Inorganic intercalated vermiculite insulation refractory material and preparation method thereof

Abstract

The invention relates to an inorganic intercalated vermiculite insulation refractory material and a preparation method thereof. In the technical scheme, the preparation method comprises the following steps: calcinating and activating raw vermiculite ore for 2-8 hours at the temperature of 500-650 DEG C, modifying for 2-10 hours in acid solution of 0.1-1.0mol / l, eluting and drying; preparing 2-5 weight percent of suspension with the eluted and dried vermiculite and poly-hydroxy-aluminum cation precursor solution, stirring for 4-8 hours at the temperature of 80-100 DEG C, eluting and drying, thereby obtaining poly-hydroxy-aluminum cation precursor intercalated vermiculite; calcinating the poly-hydroxy-aluminum cation precursor intercalated vermiculite for 4-6 hours at the temperature of 500-650 DEG C, thereby obtaining inorganic intercalated vermiculite; and finally mixing 40-80 weight percent of inorganic intercalated vermiculite and 20-60 weight percent of forsterite, adding 10-20 weight percent of aluminium dihydrogen phosphate, forming through stirring and pressing, and carrying out heat treatment at the temperature of 500-650 DEG C, thereby obtaining the inorganic intercalated vermiculite insulation refractory material. The invention has the advantages of low heat conduction coefficient at high temperature, high strength and wide application scope.

Description

technical field

[0001] The invention belongs to the technical field of heat-insulating refractory materials, and in particular relates to an inorganic intercalated vermiculite heat-insulating refractory material and a preparation method thereof. Background technique

[0002] It is an effective way to save energy by researching and developing high-quality heat-insulating refractory materials and using them reasonably in industrial kilns. It can not only increase the life of the kiln, but also improve the quality of products, reduce heat loss, improve heat energy utilization efficiency and reduce energy waste, so as to achieve the purpose of saving energy and reducing product costs. Therefore, the demand for effective high-temperature insulation materials is becoming more and more urgent.

[0003] Vermiculite is a dioctahedral or trioctahedral aluminosilicate mineral with a 2:1 structural unit layer and exchangeable cations and water molecules between the layers. The interlay...

Examples

Embodiment 1

[0016] An inorganic intercalated vermiculite heat-insulating refractory material and a preparation method thereof. First, calcinate and activate the vermiculite raw ore at 500-550°C for 2-4 hours, then place it in 0.1-0.5mol / L hydrochloric acid solution for modification for 2-8 hours, elute and dry; The vermiculite and the polyhydroxyaluminum cation precursor solution are prepared into a 2-4wt% suspension, stirred at 80-90°C for 4-6 hours, eluted and dried, and the polyhydroxyaluminum cation precursor intercalated vermiculite stone; then calcining the vermiculite intercalated with the polyhydroxyaluminum cation precursor at a temperature of 500-550° C. for 4-6 hours to obtain the inorganic intercalated vermiculite.

[0017] Mix 40-60wt% inorganic intercalation vermiculite and 40-60wt% forsterite, add 10-15wt% aluminum dihydrogen phosphate, stir and press molding, and heat treatment at 500-600°C to obtain inorganic Intercalated vermiculite insulation refractory material.

[0...

Embodiment 2

[0020] An inorganic intercalated vermiculite heat-insulating refractory material and a preparation method thereof. First, calcinate and activate the raw vermiculite at 550-600°C for 4-8 hours, then place it in 0.1-0.6mol / L oxalic acid solution for modification for 4-10 hours, elute and dry; The vermiculite and the polyhydroxyaluminum cation precursor solution are prepared into a 2-4wt% suspension, stirred at 85-95°C for 5-8 hours, eluted and dried, and the polyhydroxyaluminum cation precursor intercalated vermiculite stone; and then calcining the vermiculite intercalated with the polyhydroxyaluminum cation precursor at a temperature of 550-650°C for 4-6 hours to obtain the inorganic intercalated vermiculite.

[0021] Mix 60-70wt% inorganic intercalation vermiculite and 30-40wt% forsterite, add 12-18wt% aluminum dihydrogen phosphate, stir and press molding, and heat treatment at 580-650°C to obtain inorganic Intercalated vermiculite insulation refractory material.

[0022] Th...

Embodiment 3

[0023] An inorganic intercalated vermiculite heat-insulating refractory material and a preparation method thereof. First, calcinate and activate the vermiculite raw ore at 520-650°C for 3-6 hours, then place it in 0.5-1.0mol / L nitric acid solution for modification for 5-10 hours, elute and dry; The vermiculite and the polyhydroxyaluminum cation precursor solution are made into a 3-5wt% suspension, stirred at 85-100°C for 4-8 hours, eluted and dried, and the polyhydroxyaluminum cation precursor intercalated vermiculite stone; calcining the vermiculite intercalated with the polyhydroxyaluminum cation precursor at a temperature of 600-650°C for 4-6 hours to obtain the inorganic intercalated vermiculite.

[0024] Mix 65-75wt% inorganic intercalation vermiculite and 25-35wt% forsterite, add 14-18wt% aluminum dihydrogen phosphate, stir and press molding, and heat treatment at 500-650°C to obtain inorganic Intercalated vermiculite insulation refractory material.

[0025] The main p...

technical field

[0001] The invention belongs to the technical field of heat-insulating refractory materials, and in particular relates to an inorganic intercalated vermiculite heat-insulating refractory material and a preparation method thereof. Background technique

[0002] It is an effective way to save energy by researching and developing high-quality heat-insulating refractory materials and using them reasonably in industrial kilns. It can not only increase the life of the kiln, but also improve the quality of products, reduce heat loss, improve heat energy utilization efficiency and reduce energy waste, so as to achieve the purpose of saving energy and reducing product costs. Therefore, the demand for effective high-temperature insulation materials is becoming more and more urgent.

[0003] Vermiculite is a dioctahedral or trioctahedral aluminosilicate mineral with a 2:1 structural unit layer and exchangeable cations and water molecules between the layers. The interlay...

Examples

Embodiment 1

[0016] An inorganic intercalated vermiculite heat-insulating refractory material and a preparation method thereof. First, calcinate and activate the vermiculite raw ore at 500-550°C for 2-4 hours, then place it in 0.1-0.5mol / L hydrochloric acid solution for modification for 2-8 hours, elute and dry; The vermiculite and the polyhydroxyaluminum cation precursor solution are prepared into a 2-4wt% suspension, stirred at 80-90°C for 4-6 hours, eluted and dried, and the polyhydroxyaluminum cation precursor intercalated vermiculite stone; then calcining the vermiculite intercalated with the polyhydroxyaluminum cation precursor at a temperature of 500-550° C. for 4-6 hours to obtain the inorganic intercalated vermiculite.

[0017] Mix 40-60wt% inorganic intercalation vermiculite and 40-60wt% forsterite, add 10-15wt% aluminum dihydrogen phosphate, stir and press molding, and heat treatment at 500-600°C to obtain inorganic Intercalated vermiculite insulation refractory material.

[0...

Embodiment 2

[0020] An inorganic intercalated vermiculite heat-insulating refractory material and a preparation method thereof. First, calcinate and activate the raw vermiculite at 550-600°C for 4-8 hours, then place it in 0.1-0.6mol / L oxalic acid solution for modification for 4-10 hours, elute and dry; The vermiculite and the polyhydroxyaluminum cation precursor solution are prepared into a 2-4wt% suspension, stirred at 85-95°C for 5-8 hours, eluted and dried, and the polyhydroxyaluminum cation precursor intercalated vermiculite stone; and then calcining the vermiculite intercalated with the polyhydroxyaluminum cation precursor at a temperature of 550-650°C for 4-6 hours to obtain the inorganic intercalated vermiculite.

[0021] Mix 60-70wt% inorganic intercalation vermiculite and 30-40wt% forsterite, add 12-18wt% aluminum dihydrogen phosphate, stir and press molding, and heat treatment at 580-650°C to obtain inorganic Intercalated vermiculite insulation refractory material.

[0022] Th...

Embodiment 3

[0023] An inorganic intercalated vermiculite heat-insulating refractory material and a preparation method thereof. First, calcinate and activate the vermiculite raw ore at 520-650°C for 3-6 hours, then place it in 0.5-1.0mol / L nitric acid solution for modification for 5-10 hours, elute and dry; The vermiculite and the polyhydroxyaluminum cation precursor solution are made into a 3-5wt% suspension, stirred at 85-100°C for 4-8 hours, eluted and dried, and the polyhydroxyaluminum cation precursor intercalated vermiculite stone; calcining the vermiculite intercalated with the polyhydroxyaluminum cation precursor at a temperature of 600-650°C for 4-6 hours to obtain the inorganic intercalated vermiculite.

[0024] Mix 65-75wt% inorganic intercalation vermiculite and 25-35wt% forsterite, add 14-18wt% aluminum dihydrogen phosphate, stir and press molding, and heat treatment at 500-650°C to obtain inorganic Intercalated vermiculite insulation refractory material.

[0025] The main p...