Xingnong tells you that the macroscopic peeling off of the ball mill lining will also cause its failure.

Macroscopic spalling is the appearance of pits visible to the naked eye on the working surface of the ball mill liner, which generally originates from fatigue cracks in the workpiece of the ball mill liner. These macro-cracks usually nucleate on the brittle phase, ball mill liner casting defects (shrinkage, pores, inclusions), and expand after being impacted by abrasives, etc. during operation. The difference between macroscopic spalling and microscopic spalling is that the cracks are not generated on the surface, but are nucleated in deeper parts and expand to the inside along the brittle phase and defects, forming a large range of deep cracks. After the cracks converge to the surface , will cause the entire ball mill liner workpiece to break. In order to explore the occurrence and development rules of spalling, the contact fatigue damage test was conducted by simulating the contact state of the ball mill lining plate. The test was carried out using a type testing machine. During the test, the contact surface of the specimen was placed in a sliding and rolling contact state. The test piece is a carburized and quenched ball mill lining plate (as shown in the picture). There is no hardened layer on the side of the test piece. The surface hardness of all ball mill lining test pieces is in the range of ~, with four different hardened layer thicknesses (see table). And the upper and lower test pieces The thickness of the hardened layer is the same, the relative curvature radius is / and / for the upper and lower specimen speeds respectively, the sliding rate is and respectively, and the specimen with narrow contact width is used as the upper specimen with low rotation speed. In this way, due to the edge effect of the specimen, the upper specimen The test piece became the subject of fatigue spalling. Internal combustion engine pressurized oil was used for injection lubrication, and the operating temperature was maintained at about ℃.
Under abrasive wear conditions, if there are brittle hard phases such as carbides in the workpiece material of the ball mill liner, During operation, when the surrounding softer tissue is worn away and loses its protective effect, these carbides will be exposed, break under the cutting and impact of the abrasive, and fall off the surface, causing metal loss.
Mining machinery manufacturer Xingnong Machinery pays attention to product quality, relies on technological innovation, optimizes product structure, enhances core competitiveness, and continuously expands business fields. It has always been at the forefront of science and technology in the world. In our opinion, we must make the equipment refined and detailed. To be more professional, we must work hard on the quality, quality and service of various equipment accessories, so that we can gain a good brand and good reputation and win praise from users. High-quality products include ball mill accessories, steel balls, Mill lining plate, ball mill ring gear, dryer accessories, dryer ring gear, rotary kiln accessories, crusher accessories, hammer head, plate hammer, classifier accessories and other mineral processing equipment accessories. There are hundreds of specifications and varieties, wide range It is used in mining, metallurgy, building materials, electric power, refractory materials, chemical industry and other industries. It has users in more than ten provinces, municipalities and autonomous regions across the country, and exported to many countries, winning praise from users.
Gongyi Xingnong Machinery Manufacturing Co., Ltd. is a leading manufacturer and supplier of mineral processing equipment in China. We specialize in the production and operation of high-quality mineral processing equipment, crushing equipment, rotary kiln equipment and dryer equipment. The main products of mineral processing equipment include ball mills, energy-saving ball mills, cone ball mills, overflow mills, etc. Flow ball mill, grid ball mill, cement ball mill, baseball mill, crusher, jaw crusher, compound crusher, impact crusher, new crusher, dryer, new dryer, slime dryer, Fly ash dryer, lignite dryer, desulfurization gypsum dryer, Mongolian coal dryer, ore washing machine, spiral ore washing machine, classifier, flotation machine, magnetic separator, etc. Rotary kiln equipment includes, Carbon rotary kiln, ceramsite sand rotary kiln, limonite rotary kiln, hematite rotary kiln, kaolin rotary kiln, cement rotary kiln, reduced iron rotary kiln. These products are widely used in mining, metallurgy, electric power, highways, railways , water conservancy, building materials and other fields.
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