Presented By : S. K Upadhyay th Date: 7 Oct 2017ibm.nic.in/writereaddata/files... · market need, the bauxite having less than 38 % alumina (Al2O3) are not having demand in market.

Presented By : S. K Upadhyay

Date: 7th Oct 2017

Company over view

Ashapura Minechem is the flagship company of the Ashapura Group and well

known as India’s largest mine owner & exporter of Bauxite & bentonite.

The group has mining & mineral processing facilities in Gujarat & Maharashtra.

Bauxite mines of the company are located in Bhatia Kalyanpur taluka and Kuchchh

region in Gujarat & Dapoli & Shrivardhan in Maharashtra.

The group is producer of high grade & low grade bauxite, High Grade is used for own

captive plant situated at Khambhaliya & Porbandar whereas Low Grade supply to

cement industries & export to Mid east country.

Occurrence of Bauxite & Features:

Bauxite found in different part of India & basalt is parent rock of bauxite deposits:-

1. Surguja, Phutkapahar, Maikala ranges in Chhattisgarh.

2. Amarkantak, Malwa plateau deposits in Madhya pradesh.

3. Kutch Peninsula, Mewasa-Virpur, Jamnagar district of Gujarat.

4. Kolaba, Ratnagiri, udgiri, Dhangarwadi and Kolhapur district in Maharastra.

Bauxite Deposits Positive Features Negative Features

Gujarat Fairly high alumina, low

silica, low organic carbon &

low moisture content.

Small scattered pocket

deposits, mixed gibbsitic-

boehmitic hard bauxite

with significant CAO and

sulphur content at place

Maharashtra Fairly high alumina, low

silica, predominantly

gibbsite bauxite with low

level of impurities.

Small scattered with

forest cover.

Recovery of High Grade Bauxite is 5 to 10 % of ROM where as 90 to 95

% are Low Grade. High Grade bauxite are not found in all Mining Leases.

Generalized stratigraphic sequence

Age Sequence

Sub. Recent to recent Sand dunes, Ran clays and

aluminum

Lower Miocene

Gaj Beds

Argillaceous limestone

Calcareous Clay

Concretionary limestone

Calcareous grit

Conglomerate

-------- UN CONFORMITY---------

Upper Eocene Laterite with Bauxite

Pockets Super Trappeans

Lower Eocene to late cretaceous Deccan traps

Mineralogy of Bauxite

Bauxite consists chiefly of hydrated aluminium oxide, namely, gibbsitic, boehmitic, diaspore with impurities of iron hydroxide minerals and titanium oxide. Silica in bauxite is mainly found in the form of kaolinite and quartz.

The major chemical constituents i.e. Al2O3, Fe2O3, SiO2 & Cao.

Bauxite is an essential ore of alumina extraction which is one of the most important non-ferrous metals used in the modern aluminum industry.

Type of Bauxite: Metallurgical Grading of Bauxite

A. Gibbsitic Bauxite (GB) - Low Temperature Alumina Refinery

B. Boehmitic Bauxite (BB) - High Temperature Alumina Refinery

C. Diaspric Bauxite (DB) - Special HighTemperature Alumina Refinery

Type of Bauxite Based on use:

Use of calcine Bauxite:

Refractory

Road surfacing (place where needs more compressive strength)

S. No Bauxite Al2O3 Sio2 Fe2O3

1 Abrasive Grade 55% 4% 4.5%

2 Refractory Grade 55% 5% 4.5%

3 Chemical Grade 56% <4-5 %% < 2.5%

4 Metallurgical Grade 37-40 < 8% 25-30%

Ashapura Raw Bauxite

Raw Bauxite

High Grade Raw Bauxite Low Grade Raw Bauxite

Ashapura Finished Bauxite products

Ashapura Finished Bauxite products

Ashapura Products specification

Calcined

Bauxite

AshGold - 43 AshSilver - 42 AshSilver 40 Abrasive Grade

Al2O3 % 85 - 86 83 - 84 79 - 80 82 Min

Fe2O3 % 2.80 Max. 4.00 - 4.50 4.50 - 5.00 5.00 - 5.50

CaO % 1.8 Max. 2.0 Max. 2.0 - 2.2 1.2 Max

SiO2 % 5 - 6 5.50-6.50 7 - 8 5 Max

TiO2 % 4 - 5 4 - 5 4 - 5 4 - 5

BD (gm/cc) 3.15 Min. 3.15 Min. 3.15 Min.

GMRDS Bauxite Analysis Report

Kutch & Jamnagar District Bauxite:

The area of Kutch & Jamnagar bauxite availability of different grade maximum quantity of bauxite is low grade as

per GMRDS analysis report.

Threshold Value of minerals

Threshold Value of minerals "means limit prescribed by the Indian Bureau of Mines from

time to time based on the beneficability and or marketability of a mineral for a given region

and a given time, below which a mineral obtained after mining can be discarded as waste.

S.

No

Notification of 1990 Notification of 2009

Region Al2O3 SiO2 Region Al2O3 SiO2

1 Eastern Ghats

(Panchpatmali.

Sapparia, Korukunda

etc)

<35 % > 5 %

Applicable to

all regions

(i ) For

Aluminous

Laterite

20 %

(Min)

(ii) For

Bauxite

30 %

(Min)

-

Reactive

Silica 5

% (Max)

2 Western Ghats (Eg

Dhangarwadi) Inland

High level Plateux (Eg

Amarkantak,

Phutkapahar,

Lohardaga & Gumla),

Plateaux and Hillocks

(Eg. Katni deposit)

<44 % > 4.5

%

3 Coastal Plains (Eg Kutch

Deposits and other

deposits of Gujarat. < 42 %

> 4.5

%

As per previous IBM notification Threshold Values:

S. No Threshold Values

Region Al2O3 SiO2

1 All Region

Bauxite

30 %

(Min)

Reactive

Silica

5 %

(Max)

Proposed Threshold Values:

Conclusion

As per notification of Ministry of Mines, dated 16/10/2009, threshold value of bauxite :- Al2O3

is 30% (Min) & Reactive Silica 5 % (Max). Based on our past experience with consideration of

market need, the bauxite having less than 38 % alumina (Al2O3) are not having demand in

market. We utilized the raw bauxite having alumina content 35 to 37 % by blending with little

bit good quality and upgrade composite quality upto 38 %.

We presumed that in future the demand of Bauxite in Domestic as well as Export may go up to

30%. So, the TH value, we proposed should be 30% Al2O3 & reactive Silica 5% Max.

Thanking You