CN86205837U

CN86205837U - Composite heat-insulating cap for casting steel ingots and foundry goods

Info

Publication number: CN86205837U
Application number: CN 86205837
Authority: CN
Inventors: 吴明华; 顾咸章; 王开亚; 贝炳荣; 钱发根; 刘增祥
Original assignee: WUJIANG CASTING MATERIAL FACTORY JIANGSU PROV
Current assignee: WUJIANG CASTING MATERIAL FACTORY JIANGSU PROV
Priority date: 1986-08-15
Filing date: 1986-08-15
Publication date: 1987-08-19

Abstract

The utility model relates to a composite heat-insulating cap for casting steel ingots and casting, which is provided with an internal and an external layers. The internal layer is a heat-insulating working layer which is composed of quartz sand or power plant soot float, organic fiber, and inorganic fiber. The external layer is a heat preserving layer which is composed of quartz sand or bauxite, magnesite, organic fiber, inorganic fibers, and power plant soot. Waterglass or phenolic resin is adopted as the agglomerant. The cap body is formed integrally once and the inherent quality of the steel ingot can be improved when the heat-insulating cap is used for casting steel ingots. The product rate can be increased by 1.5 percent to 2 percent. When the utility model is used for casting, the inherent quality can be improved, dozzle metal can be saved and the rate of the finished products is increased.

Description

The composite adiabatic cap that cast steel ingot and foundry goods are used

The utility model belongs to the insulation insulating product of metallurgy, casting industry.

When cast steel ingot or foundry goods, bottom the V-arrangement shrinkage cavity that makes ingot head and casting pressing port part, upwards pass, improve the lumber recovery and the inherent quality of steel ingot, foundry goods, the rising head that generally need reach casting sand mold on the mouth of ingot mould is provided with the insulation head box.The head box that is used for steel ingot and foundry goods at present has several like this: the cinder cap; In the cinder cap, overlap the multiple cap bag of one deck heat-insulating shield cap again; The steel bushing head box that heat-insulating shield cap external application steel bushing is reinforced (Japanese Fu Saike company early eighties just is to use this steel bushing head box during the field trial performance of the 3rd, the 5th steel plant in Shanghai); Place heat-insulating shield cap, exothermic riser sleeve (Beijing College of Iron and Steel Technology applied for a patent on September 29th, 1985, and application number is 85204026, was stated from Chinese Patent Office utility model communique on June 11st, 1986) in the steel ingot die orifice.There is the weak point of following one side or several respects respectively in existing insulation head box: heat-insulating property is poor, elevated temperature strength is low; Complex manufacturing technology, energy consumption height, cost are big; Make ingot head the carburetting phenomenon occur or cause steel ingot component segregation (this is especially harmful to stainless steel and steel alloy); Operator's labour intensity is big during use; Change the design of existing ingot mould.

The purpose of this utility model provides a kind of good heat insulating, elevated temperature strength is big, carbon containing not, lower, the less energy consumption of production cost, easy and simple to handle during use, when being used for ingot steel casting, do not need to change the head box of ingot mould design,, improve lumber recovery to improve the inherent quality of steel ingot, foundry goods effectively.

Below in conjunction with description of drawings structure of the present utility model.

Fig. 1 is that the front view of the utility model composite adiabatic cap and A-A are to cutaway view.

The utility model composite adiabatic cap divides inside and outside two-layer, the adiabatic operation layer that internal layer 5 is made for heat-insulating material, and the heat-insulation layer that skin 6 is made for insulation material, materials at two layers uses binding agent Integratively formed.

The utility model composite adiabatic cap internal layer heat-insulating material can be made up of aggregate quartz sand or power plant's cigarette ash boom and organic fiber, inorfil; Outer insulation material can be made up of aggregate quartz sand or aluminium vanadine, magnesia and organic fiber, inorfil, power plant's cigarette ash. Binding agent available water glass or phenolic resins burst when the high temperature for preventing the cap body, several metal can be set in outer strengthen binding round.

The utility model composite adiabatic cap is when being used for the melt cinder cast, and end face 3 is provided with the cinder notch 8 that overflows thereon.

The utility model composite adiabatic cap is owing to inside and outside layer is composited, therefore compare with existing insulation head box and have insulation capacity good (the naked hand of heat-insulation layer outer surface touches non-scald on hand during use), carbon containing not, elevated temperature strength big (the cap external surface need not add steel bushing during use), production cost is lower, use advantages such as easy to operate, be used to pour into a mould steel ingot (particularly stainless steel, steel alloy) and can improve inherent quality, improve steel ingot lumber recovery 1.5-2%, be used for foundry goods and can save riser metal, improve inherent quality, improve yield rate.

Embodiment.

Composite adiabatic cap as shown in Figure 1, wherein 1 is outer surface, and 2 is inner surface, and 3 is the upper surface, 4 is the lower surface, and 5 is internal layer-adiabatic operation layer, and 6 is skin-heat-insulation layer, 7 for strengthening hoop, and 8 are the cinder notch that overflows, and internal layer material therefor and ratio are quartz sand 80%, cardboard fiber 7%, mineral wool 8%, silicon cotton 5%, add waterglass 18%, outer material therefor and ratio are quartz sand 85%, flaxen fiber 1.5%, glass fibre 1%, power plant's cigarette ash 12.5% adds waterglass 18%; Interior layer thickness is 20 millimeters, and outer layer thickness is 30 millimeters, and cap body size is decided as required; Iron wire with 2 millimeters of φ in outer is provided with twice reinforcement hoop.When making, respectively inner layer material, cladding material are fully mixed thoroughly earlier by the utility model composite adiabatic cap, adding binding agent more respectively stirs, make the ectonexine material all be leather hard, pour cladding material into external mold then, pour inner layer material into internal mold again, take out internal mold again, send into compaction moulding of press, put into the tunnel cave oven dry then and promptly make the utility model composite adiabatic cap.

Claims

1, a kind ofly pour into a mould the head box that steel ingot and foundry goods are used, it is inside and outside two-layer to it is characterized in that this head box divides, and internal layer is the adiabatic operation layer that heat-insulating material is made, the outer heat-insulation layer of making for insulation material, and two layers of material use binding agent is Integratively formed.

2, by the described head box of claim 1, the heat-insulating material that it is characterized in that internal layer is made up of aggregate quartz sand or power plant's cigarette ash boom and organic fiber, inorfil; Outer insulation material is made up of aggregate quartz sand or aluminium vanadine, magnesia and organic fiber, inorfil, power plant's cigarette ash.

3, by claim 1 or 2 described head boxs, it is characterized in that binding agent is waterglass or phenolic resins.

4,, it is characterized in that being provided with in the skin several metal that prevents that cap height temperature from bursting and strengthen hoop by claim 1 or 2 described head boxs.

5, by claim 1 or 2 described head boxs, it is characterized in that cap body upper surface is provided with excessive cinder notch.