CN103193390B - The preparation method of carbide slag foam glass thermal insulation material - Google Patents

Abstract

The present invention relates to a kind of preparation method of carbide slag foam glass thermal insulation material, it is for main raw material with industrial residue carbide slag and discarded glass cullet, be whipping agent with sodium carbonate, then mix suitable supplementary additive, form through ball milling, preheating, sintering, foaming, annealing.The multicellular glass pore texture that the present invention obtains is good, and physical strength is high, lightweight, and water-intake rate is low, and thermal conductivity is little, has good insulation, effect of heat insulation.And achieve the recycling of solid waste, while protection of the environment, the quality of material can be improved, cost-saving, there is good economic benefit.

Description

The preparation method of carbide slag foam glass thermal insulation material

Technical field

The present invention relates to a kind of inorganic heat insulation material, be specifically related to carbide slag foam glass thermal insulation material and preparation method thereof.

Technical background

Along with China's rapid development of economy, the contradiction of the energy and environmental issue.Building energy conservation has obtained the great attention of people as the emphasis of energy conservation, its object is to reduce building energy consumption, reduces environmental pollution simultaneously.The approach of building energy conservation has a lot, adopts heat insulating material to be wherein one of the most effective approach.

Multicellular glass is the new green environment protection material of construction that a kind of thermal and insulating performance is superior.They are raw material based on cullet, industrial waste or mine waste residue etc., mix the additives such as suitable whipping agent, form through high-temperature firing, there is the advantages such as apparent density is little, physical strength is high, water-intake rate is low, moisture permeable coefficient is low, the coefficient of expansion is little, freezing and thawing performance is good, thermal conductivity is low, thermal stability is good, do not burn, corrosion-resistant, processability is good.

At present, along with China's industrial expansion, the quantity discharged of carbide slag rises year by year, and accumulative volume of cargo in storage has reached 1.3 hundred million tons, and carbide slag is stacked or landfill by domestic production producer major part on the spot.So not only occupy valuable land resources, and severe contamination is caused to air, surface water and groundwater.Therefore, how carbide slag being converted into available resource is urgent problem.Using carbide slag as the part material preparing Foam Glass, not only contribute to the problem of environmental pollution solving solid waste, the physical strength of multicellular glass can be improved simultaneously, reduce costs, there is good economic benefit and environmental benefit.

Summary of the invention

The invention provides a kind of preparation method of carbide slag foam glass thermal insulation material, starting material adopt glass powder and carbide slag, are whipping agent, mix suitable supplementary additive, form through preheating, sintering, foaming, annealing with sodium carbonate.Object is the recycling realizing solid waste, and protection of the environment improves quality of materials simultaneously, reduces costs.

For achieving the above object, the technical solution used in the present invention is:

(1) discarded glass cullet are milled to below 200 orders, carbide slag are crossed 200 mesh sieves;

(2) by the glass powder of massfraction by 70%-90%, the carbide slag of 10%-30%, the admixture Homogeneous phase mixing of 4-10%, adds appropriate water, obtains the admixtion of carbide slag multicellular glass after stirring;

(3) above-mentioned admixtion is put into high temperature steel mould and make flats base substrate, vibrate 1-5 minute on a vibration table, put into baking oven and dry;

(4) base substrate after oven dry is put into process furnace to heat, fires program as follows:

Pre-heating stage, rises to 600 DEG C from room temperature with the heat-up rate of 5-10 DEG C/min, is incubated 30 minutes;

In the sintering stage, heat-up rate is warming up to 800-950 DEG C with 10-15 DEG C/min;

Foaming stages, is incubated 20-40 minute under 800-950 DEG C of constant temperature;

Quick cooling stages, speed of cooling is 15-20 DEG C/min, is cooled to 550-650 DEG C;

Annealing stage, cooling rate is 1-2 DEG C/min, is annealed to less than 50 DEG C and obtains carbide slag foam glass thermal insulation material.

Beneficial effect of the present invention is to make full use of solid waste, and the resource recycling realizing solid waste utilizes, and while protection of the environment, improves multicellular glass quality, reduces cost, cost-saving.The carbide slag multicellular glass bubble of preparation is even, and based on encapsulated bubble, water-intake rate is low, and combustionproperty can reach A level, and ultimate compression strength can reach 1-5MPa, density 300-600Kg/m ³, thermal conductivity is 0.063-0.092W/ (mK), manufacture craft of the present invention simply not only can be used for the heat-insulation and heat-preservation on covil construction exterior wall and roof, also can be widely used in the fields such as oil, chemical industry, underground works, defence and military, can reach heat insulation, insulation, cold insulation, sound-absorbing effect.

Embodiment

Example 1, first, by massfraction by the glass powder of 73%, the carbide slag of 18%, the sodium carbonate of 3% and a small amount of supplementary additive Homogeneous phase mixing, add appropriate water, obtain the admixtion of carbide slag multicellular glass after stirring; Above-mentioned admixtion is put into high temperature steel mould and makes flats base substrate, vibrate 3 minutes on a vibration table, put into baking oven and smoke 4 hours, the base substrate after oven dry is put into process furnace and heats, fire program as follows:

Pre-heating stage, rises to 600 DEG C from room temperature with the heat-up rate of 7 DEG C/min, is incubated 30 minutes;

In the sintering stage, heat-up rate is warming up to 900 DEG C with 12 DEG C/min;

Foaming stages, is incubated 40 minutes under 900 DEG C of constant temperature;

Quick cooling stages, with 15 DEG C/min, is cooled to 550 DEG C;

Annealing stage, cooling rate is 1 DEG C/min, is annealed to less than 50 DEG C.

Adopt the carbide slag foam glass thermal insulation material that aforesaid method obtains, its performance is: unit weight 450kg/m ³, ultimate compression strength 3.2MPa, folding strength 1.9MPa, thermal conductivity 0.081W/mk, water-intake rate < 5% (24 hours volume water absorption rates).

Example 2, first, by massfraction by the glass powder of 68%, the carbide slag of 22%, the sodium carbonate of 4% and a small amount of supplementary additive, add appropriate water, obtain the admixtion of carbide slag multicellular glass after stirring; Above-mentioned admixtion is put into high temperature steel mould and makes flats base substrate, vibrate 4 minutes on a vibration table, put into baking oven and smoke 4 hours, the base substrate after oven dry is put into process furnace and heats, fire program as follows:

Pre-heating stage, rises to 600 DEG C from room temperature with the heat-up rate of 7 DEG C/min, is incubated 30 minutes;

In the sintering stage, heat-up rate is warming up to 850 DEG C with 12 DEG C/min;

Foaming stages, is incubated 30 minutes under 850 DEG C of constant temperature;

Quick cooling stages, with 15 DEG C/min, is cooled to 600 DEG C;

Annealing stage, cooling rate is 1 DEG C/min, is annealed to less than 50 DEG C.

Adopt the carbide slag foam glass thermal insulation material that aforesaid method obtains, its performance is: unit weight 370kg/m ³, ultimate compression strength 2.6MPa, folding strength 1.8MPa, thermal conductivity 0.072W/mk, water-intake rate < 5% (24 hours volume water absorption rates).

Example 3, first, by massfraction by the glass powder of 62%, the carbide slag of 27%, the sodium carbonate of 5% and a small amount of supplementary additive, add appropriate water, obtain the admixtion of carbide slag multicellular glass after stirring; Above-mentioned admixtion is put into high temperature steel mould and makes flats base substrate, be placed on shaking table and vibrate 3 minutes, put into baking oven and smoke 4 hours, the base substrate after oven dry is put into process furnace and heats, fire program as follows:

Pre-heating stage, rises to 600 DEG C from room temperature with the heat-up rate of 7 DEG C/min, is incubated 30 minutes;

In the sintering stage, heat-up rate is warming up to 920 DEG C with 12 DEG C/min;

Foaming stages, is incubated 20 minutes under 920 DEG C of constant temperature;

Quick cooling stages, with 15 DEG C/min, is cooled to 650 DEG C;

Annealing stage, cooling rate is 1 DEG C/min, is annealed to less than 50 DEG C.

Adopt the carbide slag foam glass thermal insulation material that aforesaid method obtains, its performance is: unit weight 310kg/m ³, ultimate compression strength 2.3MPa, folding strength 1.5MPa, thermal conductivity 0.067W/mk, water-intake rate < 5% (24 hours volume water absorption rates).

Claims (1)

1. the preparation method of carbide slag foam glass thermal insulation material, is characterized in that comprising the following steps:

(1) discarded glass cullet are milled to below 200 orders, carbide slag are crossed 200 mesh sieves;

(2) by the glass powder of massfraction by 70%-90%, the carbide slag of 10%-30%, the admixture Homogeneous phase mixing of 4-10%, adds appropriate water, obtains the admixtion of carbide slag multicellular glass after stirring;

(3) above-mentioned admixtion is put into high temperature steel mould and make flats base substrate, vibrate 1-5 minute on a vibration table, put into baking oven and dry;

(4) base substrate after oven dry is put into process furnace to heat, fires program as follows:

Pre-heating stage, rises to 600 DEG C from room temperature with the heat-up rate of 5-10 DEG C/min, is incubated 30 minutes;

In the sintering stage, heat-up rate is warming up to 800-950 DEG C with 10-15 DEG C/min;

Foaming stages, is incubated 20-40 minute under 800-950 DEG C of constant temperature;

Quick cooling stages, speed of cooling is 15-20 DEG C/min, is cooled to 550-650 DEG C;

Annealing stage, cooling rate is 1-2 DEG C/min, is annealed to less than 50 DEG C and obtains carbide slag foam glass thermal insulation material.