Foam glass prepared from fused brown corundum dust-removing powder as raw material and preparation method thereof

Abstract

The invention relates to foam glass prepared from fused brown corundum dust-removing powder serving as a raw material and a preparation method thereof. The technical scheme comprises the following steps of: mixing 20 to 50 weight percent of fused brown corundum dust-removing powder and 50 to 80 weight percent of waste flat glass powder, adding 2 to 8 weight percent of foaming agent based on the weight of the mixed powder, and mixing uniformly; filling the mixture into a mould, heating to the temperature of between 850 and 1,100 DEG C in a sintering furnace, and preserving heat for 10 to 30 minutes; and naturally cooling, demoulding and cutting to obtain the foam glass. The fused brown corundum dust-removing powder mainly comprises the following chemical components: 20 to 56 weight percent of Al2O3, 10 to 50 weight percent of SiO2, 0.3 to 20 weight percent of K2O, 2 to 15 weight percent of igloss and 0 to 10 weight percent of Fe2O3+MgO+Na2O+TiO2. The preparation method has the characteristics of a few additives, short process period and easy operation. The volume weight of the product is 250 to 1,200kg / m<3>, the compressive strength is 4 to 20MPa and the heat conductivity is 0.070 to 1.200W / (m*K); and the foam glass is widely applicable and can meet the application requirements in different environments.

Description

technical field [0001] The invention belongs to the technical field of resource utilization and foam glass material preparation. In particular, it relates to a foam glass using electric fused brown corundum dust removal powder as a raw material and a preparation method thereof. Background technique [0002] Fused brown corundum dust removal powder is a solid waste generated during the production of fused corundum. my country is a big producer of fused brown corundum. According to the annual production of 3 million tons of fused brown corundum dust removal powder in my country, and 7% of the dust volume, the annual production of fused brown corundum dust removal powder is as high as 210,000 tons. The chemical composition of fused brown corundum dust removal powder is mainly Al 2 o 3 , SiO 2 、K 2 O, MgO, Fe 2 o 3 、Na 2 Mainly O and CaO, etc., in general, Al 2 o 3 20~56wt%, SiO 2 10~50wt%, K 2 O is 0.3 to 20 wt%. Its chemical composition and content vary depending ...

AI Technical Summary

Problems solved by technology

In the above methods, there is a process of adding raw materials to batch materials and preparing mixed glass powder through melting, quenching, grinding and other processes; in the heating system, there is a process of heat preservation at a specific temperature section, and cooling in the cooling stage of a specific temperature section The rate is slow, the above steps all increase the process time, prolong the process flow, and the process steps are more cumbersome

[0005] "Yellow Phosphorus Slag Lightweight Building Material" (CN101143767A) mainly uses yellow phosphorus slag to add a certain amount of clay as the main raw material to prepare foam glass; this method uses clay as a natural mineral, which is less expensive than using other wastes. Higher; "Method for Producing Foam Glass Using Copper Tailings" (CN101182124A) patented technology, mainly puts copper tailings, waste glass, carbon black, sodium fluorosilicate and sodium phosphate into ball milling tanks and ball mills to below 200 mesh, Put it into a heat-resistant steel mold, move the abrasive tool into a foaming furnace to obtain foam glass through preheating, foaming, foam stabilization and annealing; there are many kinds of additives in this method; "(CN101302077A) patented technology, which mainly uses liquid exhaust furnace slag to produce fly ash slag, add other minerals when the slag is in a molten state, and then cool it in a water quenching pool, prepare foam glass according to the traditional method, and use the traditional method to prepare foam The glass process takes a long time and the steps are cumbersome; the patented technology of "a manufacturing method of lava foam glass" (93110149.2) mainly crushes perlite to 80-100 mesh, then mixes it with 200-300 mesh calcium carbonate, and adds caustic soda and borax , sodium phosphate, vanadium pentoxide or potassium hydroxide aqueous solution, then soaked for 12 hours, dried and fired, this method has a wide variety of additives and takes a long time; Foam glass and its manufacturing method" (CN101113076A) patent technology, mainly uses oil shale as the main raw material, adds appropriate amount of calcium carbonate, basic magnesium carbonate, borax, sodium carbonate, etc. to prepare basic glass, and then adds foaming agent, stabilizer Foaming agent, flux, etc., the foam glass is prepared by the powder method, and the apparent density of the foam glass is 875-1030kg m -3 , water absorption 8-15%; this method is complicated to prepare foam glass, and can not prepare foam glass with lower apparent density