Research on the recycling and resource utilization technology of refractory brick materials

Research on the recycling and resource utilization technology of refractory brick materials is an important and complex field, aiming to reduce resource waste, reduce environmental pollution, and achieve sustainable development. The following is a detailed discussion of the technology in this field:

I. Overview of recycling technology

1. Recycling and treatment methods of waste refractory bricks

Recycling process: The recycling of waste refractory bricks usually includes steps such as crushing, pulverization, screening, magnetic separation, etc. to separate materials of different particle sizes and types. These materials can be used for subsequent reuse according to their characteristics.

Heat treatment method: Some waste refractory bricks can be heat-treated to extract valuable substances, such as metals such as iron and aluminum, or converted into alternative raw materials such as fly ash and slag for cement production or soil improvement.

2. Recycling technology

Reuse as raw materials: After the waste refractory bricks are treated, their composition and particle size are adjusted and reused in the production of refractory materials. For example, waste bricks are used as slag-making materials during smelting and refining, or used to produce amorphous refractory materials (such as castable materials and crushable materials).

Recycled products: New refractory bricks or other refractory products can be made by regenerating waste refractory bricks. These recycled products are often close to or even reach the level of new products in terms of physical properties and chemical stability.

II. Research on resource utilization technology

1. Chemical treatment method

Leaching method: Use chemical reagents (such as acids, alkalis, etc.) to leach valuable metals or compounds in waste refractory bricks. For example, pure sulfuric acid is used to leach magnesium oxide in waste magnesium bricks in steps to achieve the recovery of valuable metals and the recycling of waste acid.

Metal replacement method: Add waste iron filings in proportion to the copper-containing leaching solution, and recover metal elements such as copper through metal replacement reaction. This method has the advantages of simple operation and high efficiency.

2. Physical treatment method

Screening, magnetic separation, etc.: Use physical methods (such as vibrating screens, magnetic separators, etc.) to screen and magnetically separate waste refractory bricks to obtain materials with different particle sizes and compositions to meet the needs of different fields.

III. Key technology research and process optimization

1. Process optimization

Process design: According to the characteristics and needs of waste refractory bricks, design appropriate processing processes, including crushing, pulverizing, screening, magnetic separation, etc., to ensure that the processing process is efficient and environmentally friendly.

Equipment and parameter selection: Select appropriate processing equipment and process parameters, such as the type, speed, and pressure of crushers and pulverizers, to ensure the uniformity and stability of particle size.

2. Improvement of recycled product performance

Additive regulation: In the production process of recycled products, by adding appropriate amounts of stabilizers, crystallization control agents, fillers, expanders and other additives, the microstructure and crystal organization of the products are regulated to improve their refractory performance, thermal conductivity and durability.

3. Process parameter control: Precisely control process parameters such as sintering temperature, sintering time, pressing pressure, etc. to obtain recycled products with excellent performance.

4. Application fields

Refractory brick materials treated by recycling and resource utilization technology are widely used in many fields such as construction, roads, gardens, environmental protection, education, scientific research and art. For example, in the field of construction, they can be used as aggregates to produce lightweight concrete, blocks and other building materials; in road construction, they can be used as aggregates for asphalt concrete and cement concrete; in garden landscapes, they can be used to pave the ground in areas such as sidewalks and squares.

In summary, the recycling and resource utilization technology of refractory brick materials is of great significance to reducing resource waste and reducing environmental pollution. With the continuous advancement of technology and in-depth research, I believe that this field will achieve more significant results.