low grade diasporic bauxite in the jajarm mine with an a/s (al2o3/sio2) ratio of 2.3 is not usable in the bayer process at jajarm alumina complex. due to the severe interlocking effect between the diaspore and aluminosilicate minerals (chamosite and kaolinite) and iron-containing minerals in a microcrystal matrix, the thermo-chemical treatment, which is independent from micro-mineralogy, was ch...

The aim of this article was the gas chromatography–mass spectrometry (GC-MS) analysis oforganic matter from a residual liquor sample (S.C. Alum S.A., Tulcea), extracted by solid-phasemicroextraction method (SPMA) and derivatized with N-(tert-butyldimethylsilyl)-Nmethyltrifluoroacetamide(MTBSTFA) as silylating agent. [...]

*Correspondence: [email protected] 1Centre de Recerca Matemàtica, Bellaterra, Barcelona, 08193, Spain 2Mathematics Applications Consortium for Science and Industry, University of Limerick, Limerick, Ireland Full list of author information is available at the end of the article †Equal contributors Abstract A soft sensor for measuring product quality in the Bayer process has been developed. The sof...

Black liquor is the residue from the kraft paper pulp process and consists, mainly, of water, lignin, organic residues from cellulose and hemicelluloses and inorganic matter (mostly sodium, potassium and sulfur). Before any combustion or gasification, the dry content of the black liquor is increased, typically from 14-18% to 75-80%, to permit autogenous combustion and high conversion efficiency...

Lignin is possibly one new product from the paper pulp mill. Lignin of relatively high purity can be separated from black liquor by using the so called “LignoBoost” process. The first step of the LignoBoost process is the precipitation of lignin by lowering black liquor pH. The efficiency of this step depends on the properties of black liquor and the process conditions in the precipitation step...

There is a pressing need for Chinese liquor producers to use information systems in managing production process and improving production efficiency for meeting fiercely increasing market competition. Unlike liquor production in other countries, Chinese liquor production replies on experience and manual operations greatly, which has very low-level automation and informatization. This paper takes...