Novel shell calcium oxide produced by microwave

Abstract

The invention discloses a novel shell calcium oxide produced by microwave. The raw materials of the shell calcium oxide are one or more of an oyster shell, a scallo, a pearly shell or a fan shell. The production method comprises the following steps: adding sand and water into the shell raw material in arbitrary proportion, mixing and performing abrasive cleaning, drying and smashing till the grain diameter of 0.5-3cm; and performing microwave drying through three stages, wherein the microwave intensities are in turn 100 kilowatt, 200 kilowatt and 250 kilowatt, the microwave temperatures are in turn 600 DEG C, 1200 DEG C and 1400 DEG C, and the baking times are in turn 1h, 3h and 2h; performing high micro-grinding on the dried materials till the grain diameter is 4-30 um to obtain the product. The novel microwave produced shell calcium oxide is simple in manufacture process, environmentally friendly and energy-saving, short in burning time, high in production efficiency, high in product purity and good in quality, avoids the contact with the other fuels such as coal, reduces the residues of the heavy metal and the sulfide in the product, is widely used for food adding and subsidiary agricultural product washing, and can effectively remove the pesticide residue on the surface of the subsidiary agricultural product.

Description

technical field [0001] The invention relates to calcium oxide, in particular to a novel shell calcium oxide produced by microwaves. Background technique [0002] Calcium oxide is usually obtained from limestone or shells, and the material containing calcium carbonate is heated to 500-600°C to decompose it into calcium oxide and carbon dioxide; most of the existing calcium oxide preparations use coal and other fuels to sinter the shells, so that the shells The residual components of heavy metals and sulfides are high, which cannot meet the requirements of its use in food drying and other aspects; the existing preparation method of calcium oxide has long burning time, high energy consumption and is not environmentally friendly, low production efficiency and low product purity, so it is urgently needed Improve it. Contents of the invention [0003] The object of the present invention is to provide a novel microwave-produced shell calcium oxide, to solve the problems raised i...

AI Technical Summary

Problems solved by technology

[0002] Calcium oxide is usually obtained from limestone or shells, and the material containing calcium carbonate is heated to 500-600°C to decompose it into calcium oxide and carbon dioxide; most of the existing calcium oxide is prepared by sintering shells with fuel such as coal, so that the shells The residual components of heavy metals and sulfides are high, which cannot meet the requirements of its use in food drying and other aspects; the existing preparation method of calcium oxide has long burning time, high energy consumption and is not environmentally friendly, low production efficiency and low product purity, so it is urgently needed improve it