Carbon* Analytical Instrument Usage and Maintenance

I. Operation Procedure 1. Turn on the power supply and oxygen [Press the reset button after turning on the power supply switch of the programmable box, keep the oxygen decompression table at 0.04Mpa, and the flowmeter at (80-120)L/h]

2. Raise the lift handle, remove the copper crucible with a pair of tongs and add a small amount of silicon molybdenum powder, standard sample (sample) [steel 1.00g iron 250.00mg (plus a small amount of pure iron flux agent)], a small amount of tin particles, close crucible.

3, open before the oxygen, after the control 4, on the zero 5, preparation 6, reset 7, analysis 8, readings, calculations 2, maintenance 1, clean up the arc furnace dust removal dust in the dust bin, unscrew the dust bin at the same time Turn on oxygen before blowing the furnace pipe. Clean the furnace body: Clean it with a test tube brush, taking care not to brush the quartz tube (every day or every shift).

2. If the absorbent cotton turns yellow in the filter tube of the electric arc furnace, replace the filter paper and the absorbent cotton.

Third, leaks 1, electric arc furnace leakage: in the case of the closure of the opening of the former oxygen, after the control, use your fingers to suppress the analysis box sulfur cup above the outlet pipe for a while, turn off the front oxygen, to see if the sulfur cup float float, such as If the float rises, it indicates that the electric arc furnace is leaking, then the seals and piping interfaces of the furnace body and the dust removal chamber must be thoroughly inspected, as well as the interface of the electromagnetic valve in the tank and all the pipeline interfaces.

2. Analyze tank leak: Press and prepare and reset. Press and hold the zero key to make the liquid level of the measuring cylinder at the zero scale position of the scale cylinder. If the liquid level does not drop after 1 minute, it indicates no leak, otherwise it leaks.

3, check whether the pipeline leakage method: a look at whether the cracking; second listen whether there is leakage sound; three with soapy water wiped at the interface to see if there is a bubble.

4, always check the level of the bottle of the electrode is corroded. If corrosion should be replaced in time. The long electrode of the leveling flask is at the bottom of the bottle; the short electrode is the liquid level of the measuring cylinder at the barrel neck, and the short electrode just hits the level of the leveling flask.

5. If the iodine burette cannot be added, press the reset button immediately to check whether the iodine bottle contains iodine solution. If there is no iodine solution, add the iodine solution in time. Check if the clamp is too tight. It is necessary to loosen up properly.

6, the analysis results are generally low for the combustion is not enough or potassium hydroxide solution absorption capacity is poor; specific phenomenon, see the arc furnace instructions after the failure and treatment methods or replace the potassium hydroxide solution, the analysis results are generally higher than the calibration Correctly, it should be re-calibrated.