Basic research on application of green dust suppression materials in mines

Dust suppressant is an important way to improve the efficiency of wet dust removal，but the dust suppressant currently used in mine is generally chemical dust suppressant，which faces challenging problems of low interfacial activity, high cost， poor degradation，as well as environmental pollution and other issues. To synthesis biological dust suppressant (BDS), a new idea of microbial fermentation technology is proposed. Response surface optimization method was used to explore optimal fermentation conditions. These results show that BDS can be produced to the maximum capacity under the conditions of temperature =37.56℃, pH =7.99, rotating speed =220 r/min, inoculant =2.17%, and liquid loading =59.89 ml.XRD, FTIR and HPLC-MS/MS were adopted to explore the structural features of BDS. Its molecular structure shows a cyclic lipopeptide. The wettability was tested with interface rheometer and we found its good wetting ability under the concentration of 0.06wt‰ compared with chemical dust suppressant. At the same time, dust reduction performance was studied with self-developed test system and BDS showed good performance in dust reduction efficiency. Its application prospects are broad, which may open a new situation for green and efficient control of mine dust.