Back to results
US 10,704,151 B2Granted
Pickling apparatus and pickling method
AssigneePosco
InventorHyoung-Kuk Park
Life of this patent
Estimating the term…
Abstract
A pickling apparatus includes a plurality of pickling tanks in which a scale of a steel plate is removed while the steel plate is advanced and sequentially dipped; an intermediate spraying unit, disposed between a pickling tank at the front end and a pickling tank at the rear end, for spraying a pickling solution onto the steel plate; and a pickling solution supply means configured to provide a pickling solution of a concentration used in the pickling tank at the rear end to the intermediate spraying unit, wherein a wringer roll disposed between the plurality of pickling tanks is removed.
Claims5
A pickling apparatus comprising;
- a plurality of pickling tanks in which scale of a steel plate is removed while the steel plate is advanced and sequentially dipped;
- an intermediate spraying unit disposed between a forward pickling tank and a rear pickling tank to spray a pickling solution to the steel plate;
- and
- a pickling solution providing unit providing a pickling solution having a concentration used in the rear pickling, tank to the intermediate spraying unit,
- the pickling solution providing unit includes:
- a plurality of circulation tanks arranged to respectively correspond to the plurality of pickling tanks and maintaining a pickling solution level of the picking tank as the pickling solution is circulated, with the corresponding pickling tank;
- and
- a supply line supplying the pickling solution from a rear circulation tank corresponding to the rear pickling tank to the intermediate spraying unit,
- wherein a concentration of the pickling solution accommodated in the plurality of pickling tanks is increased toward the rear pickling tank,
- wherein the pickling apparatus further comprises a pickling solution transfer unit transferring the pickling solution sprayed by the intermediate spraying unit to the front circulation tank corresponding to the forward pickling tank,
- wherein the pickling solution transfer unit includes;
- a connection chamber connecting the forward pickling tank and the rear pickling tank and including the intermediate spraying unit;
- and
- a transfer line connected to the front circulation tank corresponding to the forward pickling tank from the connection chamber and transferring the pickling solution sprayed by the intermediate spraying unit, and
- wherein a wringer roll disposed between the plurality of pickling tanks is eliminated.
12 more elements
A pickling method comprising:
- a scale removing operation in which a scale of a steel plate is removed while the steel plate is advanced and sequentially dipped in a plurality of pickling tanks;
- an intermediate spraying operation in which the pickling solution is sprayed to the steel plate by an intermediate spraying unit between a forward pickling tank and a rear pickling tank during the scale removing operation;
- and
- a pickling solution providing operation in which the pickling, solution having a concentration used in the rear pickling tank is provided to the intermediate spraying unit, before the intermediate spraying operation,
- wherein in the pickling solution providing operation, a plurality of the circulation tanks are arranged to respectively correspond to the plurality of pickling tanks and the pickling solution is supplied to the intermediate spraying, unit from a rear circulation tank corresponding to the rear pickling tank, among the plurality of circulation tanks maintaining the pickling solution level of the pickling tank, as the pickling solution is circulated, with the corresponding pickling tank,
- wherein a concentration of the pickling solution accommodated in the plurality of pickling tanks is increased toward the rear pickling tank,
- wherein the pickling method further comprises a pickling solution transfer operation in which a connection chamber connecting the forward pickling tank and the rear pickling tank and including the intermediate spraying unit transfers the pickling solution sprayed by the intermediate spraying unit to the front circulation tank corresponding to the forward pickling tank, and
- wherein a wringer roll disposed between the plurality of pickling tanks is eliminated.
5 more elements
Dependencies are inferred from the claim text.