweight, high-temperature deformation-resistant and compression-resistant heat-preservation and heat-insulation composite top cover brick is obtained.

This invention relates to the field of new yarn materials technology, and more particularly to a thermally insulating biodegradable PLA napped composite yarn and its preparation method. The yarn uses core-sheath structure PLA filaments as the base yarn, with a core layer of PLA and a sheath layer of low-melting-point PLA or copolymer PLA. The monofilament cross-section is irregular and / or hollow. Air blowing is used to form loop / arc loop pile structures on the surface of the base yarn. Subsequently, under restricted shrinkage conditions, the pile is locked and shaped, with the locking temperature controlled above the sheath softening temperature and below the core melting peak, causing the sheath to soften locally at the contact points to form point-bonding locking points to fix the pile. The pile height quantile, coefficient of variation, and bulk index are detected online, and the airflow, feed difference, and shaping parameters are adjusted in a closed loop to achieve structural and performance stability during continuous production. This solution combines high bulk, high warmth retention, washability retention, and batch consistency.