| 摘要 |
FIELD: process engineering.SUBSTANCE: this invention relates to production of foam glass granulate. Proposed method comprises preparation of initial components of the mix including 80-95% of glass and 5-20% of liquid glass hydrate with a portion of crystallisation water in amount of 1-2 wt % of solid substance. Note here that said liquid glass hydrate makes a sole foaming agent. Glass is ground and initial materials are mixed, then pelletised to get green granulate. Said green granulate is mixed with separation agent taken in amount of 10-40% of the mix. The latter comprises green granulate and separation agent. Said mix is heated to processing temperature. Said temperature is as high as glass minimum sintering temperature decreased by liquid glass hydrate and smaller than glass fusion temperature. This allows, at primary stage, to close pores on green granulate grain surface and, at second stage, to release crystallisation water from said liquid glass hydrate to cause its thermal expansion. This makes green granulate grains swell to make granulate from foam glass. Now, granulate is cooled down.EFFECT: decreased water absorption.14 cl |
