Process for producing modified reinforced refractory cement draught flue

Abstract

The invention discloses a process for producing a modified reinforced refractory cement draught flue. The process comprises the following steps: 1, adding 2 cubic meters of water in a stainless steel water tank with a volume of 3 cubic meters, pouring 500 kilograms of magnesium oxide into the water for impregnation to obtain concentrated water of which the concentration is measured by a gravitometer to be 25 degree, and adding a modifier; 2, pouring 50 kilograms of magnesium oxide and 15 kilograms of sawdust or fly ash into a stirrer for stirring, adding the concentrated water obtained in step 1, and performing stirring to obtain a magnesium oxychloride cement mixture; 3, pouring the mixture obtained in step 2 onto a mold, attaching fiberglass gridding cloth to the poured layer, and performing secondary painting attachment pouring to obtain a flue blank; 4, placing the flue blank obtained in step 3 at room temperature for 10 hours, and performing demolding to obtain the modified reinforced refractory cement draught flue. The process has the advantages of low damage and cracking rate, high fire resistance, light weight, easiness for assembling and disassembling, high pressure bearing capacity, strong strength, high impermeability and moisture regain resistance, convenience for production and the like.

Description

technical field [0001] The invention relates to the technical field of flues, in particular to a production process for modified and enhanced refractory cement exhaust flues. Background technique [0002] A flue is a tubular device for exhaust gas and smog discharge. Residential flue refers to a vertical pipe product used to remove kitchen smoke or bathroom exhaust gas, also known as exhaust duct, ventilation duct, and residential exhaust duct. The flue is mostly prefabricated with sulphoaluminate cement with alkali-resistant glass fiber mesh or ordinary Portland cement with steel wire mesh and other reinforcing materials. National standards such as "Code for Residential Buildings" and "Code for Fire Protection in Building Design" stipulate that the fire resistance limit of exhaust ducts in residential buildings should not be lower than 1.00h, but it is difficult for flues made of cement to reach the fire resistance limit of not less than 1.0h. Requirements, and the flue ma...

AI Technical Summary

Problems solved by technology

National standards such as "Code for Residential Buildings" and "Code for Fire Protection in Building Design" stipulate that the fire resistance limit of exhaust ducts in residential buildings should not be lower than 1.00h, but it is difficult for flues made of cement to achieve a fire resistance limit of not less than 1.0h. Requirements, and the flue made of cement has the disadvantages of heavy weight, difficult loading and unloading, low pressure, low strength, low resistance to flexible impact, easy damage, easy cracks, etc.