1. General Rules
1. All staff who works for the reverberatory furnace (8 technical engineers &102 workers) must study carefully about all the relevant knowledge, such as quality management, smelting technology & safe production, etc. Study hard about the technology, improve the production craft & reduce the cost in order to improve the companys economic benefit.
2. Post Responsibility:
1. The responsibility of the Furnace Manager
2. Be mainly responsible for all the work on the reverberatory furnace, control the working progress & make sure if all the economic & technical specifications have been achieved.
3. Organize all the staff to study production technology, proceed technical innovation and labor competition and complete all the tasks arranged by the company on time.
4. Inspect, supervise and coordinate the production work of each shift and make sure that all the tools, equipment and light, etc. are complete and good.
5. Deal with all the problems coming out during the process of the production in time, supervise the inspectors to make sure that they will sample antimony liquid in time and give instruct to ladle the antimony liquid.
6. Make sure to handle all the work about the soaking sodium bicarbonate including the classification and how & where to put them away.
7. Keep the furnace safe, clean and civilized and obey the shift change rules.
1. Shift leader should arrange and inspect all the workers work in his/her shift, organize workers in his/her shift to handle the problems coming out in the production, complete the production task arranged with high quality and enough quantity, take a good record about the shift changes and the original production and keep the working place clean and tidy.
2. The furnace man should take the responsibility of furnace heating up, furnace operation, furnace shut down, prepare soft coal, eliminating the forming of furnace knur, ladle the e antimony liquid, damage slag ladle and swinging the bag .Make sure the temperature is right for the process of? deoxidize smelting refining and pulling soaks and ladle the antimony liquid. Keep the nostril of the furnace unimpeded and control exhausting and blasting volume to meet the technical requirement.
3. Also it is the duty for the furnace man to prepare raw materials according to the material Cmatching sheet and to do the work well, such as eliminating the furnace knur, making furnace nostrils and cleaning up smoke flue, etc. Wear labor-protecting things well when working, keep the workshop and its surround clean and tidy. No missing tools and if he /her will not work here, he must make good shift change
8. The requirements and specifications for the matching rate between fuel, sodiun bicarbonate and smelting materials.
1. The fuel

2.2 The alkali

2.3 Raw material lot Qty
Put certain raw material to the furnace according to the requirement of material-matching sheet.

1. Furnace heating up and start up
1. For resume of old furnace, make sure the temperature of the furnace chamber keeps at above 1000oC for one day.
2. For small repair, keep the temperature below 500 oC for one day and then 500-1000 oC for another day, then it is ok to put the material into the furnace.
3. Middle repair: After seven days, the temperature reaches 1100 oC gradually, and then start to put raw material into the furnace.
4. Heavy repair: keep the temperature at 200 oC for five days and make the temperature go up gradually to 1100 oC in the following ten days, and then start to put raw materials into the furnace.
2. The work of matching materials, preparing materials and adding materials
3. Match and prepare materials according to the relevant rules. Generally the material quantity put into the furnace should be controlled between 600-1200kg one time
4. When putting antimony trioxide to the furnace, the air blower must be turned off and stopped in order to reduce the missing of antimony trioxide. The distance between the furnace fuels and the arch is no less than 20cm.
5. The period of deoxidize smelting
6. According to the method- fire with thin coal for several times strictly. Do not add too much coal one time. Keep the coal bed at the thick of 350-400mm.Every shift raises smelting dregs for one or two times and loosen ashes for more than 9 times in time. Keep the furnace temperature high continuously.
7. Pay attention to the state of deoxidizing, 30 minutes after putting the materials, unclench the floating dregs for 5 times every 20 minutes. During the period of deoxidizing, push the furnace tail material forward and material side to the middle non-periodically in order to guarantee the deoxidize effect and process.
8. When the soaking dregs are pulled to the working door of the furnace, the worker must have a stop and raise the soaking rake up a little so that the antimony together with the dregs can flow back to the furnace. Before finishing pulling out the dregs, the worker should clean up the surround near the wall. If there are many impurities, the worker can mix the impurity at the bottom of the furnace with a stick or to remove the impurities with the low arsenic alkali slag of the previous refining production.
9. After finishing to pull out the soaking dregs for the first time, repeat the above ways of matching materials, adding materials & other operations until the antimony fluid is filled in the furnace. Take sample from it for gross antimony inspection. After all the above, the refining period comes.
10. According to the rule, the time of feeding-in materials should not be more than 56 hours.
11. The refining period
12. According to the arsenic content in the gross antimony trioxide, put the sodium bicarbonate batch by batch in accordance with the material- matching sheet. Every time, the quantity should be controlled between 600-800kg., no more than 1000kg. According to the impurity content of the antimony used, add impurity-remover agent batch by batch to eliminate impurities.
13. The refining temperature should be controlled between 750-900 oC. Sodium bicarbonate will be melted within 2.5 hours after been added into the furnace. After melting, the worker must adjust the wind and temperature in time by adjusting the valve of the wind pipe to reduce the amount of wind. Move the wind pipe every 15 minutes.
14. Every operation needs 6-8 hours and after finishing the operation, take sample for inspection. If the inspection result is qualified, then extinguish the fire and remove the coal dregs in the furnace and prepare for ladle of the antimony metal.
15. It takes 120 hours (5 days) to refining 20MT antimony liquid with 2.5-3.5% arsenic content.
16. The refining period of one furnace is generally controlled within 36 hours.
17. Preparation for ladle antimony liquid
18. The worker can prepare to ladle the antimony liquid if the content of arsenic and other impurity in the antimony liquid qualify with the relevant technical standard. The furnace manger will inform the relevant workers to prepare for ladle the antimony liquid.
19. Before ladle antimony, loosen the coal ashes in the furnace chamber and fill it fully with coals.? After the smoke has all been discharged, workers begin to ladle. During the time, do not add any coal any more.
20. Clean up the mold used for antimony casting.
21. Dry or preheat the ladle and antimony casting mold before ladle.
22. Do reorganize the working place and make it qualified to pour, no sundries and no water.
23. Ladle antimony liquid
24. Ladle and pour antimony liquid with moderate speed. Do not be too quick.
25. When removing the mold, the antimony fluid in the mold must be condensed for at least half an hour. Then you can remove the mold.
26. After removing the mold, keep the antimony block neat and well.
27. Do clean the working place and keep it neat and clean after finishing ladle.
28. According to the production arrangement, continue to the next producing circulation if it is required to burn the furnace again; if it is required to shut down furnace or transfer to other furnaces, then the workers should stop to add coal to the furnace and let the furnace cool gradually, and change to the next period of furnace heating up and operation etc.
29. Internal control standard of antimony ingot

Sb: 99.85%? As: 0.05%,? Pb: 0.05%,? Se: 0.005%,? Sn: 0.005%.

1. The internal control standard? for catalytic antimony ingot

?? Sb: 99.92%, As: 0.006%, Pb: 0.008%, Cu: 0.002%, Se: 0.001%, Ca: 0.002%, Sn: 0.002%
The total quantity of other heavy metals contains must less than 0.005%
11. Do take a record of the temperature 15 minutes before adding materials.