CN107144136A

CN107144136A - A kind of refractory brick attachment structure

Info

Publication number: CN107144136A
Application number: CN201710506085.4A
Authority: CN
Inventors: 周迪
Original assignee: Changxin Xin Di Refractory Material Factory
Current assignee: Linkou Yuhua Refractory New Materials Co ltd
Priority date: 2017-06-28
Filing date: 2017-06-28
Publication date: 2017-09-08
Anticipated expiration: 2037-06-28
Also published as: CN107144136B

Abstract

The invention discloses a kind of electrical kiln refractory brick of light thermal-insulation, belong to technical field of refractory materials, be made up of fine and close supporting layer and porous heat-insulation layer combined with it；When piling up electrical kiln, the supporting layer constitutes the outer layer of refractory brick packing structure, and the heat-insulation layer constitutes the nexine of refractory brick packing structure；The porosity of the supporting layer is 0% ~ 5%, and the porosity of the heat-insulation layer is 5% ~ 45%.Its weight is compared to more lightweight, better heat preservation for existing refractory brick, while ensure that the performance indications such as compressive resistance, refractoriness under load and thermal shock resistance are maintained at outstanding level.

Description

A kind of refractory brick attachment structure

Technical field

The present invention relates to kiln heat-insulation layer technical field, in particular to a kind of refractory brick attachment structure.

Background technology

Electrical kiln is one kind of kiln, and it is used as heating group using electric furnace heating wire, silicon-carbon side or molybdenum disilicide mostly using electricity as the energy Part, oxidizing atmosphere firing is carried out by electric energy radiation and heat conduction principle, and electronic program regulation and control are simple to operate, have a safety feature, fit For various workplaces.

Existing electrical kiln generally piles up the outer wall to be formed as heat-insulation layer using fire resisting station, and thing to be sintered is placed in it and added Heat is fired, and insulation barrier is formed by piling up for cement between refractory brick, but cement easily shrinks after the drying, easily in fire resisting The junction of brick forms gap, causes the heat-insulating property of electrical kiln to decline, the structural strength reduction of insulation barrier.

The content of the invention

In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of refractory brick attachment structure, its good gram The sealing thermal insulation problem that cement shrinkage is brought has been taken, the fastness and stability of attachment structure is in turn ensure that.

A kind of refractory brick attachment structure, including two refractory brick side and be arranged on the connecting portions of two sides；

The side of wherein refractory brick is provided with cement face and the expanded graphite neck adjacent with the cement face, forms heap When building structure, the cement face is located at the outside of furnace insulation layer, and the expanded graphite neck is located at the interior of furnace insulation layer Side；

Connecting portion includes paving the cement connecting layer on the cement face and being connected in the expanded graphite neck Expanded graphite card article.

Expanded graphite can be used for the refractory brick of electrical kiln to seal as exotic material, and it can expand, fill up at high temperature Expanded graphite neck, accordingly even when cement connecting layer causes crack due to heat shrinkable, is maintained to good sealing.

As the preferred of above-mentioned technical proposal, the cement face is plane, itself and the expanded graphite neck it Between be provided with block.

As the preferred of above-mentioned technical proposal, some pits are provided with the cement face.

As the preferred of above-mentioned technical proposal, the quantity of the expanded graphite neck is two, adjacent and parallel setting On the side of refractory brick.

As the preferred of above-mentioned technical proposal, two expanded graphite necks are installed after expanded graphite card article, and centre is deposited In hollow heat-insulation layer.

The attachment structure of the application can use following refractory brick, to strengthen the heat-insulating property of electrical kiln：

The electrical kiln refractory brick of a kind of light thermal-insulation, by fine and close supporting layer and porous heat-insulation layer institute structure combined with it Into；

When piling up electrical kiln, the supporting layer constitutes the outer layer of refractory brick packing structure, and the heat-insulation layer constitutes refractory brick and piles up knot The nexine of structure；

The porosity of the supporting layer is 0% ~ 5%, and the porosity of the heat-insulation layer is 5% ~ 45%.

Air has very low thermal conductivity as the non-conductor of heat, therefore, the hole containing air is formed in refractory brick Gap layer can greatly enhance its heat-insulating property, at the same time, retain supporting layer to provide intensity and the heat resistanceheat resistant required for refractory brick Shock stability, makes it have suitable competitiveness for like product.

As the preferred of above-mentioned technical proposal, the supporting layer is the sintered rear compacted zone formed.

As the preferred of above-mentioned technical proposal, the thickness of the supporting layer accounts for the 18% ~ 22% of the refractory brick thickness.

As the preferred of above-mentioned technical proposal, the heat-insulation layer includes several according to the order of porosity from small to large The minimum layering of layering, wherein porosity is adjacent with the supporting layer.

As the preferred of above-mentioned technical proposal, the quantity of the layering is 2 ~ 4 layers.

As the preferred of above-mentioned technical proposal, the quantity of the layering is 3 layers.

As the preferred of above-mentioned technical proposal, the layering is respectively according to the order apart from the supporting layer from the near to the remote First layer, second layering positioned at centre and away from the supporting layer farthest threeth layering adjacent with the supporting layer；

The porosity of the first layer is 8% ~ 12%, and the porosity of second layering is 15% ~ 20%, the 3rd layering Porosity is 22% ~ 30%.

As the preferred of above-mentioned technical proposal, the thickness of the first layer accounts for the 20% of the insulation layer thickness, described The thickness of two layerings accounts for the 30% of the insulation layer thickness, and the thickness of the first layer accounts for the 50% of the insulation layer thickness.

When preparing the refractory brick, porosity is controlled by adding the quantity of pore creating material in the feed, then will be containing not Adobe with Content of Pore-forming Agents is superimposed and is sintered after mould and pressing, you can obtain refractory brick described herein.

Now provide a refractory brick formula for reference：

As mass fraction, the parts by weight of sillimanite 10~20；The parts by weight of mullite 10~20；The parts by weight of alumina corundum 10 ~ 20； The parts by weight of pink fused alumina 5 ~ 15；The parts by weight of sillimanite micro mist 5 ~ 10；The parts by weight of copper and iron Spinel micropowder 3 ~ 5；Aluminium riched spinel powder 3 ~ 8 Parts by weight；The parts by weight of nickel oxide powder 3~5, the parts by weight of pure calcium aluminate cement 2~5, the weight powder of alumina gel powder 2 ~ 4；Additive 0.35 Parts by weight, pore creating material is added on demand.

The present invention compared with prior art, with advantages below and beneficial effect：

（1）The attachment structure overcomes the sealing thermal insulation problem that cement shrinkage is brought；

（2）The attachment structure ensure that the fastness and stability of attachment structure simultaneously；

（3）The attachment structure is readily produced processing, need to be only improved in firebrick billet mould.

Brief description of the drawings

Fig. 1 is refractory brick side structure schematic diagram.

Fig. 2 is attachment structure schematic diagram.

Fig. 3 is the electrical kiln firebrick structure schematic diagram of light thermal-insulation.

In figure：Supporting layer a1, heat-insulation layer a2, first layer a21, the second layering a22, the 3rd layering a23, cement face B1, block b11, pit b12, expanded graphite neck b2, cement connecting layer b3, expanded graphite card article b4, heat-insulation layer b5.

Embodiment

The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings：

Embodiment 1：With reference to Fig. 1 and Fig. 2, a kind of refractory brick attachment structure, including two refractory brick side and be arranged on two The connecting portion of side；

The side of wherein refractory brick is provided with the cement face b1 of plane and two expansions adjacent with the cement face b1 Some pit b12 are provided with graphite neck b2, cement face b1, are set between cement face b1 and the expanded graphite neck b2 Block b11 is equipped with, when forming packing structure, the cement face b1 is located at the outside of furnace insulation layer, the expanded graphite card Groove b2 is located at the inner side of furnace insulation layer；

Connecting portion includes paving the cement connecting layer b3 on the cement face b1 and is connected to the expanded graphite neck There is hollow heat-insulation layer b5 in the middle of expanded graphite card article b4, two expanded graphite card article b4 in b2.

Embodiment 2：With reference to Fig. 1 and Fig. 2, a kind of refractory brick attachment structure is with the difference of embodiment 1：Expansion Graphite neck b2 quantity is one, and without heat-insulation layer b5.

Embodiment 3：With reference to Fig. 3, the electrical kiln refractory brick of a kind of light thermal-insulation, by supporting layer a1 and combined with it many The heat-insulation layer a2 in hole is constituted；

The supporting layer a1 is compacted zone, and its thickness accounts for the 18% of the refractory brick thickness；

The heat-insulation layer a2 includes the first layer a21 adjacent with the supporting layer a1, positioned at the second middle layering a22 and Porosity away from the 3rd farthest supporting layer a1 layering a23, the first layer a21 is 12%, the second layering a22 Porosity be 20%, it is described 3rd layering a23 porosity be 30%；

The thickness of the first layer a21 accounts for the 20% of the heat-insulation layer a2 thickness, and the thickness of the second layering a22 accounts for described The 30% of heat-insulation layer a2 thickness, the thickness of the first layer a23 accounts for the 50% of the heat-insulation layer a3 thickness

When piling up electrical kiln, the supporting layer a1 constitutes the outer layer of refractory brick packing structure, and the heat-insulation layer a2 constitutes refractory brick heap Build the nexine of structure.

Embodiment 4：With reference to Fig. 3, it is with the difference of embodiment 3：The thickness of the supporting layer a1 accounts for the fire resisting The 22% of brick thickness, the porosity of the first layer a21 is 8%%, and the porosity of the second layering a22 is 15%%, described the Three layering a23 porosity is 22%.

Embodiment 5：With reference to Fig. 3, it is with the difference of embodiment 3：The heat-insulation layer a2 includes 4 layerings, presses Range is from supporting layer a1 by being respectively 5%, 15%, 30% and 45% closely to remote porosity, and its thickness is impartial.

Embodiment 6：With reference to Fig. 3, it is with the difference of embodiment 3：The porosity of the supporting layer a1 is 5%, described Heat-insulation layer a2 includes 2 layerings, according to apart from supporting layer a1, by being respectively 10% and 25% closely to remote porosity, its thickness is equal Deng.

Table one is refractory brick performance parameter described in 3 ~ embodiment of embodiment 6.

Refractory brick performance parameter prepared by the 3 ~ embodiment of embodiment 6 of table one

The weight of refractory brick of the present invention will mitigate 15% ~ 30% compared to existing solid refractory brick, alleviate cost of transportation； Heat-insulating property is more preferably, it is possible to decrease electrical kiln heats energy consumption more than 12%；Meanwhile, it is used as refractory brick, its compressive resistance, loading softening temperature The performance indications such as degree and thermal shock resistance also maintain outstanding level.

Claims

1. a kind of refractory brick attachment structure, it is characterised in that：Side including two refractory brick and the company for being arranged on two sides Socket part；

The side of wherein refractory brick is provided with cement face（b1）And with the cement face（b1）Adjacent expanded graphite card Groove（b2）, when forming packing structure, the cement face（b1）Positioned at the outside of furnace insulation layer, the expanded graphite neck （b2）Positioned at the inner side of furnace insulation layer；

Connecting portion includes paving in the cement face（b1）On cement connecting layer（b3）And it is connected to the expanded graphite Neck（b2）Interior expanded graphite card article（b4）.

2. a kind of refractory brick attachment structure according to claim 1, it is characterised in that：The cement face（b1）For one Plane, itself and the expanded graphite neck（b2）Between be provided with block（b11）.

3. a kind of refractory brick attachment structure according to claim 2, it is characterised in that：The cement face（b1）It is upper to set There are some pits（b12）.

4. a kind of refractory brick attachment structure according to claim 1, it is characterised in that：The expanded graphite neck（b2）'s Quantity is two, and adjacent and parallel is arranged on the side of refractory brick.

5. a kind of refractory brick attachment structure according to claim 4, it is characterised in that：Two expanded graphite necks （b2）Expanded graphite card article is installed（b4）Afterwards, there is hollow heat-insulation layer in centre（b5）.