Composite bone charcoal powder as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of production of bone charcoal powder and particularly relates to composite bone charcoal powder as well as a preparation method and application thereof. The preparation method of the composite bone charcoal powder comprises the following steps: (1) collecting collected bones and removing impurities; crushing the collected bones, and then blending witha biomass material and fly ash and treating to obtain mixed powder; then conveying the mixed powder into a bone charcoal furnace and carrying out primary calcining; (2) taking out the mixed powder subjected to the primary calcining; adding an alkaline solution; after carrying out standing treatment, filtering and washing with water; then carrying out drying treatment on the mixed powder; (3) carrying out secondary calcining; putting the mixed powder into the bone charcoal furnace and carrying out calcining treatment under the protection of nitrogen gas; (4) taking out a carbonized material formed by calcining; and carrying out immersion, activation, acid washing, pH (Potential of Hydrogen) value regulation and drying on the carbonized material to obtain the composite bone charcoal powder.According to the preparation method provided by the invention, the biomass material and the fly ash are blended in a primary calcining treatment process, so that the calcining treatment difficulty ofthe collected bones is reduced, and the uniformity of the specific surface area is improved after the collected bones are calcined into the bone charcoal powder.

Description

technical field [0001] The invention belongs to the technical field of bone charcoal powder production, in particular to a composite bone charcoal powder and its preparation method and application. Background technique [0002] Bone char is a kind of amorphous carbon, which contains 7% to 11% carbon, about 80% calcium phosphate and other inorganic salts. It is produced by carbonization process. Bone charcoal has the main physical and chemical properties generally used as an adsorbent, and its specific surface area is only about 400m 2 / g, compared to the specific surface area of ​​activated carbon is generally 1000m 2 / g, the difference is large, but the bone char structure contains this complex and rich inorganic composition and structure, as an adsorbent, it has both non-polar adsorbents (such as activated carbon) and polar adsorbents (such as zeolite). ), so it has a wide range of applications in many fields. [0003] Based on previous research by those skilled in the...

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Problems solved by technology

[0003] Based on previous research by those skilled in the art, generally, the specific surface area of ​​bovine bone charcoal is 77.67-239.63m 2 / g, the specific surface area of ​​sheep bone charcoal is 83.98~413.8m 2 / g, the specific surface area of ​​chicken bone charcoal is 130.2~140.43m 2 / g, that is to say, the specific surface of different livestock bones is quite different, and bone charcoal processing enterprises generally collect miscellaneous bones. Therefore, when the collected miscellaneous bones are directly used, it is easy to cause bone charcoal powder produced. The difference in specific surface area is large, which cannot meet the needs of market applications; in addition, when the existing bone charcoal powder is used as an adsorbent in the sewage field, the effect of taking into account non-polar adsorbents is still poor

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