determination of reactive silica in bauxite
Bauxite
(silica) present in the bauxite causes caustic soda loss in the Bayer process. The part of total silica which reacts with caustic soda and forms sodalite complex through sodium silicate route is termed as Reactive Silica. Thus, the non-reacting component of total silica with caustic soda is also known as Non-Reactive Silica.
Read more...(PDF) Reduction of Reactive Silica from Bauxite ...
2.3. Determination of Available Alumina and Reactive Silica The method for the determination of available alumina (the amount to be refined to obtain Al2O3 in the Bayer process) and reactive silica (kaolinite), consisted of bauxite digestion in alkaline medium (NaOH) under controlled pressure and temperature, simulating the Bayer process [7].
Read more...Optimization of the reactive silica quantification method ...
May 10, 2017· For each ton of reactive silica, 0.89 tons of NaOH is lost due to the formation of sodalite. Processing bauxite with 7% reactive silica requires 0.133 Mtpa more NaOH than processing bauxite with 5% reactive silica, which is equivalent to $60 million per year at a NaOH cost of U$450 per ton.
Read more...how to make alumina from bauxite
Bauxite is a high-aluminum-content rock. That is the main ore that aluminium is mined from. One of the most common elements on earth is bauxite. It contains almost 25 percent-30% alumina. In the belt around the equator, bauxite is commonly found. The primary aluminium bearing ore with an aluminium content of more than 35 to 40 percent is bauxite.
Read more...Imputation of reactive silica and available alumina in ...
The processing of bauxite is a key step in the production of aluminum, in which the determination of Reactive Silica (RxSiO 2) and Available Alumina (AvAl 2 O 3) are very relevant. The traditional analytical method for achieving RxSiO 2 has limitations associated …
Read more...Inducement of Rapid analysis for Determination of Reactive ...
total silica and reactive silica by treating bauxite with sodium carbonate followed by extraction and spectrophotomtetry. The sample preparation for determination of AA by standard procedure is ...
Read more...IS 2000-1 (1985): Methods of chemical analysis of bauxite ...
1962*. This part covers determination on loss of ignition. The other parts are: Part 2 Determination of silica ( as SiOa, 0.5 to 10.0 percent ) Part 3 Determination of alumina Part 4 Determination of ferric oxide Part 5 Determination of titania ( 0.5 to 12.0 percent )
Read more...Inducement of Rapid analysis for Determination of Reactive ...
It was observed that developed method permits determination of reactive silica (SiO2 reactive) in bauxite and laterite containing total silica (SiO2 total) ranging from 0.50 …
Read more...Inducement of Rapid analysis for Determination of Reactive ...
It was observed that developed method permits determination of reactive silica (SiO2 reactive) in bauxite and laterite containing total silica (SiO2 total) ranging from 0.50 – 25 % maximum and ...
Read more...determination of reactive silica in bauxite
Determination of Available Alumina and Reactive Silica The method for the determination of available alumina (the amount to be refined to obtain Al2O3 in the Bayer process) and reactive silica (kaolinite), consisted of bauxite digestion in alkaline medium (NaOH) under controlled pressure and temperature, simulating the Bayer process [7].
Read more...THRESHOLD VALUE OF BAUXITE - IBM
• Contents of Reactive Silica plays an important role to define Bauxite. • Determination of Reactive Silica cant not be carried out in ROM stage rather calculated during digestion stage with Caustic Soda. • 5% of R.Silica is equivalent to 6.7% of Total Silica, which may go up to to 7-8%
Read more...IS 2000-2 (1985): Methods of chemical analysis of bauxite ...
CHEMICAL ANALYSIS OF BAUXITE PART 2 DETERMINATION OF SILICA ( First Revision ) 0. FOREWORD 0.1 This Indian Standard ( Part 2 ) ( First Revision ) was adppted by the Indian Standards Institution on 24 December 1985, after the draft ... 0.3 In this revision determination of non-reactive and reactive silica have been deleted. Gravimetric method ...
Read more...HINDALCO INDUSTRIES LIMITED SAMRI MINES DIVISION
Contents of Reactive Silica plays an important role to define Bauxite Determination of Reactive Silica cant not be carried out in ROM stage rather calculated during digestion stage with Caustic Soda. Increase product Cost. 5% of R.Silica is equivalent to 6.7% of Total Silica, which may go up to to 7-
Read more...BX03 - Reducing Reactive Silica Content in Washed Bauxite
Keywords: Bauxite, reactive silica, washing, additives. 1. Background As with most mineral resources, bauxite quality is generally deteriorating over time. The relative value of these deposits depends largely upon the concentration of alumina and silica, as well as the mineralogy of these constituents.
Read more...Determination of Bauxite's phases by the bomb digest ...
of bauxite analyses are usually done to determine loss of ignition, and alumina, silica, iron oxide and titanium contents. But recently, the range of bauxite components considered has been extended to the contaminants, substantially influencing bauxite processing (Authier-Martin et al., 2001; UNIDO, 1985).
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