A kind of composite bone charcoal powder and its preparation method and application

Abstract

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. The preparation method of the composite bone charcoal powder comprises the following steps: (1) collecting miscellaneous bones, removing impurities, and pulverizing the miscellaneous bones , and then mixed with biomass materials and fly ash to obtain mixed powder, and then sent to the bone charcoal furnace for initial burning; (2) Take out the mixed powder after initial burning, add alkaline solution, filter and wash with water after standing , and then dry the mixed powder; (3) secondary calcination, the mixed powder is placed in a bone charcoal furnace, and calcined under the protection of nitrogen; (4) the carbonized material formed after the calcination is taken out, soaked, activated , pickling, pH adjustment and drying to obtain the composite bone charcoal powder; the present invention mixes biomass material and fly ash in the initial calcination process, which reduces the difficulty of calcination treatment of miscellaneous bones and improves the calcination of miscellaneous bones. The uniformity of specific surface area after becoming 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 in the first 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 s...

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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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