阅读说明：本技术 一种高强度泡沫玻璃的制备方法 (Preparation method of high-strength foam glass ) 是由 文卫雄 韩志明 于 2019-12-10 设计创作，主要内容包括：本发明公开一种高强度泡沫玻璃的制备方法,具体包括以下步骤：1)首先,将重量比计的以下组分混合研磨至粒度为20-30um：玻璃80～90份,气相二氧化硅5～10份,炭黑0.5～2份,碳酸钠 0.1～0.2份,氧化钙 0.2～0.4份,高岭土 2-3份；2)其次,将上述研磨混合原料粉投入窑炉的模具中升温至650～700℃,保温35～40min,然后升温至900～920℃,保温50～55min,再降温至300～450℃,恒温静置10～15min,冷却至室温即得泡沫玻璃；本发明制备的泡沫玻璃发泡均匀,强度高。(The invention discloses a preparation method of high-strength foam glass, which specifically comprises the following steps: 1) firstly, mixing and grinding the following components in percentage by weight to a particle size of 20-30 um: 80-90 parts of glass, 5-10 parts of fumed silica, 0.5-2 parts of carbon black, 0.1-0.2 part of sodium carbonate, 0.2-0.4 part of calcium oxide and 2-3 parts of kaolin; 2) secondly, putting the ground mixed raw material powder into a mold of a kiln, heating to 650-700 ℃, preserving heat for 35-40 min, then heating to 900-920 ℃, preserving heat for 50-55 min, then cooling to 300-450 ℃, standing at constant temperature for 10-15 min, and cooling to room temperature to obtain foam glass; the foam glass prepared by the invention has uniform foaming and high strength.)

1. The preparation method of the high-strength foam glass is characterized by comprising the following steps:

1) firstly, mixing and grinding the following components in percentage by weight to a particle size of 20-30 um: 80-90 parts of glass, 5-10 parts of fumed silica, 0.5-2 parts of carbon black, 0.1-0.2 part of sodium carbonate, 0.2-0.4 part of calcium oxide and 2-3 parts of kaolin;

2) and secondly, putting the ground mixed raw material powder into a mold of a kiln, heating to 650-700 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 35-40 min, heating to 900-920 ℃ at a heating rate of 18-20 ℃/min, preserving heat for 50-55 min, cooling to 300-450 ℃, standing at a constant temperature for 10-15 min, and cooling to room temperature to obtain the foam glass.

2. The method for preparing high strength foam glass according to claim 1, wherein the glass is waste glass.

3. The preparation method of the high-strength foam glass according to claim 1, wherein the weight ratio of the components is as follows: 90 parts of glass, 8 parts of fumed silica, 1.5 parts of carbon black, 0.2 part of sodium carbonate, 0.3 part of calcium oxide and 3 parts of kaolin.

4. The method for preparing high-strength foam glass according to claim 1, wherein in the step 2), the ground mixed raw material powder is put into a mold of a kiln, heated to 700 ℃ at a heating rate of 15 ℃/min, kept for 40min, heated to 920 ℃ at a heating rate of 18 ℃/min, kept for 50min, cooled to 300 ℃, kept at a constant temperature for 15min, and cooled to room temperature to obtain the foam glass.

Technical Field

The invention relates to a preparation method of high-strength foam glass.

Background

The foam glass is an inorganic non-metallic glass material prepared from cullet, a foaming agent, a modified additive, a foaming promoter and the like through fine crushing, uniform mixing, high-temperature melting, foaming and annealing. The bubble generator is composed of a large number of uniform bubble structures with the diameter of 1-2 mm. The foam glass has the advantages of light weight, small heat conductivity coefficient, small water absorption, no combustion, no mildew, corrosion resistance, no toxicity, stable physical and chemical properties and the like, is widely applied to the fields of petroleum, chemical engineering, underground engineering, national defense and military industry and the like, can achieve the effects of heat insulation, heat preservation, cold preservation and sound absorption, is also widely applied to the heat insulation of outer walls and roofs of civil buildings, and becomes a high-grade wall heat-insulating material and a roof heat-insulating material of urban civil buildings along with the increasing requirement of human on environmental protection. However, in the existing production process of foam glass, the defects of non-uniform pore diameter and low strength are easy to occur.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: aiming at the defects of uneven pore diameter and lower strength of the prior foam glass, the preparation method of the foam glass with even foaming and high strength is provided.

The technical scheme adopted by the invention is as follows: a preparation method of high-strength foam glass specifically comprises the following steps:

1) firstly, mixing and grinding the following components in percentage by weight to a particle size of 20-30 um: 80-90 parts of glass, 5-10 parts of fumed silica, 0.5-2 parts of carbon black, 0.1-0.2 part of sodium carbonate, 0.2-0.4 part of calcium oxide and 2-3 parts of kaolin;

2) and secondly, putting the ground mixed raw material powder into a mold of a kiln, heating to 650-700 ℃ at a heating rate of 10-15 ℃/min, preserving heat for 35-40 min, heating to 900-920 ℃ at a heating rate of 18-20 ℃/min, preserving heat for 50-55 min, cooling to 300-450 ℃, standing at a constant temperature for 10-15 min, and cooling to room temperature to obtain the foam glass.

The glass is waste glass, glass slag and the like, waste utilization can be realized, and the environment is protected.

Preferably, the weight ratio of each component in step 1) is as follows: 90 parts of glass, 8 parts of fumed silica, 1.5 parts of carbon black, 0.2 part of sodium carbonate, 0.3 part of calcium oxide and 3 parts of kaolin;

preferably, in the step 1), the ground mixed raw material powder is put into a mold of a kiln, the temperature is raised to 700 ℃ at the heating rate of 15 ℃/min, the temperature is kept for 40min, then the temperature is raised to 920 ℃ at the heating rate of 18 ℃/min, the temperature is kept for 50min, the temperature is lowered to 300 ℃, the mixture is kept at a constant temperature for 15min, and the mixture is cooled to room temperature to obtain the foam glass.

The beneficial technical effects of the invention are as follows: according to the invention, the raw materials are mixed and ground to a certain particle size, so that a more uniform closed pore channel can be foamed, and the strength of the foam glass can be effectively improved by combining the control of foaming time and temperature and adding the kaolin with improved strength. The foam glass provided by the invention has the advantages that the main raw material is solid waste glass, the waste is changed into valuable things at low cost, and the foam glass is high-speed, rapid and safe, so that the solid waste can be comprehensively utilized as resources, and the foam glass has remarkable economic value, social value and ecological value; the prepared foam glass material has bubbles with uniform particle size, high porosity, compression strength and breaking strength, and excellent high temperature resistance, corrosion resistance, water permeability, water retention, air permeability, fire resistance, heat insulation and sound absorption.

Detailed Description

The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples.