CN103803999A - Casting material for 5000D/T kilneye - Google Patents

Abstract

The invention discloses a casting material for a 5000D/T kilneye, belonging to the field of refractory materials. The casting material for the 5000D/T kilneye comprises the following components in percentage by weight: 15-25% of mullite, 10-20% of sillimanite, 25-30% of tabular corundum, 5-10% of strontium titanate powder, 5-8% of zirconium oxide powder, 1-3% of silicon metal powder, 3-5% of boron nitride, 5-10% of alumina micro powder, 4-6% of pure calcium aluminate cement, 0.2% of polylactic acid fiber and additive sodium hexametaphosphate occupying 0.1% of the total weight of the components. According to the casting material for the 5000D/T kilneye, the thermal shock resistance, high temperature resistance, volume stability and abrasion resistance of the material are improved; and the casting material for the 5000D/T kilneye has high strength, so that the defects such as bad abrasion resistance, bad thermal shock property and the like are improved, and the service life of the cement kilineye is prolonged from about ten months to more than two years.

Description

A kind of 5000D/T Special castable for kiln outlet

Technical field

The present invention relates to building materials and use high-temperature material field, be specifically related to a kind of cement kiln outlet dedicated pouring material.

Background technology

Rapidly, within 2013, cement production capacity has broken through 2,100,000,000 tons in China's new type nonaqueous cement production line development at present, and cement production capacity is seriously superfluous.Therefore, how cement company boosts productivity, and generating profit maximization is the only way of market competition.The operation factor that improves cement producing line is to improve cement kiln production efficiency, the essential condition of earning economic benefit.But because cement kiln bears higher temperature, violent temperature variation, strong chemical erosion and the effect of harsh mechanical stress, new type nonaqueous cement production line needs the refractory materials of excellent properties more.

The kilneye working conditions of cement kiln is severe, except being subject to up to 1300-1400 ℃ of high temperature, also bear the impact of the secondary air thermal stresses and the rotary kiln rotary machine stress etc. that cause that cement kiln clinker continuous discharge and grate-cooler come, and the life-span of cement kilneye is on there being conclusive impact the running period of whole production line.Thereby the mould material that cement kilneye is used is had higher requirement: high-wearing feature, highly heatproof and shockproof and high strength.Kilneye mould material develops into add by the high-strength mould material of traditional high alumina the low cement deposit material of high-performance that super-fine powder and high efficiency water reducing agent are feature, existing corundum-spinel castable (as patent CN101407424A), the low cement deposit materials such as corundum-mullite mould material (as patent CN101445379B), although improved the overall use properties of mould material, make the extending to about 10 months for 4-6 month by traditional high-strength mould material of use high alumina in work-ing life of kilneye, extend the cement kiln outlet life-span, but still can not meet customer need, special in the more severe cement kiln of some environments for use, current kilneye mould material is not wear-resisting, easily peel off, seriously restrict the raising of cement kiln production line rate, affect the economic benefit of the cement producer that knows clearly.

Summary of the invention

The object of the invention is effectively to improve the not wear-resisting of kilneye, falls the generation of the phenomenons such as piece, provides one to have resistance to

High temperature, wear-resisting, acid and alkali-resistance, high-strength, anti-thermal shock, can extend the cement kiln outlet Special castable for kiln outlet in work-ing life greatly.

Above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of 5000D/T Special castable for kiln outlet, and the component that it comprises following weight percentage:

Mullite 15-25%

Sillimanite 10-20%

Plate diamond spar 25-30%

Strontium titanate powder 5-10%

Zirconia powder 5-8%

Metallic silicon power 1-3%

Boron nitride 3-5%

Alumina powder 5-10%

Pure calcium aluminate cement 4-6%

Acid fiber by polylactic 0.2%

Sodium hexametaphosphate 99 is admixture, and add-on accounts for said components gross weight 0.1%.

As an optimal way of the present invention, the weight percentage of the contained component of described Special castable for kiln outlet is:

Mullite 15-25%

Sillimanite 10-20%

Plate diamond spar 25-30%

Strontium titanate powder 5-10%

Zirconia powder 5-8%

Metallic silicon power 1-3%

Boron nitride 3-5%

Alumina powder 5-10%

Pure calcium aluminate cement 4-6%

Acid fiber by polylactic 0.2%

Sodium hexametaphosphate 99 is admixture, and add-on accounts for said components gross weight 0.1%.

As another optimal way of the present invention, the weight percentage of the contained component of described Special castable for kiln outlet is:

Mullite 15-20%

Sillimanite 15-20%

Plate diamond spar 25-30%

Strontium titanate powder 8-10%

Zirconia powder 6-8%

Metallic silicon power 3%

Boron nitride 5%

Alumina powder 6-8%

Pure calcium aluminate cement 6%

Acid fiber by polylactic 0.2%

Sodium hexametaphosphate 99 is admixture, and add-on accounts for said components gross weight 0.1%.

The technical indicator of 5000D/T Special castable for kiln outlet of the present invention is as follows:

In sum, the present invention compared with prior art, mould material of the present invention consists of microdilatancy mould material by materials such as mullite, sillimanite, plate diamond spar, strontium titanate powder, zirconia powder, alumina powders, be conducive to reduce material internal stress at high temperature, heat-shock resistance, high thermal resistance, volume stability and the wear resistance of material are improved, and there is high strength, improve the not wear-resisting of kilneye, the defects such as thermal shock resistance is poor, make work-ing life of cement kiln outlet to bring up to 2 years by existing about 10 months and more than.

Embodiment

Below in conjunction with embodiment, the present invention is described in further detail.This specific embodiment is only to solution of the present invention

Release, it is not the restriction to invention, and those skilled in the art are read can be as required to this enforcement after this specification sheets

Example is made any modification, but as long as within the scope of claim of the present invention, is all subject to the protection of patent law.

Embodiment 1

A kind of 5000D/T Special castable for kiln outlet, the weight percentage of its contained component is:

Mullite 25%

Sillimanite 20%

Plate diamond spar 25%

Strontium titanate powder 8%

Zirconia powder 5%

Metallic silicon power 1%

Boron nitride 1%

Alumina powder 15%

Pure calcium aluminate cement 6%

Acid fiber by polylactic 0.2%

Sodium hexametaphosphate 99 is admixture, and add-on accounts for said components gross weight 0.1%.

Embodiment 2

A kind of 5000D/T Special castable for kiln outlet, the weight percentage of its contained component is:

Mullite 25%

Sillimanite 20%

Plate diamond spar 30%

Strontium titanate powder 8%

Zirconia powder 8%

Metallic silicon power 1.5%

Boron nitride 5%

Alumina powder 5%

Pure calcium aluminate cement 3%

Acid fiber by polylactic 0.2%

Sodium hexametaphosphate 99 is admixture, and add-on accounts for said components gross weight 0.1%.

Embodiment 3

A kind of 5000D/T Special castable for kiln outlet, the weight percentage of its contained component is:

Mullite 20%

Sillimanite 20%

Plate diamond spar 25%

Strontium titanate powder 10%

Zirconia powder 8%

Metallic silicon power 5%

Boron nitride 3%

Alumina powder 5%

Pure calcium aluminate cement 3.5%

Acid fiber by polylactic 0.2%

Sodium hexametaphosphate 99 is admixture, and add-on accounts for said components gross weight 0.1%.

In above-described embodiment, each component used is to well known to a person skilled in the art product, on market, all can buy

Arrive, wherein boron nitride, the interpolation of corundum, is conducive to the wear resistance of mould material; Sillimanite has micro-expansibility; Strontium titanate, zirconium white is for improving the heat-shock resistance of mould material, guarantee its high volume stability, avoid the phenomenons such as mould material ftractures, drops, add metallic silicon power, alumina powder simultaneously, greatly improved the over-all properties of mould material, make work-ing life of mould material can extend to 2 years and more than.

The 5000D/T Special castable for kiln outlet of above-described embodiment 1-3 is prepared by the following method: by each component and admixture mix and blend

Evenly, then add appropriate water mixing strong stirring even, more then moulding is used after conventional maintenance and baking.

The physical index of above-described embodiment 1-3 relatively sees the following form:

Claims (1)

1. a 5000D/T Special castable for kiln outlet, is characterized in that, the weight percentage of its contained component is:

Mullite 15-25%

Sillimanite 10-20%

Plate diamond spar 25-30%

Strontium titanate powder 5-10%

Zirconia powder 5-8%

Metallic silicon power 1-3%

Boron nitride 3-5%

Alumina powder 5-10%

Pure calcium aluminate cement 4-6%

Acid fiber by polylactic 0.2%

Sodium hexametaphosphate 99 is admixture, and add-on accounts for said components gross weight 0.1%.