The crucible has more type specifications, which is not limited by the production scale, batch size and variety of melting substances in application, and can be arbitrarily selected, which has strong applicability and does not react with the smelted substances. The following is introduced by the furnace lining material manufacturer!

1, the crucible early use, the sintered layer is thin, should avoid high-power power, produce excessive electromagnetic stirring, so that the lining damage, usually within the first 48h does not exceed 60-80% of the total power of t.

2. When adding material. The crucible should be avoided when the material hits it, which will cause damage to the crucible. Especially after the cold furnace, the strength of the crucible is very low, and it is strictly prohibited to mechanically increase the block material. To prevent the crack increase, resulting in the possibility of metal infiltration, resulting in source furnace accidents.

3, after the furnace sintering is completed, the operator is required to have a strong sense of responsibility, always pay attention to check the lining condition, and keep the whole system in good condition.

4, intermediate frequency furnace after the end of work, regardless of any reason. The cooling water system circulates for about 12h, and the temperature in the furnace is lower than 200C, otherwise the furnace lining and induction coil will be damaged or even scrapped.

5, during operation or empty furnace. The crucible temperature is still very high. The number and time of opening the furnace cover should be reduced. To reduce heat loss and the emergence of cleft mosquitoes.

6, normal production should be full furnace, prohibit half furnace production. Lest the temperature difference is too large to crack.

7, the normal melting should be the side of the material melting, do not allow the hot metal after clearing and then add material. In particular, the waste iron material added to f is too large, resulting in large fluctuations in the liquid level of hot metal, and the hot metal is easy to penetrate into the furnace lining above the liquid level, causing accidental penetration.

8, the newly rammed lining should be used continuously at least 3-6 furnaces, which is conducive to the formation of a sintered layer of sufficient strength.

The above information is provided by the furnace lining material manufacturer

9. Furnace lining cooling method

a After the hot metal, immediately put in a number of scraps, so that the furnace lining natural cooling.

b Empty the hot metal and cool it naturally.

c Empty the hot metal. Quick cooling with fan and duct.

It is recommended that s be cooled according to method a.

10. The furnace lining should be managed by special personnel

a Before starting the furnace, someone must confirm and agree before starting the furnace.

b After melting the furnace, someone needs to check the degree of erosion of the furnace lining in time to determine whether the furnace lining can continue to be used and to repair it in time. - If the furnace is found to be in poor condition; If the safety of production is affected, the furnace should be stopped immediately and the relevant authorities should be notified in time.

c The joint of the furnace nozzle and the furnace lining is easy to crack and leak, and should be carefully observed before each furnace opening. Take remedial measures in time.

d. Stove collar made of GS-01. Due to the different expansion coefficient of the lining material, cracks occur, which need to be repaired in time. Avoid delamination resulting in puncture.

e. When cooling, crack 22m should be repaired in time.

11. Determine whether the furnace lining is removed:

a When the thickness of the lining is less than 90 blood, it must be removed.

b When the furnace lining report current is too large, confirm the correct operation of the report. At this time, the furnace needs to be removed.

c When under a - rated DC voltage, the weight of hot metal in the early and late stages is equal, and the lining has no obvious local erosion. If the DC current rises by 15-20%, the furnace lining must be removed. In the process of use, if the DC ammeter and DC voltmeter are shaken greatly, or it is found that the DC ammeter continues to rise and the DC voltmeter continues to fall, it is proved that the furnace lining has leaked, and emergency measures need to be taken immediately.

12 No liquid iron is allowed to remain in the furnace at the end of smelting. Avoid large temperature difference between the furnace body and the crucible strain, resulting in cracks.

13, crucible cold lining melting operation requirements (cold furnace start depends on the shutdown time)

a. Fill the furnace with iron blocks.

b Cover the furnace and heat the gold charge in the furnace to 900C at 150C/h.

c At 900C heat preservation for 6h. During this time, no liquid metal is allowed!

d After the end of insulation, it can be melted normally.

e Addition sequence of various charges in the melting process: first add the charge with lower melting point and smaller primary burning loss. The charge with higher melting point and larger burning loss of elements is added. Ferroalloy. Later added.

f When charging, special attention should be paid to the cold wet charge and galvanized charge to be added to other charges. Above, let it slowly enter the liquid iron Shen, to avoid splashing of liquid iron. Metal charge is strictly prohibited to be mixed with bright, sealing head and other explosive items.