The bulk density and thermal conductivity of refractories directly affect the heat storage loss and heat loss of the kiln. Generally, the thermal conductivity (bulk density) of the kiln light insulation refractories is reduced by 20%, and the kiln heat loss can be reduced under the same conditions. (heat storage loss) 20%. Therefore, vigorously developing the insulation material industry, developing and researching low-cost, environmentally-friendly, high-performance, lightweight, heat-insulating and heat-resistant materials are of great significance to energy-saving in high-temperature industrial furnaces.
The traditional lightweight heat-resistant materials used in industrial furnaces include aluminosilicate lightweight firebricks, high-alumina lightweight firebricks, alumina hollow spheres, and refractory fiber products. The former three mainly have high thermal conductivity. High heat storage, poor thermal shock resistance, short service life and poor energy saving during use, wear hammers and the latter, although energy-saving effect is good, but its high cost, high temperature gas-solid two-phase flow Erosion wear performance is poor, and there is also a risk of cancer, which severely limits its wide application.
Sea sand, the sand in the sea. Sea sand is mainly divided into three categories: construction, marine sand, industrial sand and iron, steel sand. The industrial sea sand can be divided into sand, calcareous sand, and heavy sand, etc., and its production only accounts for about 10% of the total amount of sea sand, but it is widely used.
Calcium hexaaluminate (CaAl12O19 or CA6) is a new type of lightweight, high temperature resistant material that exhibits excellent thermal conductivity, volume stability, thermal shock resistance, spalling resistance, slag resistance, and chemical stability at high temperatures. performance. Calcium hexaaluminate material was prepared using industrial calcium carbonate or calcium oxide and industrial aluminum hydroxide or industrial alumina as raw materials.
Aluminum roller shutter doors are automatic roll up doors, fit for industrial factory, warehouse, residential garages and also commercial shops. Its slat is made from double layer aluminum sheet, filled with polyurethane foam inside. So it is thermal insulated and noise proof.
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