Microporous refractory heat-insulating material and manufacturing method thereof

Abstract

The invention relates to a microporous refractory heat-insulating material and a manufacturing method thereof. The microporous refractory heat-insulating material comprises the following materials proportioned by weight portion: 40 to 70 portions of aggregate, 20 to 50 portions of base material, 2 to 8 portions of foaming agent and not more than 5 portions of water, wherein the base materials consists of the following materials proportioned by weight portion: 20 to 30 portions of coagulant ingredient, 2 to 5 portions of coagulant, 2 to 4 portions of expansion agent, 3 to 5 portions of reinforcing agent, 0.2 to 0.6 portion of water reducing agent, 4 to 6 portions of bonding agent, and 2 to 7 portions of foaming agent which is an animal foaming agent or a vegetal animal foaming agent. The manufacturing method is characterized by comprising the following steps: according to the weight mixture ratio of the materials, adding water to the base material; putting the mixture into a foaming mechanical equipment to mix and uniformly stir the mixture; then adding the foaming agent to form uniform foamed mud through stirring; adding the aggregate into uniform foamed mud, uniformly stirring theaggregate and the uniform foamed mud to prepare castable of the microporous refractory heat-insulating material; and subjecting the castable to injection dry molding or in-situ casting framework molding. The microporous refractory heat-insulating material has bending strength greater than 2.0 MPa, compressive strength greater than 3.5 MPa, ultra-low thermal conductivity, volume density between 250 and 300 kg / m<3>, heat conductivity coefficient between 0.03 and 0.18 w / m.k, as well as strong refractory heat-insulating performance.

Description

technical field [0001] The invention belongs to the technical field of heat-insulating and refractory materials, and in particular relates to a microporous refractory and heat-insulating material and a manufacturing method thereof. Background technique [0002] Under the high-temperature conditions of current industrial production, refractory materials and heat-insulating materials are used in combination. Refractory materials are used on the high-temperature side to form high-temperature-resistant working conditions, and various types of heat-insulating materials are added behind the refractory materials. The outermost part is the steel structure. , Under normal conditions, more than three layers are required to form a fire-resistant and heat-insulating composite structure. The higher the operating temperature, the thicker the refractory insulation layer. Generally, the wall thickness of the enclosure structure of industrial furnaces is greater than 500mm, and the temperatu...

AI Technical Summary

Problems solved by technology

The problems in the current application of refractory and heat insulation materials are: the construction is relatively complicated, the material consumption is large, and the geometric dimensions of the corresponding furnace and thermal equipment increase, which increases the occupied area.

[0003] The current heat insulation and refractory materials have poor mechanical strength, wear resistance and slag erosion resistance, so they are not suitable for load-bearing structures of furnaces and parts that directly contact slag, charge, molten metal, etc.