1, before the formal test, first do 1~2 waste samples, supplement the solution sulfur content, to reach the electrolysis end potential can be done as a positive sample. Do positive samples, in the porcelain boat weighing particle size less than 0.2mm air-dried sample 0.05g (weighing to 0.0002g), in the waste sample covered with a thin layer of tungsten trioxide, the porcelain boat into the quartz tray.
2, open the computer, double-click the "sulfur measurement program" icon, a program interface appears on the screen, the contents are: "Enter the necessary data", "open the existing report The contents are: "Enter the necessary data", "Open the existing report", "Do the waste sample", "Do the positive sample", "Print the current report" and "Exit system "The user can choose one of them as needed. The following are respectively introduced to the function and operation of each item.
(1), "enter the necessary data": click the item, enter the "sample delivery time", "sample delivery unit", "room temperature" and other data, click "OK" (click). "OK" (you can also temporarily do not enter the relevant data, directly click "OK", because in doing the positive sample, the program will again prompted to enter the necessary data).
(2), "open the existing report": click the item, select and open the folder where the report, select the report to be opened, click "open" can be. To print the report, click the printer icon.
(3), "do waste samples": click the item, the system prompts "into the coal samples" (click "OK", the test begins; click "Cancel", cancel the operation). Click "Cancel" to cancel the operation.) After putting in the coal sample and clicking "OK", the sample feeder starts to work, the waste sample test starts, and the screen displays the test situation. After the end of the waste sample test, the system prompts "now you can do the test", click "OK", and then you can do the positive sample.
(4), "do positive sample": click the item, the system prompts "whether to enter the necessary data", if you want to enter, click "Yes", click "OK" after input. Save; if not, click "No", the system prompts "put coal samples" (click "OK", the test begins; click "Cancel", cancel the operation). Click "OK", the test starts; click "Cancel" to cancel the operation). Click "OK" after putting in the coal sample, a table appears on the screen, the first column of the table is the number of tests, the second column is the weight of the coal sample, and the third column is the sulfur content. Click the bottom of the screen "start" button, enter the weight of the coal sample according to the prompts, click "OK", the screen appears as a small display box, the sample feeder began to work, controlled by the computer to send the sample stick to promote the porcelain boat were at 700 ℃ to stay 45 seconds, 1150 ℃ at 4 minutes and 45 seconds, the sample combustion, Coulomb titration is carried out automatically. When the electrolysis indicator light on the display box constantly appear in the number, the table when the test is underway. When the quartz tray and boat are returned to their original positions, the sulfur content is listed in the table, and the screen indicates that sampling has been completed, so please press OK to exit. Click OK, put on the second coal sample, click the start button at the bottom of the screen, according to the above method to do the next coal sample. You can make several coal samples in this cycle. When you finish more than 3 coal samples, click "exit", the system prompts "whether to save", click "save" can be.
Note: After the end of the test, the data whether to save the disk, whether the report is printed by the operator to determine.
(5), "print the current report": click the item, select the report to be printed, click "print the current report" to print.
(6), "exit the system": click the item, you can exit the sulfur measurement program.
3, the end of the experiment, close the air pump and stirrer, the furnace heating current regulator to the minimum after turning off the power switch, release the electrolyte, and distilled water to clean the electrolytic cell and electrodes, electrolyte can be reused, the length of time according to the number of times of reuse and the specimen's sulfur content is high or low. If the PH value of the electrolyte is less than or equal to 1, the electrolyte should be discarded.
The test should be conducted continuously. If the intermediate interval is long, before making a positive sample to add a waste sample. Input the moisture value of the sample into the computer. Otherwise, the results are analyzed base sulfur content.