Destoning the Moatize Coal Seam, Mozambique, by Dry Jigging

Minerals

卷:10

JosepOliva Moncunill¹  CarlosHoffmann Sampaio¹  LuisFelipe Silva Oliveira²  Bogdan Cazacliu³  DavidSelemane José⁴  EunírioZanetti Fernandes⁵  GersonLuis Miltzarek⁶  CarlosOtávio Petter⁶  IrineuAntônio Schadach de Brum⁶  WesleiMonteiro Ambrós⁶ 

[1] Departament d’Enginyeria Minera, Industrial i TIC (EMIT), Escola Politècnica Superior d’Enginyeria de Manresa (EPSEM), Universitat Politècnica de Catalunya (UPC), Av. Bases de Manresa 61–63, 08242 Manresa, Spain;

[2] Department of Civil and Environmental, Universidad de la Costa, CUC, Calle 5855e66, Barranquilla 080002, Atlántico, Colombia;

[3] Gustave Eiffel University, Aggregates and Materials Processing Laboratory, Route de Bouaye-CS4, CEDEX 44344 Bouguenais, Nantes, France;

[4] Instituto Supeior Politécnico de Tete, km 1, EN7 Matundo, Tete, Mozambique;

[5] Instituto Tecnológico Vale (ITV), Av. Juscelino Kubitscheck, Ouro Preto 35400-000, MG, Brazil;

[6] Mineral Processing Laboratory, Federal University of Rio Grande do Sul, 9500 Bento Gonçalves Avenue, Porto Alegre 91501-970, Brazil;

关键词: air jig;    destoning;    waste separation;    Moatize coal;   

DOI  :  10.3390/min10090771

来源: DOAJ

【 摘 要 】

This paper proposes pre-beneficiation studies by air jigs of the coal layers from a Moatize coal deposit. Pre-beneficiation, also called destoning, removes tailings before the beneficiation plant. The air jigs operate in the same granulometric size range as the heavy-media cyclones (HMCs) that are installed in the preparation plant. With the destoning, the heavy-media circuit operates with a lower coal feed and higher organic matter contents, increasing its cutting efficiency and lowering operational costs. The use of air jigs reduces the total water consumption in the plant, which is especially important for the region where the plant is installed, as water is particularly scarce. Four coal layers of the Moatize coal deposit were studied, which are currently exploited in the mine. As main results of the study, it is possible to say that the concentration of lights (feed of the preparation plant) and heavies (waste fraction) in air jigs can be carried out with reasonable efficiencies for all coal layers studied, making air jigs a feasible option for coal destoning.

【 授权许可】

Unknown