阅读说明：本技术 一种水泥回转窑用硅莫砖及其制备方法 (A kind of cement rotary kiln siliceous mullite brick and preparation method thereof ) 是由 袁林 王旭圆 李炜 李祥 李泉侑 王强 赵屹 宋瑞峰 孟凌霄 于 2019-09-04 设计创作，主要内容包括：本发明涉及一种水泥回转窑用硅莫砖及其制备方法,浇注料由矾土、白刚玉、氧氮化硅、α-Al<Sub>2</Sub>O<Sub>3</Sub>、金属硅粉、抗氧化剂、添加剂和结合剂原料制成,本发明在实用时,接缝处砌装更加严密,相互之间连接牢靠,受力一体,承重能力强,内有空腔,自重小,保证实用寿命；水泥回转窑过渡带砖两侧第一耐温层和第二耐温层耐热材料,利用氧氮化硅具有很好的热震稳定性和水泥料和盐的侵蚀性能的特点,同时利用熔融的SiO<Sub>2</Sub>和硅酸盐以及熔融的A1和Cu等非铁金属对氧氮化硅陶瓷不浸润的原理,该砖制得的水泥回转窑过渡带砖不挂窑皮；在第一耐温层和第二耐温层中间采用带有隔热空腔的隔热层,隔热能力强,导热系数小,避免窑筒体温度偏高,能耗小,降低水泥窑成本。(The present invention relates to a kind of cement rotary kiln siliceous mullite bricks and preparation method thereof, and castable is by alumina, white fused alumina, silicon oxynitride, α-Al 2 O 3 , metallic silicon power, antioxidant, additive and bonding agent raw material be made, for the present invention when practical, seam crossing builds that dress is tighter, and it is firm to connect between each other, and stress one, load-bearing capacity is strong, inside there is cavity, is self-possessed small, guarantees physical life；The first heat-resistant layer of cement rotary kiln transition belt brick two sides and the second heat-resistant layer heat proof material have the characteristics that the erosion performance of good thermal shock resistance and cement material and salt using silicon oxynitride, while utilizing the SiO of melting 2 With the nonferrous metal such as silicate and the A1 and Cu of melting to the nonwettable principle of silicon oxynitride ceramics, cement rotary kiln transition belt brick made from the brick does not hang kliner coating；Using the thermal insulation layer with insulated cavity among the first heat-resistant layer and the second heat-resistant layer, heat-insulating capability is strong, and thermal coefficient is small, avoids kiln cylinder body temperature drift, and energy consumption is small, reduces cement kiln cost.)

It mainly include thermal insulation layer (1), the first heat-resistant layer (3) and the second heat-resistant layer (4) 1. a kind of cement rotary kiln siliceous mullite brick, It is opened it is characterized in that, offering perforative cavity (5), cavity (5) rear and front end side wall up and down in the middle part of the thermal insulation layer (1) Tenon slot equipped with equidistant arrangement；First heat-resistant layer (3) front side wall is extended forward the first tenon for having equidistant arrangement (2), the first tenon (2) is sliding via tenon slot and thermal insulation layer (1), after the first heat-resistant layer (3) front side wall and thermal insulation layer (1) Side wall is in close contact, and the first heat-resistant layer (3) right end lower rightward, which is extended, to be had the first deck (10), the first deck (10) Top offers the first card slot (11), and the first heat-resistant layer (3) left end lower part extends downward with the first clamp (14)；Institute It states the second heat-resistant layer (4) rear wall and extends back and be provided with the second tenon (6) of equidistant arrangement, the second tenon (6) is via tenon Slot and thermal insulation layer (1) are sliding, and the second heat-resistant layer (4) rear wall and thermal insulation layer (1) front side wall are in close contact, and described second is resistance to Warm layer (4) right end lower rightward, which is extended, to be had the second deck (9), and the second deck (9) top offers the second card slot (8), institute It states the second heat-resistant layer (4) left end lower part to extend downward with the second clamp (13), the thermal insulation layer (1), the first heat-resistant layer (3) It is clamped with the second heat-resistant layer (4) and constitutes main body, main body upper and lower ends are fixedly installed with top asbestos layer (7) and bottom asbestos layer (12).

2. a kind of transition band of cement kiln siliceous mullite brick as described in claim 1, it is characterised in that: the cement rotary kiln silicon Brick is not made of the raw material of following weight percentage: being made of the raw material of following weight percentage: alumina 45~65%, white fused alumina Powder 5-10%, α-Al₂O₃Micro mist 2~10%, silicon oxynitride 5~20%, antioxidant 1~3%, additive 1~10% and combination Agent 2~6%.

3. a kind of transition band of cement kiln siliceous mullite brick as claimed in claim 2, it is characterised in that: the additive is red column Stone, the antioxidant are metallic silicon power, and the bonding agent is spent pulping liquor.

4. a kind of transition band of cement kiln siliceous mullite brick as claimed in claim 2, it is characterised in that: the Al of the alumina₂O₃Content >=88%, alumina includes 5~3mm, 3~1mm, 1~0mm, tri- kinds of grain compositions, and the alumina of 5~3mm accounts for the 15 of raw material gross weight The alumina of~20%, 3~1mm account for the 20~25% of raw material gross weight, and the alumina of 1~0mm accounts for the 15~20% of raw material gross weight, The Al of the white fused alumina₂O₃Content >=99%, granularity are 200 mesh.

5. a kind of preparation method of cement rotary kiln siliceous mullite brick as described in claim 1-4 is any, which is characterized in that including Following steps:

A, alumina, white fused alumina, silicon oxynitride, α-Al are taken₂O₃Micro mist, metallic silicon power, antioxidant, additive and bonding agent, it is standby With；

B, alumina is worn into fine powder, is classified three kinds of varigrained particulate materials, it is spare；White fused alumina is worn into 200 mesh fine powders, it is standby With；Silicon oxynitride is worn into 320 targeted fine powders, it is spare；

C, take by weight percentage: the alumina 15~20% of 5~3mm, the alumina 20~25% of 3~1mm, 1~0mm alumina 15 White fused alumina 5~15%, silicon oxynitride 5~20%, the α-Al of~20%, 200 mesh₂O₃Micro mist 2~10%, antioxidant 1~3%, Above-mentioned raw materials are added blender, obtain dry blend after stirring 3~5min, dry blend weight is then added by additive 1~10% The bonding agent of percentage 3~5%, then stirs 10min, obtains the first heat-resistant layer (3) and the second heat-resistant layer (4) pre- binder.

D, take by weight percentage: the alumina 20~25% of 5~3mm, the alumina 25~30% of 3~1mm, 1~0mm alumina 20 Blender is added, after stirring 3~5min in above-mentioned raw materials by white fused alumina 10~20%, the additive 1~10% of~25%, 200 mesh Dry blend is obtained, the bonding agent of dry blend weight percent 3~5% is then added, then stirs 10min, obtains thermal insulation layer (1) Pre- binder.

E, the first heat-resistant layer (3) and the pre- binder of the second heat-resistant layer (4) will be obtained and thermal insulation layer (1) pre- binder passes through die for special purpose respectively Tool is pressed into preset shapes, and the first heat-resistant layer (3) and the second heat-resistant layer (4) and thermal insulation layer (1) are connected together later, then passes through Bonding agent attaches top asbestos layer (7) and bottom asbestos layer (12) in upper and lower ends, then carries out pre-molding, obtain siliceous mullite brick partly at Product.

F, semi-finished product are obtained into siliceous mullite brick finished product after 1400 DEG C of firings.

6. a kind of preparation method of cement rotary kiln transition belt novel fire-resistant lining brick as claimed in claim 5, feature exist In in the step b), the alumina wears into fine powder, is classified into 5~3mm, 3~1mm and 1~0mm tri- kinds varigrained Grain raw material.

Technical field

The present invention relates to technical field of refractory materials, and in particular to a kind of cement rotary kiln siliceous mullite brick and its preparation side Method.

Background technique

In early days, transition band of cement kiln working lining once used peroxophosphoric acid block salt, peeling-resistant antiwear brick until current siliceous mullite brick. Current siliceous mullite brick is mainly bonding agent using bauxite chamotte, high-quality silicon carbide as raw material, syrup, and thermal shock performance is unstable, Oxide layer is deeper after firing.Transition band of cement kiln pair kliner coating frequently falls off, and temperature change is big, and chemical erosion is serious, refractory brick pole It easily bursts peeling and is damaged by ablation.

Therefore the thermal shock resistance of siliceous mullite brick is particularly important.With cement rotary kiln technological progress, to enlargement, Gao Fenggao Pressureization direction is developed, and kiln speed is accelerated, and expects increased flow capacity, and temperature rises, and leads to go out at present cement rotary kiln siliceous mullite brick and uses the longevity Life is severely impacted.

Existing cement rotary kiln is poor with siliceous mullite brick stability, in the later period in use, from great, be easy to cause kiln body load-bearing Scarce capacity influences physical life；And thermal stability is poor, the scarce capacity of resistance to cement material and salt corrosion performance；Cement rotary kiln Intermediate zone brick kliner coating easy to hang, kliner coating frequently fall off the damage of brick caused by causing temperature change, reduce the cement kiln service life.

Summary of the invention

The purpose of the present invention is deficiency to solve above-mentioned technical problem, provide a kind of cement rotary kiln siliceous mullite brick and its Preparation method, anti-stripping lower using rotary kiln transition belt refractory lining good thermal shock stability, rate of depreciation made from the siliceous mullite brick It is good to fall performance.Cement kiln production capacity can be significantly improved, making cement rotary kiln, the service life is longer.

The present invention is in order to solve the above technical problems, provided technical solution is: a kind of cement rotary kiln siliceous mullite brick, main To include thermal insulation layer, the first heat-resistant layer and the second heat-resistant layer, perforative cavity up and down, the sky are offered in the middle part of the thermal insulation layer Chamber rear and front end side wall offers the tenon slot of equidistant arrangement；The first heat-resistant layer front side wall, which is extended forward, equidistant row First tenon of column, the first tenon is sliding via tenon slot and thermal insulation layer, on rear side of the first heat-resistant layer front side wall and thermal insulation layer Wall is in close contact, and the first heat-resistant layer right end lower rightward, which is extended, the first deck, and the first deck top offers the One card slot, first heat-resistant layer left end lower part extend downward with the first clamp；The second heat-resistant layer rear wall is backward It is extended the second tenon for having equidistant arrangement, the second tenon is sliding via tenon slot and thermal insulation layer, after second heat-resistant layer Side wall and thermal insulation layer front side wall are in close contact, and the second heat-resistant layer right end lower rightward, which is extended, the second deck, and second Deck top offers the second card slot, and second heat-resistant layer left end lower part extends downward with the second clamp, described heat-insulated Layer, the first heat-resistant layer and the clamping of the second heat-resistant layer constitute main body, and main body upper and lower ends are fixedly installed with top asbestos layer and bedstone cotton Layer.

As a further solution of the present invention: the cement rotary kiln siliceous mullite brick by following weight percentage raw material system At: it is made of the raw material of following weight percentage: alumina 45~65%, white alundum powder 5-10%, α-Al₂O₃Micro mist 2~10%, Silicon oxynitride 5~20%, antioxidant 1~3%, additive 1~10% and bonding agent 2~6%；

As further scheme of the invention: the additive is andalusite.

As further scheme of the invention: the antioxidant is metallic silicon power.

As further scheme of the invention: the bonding agent is spent pulping liquor.

As further scheme of the invention: the Al of the alumina₂O₃Content >=88%, alumina include 5~3mm, 3~ 1mm, 1~0mm, tri- kinds of grain compositions, the alumina of 5~3mm account for the 15~20% of raw material gross weight, and the alumina of 3~1mm accounts for raw material The 20~25% of total weight, the alumina of 1~0mm account for the 15~20% of raw material gross weight.

As further scheme of the invention: the Al of the white fused alumina₂O₃Content >=99%, granularity are 200 mesh.

A kind of preparation method of cement rotary kiln siliceous mullite brick, comprising the following steps:

A, alumina, white fused alumina, silicon oxynitride, α-Al are taken₂O₃Micro mist, metallic silicon power, antioxidant, additive and bonding agent, It is spare；

B, alumina is worn into fine powder, is classified into 5~3mm, 3~1mm and 1~0mm, tri- kinds of varigrained particulate materials, it is standby With；White fused alumina is worn into 200 mesh fine powders, it is spare；Silicon oxynitride is worn into 320 targeted fine powders, it is spare；

C, take by weight percentage: the alumina 15~20% of 5~3mm, the alumina 20~25% of 3~1mm, 1~0mm alum White fused alumina 5~15%, silicon oxynitride 5~20%, the α-Al of native 15~20%, 200 mesh₂O₃Micro mist 2~10%, antioxidant 1 ~3%, above-mentioned raw materials are added blender, obtain dry blend after stirring 3~5min by additive 1~10%, are then added dry The bonding agent of mixing weight percent 3~5%, then stirs 10min, obtains the first heat-resistant layer and the pre- binder of the second heat-resistant layer.

D, take by weight percentage: the alumina 20~25% of 5~3mm, the alumina 25~30% of 3~1mm, 1~0mm alum Blender is added in above-mentioned raw materials by white fused alumina 10~20%, the additive 1~10% of native 20~25%, 200 mesh, and stirring 3~ Dry blend is obtained after 5min, then be added dry blend weight percent 3~5% bonding agent, then stir 10min, obtain every The pre- binder of thermosphere.

E, the first heat-resistant layer and the pre- binder of the second heat-resistant layer will be obtained and the pre- binder of thermal insulation layer passes through particular manufacturing craft pressure respectively At preset shapes, the first heat-resistant layer and the second heat-resistant layer and thermal insulation layer are connected together later, then by bonding agent upper and lower Both ends attach top asbestos layer and bottom asbestos layer, then carry out pre-molding, obtain siliceous mullite brick semi-finished product.

F, semi-finished product are obtained into siliceous mullite brick finished product after 1400 DEG C of firings.

Beneficial effect

For the present invention when practical, seam crossing block dress is tighter, and it is firm to connect between each other, stress one, load-bearing capacity By force, inside there is cavity, be self-possessed small, guarantee physical life；The first heat-resistant layer of cement rotary kiln transition belt brick two sides and the second heat-resistant layer Heat proof material has the characteristics that the erosion performance of good thermal shock resistance and cement material and salt, while benefit using silicon oxynitride With the SiO of melting₂With the nonferrous metal such as silicate and the A1 and Cu of melting to the nonwettable principle of silicon oxynitride ceramics, the brick Cement rotary kiln transition belt brick obtained does not hang kliner coating；Using with insulated cavity among the first heat-resistant layer and the second heat-resistant layer Thermal insulation layer, heat-insulating capability is strong, and thermal coefficient is small, avoids kiln cylinder body temperature drift, and energy consumption is small, reduce cement kiln cost.

Detailed description of the invention

Fig. 1 is a kind of main view of cement rotary kiln siliceous mullite brick and preparation method thereof.

Fig. 2 is a kind of structural schematic diagram of cement rotary kiln siliceous mullite brick and preparation method thereof depression angle.

Fig. 3 is a kind of structural schematic diagram of cement rotary kiln siliceous mullite brick and preparation method thereof LOOK RIGHT degree.

Fig. 4 is a kind of structural schematic diagram of cement rotary kiln siliceous mullite brick and preparation method thereof left view angle.

In figure: thermal insulation layer 1, the first tenon 2, the first heat-resistant layer 3, the second heat-resistant layer 4, cavity 5, the second tenon 6, apex stone cotton Layer the 7, second card slot 8, the second deck 9, the first deck 10, the first card slot 11, bottom asbestos layer 12, the second clamp 13, the first clamp 14。

Specific embodiment

Please refer to Fig. 1~4, in the embodiment of the present invention, a kind of cement rotary kiln siliceous mullite brick mainly includes thermal insulation layer 1, the One heat-resistant layer 3 and the second heat-resistant layer 4 offer perforative cavity 5 up and down, 5 rear and front end of cavity in the middle part of the thermal insulation layer 1 Side wall offers the tenon slot of equidistant arrangement；First heat-resistant layer, 3 front side wall, which is extended forward, the first of equidistant arrangement Tenon 2, the first tenon 2 is sliding via tenon slot and thermal insulation layer 1, and 3 front side wall of the first heat-resistant layer and 1 rear wall of thermal insulation layer are tight Contiguity touching, the 3 right end lower rightward of the first heat-resistant layer, which is extended, the first deck 10, and 10 top of the first deck offers First card slot 11, the 3 left end lower part of the first heat-resistant layer extend downward with the first clamp 14；After second heat-resistant layer 4 Side wall, which extends back, is provided with the second tenon 6 of equidistant arrangement, and the second tenon 6 is sliding via tenon slot and thermal insulation layer 1, and described the Two heat-resistant layers, 4 rear wall and 1 front side wall of thermal insulation layer are in close contact, and the 4 right end lower rightward of the second heat-resistant layer, which is extended, to be had Second deck 9,9 top of the second deck offer the second card slot 8, and the 4 left end lower part of the second heat-resistant layer extends downward with Second clamp 13, the thermal insulation layer 1, the first heat-resistant layer 3 and the clamping of the second heat-resistant layer 4 constitute main body, and main body upper and lower ends are fixed Top asbestos layer 7 and bottom asbestos layer 12 are installed.

The cement rotary kiln is made with siliceous mullite brick of the raw material of following weight percentage: by the original of following weight percentage Material is made: alumina 45~65%, white alundum powder 5-10%, α-Al₂O₃Micro mist 2~10%, silicon oxynitride 5~20%, antioxidant 1~3%, additive 1~10% and bonding agent 2~6%；

The additive is andalusite.

The antioxidant is metallic silicon power.

The bonding agent is spent pulping liquor.

The Al of the alumina₂O₃Content >=88%, alumina include 5~3mm, 3~1mm, 1~0mm, tri- kinds of grain compositions, 5~ The alumina of 3mm accounts for the 15~20% of raw material gross weight, and the alumina of 3~1mm accounts for the 20~25% of raw material gross weight, 1~0mm's Alumina accounts for the 15~20% of raw material gross weight, the Al of the white fused alumina₂O₃Content >=99%, granularity are 200 mesh.

A kind of preparation method of cement rotary kiln siliceous mullite brick, comprising the following steps:

Take alumina, white fused alumina, silicon oxynitride, α-Al₂O₃Micro mist, metallic silicon power, antioxidant, additive and bonding agent, it is standby With；

Alumina is worn into fine powder, is classified into 5~3mm, 3~1mm and 1~0mm, tri- kinds of varigrained particulate materials, it is standby With；White fused alumina is worn into 200 mesh fine powders, it is spare；Silicon oxynitride is worn into 320 targeted fine powders, it is spare；

Take by weight percentage: the alumina 15~20% of 5~3mm, the alumina 20~25% of 3~1mm, 1~0mm alumina White fused alumina 5~15%, silicon oxynitride 5~20%, the α-Al of 15~20%, 200 mesh₂O₃Micro mist 2~10%, antioxidant 1~ 3%, above-mentioned raw materials are added blender, obtain dry blend after stirring 3~5min, dry blend is then added by additive 1~10% The bonding agent of weight percent 3~5%, then stirs 10min, obtains the first heat-resistant layer 3 and the pre- binder of the second heat-resistant layer 4.

Take by weight percentage: the alumina 20~25% of 5~3mm, the alumina 25~30% of 3~1mm, 1~0mm alumina Blender is added in above-mentioned raw materials by white fused alumina 10~20%, the additive 1~10% of 20~25%, 200 mesh, and stirring 3~ Dry blend is obtained after 5min, then be added dry blend weight percent 3~5% bonding agent, then stir 10min, obtain every The pre- binder of thermosphere 1.

It will obtain the first heat-resistant layer 3 and the pre- binder of the second heat-resistant layer 4 and the pre- binder of thermal insulation layer 1 passes through particular manufacturing craft pressure respectively At preset shapes, the first heat-resistant layer 3 and the second heat-resistant layer 4 and thermal insulation layer 1 are connected together later, then by bonding agent upper Lower both ends attach top asbestos layer 7 and bottom asbestos layer 12, then carry out pre-molding, obtain siliceous mullite brick semi-finished product.

Semi-finished product are obtained into siliceous mullite brick finished product after 1400 DEG C of firings.