CN2602033Y

CN2602033Y - Energy conservation type austenitic-bainite ball iron heat treatment device

Info

Publication number: CN2602033Y
Application number: CN 02292430
Authority: CN
Inventors: 赵文鹤
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-06
Filing date: 2002-12-06
Publication date: 2004-02-04
Anticipated expiration: 2012-12-06

Abstract

The utility mode discloses an energy-saving aubay ductile iron heat treatment device, which uses the coke as the fuel. The furnace bottom board of a heating furnace of the utility model uses the refractory brick to form a passage toward the fire outlet; the fire outlet of the heating furnace is connected by an exhaust gas pipe with a salt bath furnace with double-layer body structure, supplying the heat to the salt bath furnace. The device can be used for the quenching of the aubay ductile iron etc.

Description

Energy-saving austempered ductile iron thermal treatment unit

Affiliated technical field

The utility model relates to a kind of available coke provides the isothermal quenching device of energy, is particularly useful for the production of austempered ductile iron.

Background technology

Austempered ductile iron is a kind of new engineering materials, and it has very high over-all properties.Common magnesium iron just can obtain austempered ductile iron by isothermal quenching.Workpiece process furnace and salt bath furnace are the necessary equipment of isothermal quenching.At present, these two kinds of most electricity consumptions of stove provide energy, and facility investment is big, thermal treatment expense height.With the coal is the process furnace of fuel, though expense is lower, it is big to exist the interior temperature difference of stove, temperature control difficulty, and problems such as tail gas pollution environment are not suitable for the production of austempered ductile iron workpiece.The existence of these problems has influenced the popularization of austempered ductile iron.

Summary of the invention

It is the process furnace of fuel with the coke that the utility model has designed a kind of, and the tail gas with process furnace provides energy to salt bath furnace simultaneously.

The technical scheme that its technical problem that solves the utility model adopts is: be built into two combustion chambers and a workpiece heating chamber with refractory brick and lagging material in a box-type metal casing.The combustion chamber links to each other with heating chamber by bocca.Establish a firebreak in the heating chamber side, shop one drop-bottom below the heating chamber, drop-bottom have just formed the passage that leads to crater like this with there being the transversely arranged refractory brick of certain distance to take on below drop-bottom.One blast chamber is arranged at the bottom, combustion chamber, and blast chamber links to each other with gas blower by pipeline, more than constitutes the process furnace part.Salt bath furnace is to constitute with the double-level-metal housing, set up dividing plate between the inner and outer shell, make from advancing the flame spirrillum rising that burner enters, discharge from the tail gas outlet, the space that the inner layer metal housing forms is called the fused salt chamber, the water cooler that a side in the fused salt chamber has a copper pipe to make, water cooler one side is established a samming agitator.The burner that advances of the crater of process furnace and salt bath furnace is connected with exhaust duct.There is a tap to be connected with chimney by another conduit and tail gas valve at the middle part of this section conduit.The tail gas outlet of salt bath furnace also links to each other with chimney by one section conduit and heating valve.

The beneficial effects of the utility model are, workpiece three faces in the heating chamber are heated, and have reduced the temperature difference in the stove, and the high-temperature tail gas that process furnace is discharged can provide energy to salt bath furnace again, has improved heat utilization efficiency.Start-stop with gas blower can be controlled furnace temperature easily, has reduced the thermal treatment expense, and the tail gas of discharging from chimney does not have visible flue dust, and is free from environmental pollution.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a plot plan of the present utility model.

Fig. 2 is the structure iron of process furnace (A).

Fig. 3 is the structure iron of salt bath furnace (B).Wherein, Fig. 3 (1) is a front view, and Fig. 3 (2) is a vertical view.

A. workpiece process furnace among the figure, B. salt bath furnace, C. exhaust duct, E. heating valve, F. tail gas valve, G. chimney, 1. blast chamber, 2. burning door, 3. fire bars, 4. combustion chamber, 5. thermal insulation layer, 6. firebreak, 7. drop-bottom, 8. balance bar, 9. heating chamber, 10. counterweight, 11. left-hand doors, 12. right door, 13. tempering passages, 14. ash doors, 15. gas blower, 16. furnace shells, 17. temperature thermocouples, 18. body of heater, 19. advance burner, 20. furnace shells, 21. the tail gas outlet, 22. water coolers, 23. samming agitators, 24. dividing plate, fused salt chambers 25., 26. craters.

Embodiment

In Fig. 1, the crater (26) of process furnace (A) links to each other by the burner (19) that advances of exhaust duct (C) and salt bath furnace (B).The middle part of exhaust duct (C) connects chimney (G) by tail gas valve (F) and one section conduit, and the tail gas outlet (21) of salt bath furnace (B) is connected with chimney (G) by heating valve (E) and conduit.When needs during to the salt bath furnace heat supply, close tail gas valve (F), open heating valve (E).

The drop-bottom of taking on refractory brick in Fig. 2 (7) has changed the flame direction of travel, has reduced the temperature difference in the stove.

The dividing plate (24) of setting composition passage of flame in furnace shell (20) that double-layer plate is formed in Fig. 3 and the furnace shell, the inwall by furnace shell (20) provides heat to salt bath furnace.

Claims

1. isothermal quenching thermal treatment unit.With the coke is the process furnace of fuel, and the tail gas with process furnace provides energy to salt bath furnace simultaneously.It is characterized in that: the crater of process furnace links to each other by the burner that advances of exhaust duct and salt bath furnace.The middle part of exhaust duct connects chimney by the tail gas valve.The tail gas outlet of salt bath furnace also links to each other with chimney by heating valve.

2. according to claim 1 described thermal treatment unit, it is characterized in that: drop-bottom of in process furnace, taking on and the formed passage that leads to crater with refractory brick.

3. according to claim 1 described thermal treatment unit, it is characterized in that: the passage of flame that the dividing plate that is provided with in furnace shell that the double-layer plate in the salt bath furnace is formed and the furnace shell is formed.