CN102381842A - Pulverized fuel ash foam glass and preparation method thereof - Google Patents

Abstract

The invention relates to a pulverized fuel ash product, in particular to pulverized fuel ash foam glass and a preparation method thereof, belonging to the technical field of building materials. The pulverized fuel ash foam glass is prepared by taking pulverized fuel ash and waste glass as raw materials, and adding a proper amount of additives such as a foaming agent, a foam stabilizer, a fluxing agent and the like by using a powder sintering method. Industrial waste residues are used as the main raw material, which has important significance for increasing the utilization ratio of the industrial waste residues and reducing environment pollution.

Description

Coal ash foam glass and preparation method thereof

Technical field

The present invention relates to a kind of powdered coal ash product, be specifically related to a kind of coal ash foam glass and preparation method thereof, belong to building material technical field.

Background technology

In large power plant and coal enterprise, all can produce a large amount of waste residues, flyash every day at present, need drop into a lot of expenses for the processing of these dead meals; It is very big to deal with environmental pollution improperly; How these dead meals being passed through to handle, turn waste into wealth, is a problem demanding prompt solution.

Summary of the invention

The objective of the invention is provides a kind of coal ash foam glass and preparation method thereof for overcoming the weak point of above-mentioned prior art.Coal ash foam glass is main raw material with flyash and cullet; And add additives such as an amount of whipping agent, suds-stabilizing agent and fusing assistant; Adopt the powder sintering method to form; Multicellular glass is a kind of porous material of manual manufacture, and it is the glass material that a kind of inside is full of countless small even connections or sealed porosity.Because multicellular glass inside has countless micro-bubbles, make it different in kind in simple glass, but have lightweight, high-strength, fire prevention, nontoxic, do not have advantages such as radioactivity, corrosion-resistant sawing, be a kind of well behaved heat insulating and sound absorbent material; Also can be used as insulating wall material, can reduce the weight of buildings greatly, improve the inner quality of buildings because the main raw material that is adopted is an industrial residue, thereby for the utilization ratio that improves industrial residue with reduce environmental pollution and have an important significance.

The present invention realizes with following technical scheme: a kind of coal ash foam glass is characterized in that: with flyash and cullet is main raw material, and adds additives such as an amount of whipping agent, suds-stabilizing agent and fusing assistant; Adopt the powder sintering method to form, described coal ash foam glass screening formulation is: glass powder: 70-73%, flyash: 20-25%; Water glass 3.5-4.4%; Sodium Silicofluoride 98min 3.6-4.2%, boric acid: 1.2-1.8%, sodium phosphate: 2.3～3.1%.

2, a kind of method for preparing the described coal ash foam glass of claim 1 is characterized in that: comprise the steps:

(1) preheating: because the base substrate thermal conductivity is relatively poor, directly the heat sintering can cause the oxidation of surface carbon, makes foaming inhomogeneous, and in room temperature to 400 ℃, heat-up rate is 5～8 ℃/min for this reason, and at 400 ℃ of insulation 30min;

(2) sintering: the base substrate after the preheating is heated to sintering temperature rapidly, and in sintering process, heat-up rate is 8-10 ℃/min;

(3) foaming: the base substrate behind the sintering is heated to blowing temperature in the speed with 10～15 ℃/min and foams, insulation 8-10h under blowing temperature;

(4) steady bubble and annealing: when foaming finishes, rapidly base substrate is cooled to 600 ℃, is incubated 25-35min, turn off power supply then and naturally cool to room temperature.

Advantage of the present invention is: coal ash foam glass is main raw material with flyash and cullet; And add additives such as an amount of whipping agent, suds-stabilizing agent and fusing assistant; Adopt the powder sintering method to form; Because the main raw material that adopted is an industrial residue, thus for the utilization ratio that improves industrial residue with reduce environmental pollution and have an important significance.

Embodiment

Embodiment,

A kind of method for preparing the described coal ash foam glass of claim 1 comprises the steps:

(1) preheating: because the base substrate thermal conductivity is relatively poor, directly the heat sintering can cause the oxidation of surface carbon, makes foaming inhomogeneous, and in room temperature to 400 ℃, heat-up rate is 8 ℃/min for this reason, and at 400 ℃ of insulation 30min;

(2) sintering: the base substrate after the preheating is heated to sintering temperature rapidly, and in sintering process, heat-up rate is 10 ℃/min;

(3) foaming: the base substrate behind the sintering is heated to blowing temperature in the speed with 15 ℃/min and foams, insulation 10h under blowing temperature;

(4) steady bubble and annealing: when foaming finishes, rapidly base substrate is cooled to 600 ℃, is incubated 35min, turn off power supply then and naturally cool to room temperature.

Claims (2)

1. coal ash foam glass, it is characterized in that: with flyash and cullet is main raw material, and adds additives such as an amount of whipping agent, suds-stabilizing agent and fusing assistant; Adopt the powder sintering method to form, described coal ash foam glass screening formulation is: glass powder: 70-73%, flyash: 20-25%; Water glass 3.5-4.4%; Sodium Silicofluoride 98min 3.6-4.2%, boric acid: 1.2-1.8%, sodium phosphate: 2.3～3.1%.

2. a method for preparing the described coal ash foam glass of claim 1 is characterized in that: comprise the steps:

(1) preheating: because the base substrate thermal conductivity is relatively poor, directly the heat sintering can cause the oxidation of surface carbon, makes foaming inhomogeneous, and in room temperature to 400 ℃, heat-up rate is 5～8 ℃/min for this reason, and at 400 ℃ of insulation 30min;

(2) sintering: the base substrate after the preheating is heated to sintering temperature rapidly, and in sintering process, heat-up rate is 8-10 ℃/min;

(3) foaming: the base substrate behind the sintering is heated to blowing temperature in the speed with 10～15 ℃/min and foams, insulation 8-10h under blowing temperature;

(4) steady bubble and annealing: when foaming finishes, rapidly base substrate is cooled to 600 ℃, is incubated 25-35min, turn off power supply then and naturally cool to room temperature.