CN2407315Y

CN2407315Y - Nonferrous thermo-insulation melting furnace

Info

Publication number: CN2407315Y
Application number: CN 99238637
Authority: CN
Inventors: 夏成亮
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-31
Filing date: 1999-08-31
Publication date: 2000-11-22
Anticipated expiration: 2009-08-31

Abstract

The utility model relates to a nonferrous metal melting thermal insulation furnace which comprises a thermal insulation chamber, a melting chamber and a preheating chamber, wherein, the chambers are separated through heat resistance layers, and are respectively provided with channels which are controlled and connected through valves. The three chambers are formed into integration and the three chambers are independent. The melting chamber and the thermal insulation chamber use two independent heating sources. The thermal insulation and the melting can be simultaneously used, and can be also used independently. The utility model has the advantages that the cost can be reduced, and the operation is simple and convenient. The utility model is suitable for continuous operation and intermittent operation.

Description

The smelting non-ferrous metal holding furnace

The utility model belongs to a kind of smelting non-ferrous metal holding furnace.

The smelting furnace of existing non-ferrous metal and the structure of holding furnace have following three kinds:

1, concentrates melting furnace: fixed fuel oil, combustion gas pond formula reverberatory furnace, reversible crucible

With pond formula middle frequency furnace.

2, disperse holding furnace: pond formula holding furnace, intermediate frequency crucible furnace.

3, the double holding furnace of fusing: pond formula melting furnace, crucible furnace.

The fusion temperature of non-ferrous metal, holding temperature (serviceability temperature) and preheat temperature all are not equal to, and are that the technological property of smelting non-ferrous metal determines; That non-ferrous metal molten metal in fusion process has is easily air-breathing, easily produce the characteristic of oxidation.The factory of present high-pressure casting both at home and abroad, permanent mold casting, sand casting and extrusion casint, usually adopt the melting furnace of a combustion gas or fuel oil to concentrate fusing, use many holding furnaces to carry out supporting use, molten metal bath is sent into holding furnace with casting ladle or delivery system; Its structure Design melting furnace and insulation all are independently.The factory that also has uses melting furnace to substitute holding furnace and uses, and its structural design also only is the structure of melting furnace.

1, concentrates fusing, dispersion insulation.The molten metal that fusing is good is using casting ladle to send in the process of holding furnace, and the temperature of molten metal will reduce rapidly, must be remedied by the heating again of holding furnace, and heat loss is bigger; Molten metal flows into casting ladle from melting furnace, pours into holding furnace from casting ladle again, and second pouring makes molten metal have air-breathing and oxidation, in fusion process the degasification and the refining treatment of having carried out, quality of molten metal is descended.

2, melting furnace double as holding furnace.During use, adopt same heating source to melt and be incubated, as die casting factory smelting aluminium alloy, the general employing fast melted, it is the high melt cast cold, fusion temperature and pouring temperature are unequal, the temperature of melting must be adjusted to the pouring temperature that satisfies technique initialization, simultaneously, because the molten aluminium alloy in the stove constantly uses, storage constantly reduces, and need constantly replenish ingot, temperature will descend rapidly in its smelting furnace, temperature should be supplied setting value and can continue to use, thereby take the mode of batch operation to remedy.

Concentrate melting furnace, disperse holding furnace, that melting furnace double as holding furnace all exists heat loss is bigger, energy consumption height, easily air-breathing and oxidation of molten metal, quality is descended, labour intensity strengthens, and the reliability of safety in production reduces, the non-uniform temperature and the comparatively shortcoming of difficulty of working continuously.

The purpose of this utility model provides the smelting non-ferrous metal holding furnace of the heat insulation integrated structure of a kind of melting, to improve operating environment, reduces cost, and adapts to continuously and produces.

The utility model comprises moist closet, melting chamber and preheating chamber, separate by refractory layer each chamber, respectively be provided with passage again and control communications and liaison by valve, three Room that make are that one and three Room independently exist, melting chamber and moist closet adopt two heating sources independently separately, insulation and fusing both can be used simultaneously, can independently use again.

The utility model carries out preheating and realizes fusing fast motlten metal, can reduce heat loss, reduces material consumption, cuts down the consumption of energy; Prevent the air-breathing and oxidation of molten metal, improve the quality of molten metal; The realization melting temperatur is even, reduces operator's labour intensity, promotes safety in production; Improve operating environment, reduce cost, be suitable for working continuously and batch operation, simple to operation.

Accompanying drawing 1 is the utility model structural representation;

Accompanying drawing 2 is an accompanying drawing 1A-A structure cutaway view;

Accompanying drawing 3 is an accompanying drawing 1B-B structure cutaway view.

As shown in Figure 1 and Figure 2, the utility model comprises moist closet (1), melting chamber (2) and preheating chamber (3), and separate by refractory layer (4) each chamber, respectively be provided with passage (5) again by valve (6,7) the control communications and liaison make three Room (1,2,3) be one and three Room (1,2,3) the independent existence, two of melting chamber (2) and moist closet (3) employings be heating source independently separately, insulation and fusing both can be used simultaneously, can independently use again.

As Fig. 1, Fig. 2, shown in Figure 3, preheating chamber (3) is provided with feeding door (3a), the cylinder 1 (3b) of loosing core, side door are loosed core cylinder (3c), separate by roof door (7) between preheating chamber (3) and the melting chamber (2), the cylinder 2 (7a) of loosing core is located on the roof door (7), and the metal charge in the preheating chamber (3) is knocked down melting chamber (2) after opening roof door (7).Melting chamber (2) is provided with melting chamber door (2a), bocca (2b), use refractory layer (4) to separate on every side, the bottom, chamber is provided with outlet (2c), communicate with moist closet (1) by liquation partition apparatus (6) control, melting chamber (2) sidepiece is provided with slag trapping chamber (8), and slag trapping chamber (8) is provided with passage (8a) and communicates with melting chamber (2), moist closet (1).Moist closet (1) is provided with electric heater unit (1a), thermal radiation device (1b), moist closet (1) sidepiece is provided with gets soup chamber (9), thermometric chamber (10), its three Room (1,9,10) each is separated with refractory layer (4), and refractory layer (4) is made with heat proof material, three Room (1,9,10) being provided with passage (9a) bottom communicates with each other.Melting chamber (2), moist closet (1), preheating chamber (3) skin are heat-insulation layer (5), and heat-insulation layer (5) is made with insulation material.Roof door (7), liquation partition apparatus (6) open and close by operated pneumatic valve control.

Moist closet (1) adopts the electric heater unit (1a) of control automatically, by the heat radiation on molten metal surface being carried out the heat conduction, can realize independently temperature control, melting chamber (2) adopts fuel oil or combustion gas to heat, by heating to metal and furnace lining, make metal molten, molten metal liquid is carried out degasification, refining treatment.By opening of liquation partition apparatus (6), with the molten metal of melting chamber (2) from flowing into moist closet (1).

Preheating chamber (3) is the waste heat that utilizes melting chamber (2), and the metal ingot is dewatered and preheating fully, opens roof door (7) by control valve, and the metal ingot of preheating is fallen into melting chamber (2) automatically.

Insulation material adopts Japanese import calcium silicate board, has not contain asbestos, and thermal conductivity is low, and heat shock resistance is nonwetting, the characteristics that heat-insulating property is excellent.Thermal conductivity factor: be 0.125W/ (M.K) in the time of 400 ℃, utilize the novel smelting holding furnace of this material made, during its 1000 ℃ of indoor temperature of fusing, (45 ℃ of furnace outer wall temperature, because heat loss is little, melt and be incubated required heat and can correspondingly reduce, use calcium silicate board as the furnace lining of moist closet (1) and the refractory layer (4) of melting chamber (2), compare with traditional asbestos, refractory brick and other melting and heat preservation stove of smashing the making of notes refractory material, the thermal efficiency will increase substantially.

Utilize melting chamber (2) waste heat to supply with preheating chamber (3), make it dehydration and preheating, realize fusing fast, energy efficient the abundant preheating of metal; The molten metal that fusing is good has avoided using the transhipment of casting ladle, makes the no longer air-breathing and oxidation of molten metal, reaches the quality that improves molten metal, reduces heat loss; Satisfy the needs of working continuously, improve the utilization rate of smelting furnace, strengthened the reliability of safety in production.As be equipped with auto feed and temperature control system and can realize automation control.

As shown in Figure 1, moist closet (1), melting chamber (2) are provided with thermometric thermocouple (11 ').

Claims

1, a kind of smelting non-ferrous metal holding furnace, comprise moist closet, melting chamber and preheating chamber, it is characterized in that each chamber separates by refractory layer, respectively be provided with passage again and control communications and liaison by valve, three Room that make are that one and three Room independently exist, melting chamber and moist closet adopt two heating sources independently separately, and insulation and fusing both can be used simultaneously, can independently use again.

2, non-ferrous metal holding furnace according to claim 1, its spy is that preheating chamber is provided with feeding door, the cylinder 1 of loosing core, side door are loosed core cylinder, separate by roof door between preheating chamber and the melting chamber, the cylinder 2 of loosing core is located on the roof door, and the metal charge in the preheating chamber is knocked down melting chamber by after the opening of roof door.Melting chamber is provided with melting chamber door, bocca, separates with heat-barrier material on every side, and the bottom, chamber is provided with outlet, communicates with moist closet by the liquation partition apparatus, and the melting chamber sidepiece is provided with slag trapping chamber, is provided with passage and communicates with melting chamber, moist closet.Moist closet is provided with electric heater unit, thermal radiation device, and the moist closet sidepiece is provided with gets soup chamber, thermometric chamber, and separate with heat proof material its three Room, and the bottom is provided with passage and communicates with each other.Melting chamber, moist closet skin are made with insulation material.Roof door, liquation partition apparatus open and close by operated pneumatic valve control.