The cleaning of moulds and starting heads
The cleaning of moulds and starting heads is often a tedious and difficult work. Gotar has developed in the last years a unique process that makes the cleaning much easier as well as remarkably thorough.

Main advantages:

1. A method that is mild and non abrasive
2. Reduces handling and dismantling.
3. Prolongs moulds and starting heads life expectancy.
4. Uses biodegradable and non toxic products.

In the first place, the process will eliminate the grease and oil baked in the inner surfaces of the moulds. Secondly, by circulating Gotar product in closed circuit, it restores the water curtain produced by the inner circuit of the moulds by dissolving the tartar and the oxides that obstruct the multiple small openings that constitutes it.

Cleaning process:

1. Immersion of the moulds for a few hours in a vat filled with our degreaser, Gotar-DG.

2. The moulds are rinsed with clear water to remove the degreaser and all traces of contaminated residues.

3. Immersion of the moulds in Gotar-AL for a few hours. After the immersion period, circulate the product in the inner circuit of the moulds using a circulatory pump, until a perfect curtain of water is obtained.

4. Rinse by circulation the inner circuit of the moulds with clear water.

The duration of the immersion period may vary depending of the quantity of dirt and tartar clogging the moulds.

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Gotar has worked extensively with ALCAN, a world leader in the aluminum industry. In 1998, the cleaning of 61 precipitator-circulating systems at the Hydrate 1 plant helped ALCAN save more than $1M. These savings will recur every year the plant is in operation. This estimate does not take into account further savings that come from the safety aspects of Gotar's products.

Due to positive results, ALCAN has budgeted the regular cleaning of all their standpipes. Prior to Gotar's proposed solution, there was no known method to efficiently clean this kind of equipment. All prior attempts had given unsatisfactory results, either because of their inefficiencies or because the acids used in these other methods were damaging the pipes and equipment.

To clean this system, the pipes were filled with 60 liters of Gotar- D and circulated by using a 3 HP pump. After six hours, Gotar had completely removed the tartar, iron deposits and the copper oxide that obstructed the inside of the cooling system.

After the cleaning, an increase in the efficiency of the system was measured because the operating temperature was lowered by approximately five degrees Celsius. Gotar's methods, products and technology not only increase efficiency, but also help extend the longevity of the equipment.

Rotating furnace		Ball ring pillar coolers
Gotar installation

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This is one of the numerous uses for Gotar's products. The pickling of hydraulic piping requires a unique procedure and special care. The efficiency of Gotar products enables the piping to pass easily the three microns (3mm) test for filtered particles.

Before using a new hydraulic system, it is necessary to remove all remaining particles, oxides and contaminants at the time of welding. To do so, Gotar has devised a procedure consisting of four main steps:

1. Following a pre-test (to check if there is any leakage), use compressed air or nitrogen gas to expel the biggest contaminant particles.

2. Inject and circulate the degreaser, Gotar-DG, to remove any trace of oil and grease. Rinse with clean water.

3. Inject and circulate Gotar-DF01 to remove corrosion and other contaminants and to thoroughly clean the metal. Dry with compressed air or nitrogen gas.

4. Inject and circulate Cassis A oil, using a three microns (3mm) filter, for two hours. Empty the circuit and dry thoroughly using nitrogen gas.

Total time for the whole procedure may vary. It will normally take from 10 to 18 hours.

Gotar specializes in the removal of corrosion, tartar, and carbon deposits. Other uses include, difficult to reach surfaces, particularly on costly equipment such as piping, heaters, coolers, heat exchangers, condensers, boilers, radiators, and other related equipment.

The cleaning procedures are mostly done on site, generally without having to dismantle the equipment, or in our facilities.

The inside of the hydraulic system's piping has to be cleaned perfectly.		The Cassis A oil is hated to 66°C (150°F) and filtered at three microns (3mm).
Gotar's technicians preparing the hydraulic piping for the pre-test.

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