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A new polymer alloy has been developed by blending powder of UHMWPE and graphite into nitrile rubber for marine stern tube bearings. It has good self-lubrication performance, which decreases the friction coefficient under low speed conditions and the critical speed at which bearing vibration and noise occur. Experimental investigations have been completed to examine its physical properties, integrated...
Calcification roasting followed by acid leaching was an effective and environment-friendly way to extract vanadium from vanadium slag. Kinetics study of leaching calcification roasted vanadium slag with sulfuric acid was critical to increase vanadium extraction. Maximum leaching ratio of 93% was obtained in optimal condition of 15% sulfuric acid as leaching agent with particle size smaller than 75μm...
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