1. Product characteristics

Alumina is produced by processing bauxite ore. After crushing and grinding the ore to less than 1mm it is

then subjected to high temperature and pressure after the addition of concentrated sodium hydroxide. The

alumina dissolves in the highly caustic liquor and of the many impurities only silica is soluble.

After digestion the sand particles are removed with the slurry being settled in primary thickeners where the

flocculant is added. This is a critical stage in achieving very clear overflow clarities. The underflow, or red

mud, then passes to a counter current decantation process where further alumina from the liquor is

recovered via a series of washer decanters. Again flocculant is used here to promote settling and

acceptable overflow clarities.

The pregnant liquor from the primary thickeners is filtered, then cooled (taking up to 48 hours) and seeded

with alumina hydrate to promote precipitation of alumina trihydrate. This is then filtered and washed finally

calcined to produce alumina.

2. Quality index

Appearance

Solid content

(%)

Hydrolysis

degree (%)

Molecular weight

(million)

Residual monomer

content (%)

Dissolution

time(hr)

SHFLOC

A20**

≥89

6-45

(ADJUSTABLE)

5-25

(ADJUSTABLE)

≤0.05

≤1

3. Instruction for use

(1)It's very important to make the efficient dispersion during using, otherwise will cause agglomerate

and "fish eyes", dissolving time will be longer.

(2)Low-hardness water for use; avoid adopting such tank or pool, which will influence on water quality.

(3)Improve the water temperature to accelerate the dissolving velocity, but not exceed 50.

(4)Stirring will accelerate dissolving, but tough stirring will make the dispersant chain broken and

degradation. Shipshape agitator with 200 - 500 rpm is the best choice.

(5)Commonly mix the product into 0.05%--0.5%(w/w)solution as reserve.

(6)Adjust the optimum dosage of product according to application condition.

4. Product package

25 Kg paper plastic three-in-one compound woven bags, or according to users’ requirement; Its shelf life

is 2 years.

5. Attention

The product is moisture absorbent, thus to protect from damp and moist for conservation. It should be

stored in a dry and ventilate storehouse, and not be exposed to air and sunshine.aa