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The continuous development of technology in the refractory fused magnesia aluminum industry requires higher

2021-08-19 02:12:41
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Selection and arrangement of fused magnesium-aluminum multi-grain material screening equipment The commonly used screening equipment in the production of refractory materials is a two-layer screen or a three-layer screen. High-quality mid-grade magnesia can be arranged in parallel or vertically as described above. However, with the continuous development of technology in the refractory industry, the requirements for refractory materials have increased. In actual production, more granular ingredients must be used to improve the physical and chemical indicators of the product, which requires the application of four or more layers of sieves. sub-equipment. Production practice has proved that if the four-layer screen is arranged in one piece, the screening efficiency will be low. For this reason, two double-layer screens can be arranged in series, and the screening efficiency of this split structure can be greatly improved. Several improvements in process equipment installation design. In the design of the crushing system, the cone crusher and the double-roller crusher are usually used as a combined unit in order to increase the output of the unit. , its adding structure is to set a gate to control the material flow in the straight section of the chute before the sieve is fed into the twin rollers. This structure not only aggravates the manual operation in front of the machine, it is not easy to adjust the feeding amount, but also easily causes dust leakage due to poor sealing performance. For this reason, an intermediate buffer trough with a capacity is added to the sieve material return system, and then the feeder is used to feed the material. Then the above problems are better solved. Utilize the material's own padding effect to reduce wear and noise. The structure type of the feed port of the double-roll crusher takes the 610mmx40mm double-roll crusher as an example, and the type of the feed port is improved. The diameter of the improved flange becomes smaller, and the surrounding space above the flange can store part of the material. At the same time, the material can fall on the double-roller gap to a greater extent and less scattered on the fast-rotating rollers, thus reducing the material alignment method. Lan wear and reduce noise. In order to reduce the wear and tear of the material on the equipment foundation, the discharge structure of the double-roller crusher is improved. The discharge structure of other crushers can also be improved accordingly.




Fused magnesia-aluminum spinel




Magnesium refractory materials are divided into magnesia refractory raw materials and magnesia refractory products. Fused white corundum products are mainly used in high-temperature industrial production processes such as metallurgy, building materials, non-ferrous metals, chemicals, machinery, and electric power, and are an indispensable and important foundation for high-temperature industries. Material. A few days ago, the Liaoning Provincial Bureau of Quality Supervision conducted a special supervision and spot check on the province's magnesia refractory materials.


This time, a total of 112 batches of magnesia refractory products produced by 89 enterprises in 5 regions including Anshan, Yingkou, Dalian, Jinzhou and Panjin were inspected. 105 batches of products were qualified, and the product sampling qualification rate was 93.8%. Among them, 85 batches of products from 75 manufacturers of magnesia refractory raw materials were supervised and spot checked, and the product sampling rate was qualified; 27 batches of products from 17 manufacturers of magnesia refractory products were supervised and spot checked, 10 enterprises produced 20 batches of products passed the spot check, and the product sampling pass rate was 74.1%.


Random inspection of magnesia refractory products The main unqualified items of magnesia (aluminum) bricks are apparent porosity, bulk density, load softening start temperature, permanent heating line change, thermal shock resistance; the main unqualified items of magnesia-chrome bricks It is the apparent porosity; the main unqualified items of magnesia-calcium bricks are the apparent porosity, bulk density, and load softening start temperature.


In response to the quality problems reflected in this provincial special supervision and spot check of product quality, Liaoning Provincial Bureau of Quality Supervision requires all relevant units to strictly follow the "Product Quality Law of the People's Republic of China", "Administrative Measures for Product Quality Supervision and Spot Check" and other laws and regulations. It is stipulated that practical and effective measures should be taken to do a good job in the post-processing work of product quality supervision and random inspection of substandard product manufacturers to ensure product quality.


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