Purchasing refractory bricks is a complex and critical task, which is directly related to the operating efficiency and life of high-temperature industrial equipment. This article will introduce the refractory brick purchasing guide in detail, including pre-purchase preparations, supplier selection, quality inspection and acceptance, precautions and other aspects.

1. Pre-purchase preparations
1. Understand the needs
Before purchasing refractory bricks, you must first clarify the actual needs, including the use environment, temperature requirements, chemical properties, etc. These factors directly affect the selection of refractory bricks.

Use environment: Understand the specific use scenarios of refractory bricks, such as metallurgical furnaces, glass kilns, cement kilns, etc.
Temperature requirements: Clarify the maximum operating temperature and continuous operating temperature of the equipment.
Chemical properties: Understand whether there are corrosive media such as acids, alkalis, and salts in the use environment.
2. Make a procurement plan
Make a detailed procurement plan based on the needs, including procurement quantity, budget, time schedule, etc. Ensure that the plan is reasonable, the budget is sufficient, and reserve a certain margin to deal with emergencies.

2. Select suppliers
1. Evaluate supplier qualifications
Choosing suppliers with complete qualifications and good reputation is an important part of ensuring product quality.

Qualification certificate: Check whether the supplier has relevant production licenses, quality management system certification (such as ISO9001) and other qualifications.
Corporate reputation: Understand the reputation and reputation of suppliers through the Internet, customer reviews and other channels.
2. Supplier inspection
Conduct on-site inspections of potential suppliers to understand their production capacity and technical level.

Production capacity: Investigate the supplier's production equipment, process flow, production scale, etc.
Technical level: Understand the supplier's R&D capabilities, technological innovation, etc.
3. Sample testing
Request samples from suppliers and conduct rigorous tests to verify whether the quality of the products meets the requirements.

Performance testing: Perform performance tests such as refractoriness, compressive strength, and thermal shock stability on samples.
Chemical analysis: Perform component analysis on samples to ensure that they meet the chemical requirements of the use environment.
III. Quality inspection and acceptance
1. Quality inspection standards
Specify the quality inspection standards and acceptance procedures in the procurement contract to ensure the quality of supply.

Inspection standards: refer to national or industry standards, such as GB/T 2988-2012 "Refractory Bricks" and ISO 10081 "Classification of Refractory Materials".
Acceptance procedures: specify detailed acceptance procedures, including sample extraction, test methods, qualified standards, etc.
2. Incoming inspection
Strict incoming inspection of incoming refractory bricks to ensure that their quality meets the requirements.

Appearance inspection: Check the size, shape, surface quality, etc. of refractory bricks.
Performance testing: Sampling tests are conducted on incoming batches to test their refractoriness, compressive strength and other properties.
Chemical analysis: Chemical composition analysis of samples is conducted to ensure that their composition meets the requirements.
3. Acceptance records
Record the acceptance process in detail, including inspection results, existing problems, treatment measures, etc., for subsequent traceability.

IV. Matters needing attention
1. Contract terms
When signing a purchase contract, it is necessary to clarify various terms, especially quality standards, delivery time, acceptance standards, after-sales service, etc.

Quality standards: Clarify the performance indicators and testing standards of the product.
Delivery time: specify the specific delivery time and delivery batch.
Acceptance criteria: specify the acceptance procedures and criteria in detail to ensure the quality of supply.
After-sales service: clarify the after-sales service content and response time.
2. Transportation and storage
Pay attention to the protection of refractory bricks during transportation and storage to avoid damage and moisture.

Transportation: Choose a suitable transportation method to ensure that the refractory bricks are not damaged during transportation. For fragile refractory bricks, protective measures should be taken.
Storage: Store refractory bricks in a dry and ventilated warehouse to avoid moisture and damage. Different types of refractory bricks should be stored in categories for easy management and use.
3. After-sales service
Choose a supplier who provides good after-sales service to ensure that problems encountered during use can be solved in time.

Technical support: The supplier should provide professional technical support to assist in solving technical problems in use.
Quality assurance: clarify the warranty period and warranty scope of the product to ensure that quality problems can be dealt with in time during the warranty period.
Training service: The supplier should provide necessary use and maintenance training to improve the operating level of the user unit.
Conclusion
Purchasing refractory bricks is a highly technical and demanding job that requires adequate preparation and meticulous operation. From demand analysis, supplier selection, sample testing, to quality inspection and acceptance, every link is crucial. Through a scientific and reasonable procurement process, we can ensure that high-quality refractory bricks are purchased, thereby ensuring the safe and efficient operation of high-temperature equipment.