Method for directly producing foamed glass by using slag tapping boil slag

Abstract

The invention relates to a method for directly producing foam glass by utilizing slag of a slag tapping boiler, comprising the following steps that: aiming at coal quality with different compositions, according to the principle of 'lacking what repair what', through adding chunk glass and calcium oxide in the slag tapping boiler, the chemical compositions of the slag are 45 to 65 percent of SiO2, 5 to 30 percent of Al2O3, 0 to 15 percent of Fe2O3, 10 to 30 percent of CaO+MgO and 0 to 14 percent of Na2O+K2O; the obtained slag meeting the requirement directly undergoes water quench in a water quench tank under the slag tapping boiler, vitreous body materials for preparing the foam glass are obtained; the prior technology for preparing the foam glass is adopted, and the foam glass is obtained finally through milling, moulding, foaming, cooling and annealing the obtained vitreous body materials. The method fully utilizes flyash slag and simultaneously reduces the production cost of the foam glass.

Description

technical field [0001] The invention relates to a method for directly producing fly ash foam glass by using liquid slag discharged from a liquid slag removal furnace, and belongs to the field of solid waste utilization and preparation of inorganic non-metallic materials. Background technique [0002] Foam glass is a kind of porous glass material, which is composed of a large number of uniform bubble structures with a diameter of 0.1-3mm. The bubbles account for 80%-90% of the total volume, and the apparent density is 120-500kg / m 3 . Due to its superior heat insulation, sound absorption, fire prevention, moisture resistance and other properties, it is widely used in construction, petrochemical and other industries. [0003] At present, the raw materials for foam glass production in my country are all waste materials, such as waste glass, tailings, fly ash, volcanic lava, pumice, perlite, etc. There is already a mature method of producing foam glass from fly ash. The "two-s...

AI Technical Summary

Problems solved by technology

The main problem of this method is that the product cost is high and the energy consumption is high

The main reason for the high cost of the product is that there are processes such as purchase, transportation, and cleaning of quartz, and the hardness of quartz is high, and the energy consumption of ball milling is high.

If the quartz is re-melted and water-quenched for ball milling, although the energy consumption of ball milling is reduced, the cost of melting will be increased, and the above-mentioned process will be fired and cooled twice, resulting in a further increase in energy consumption

[0004] There have been patents on the use of power plant fly ash to prepare silicate products such as glass-ceramic and rock wool, and a beneficial attempt has been made to the use of fly ash, but these patents belong to the "outside the furnace" of fly ash In terms of utilization, there are problems of high energy consumption and high cost;