OPTIMIZATION OF DISSOLUTION OF COLEMANITE ORE IN POTASSIUM DIHYDROGEN PHOSPHATE SOLUTION (KH2PO4)

Year 2017, , 402 - 409, 30.06.2017

Ozlem Karagoz Soner Kuslu

https://doi.org/10.17261/Pressacademia.2017.617

Abstract

Boron is one
of the most important richnesses of Turkey 
which has approximately 72% of the known boron reserves globally. The
production of boron compounds has essentially expanded recently due to
increasing demands.  Colemanite rich in
boron is a common raw material to produce boron components and the first step
of this process is the dissolution of colemanite by using different leaching solutions.
The main aim of the study is to investigate the optimization of dissolution of
colemanite in potassium dihydrogen phosphate (KH₂PO₄) solution. Taguchi method was used to
determine the optimum conditions while effectiveness of the parameters were identified
by variance analysis. Reaction temperature (T), KH₂PO₄
concentration (C), stirring speed (W), solid to liquid ratio (S/L), and
particle size (D) of colemanite were selected as parameters affecting the rate
of colemanite dissolution. The optimum conditions for these parameters were
determined. As a result of the experiment made under optimum conditions, both
98% of B₂O₃ passed into the solution and potassium borate
by-product were produced by crystallization.

 

Keywords

Colemanite, optimization, potassium dihydrogen phosphate, taguchi method

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