Inline silicon deposition in a pickling plant

A device for depositing undissolved silicon compounds from a pickling fluid in a pickling plant having at least one pickling circuit, the pickling circuit comprising:

• a pickling tank of the pickling plant for pickling metal strips;
• a return line between the pickling tank and a circuit tank;
• a pressure line between the circuit tank and the pickling tank;
• a circulation pump having a maximum pump capacity of from 500 to 600 cubic meters per hour for circulating a main volume flow of pickling fluid;
• and
• a heating device arranged in the pressure line for heating the main volume flow to a process temperature;
• wherein the device comprises:
• a flocculation device having one or more mixing zone containers configured to introduce at least one flocculation aid into the main volume flow;
• and
• a deposition device arranged in the circuit tank configured to deposit undissolved silicon compounds directly from the main volume flow.

A method for depositing undissolved silicon compounds from a pickling fluid in at least one pickling circuit of a pickling plant, the pickling circuit comprising:

• a pickling tank of the pickling plant for pickling metal strips;
• a return line between the pickling tank and a circuit tank;
• a pressure line between the circuit tank and the pickling tank;
• a circulation pump;
• and
• a heating device arranged in the pressure line;
• wherein the method comprises:
• circulating, by the circulation pump, a main volume flow of from 500 to 600 cubic meters per hour of pickling fluid from the pickling tank through the return line into the circuit tank and via the pressure line back into the pickling tank;
• introducing, by a flocculation device, at least one flocculation aid into the main volume flow having one or more mixing zone containers;
• depositing, by a deposition device arranged in the circuit tank, undissolved silicon compounds directly from the main volume flow;
• and
• heating, by the heatin device, the main volume flow to a process temperature.