CN103193390A - Preparation method of acetylene sludge foam glass thermal insulation material - Google Patents

Abstract

The invention relates to a preparation method of an acetylene sludge foam glass thermal insulation material. The preparation method comprises the following steps of: taking industrial waste residue, namely acetylene sludge and waste glass cullet as main raw materials and sodium carbonate as a foaming agent, then mixing an appropriate amount of additives in the raw materials, carrying out ball-milling, preheating, sintering, foaming and annealing, thus obtaining the acetylene sludge foam glass thermal insulation material. The foam glass thermal insulation material prepared by the invention has the advantages of good pore structure, high mechanical strength, light weight, low water absorption, small coefficients of thermal conductivity and good thermal insulation effect. The preparation method has the advantages of realizing the resource utilization of solid wastes, improving the quality of the material while protecting the environment, saving cost and having good economic benefits.

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 becomes increasingly conspicuous.Building energy conservation has obtained people's great attention as the emphasis of energy conservation, and its purpose is to reduce building energy consumption, reduces environmental pollution simultaneously.The approach of building energy conservation has a lot, and adopting heat insulating material is one of valid approach wherein.

Multicellular glass is the superior new green environment protection material of construction of a kind of thermal and insulating performance.It is basic material with cullet, industrial waste or mine waste residue etc., mix suitable additives such as whipping agent, form through high-temperature firing, have that 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, advantage such as processability is good.

At present, along with China's industrial expansion, the quantity discharged of carbide slag rises year by year, and the accumulative total volume of cargo in storage has reached 1.3 hundred million tons, and domestic production producer major part is stacked carbide slag or landfill on the spot.So not only taken valuable land resources, and air, surface water and underground water have been caused severe contamination.Therefore, how carbide slag being converted into available resource is urgent problem.With the part material of carbide slag as preparation coal ash foam glass, not only help to solve the problem of environmental pollution of solid waste, can improve the physical strength of multicellular glass simultaneously, reduce cost, have 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 with yellow soda ash, mix suitable supplementary additive, form through preheating, sintering, foaming, annealing.Purpose is to realize the recycling of solid wastes utilization, and the protection environment improves quality of materials simultaneously, reduces cost.

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

(1) will discard below glass cullet ball milling to 200 order, carbide slag will be crossed 200 mesh sieves;

(2) press massfraction with the glass powder of 70%-90%, the carbide slag of 10%-30%, the admixture of 4-10% evenly mixes, and adds an amount of water, gets the admixtion of carbide slag multicellular glass after stirring;

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

(4) base substrate after will drying is put into process furnace and is heated, and it is as follows to fire program:

Pre-heating stage rises to 600 ℃ from room temperature with 5-10 ℃/minute heat-up rate, is incubated 30 minutes;

In the sintering stage, heat-up rate is warming up to 800-950 ℃ with 10-15 ℃/minute;

Foaming stages, insulation is 20-40 minute under 800-950 ℃ of constant temperature;

Quick cooling stages, speed of cooling is 15-20 ℃/minute, is cooled to 550-650 ℃;

Annealing stage, cooling rate is 1-2 ℃/minute, is annealed to and gets the carbide slag foam glass thermal insulation material below 50 ℃.

Beneficial effect of the present invention is to take full advantage of solid waste, realizes the recycling of solid wastes recycle, in the time of the protection environment, improves the multicellular glass quality, reduces cost, saves cost.The carbide slag multicellular glass bubble of preparation is even, and based on encapsulated bubble, water-intake rate is low, and combustionproperty can reach the 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 fields such as oil, chemical industry, underground works, defence and military can be widely used in, the effect of heat insulation, insulation, cold insulation, sound-absorbing can be reached.

Embodiment

Example 1 at first, is pressed massfraction with 73% glass powder, 18% carbide slag, 3% yellow soda ash and a small amount of supplementary additive evenly mix, and add an amount of water, after stirring the admixtion of carbide slag multicellular glass; Above-mentioned admixtion is put into the high temperature steel mould make the flats base substrate, shaking table vibration 3 minutes, put into baking oven and smoked 4 hours, the base substrate after the oven dry is put into process furnace heat, it is as follows to fire program:

Pre-heating stage rises to 600 ℃ from room temperature with 7 ℃/minute heat-up rate, is incubated 30 minutes;

In the sintering stage, heat-up rate is warming up to 900 ℃ with 12 ℃/minute;

Foaming stages, insulation is 40 minutes under 900 ℃ of constant temperature;

Cooling stages with 15 ℃/minute, is cooled to 550 ℃ fast;

Annealing stage, cooling rate is 1 ℃/minute, is annealed to below 50 ℃.

The carbide slag foam glass thermal insulation material that adopts aforesaid method to obtain, 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 at first, is pressed massfraction with 68% glass powder, 22% carbide slag, 4% yellow soda ash and a small amount of supplementary additive add an amount of water, after stirring the admixtion of carbide slag multicellular glass; Above-mentioned admixtion is put into the high temperature steel mould make the flats base substrate, shaking table vibration 4 minutes, put into baking oven and smoked 4 hours, the base substrate after the oven dry is put into process furnace heat, it is as follows to fire program:

Pre-heating stage rises to 600 ℃ from room temperature with 7 ℃/minute heat-up rate, is incubated 30 minutes;

In the sintering stage, heat-up rate is warming up to 850 ℃ with 12 ℃/minute;

Foaming stages, insulation is 30 minutes under 850 ℃ of constant temperature;

Cooling stages with 15 ℃/minute, is cooled to 600 ℃ fast;

Annealing stage, cooling rate is 1 ℃/minute, is annealed to below 50 ℃.

The carbide slag foam glass thermal insulation material that adopts aforesaid method to obtain, 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 at first, is pressed massfraction with 62% glass powder, 27% carbide slag, 5% yellow soda ash and a small amount of supplementary additive add an amount of water, after stirring the admixtion of carbide slag multicellular glass; Above-mentioned admixtion is put into the high temperature steel mould make the flats base substrate, place on the shaking table and vibrate 3 minutes, put into baking oven and smoked 4 hours, the base substrate after the oven dry is put into process furnace heat, it is as follows to fire program:

Pre-heating stage rises to 600 ℃ from room temperature with 7 ℃/minute heat-up rate, is incubated 30 minutes;

In the sintering stage, heat-up rate is warming up to 920 ℃ with 12 ℃/minute;

Foaming stages, insulation is 20 minutes under 920 ℃ of constant temperature;

Cooling stages with 15 ℃/minute, is cooled to 650 ℃ fast;

Annealing stage, cooling rate is 1 ℃/minute, is annealed to below 50 ℃.

The carbide slag foam glass thermal insulation material that adopts aforesaid method to obtain, 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 may further comprise the steps:

(1) will discard below glass cullet ball milling to 200 order, carbide slag will be crossed 200 mesh sieves;

(2) press massfraction with the glass powder of 70%-90%, the carbide slag of 10%-30%, the admixture of 4-10% evenly mixes, and adds an amount of water, gets the admixtion of carbide slag multicellular glass after stirring;

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

(4) base substrate after will drying is put into process furnace and is heated, and it is as follows to fire program:

Pre-heating stage rises to 600 ℃ from room temperature with 5-10 ℃/minute heat-up rate, is incubated 30 minutes;

In the sintering stage, heat-up rate is warming up to 800-950 ℃ with 10-15 ℃/minute;

Foaming stages, insulation is 20-40 minute under 800-950 ℃ of constant temperature;

Quick cooling stages, speed of cooling is 15-20 ℃/minute, is cooled to 550-650 ℃;

Annealing stage, cooling rate is 1-2 ℃/minute, is annealed to and gets the carbide slag foam glass thermal insulation material below 50 ℃.