CN105884266A

CN105884266A - Large electrically-fused brick sand mold coating

Info

Publication number: CN105884266A
Application number: CN201610209022.8A
Authority: CN
Inventors: 龙沾卫
Original assignee: Zhengzhou Yuandong Refractory Co Ltd
Current assignee: Zhengzhou Yuandong Refractory Co Ltd
Priority date: 2016-04-06
Filing date: 2016-04-06
Publication date: 2016-08-24
Anticipated expiration: 2036-04-06
Also published as: CN105884266B

Abstract

The invention relates to a large electrically-fused brick sand mold coating which can effectively solve the problems that after casting molding of an electrically-fused brick is completed, dark bluish grey deposited carbon exists on the surface of a brick body, a sand mold sticks to the surface of the brick body, and the cost is high. According to the technical scheme, the large electrically-fused brick sand mold coating comprises, by weight, 64%-68% of mixed coating and 32%-36% of water, wherein the mixed coating is prepared from, by weight, 53%-57% of zircon sand, 31%-35% of silicon powder, 2.3%-2.7% of cryolite, 2.3%-2.7% of iron oxide powder, 2.8%-3.2% of bentonite and 3.8%-4.2% of xanthan gum. A particular preparation method of the large electrically-fused brick sand mold coating comprises the steps that zircon sand, silicon powder, cryolite, iron oxide powder, bentonite and xanthan gum are mixed together, and the mixed coating is obtained; the mixed coating is added into water, the materials are mixed to be uniform, and the large electrically-fused brick sand mold coating is obtained. According to the large electrically-fused brick sand mold coating, the formula is reasonable, the phenomena that dark bluish grey deposited carbon pores are formed in the surface of the electrically-fused brick subjected to casting molding, and the sand mold sticks to the surface of the brick body are effectively solved, the production cost of the coating is greatly reduced, and good social and economic benefits are achieved.

Description

A kind of large-scale fused cast refractories mo(u)ld blacking

Technical field

The present invention relates to Corhart Zac-block mo(u)ld blacking, a kind of large-scale fused cast refractories mo(u)ld blacking.

Background technology

Conventional more than 20 years fused cast refractories produce in, casting sand mold raw material be silica sand add 8% to 10% waterglass be bonding agent Making, this sand mold drawback is: 1, can only make sand plate and fall apart assembled shaping, sand mold regularity is poor；2,16 hours left sides are needed Right drying procedure, production efficiency is the lowest；3, under silica sand high temperature again, the coefficient of expansion is high, and negative effect is played in the shaping to fused cast refractories. But have individual advantage precisely due to degree of drying is good, the low skin color not endangering brick of gas forming amount and brick surface pores little.Due to silicon Sand adds the drawback of water-glass sand type and has been more than favourable composition, and a lot of high-end fused cast refractories manufacturers have eliminated silica sand and added the sand of waterglass Type, uses furan resin-sand sand mold, and Castings Produce with Furan Resin is resin meeting decomposition combustion under the condition of high temperature that fused cast refractories is cast, including After the resin decomposition of the grains of sand, sand mold will be the most defeated and dispersed, although brick body forms help, but resin burning can discharge dioxy Changing carbon gas and nitrogen gas, these gases can make brick surface produce a large amount of pore of steel gray color of carbon distribution, in order to avoid these Drawback, needs to isolate, at mould surface daub, the Substances Pollution brick face that resin sand decomposes out.

Large-scale fused cast refractories that former waterglass sand mold the makes Corhart Zac-block of 1 ton-2.5 tons (the brick body weight be), due to The volume of brick is big, and amount of stored heat is big, and therefore the sand mold high-temperature time duration is the longest, and silica sand has large area bonding brick face serious, clearly Reason difficulty.Therefore, the way taked at present is typically to smear the painting that a layer thickness is more than 2mm on the inwall of fused cast refractories sand mold The bed of material, this coating is typically with zirconium English powder, water and glue and mixes and make, but this method yet suffers from drawback, 1, Brick face still has grey cyan carbon distribution cavitations local to present.2, there is the phenomenon in sand mold bonding brick face, especially at the inner corner trim of brick body Place is difficult to clear up；3, zircon sand fusing point 2340 DEG C to about 2550 DEG C, are milled into the market price 16000 yuan of left sides per ton of zirconium English powder The right side, fused cast refractories cast temperature is about 1800 DEG C, although zirconium English powder is excellent as resin sand sand mo(u)ld coating, but its Costco Wholesale The highest, the burden bringing cost to enterprise is the heaviest.Therefore, the improvement of coating and innovate imperative.

Summary of the invention

For above-mentioned situation, for overcoming the defect of prior art, the purpose of the present invention is just to provide a kind of large-scale fused cast refractories sand mold and is coated with Material, after can effectively solving fused cast refractories cast molding there is ash cyan carbon distribution, sand mold bonding brick body surface in brick body surface, and cost is high Problem.

The technical scheme that the present invention solves is, a kind of large-scale fused cast refractories mo(u)ld blacking, including the component of percentage by weight meter: mixing Coating 64-68%, water 32-36%；Wherein, described compo includes the component of percentage by weight meter: zircon sand 53-57%, Cab-O-sil 31-35%, ice crystal 2.3-2.7%, brown iron oxide 2.3-2.7%, bentonite 2.8-3.2%, xanthans 3.8-4.2%； The concrete preparation method of described large-scale fused cast refractories mo(u)ld blacking is: by zircon sand, Cab-O-sil, ice crystal, brown iron oxide, swelling Soil and xanthans mix, and obtain compo, then are added to the water by compo and mix, and to obtain final product.

Formulation for coating material of the present invention is reasonable, ice crystal (Na₃AIF₆) as carbon adsorbent, can at high temperature be formed activity NaF, AIF₃Deng material, the carbon decompositing sand mold produces suction-operated, is allowed to not be deposited in brick body surface, thus prevents brick body surface The generation of carbon distribution and the generation of nitrogen pore, additionally, also mix brown iron oxide (Fe in coating₂O₃), it is possible to increase the stripping certainly of coating From ability and anti-nitrogen pore ability, make brick body any surface finish, effectively prevent the generation of sand mold bonding brick body superficial phenomenon, and Improve dimensional accuracy to a certain extent；Bentonitic addition makes that the coating of preparation is easy to apply, does not ftractures and viscous consistency, reduces The working strength of sand removal and working time.Coating of the present invention easily produces, and efficiently solves the fused cast refractories surface ash after cast molding blue or green Look carbon distribution cavitations and sand mold bonding brick body superficial phenomenon, and greatly reduce the production cost of coating, there is good society And economic benefit.

Detailed description of the invention

Below in conjunction with embodiment, the detailed description of the invention of the present invention is described in further detail.

Embodiment 1

The large-scale fused cast refractories mo(u)ld blacking of the present embodiment, including the component of percentage by weight meter: compo 64%, water 36%； Wherein, described compo includes the component of percentage by weight meter: zircon sand 53%, Cab-O-sil 35%, ice crystal 2.3%, Brown iron oxide 2.7%, bentonite 2.8%, xanthans 4.2%；The concrete preparation method of described large-scale fused cast refractories mo(u)ld blacking is: Zircon sand, Cab-O-sil, ice crystal, brown iron oxide, bentonite and xanthans are mixed, obtains compo, then will Compo is added to the water and mixes, and to obtain final product.

Embodiment 2

The large-scale fused cast refractories mo(u)ld blacking of the present embodiment, including the component of percentage by weight meter: compo 66%, water 34%； Wherein, described compo includes the component of percentage by weight meter: zircon sand 55%, Cab-O-sil 33%, ice crystal 2.5%, Brown iron oxide 2.5%, bentonite 3%, xanthans 4%；The concrete preparation method of described large-scale fused cast refractories mo(u)ld blacking is: by zirconium Sand, Cab-O-sil, ice crystal, brown iron oxide, bentonite and xanthans mix, and obtain compo, then will mixing Coating is added to the water and mixes, and to obtain final product.

Embodiment 3

The large-scale fused cast refractories mo(u)ld blacking of the present embodiment, including the component of percentage by weight meter: compo 68%, water 32%； Wherein, described compo includes the component of percentage by weight meter: zircon sand 57%, Cab-O-sil 31%, ice crystal 2.7%, Brown iron oxide 2.3%, bentonite 3.2%, xanthans 3.8%；The concrete preparation method of described large-scale fused cast refractories mo(u)ld blacking is: Zircon sand, Cab-O-sil, ice crystal, brown iron oxide, bentonite and xanthans are mixed, obtains compo, then will Compo is added to the water and mixes, and to obtain final product.

Coating of the present invention through test of many times all obtained same or like as result, be below under the same terms produce same specification electricity The contrast situation of molten brick:

Test group and each 20 pieces of the fused cast refractories that the equal production specification of control group is 1 ton, 1.5 tons and 2 tons, test group and control group are adopted With casting liquid, incubator and the working condition of same recipe, only difference is that topcoating in the brick body sand mold of test group is this The coating of invention, what control group was coated with is to use traditional coating, by the component of percentage by weight meter: compo 66%, water 34% Making, compo is by the component of percentage by weight meter: zircon sand 91%, clay 4%, white glue with vinyl 5% are made, wherein, Zircon sand, clay and white glue with vinyl are mixed, obtain compo, then compo is added to the water, to obtain final product), specifically Operation is after sand mold completes, at sand mold inwall brushing paint, will be coating uniform stirring before brushing, and painting tool uses Hairbrush operates, brushing thickness 2mm to be, brushing will through twice brushing, keep sand mold inwall smooth/no concave-convex phenomenon, Sand mold after brushing carried out casting after three days and uses, and was the process that distributes of a moisture during this, the brick body after cast molding Situation contrast is as follows:

By above-mentioned situation it should be apparent that use the large-scale fused cast refractories brick body surface ash cyan carbon distribution gas of coating material production of the present invention Phenomenon and sand mold glue brick body phenomenon and are effectively controlled, thus are effectively increased sand removal operating efficiency, and operating efficiency improves octuple, Coating cost is only 1/4th of former coating cost simultaneously, and other item indexs of brick body all do not decline the most after testing, economic effect Benefit is notable.

Claims

1. one kind large-scale fused cast refractories mo(u)ld blacking, it is characterised in that include the component of percentage by weight meter: compo 64-68%, Water 32-36%；Wherein, described compo includes the component of percentage by weight meter: zircon sand 53-57%, Cab-O-sil 31-35%, Ice crystal 2.3-2.7%, brown iron oxide 2.3-2.7%, bentonite 2.8-3.2%, xanthans 3.8-4.2%；Described large-scale fused cast refractories The concrete preparation method of mo(u)ld blacking is: zircon sand, Cab-O-sil, ice crystal, brown iron oxide, bentonite and xanthans are mixed Together, obtain compo, then compo is added to the water mixes, to obtain final product.

Large-scale fused cast refractories mo(u)ld blacking the most according to claim 1, it is characterised in that include the group of percentage by weight meter Point: compo 64%, water 36%；Wherein, described compo includes the component of percentage by weight meter: zircon sand 53%, Cab-O-sil 35%, ice crystal 2.3%, brown iron oxide 2.7%, bentonite 2.8%, xanthans 4.2%；Described large-scale fused cast refractories sand The concrete preparation method of type coating is: zircon sand, Cab-O-sil, ice crystal, brown iron oxide, bentonite and xanthans are blended in Together, obtain compo, then compo is added to the water mixes, to obtain final product.

Large-scale fused cast refractories mo(u)ld blacking the most according to claim 1, it is characterised in that include the group of percentage by weight meter Point: compo 66%, water 34%；Wherein, described compo includes the component of percentage by weight meter: zircon sand 55%, Cab-O-sil 33%, ice crystal 2.5%, brown iron oxide 2.5%, bentonite 3%, xanthans 4%；Described large-scale fused cast refractories sand mold The concrete preparation method of coating is: zircon sand, Cab-O-sil, ice crystal, brown iron oxide, bentonite and xanthans are blended in one Rise, obtain compo, then compo is added to the water mixes, to obtain final product.

Large-scale fused cast refractories mo(u)ld blacking the most according to claim 1, it is characterised in that include the group of percentage by weight meter Point: compo 68%, water 32%；Wherein, described compo includes the component of percentage by weight meter: zircon sand 57%, Cab-O-sil 31%, ice crystal 2.7%, brown iron oxide 2.3%, bentonite 3.2%, xanthans 3.8%；Described large-scale fused cast refractories sand The concrete preparation method of type coating is: zircon sand, Cab-O-sil, ice crystal, brown iron oxide, bentonite and xanthans are blended in Together, obtain compo, then compo is added to the water mixes, to obtain final product.