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WEST
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East West Bridge Group Products
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CLEARON S 900 series
Intensification of vacuum filtration of iron ore slurry using CLEARON S 954 surfactant
The intensification and stabilization of vacuum filters for dewatering of iron ore concentrates (IOC) can be effective when using chemicals - surfactants for surface modification of particles filtered in such a way that on a pile-up step a thick cake is formed, and at the drying stage -water is removed effectively from its pores.
The technology of filtering iron ore concentrates slurry with the use of a nonionic type surfactant CLEARON S 954, developed by specialists of EWB s.r.o., can substantially improve the efficiency of disk vacuum filters.
To pilot test the effectiveness of the reagent CLEARON S 954 short-term industrial tests were taken at the ore dressing factory - Northern Iron Ore Enrichment Works (Kryvyi Rih, Ukraine).
Vacuum-filter was chosen for the test. Before the test the vacuum-filter completed 158 hours.
Slurry characteristics:
- density – 1780 - 1900 g/l;
- iron mass fraction – 64,2 - 65,8%;
- disperse composition (- 53 microns): 93,2 - 95,5%.
The experiments were conducted with the following parameters:
- Pile-up and drying vacuum – 80 kPa;
- rotational speed of vacuum filter's drum: 0,3 - 0,75 min-1;
- cake moisture prior to introduction of the reagent in slurry at 0,3 rpm: 10,0 – 10,4%%.
Point of entry of reagent CLEARON S954 - into drain tray of separators at the point most remote from slurry divider to provide more time in contact with slurry.
Effect of a dose of CLEARON S 954 reagent
on cake moisture indicators:
Effect of a dose of CLEARON S 954 reagent
on specific performance of vacuum filter:
The use of surface-active substance CLEARON S 954 allowed to achieve the following results in industrial tests at the ore dressing factory No 1 of Northern Iron Ore Enrichment Works:
- to increase productivity of vacuum-filters to 100%, while reducing the cake moisture to 8,2 - 8,4%.
- to achieve maximum moisture reduction at the ore dressing factory No 1 to 7.98 -8.0%
- maximum dose of CLEARON S 954 reagent, which obtained the best results, was 120 g/t of concentrate.
The economic effect of introducing CLEARON S 954 reagent includes the following:
- reduced electricity consumption;
- reduced costs of maintenance;
- reduced consumption of filtration fabric;
- increased price of IOC, associated with decrease in moisture;
- IOC marketing development.
Additional factor:
The implementation of IOC vacuum filtration technology with the use of CLEARON S 954 reagent at Ingulets mining and concentration complex allowed, despite the crisis in the steel industry, to increase IOC production and sales up to 1 200 000 tons / month, which is 10 -15% above the design capacity of the complex.
| PHYSICAL-CHEMICAL PARAMETRS | |
|---|---|
| Appearence | Turbid or clear liquid |
| pH Value | 5-7,5 |
| Iodine number | <2 |
| Melting Point | <-20oC |
| Solubility in water | Partially Sloluble |
| Density (23oC) | 0.93 g/ml |
| Viscosity (23oC) | Approx/ 50 mPa.s |
Environmental requirements:
- CLEARON S 954 is insoluble in water, almost completely adsorbed on the surface of the solid phase
- does not produce fumes because does not have the boiling point, hence it cannot enter the air of working zone;
- has no odor and does not foam;
- rapidly biodegrades in water;
- safe for transportation and storage.