By improving the casting process, as shown in Fig. 3, the temperature field in the solidification process of the cast ball is changed to eliminate the defects. The improvement scheme is as follows: raising the riser, the diameter is 67.94 mm, the height is 30 mm, and the feeding capacity of the casting is increased […]
Grinding Media Balls, mill balls for ball mill, including casting balls and forged steel balls, tell you the difference and how to select.
Liang Bing—Li Ye Gen (Mechanical and Electrical RepairFactory，Jinduicheng Molybdenum Group Co., Ltd, Huaxian714102, Shaanxi, China) Abstract：The solidification process of the wear-resistant cast baIls made by metal mold was simulated using the software of temperature field numerical simulation. Based on the study of the cast ball solidification process’s temperature distribution law by improving the casting process, […]
Abstract: To solve the problem of the blowhole defects in the center and on the high chromium cast iron grinding ball’s surface, the influence of the two filling modes—one-ball mold and four-ball mold on blowhole defects were analyzed. The result indicated that the four-ball m old’s venting effect with parting—line gating system is better. The impact […]
According to the hardness value and the impact toughness data, the hardness trend charts are drawn: 1; the impact toughness trend Charts as follows: Fig. 2.
Abstract：The effects of chemical composition and heat treatment on properties of the wear-resistant grinding balls were studied through hardness and impelling strength test, metallographic structure analysis. The study used an orthogonal test instead of a fixed variable method for a shorter experimental cost and time. The experimental results show that the wear-resistant grinding balls show […]
3.1 Matrix structure (1) Carbide and Martensite The microstructure of the chromium grinding balls are mainly carbide, and the carbide of high hardness in white cast iron is Fe3C, Cr3C, (Fe, CR)3C, Cr7C3, Cr22C6, WC, TiC, etc. , therefore, the size, number, distribution, shape of the grinding ball has a direct impact on the performance.
ZHANG Zhou1，LUO You-gen2，YING Gen-peng3 （1.Hangzhou Xuelin Science- Technology Development Service, Hangzhou 310012, China; 2. Longyou Hengshan Steel Ball Factory, Longyou 324406, China; 3. Hangzhou Aobao Chemical Co. Ltd., Hangzhou 310012, China） Abstract：A brief introduction was made to the chemical compositions, matrix structure, mechanical properties, and melting process of chromium series cast iron grinding balls. The […]
2.1 High and low chrome balls contrast The production practice shows that the strength and wear resistance of the low chrome grinding balls are low and easy to be broken, which makes the broken ball rate and the out-of-round rate higher and has a particular influence on the grinding effect. The surface of high chrome […]
Abstract: To solve the problem that the ball unit consumption is too high and the particle size of grinding products shifts to coarse size after the reformation of the grinding system and the optimization of the ball diameter ratio in a molybdenum concentrator. The comparison of chemical composition and mechanical properties between High Chrome Grinding […]
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