Lignite cleaning in NaCl solutions by the reverse flotation technique

• Autorzy: Zhang H. , Liu Q.

Identyfikatory

DOI

10.5277/ppmp150227

• Języki publikacji: EN

Abstrakty

EN

A cleaning possibility of low (BD) and high ash content (IM) lignites in NaCl solutions using a reverse flotation technique was studied. Preliminary test results indicated that BD lignite cannot be cleaned effectively in the traditional manner because gangue was floated first rather than a combustible material. Further studies indicated that the lignite cleaning in NaCl solutions using the reverse flotation technique is possible. However, a large quantity of dodecyl amine hydrochloride (DAH) was required. A lower ash content in a concentrate can be obtained by addition of NaCl. A concentrate yield can be im-proved by addition of starch. Under the test conditions, for BD lignite with the ash content in the feed 15.19%, the ash content in the concentrate 11.44% and the concentrate yield 67.38% were obtained. Similarly, for IM lignite with the ash content in the feed 57.40%, the ash content in the concentrate 32.90% and the concentrate yield 25.08% were obtained. The flotation rate constant k and maximum ash recovery ε∞ significantly increased with the NaCl concentration.

Słowa kluczowe

EN

lignite; reverse flotation; NaCl; kinetics; coal preparation

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2015
• Tom: Vol. 51, iss. 2
• Strony: 695--706
• Opis fizyczny: Bibliogr. 34 poz., rys., tab.

Twórcy

autor

Zhang H.

• National Engineering Research Center for Coal Processing and Purification, China University of Mining and Technology, Xuzhou 221116, China

autor

Liu Q.

• Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou 221116, China
• Departmentof Chemical and Materials Engineering, University of Ualberta, Edmonton T6G 2R3, Canada

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