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Is Crushing A Mineral Into Powder A Physical Change

topic 3: ore processing and metal recovery,mineral processing and metallurgical extraction:these are the two activities of the mining industry that follow its first principal activity, mining, that liberates the orebody from the ground:mineral processing (or beneficiation or ore-dressing) aims to physically separate and concentrate the ore mineral(s) from the ore-rock..metallurgist & mineral processing engineer,each mineral processing plant is different: with varied ore types, mining equipment, and management (operating) philosophy. the evaluation and prioritisation of variables that affect the plant performance is the primary function. implementing changes within the.classify the following changes as physical or chemical:,chemical, sunlight and nutrients from soil are transformed into grass (g) an infant gains 10 pounds. chemical, ingested food is converted to bone, fat, tissue, etc. (h) rock is crushed into powder. physical, it’s still rock with the same chemical identity – just divided into smaller particles..streak (mineralogy) - wikipedia,because the trail left behind results from the mineral being crushed into powder, a streak can only be made of minerals softer than the streak plate, around 7 on the mohs scale of mineral hardness. for harder minerals, the color of the powder can be determined by filing or crushing with a hammer a small sample, which is then usually rubbed on a streak plate..

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