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What should I pay attention to when grinding a solid with a mortar?

Aug 22,2022

Grinding operations should be noted: ① according to the nature of the solid to be ground and the degree of coarseness of the product to choose different materials of the mortar. In general, use porcelain or glass mortar, iron mortar for grinding hard solids, and agate or alumina mortar for grinding fewer specimens very carefully. Note that the agate mortar is expensive and should be used with special care, not to grind excessively hard substances and not to contact with hydrofluoric acid. ② When performing grinding operations, the mortar should be placed on an object that does not slide easily, and the mortar and pestle should be kept vertical. Large solids should only be crushed, not pounded with the mortar and pestle, otherwise the mortar and pestle will be damaged or the solids will be spilled. Explosive substances can only be gently crushed, not grind. Grinding corrosive substances on the skin, should be covered with a thick piece of paper or plastic sheet on the mortar, and then open a hole in its center, insert the mortar and pestle before grinding, the amount of solid in the mortar shall not exceed its volume of 1/3. ③ mortar can not be heated, especially agate products, do not put into the electric oven to dry. ④ wash the mortar, should first rinse with water, acid corrosion resistant mortar can be washed with dilute hydrochloric acid. When the bowl is attached to difficult to wash the material, can be put into it a small amount of salt, grinding and then washing.

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