CN105060905A - Low-aluminum alkali-resistant mullite brick and preparation method thereof - Google Patents
Low-aluminum alkali-resistant mullite brick and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a low-aluminum alkali-resistant mullite brick and a preparation method thereof. The mullite brick comprises the following raw materials in percentage by weight: 30 to 50% of waste high voltage electric porcelain (3-1 mm), 15 to 30% of synthesized low-aluminum mullite (1-0.088 mm), 20 to 30% of synthesized low-aluminum mullite (<0.088 mm), 5 to 15% of silicon sand powder (<0.088 mm), and 5 to 10% of waste sulfurous acid paper pulp. The preparation method comprises the following steps: adding the raw materials in to a wet grinding machine according to the ratio mentioned above, mixing the raw materials in the wet grinding machine for 15 to 20 minutes, pressing and moulding the mixture under a pressure of 200-250 MPa, conveying the moulds to a kiln, drying the moulds at a temperature of 110-120 DEG C for 20 to 24 hours, sintering the moulds at a temperature of 1300 to 1400 DEG C, and finally maintaining the temperature for 6 to 8 hours so as to obtain the bricks. According to the preparation method, industrial waste electric porcelain and synthesized low-aluminum mullite are taken as the main raw materials, and thus the brick has an excellent performance on resisting alkali corrosion, high temperature, and thermal shock and can be widely applied to the preheating decomposition belt of cement kiln.
Description
Technical field
The invention belongs to technical field of refractory materials, relate to aluminum silica refractory, be specifically related to alkaline-resisting mullite brick of a kind of low aluminium and preparation method thereof.
Background technology
At present, China's new type nonaqueous cement preheating in rotary kiln divides the refractory materials that ungirds mainly to configure siliceous mullite brick, although can meet Production requirement, uses this kind of product to bring following problem: siliceous mullite brick all uses one-level or high grade bauxite, and adding the SiC of mass ratio 10%-25%, production cost is high; And its higher thermal conductivity makes cement kiln fuel ton consume rising, causes energy dissipation; Because in siliceous mullite brick, alumina content is high, the alkali erosional competency for preheating decomposition zone is not enough, alkali cracking phenomenon occurs, affects work-ing life.Therefore, no matter be from the viewpoint of refractory material resources saving or from cement clinker energy consumption reduction etc., the alkaline-resisting mullite brick of the low aluminium of the present invention is proposed, be applied to cement rotary kiln preheating decomposition zone, play its excellent alkali attack and high thermal resistance feature, substitute siliceous mullite brick, stablize refractory materials work-ing life, effectively utilize refractory material resources.
Summary of the invention
The object of the invention is to, study alkaline-resisting mullite brick of a kind of low aluminium and preparation method thereof, this product adopts the high pressure electroceramics that gives up to do main raw material, and production cost far below being the refractory materials that raw material is made with higher-grade bauxitic clay, therefore has good economic use value.The alumina content of this material is between alkaline-resisting clay brick and high alumina brick, therefore resistance to elevated temperatures is better than common Alkali resistant brick.Raw material adopts synthesis low aluminum-containing mullite obviously can improve heat-shock resistance and the alkali resistance of material.In addition, in raw material, add silica flour, the ability of resisting alkali vapours attack can be strengthened further.Therefore, it can replace existing common Alkali resistant brick, anti-peeling high aluminium brick and conventional siliceous mullite brick, be widely used in dividing in kiln tail preheater, decomposing furnace, tertiary-air pipe and kiln ungirding, fully utilize industrial wastes high tension insulator simultaneously, facilitated the Appropriate application of resource, filled up in the zone of transition in quality coal in cement kiln systems from low temperature to high temperature and both there is alkali resistance, again there is high thermal resistance, and cheap material blank.For achieving the above object, the present invention can take following technical proposals:
Feed composition weight percent of the present invention:
3-1mm high pressure gives up electroceramics 30%-50%, 1-0.088mm synthesis low aluminum-containing mullite 15-30%, < 0.088mm synthesizes low aluminum-containing mullite 20-30%, < 0.088mm silica flour 5%-15%, the lignosulfite of additional above-mentioned raw materials gross weight 5-10% makes bonding agent.
Described high pressure give up electroceramics refer to electroceramics factory produce high tension insulator time substandard product and use after through recovery old high tension insulator, in waste and old high tension insulator, the content of aluminum oxide is 30%-60%, and because waste and old high tension insulator have passed through the techniques such as homogenizing, fine grinding and high temperature burn till in its production process, therefore its performance is better than pocket clay grog, and cheap, pocket clay grog can be substituted completely.
The high pressure of described 3-1mm gives up electroceramics, and refer to that particle diameter is that the high pressure of 3-1mm gives up electroceramics, its alumina content is 56%; Synthesis low aluminum-containing mullite, alumina content is 45%; Silica flour, SiO
2content>=99%; Lignosulfite proportion is 1.3-1.5g/cm
3.
Production technique of the present invention is:
Above-mentioned raw materials is proportionally mixed, then adds lignosulfite, mixing 15 ~ 20min in edge runner-wet mill; At the forming under the pressure of 200 ~ 250Mpa; Adobe is in the tunnel drying kiln of 110-120 DEG C after dry 20 ~ 24h in temperature, enters at 1300 ~ 1400 DEG C, to be incubated 6-8h in hyperthermia tunnel Kiln and to burn till.
Compared with prior art, the present invention has following beneficial effect: 1) adopt the high pressure electroceramics that gives up to make raw material, not only reduce the consumption of superfine now quite in short supply and one-level alumina resource, and Industry Waste electroceramics is turned waste into wealth, solve the process problem of industrial refuse.2) the alkaline-resisting mullite brick alumina content of low aluminium provided by the invention is 40-50%, adds silica flour simultaneously, have more excellent high thermal resistance while making its alkaline resistance properties reach common Alkali resistant brick performance requriements in raw material.3) adopt synthesis low aluminum-containing mullite to do main raw material, the needle-like mutual staggered-mesh structure of mullite can make material have good thermal shock resistance, and the thermal conductivity of mullite is low, effectively can reduce calorific loss.4) compared with siliceous mullite brick, product price of the present invention is cheap, greatly reduces the operation cost of cement production enterprise.
Concrete case study on implementation:
Embodiment 1
3-1mm high pressure is adopted to give up electroceramics 46%, 1-0.088mm synthesis low aluminum-containing mullite 25%, < 0.088mm synthesizes low aluminum-containing mullite 24%, < 0.088mm silica flour 5%, the lignosulfite of additional above-mentioned raw materials gross weight 5% makes bonding agent, after edge runner-wet mill is mixing, adopts pressing machine shaping, in dry kiln after 110 DEG C of oven dry 24h, obtained finished product after the high temperature sintering 6h of 1400 DEG C.
Embodiment 2
3-1mm high pressure is adopted to give up electroceramics 42%, 1-0.088mm synthesis low aluminum-containing mullite 28%, < 0.088mm synthesizes low aluminum-containing mullite 22%, < 0.088mm silica flour 8%, the lignosulfite of additional above-mentioned raw materials gross weight 5% makes bonding agent, after edge runner-wet mill is mixing, adopts pressing machine shaping, in dry kiln after 110 DEG C of oven dry 24h, obtained finished product after the high temperature sintering 6h of 1350 DEG C.
Embodiment 3
3-1mm high pressure is adopted to give up electroceramics 39%, 1-0.088mm synthesis low aluminum-containing mullite 24%, < 0.088mm synthesizes low aluminum-containing mullite 25%, < 0.088mm silica flour 12%, the lignosulfite of additional above-mentioned raw materials gross weight 5% makes bonding agent, after edge runner-wet mill is mixing, adopts pressing machine shaping, in dry kiln after 110 DEG C of oven dry 24h, obtained finished product after the high temperature sintering 6h of 1350 DEG C.
Embodiment 4
3-1mm high pressure is adopted to give up electroceramics 35%, 1-0.088mm synthesis low aluminum-containing mullite 27%, < 0.088mm synthesizes low aluminum-containing mullite 23%, < 0.088mm silica flour 15%, the lignosulfite of additional above-mentioned raw materials gross weight 5% makes bonding agent, after edge runner-wet mill is mixing, adopts pressing machine shaping, in dry kiln after 110 DEG C of oven dry 24h, obtained finished product after the high temperature sintering 6h of 1350 DEG C.
The alkaline-resisting mullite brick of low aluminium got prepared by above case study on implementation carries out normal experiment analysis, and each performance perameter and the contrast of common siliceous mullite brick see the following form:
Claims (2)
1. the alkaline-resisting mullite brick of low aluminium, it is characterized in that: by percentage to the quality, its raw materials is as follows: 3-1mm high pressure gives up electroceramics 30%-50%, 1-0.088mm synthesis low aluminum-containing mullite 15-30%, < 0.088mm synthesizes low aluminum-containing mullite 20-30%, < 0.088mm silica flour 5%-15%, and the lignosulfite of additional above-mentioned raw materials gross weight 5-10% makes bonding agent, the high pressure of wherein said 3-1mm gives up electroceramics, and its alumina content is 56%; Synthesis low aluminum-containing mullite, alumina content is 45%; Silica flour, SiO
2content>=99%; Lignosulfite proportion is 1.3-1.5g/cm
3.
2. produce a production technique for mullite brick described in claim 1, it is characterized in that: described raw material is mixed, then adds lignosulfite, mixing 15 ~ 20min in edge runner-wet mill, then under the pressure of 200 ~ 250Mpa green brick forming; Adobe is enter after dry 20 ~ 24h in the tunnel drying kiln of 110-120 DEG C at 1300 ~ 1400 DEG C, to be incubated 6-8h in hyperthermia tunnel Kiln and to burn till in temperature.
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| CN201510455796.4A CN105060905B (en) | 2015-07-24 | 2015-07-24 | Low alkaline-resisting mullite brick of aluminium and preparation method thereof |
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| CN201510455796.4A CN105060905B (en) | 2015-07-24 | 2015-07-24 | Low alkaline-resisting mullite brick of aluminium and preparation method thereof |
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| CN105060905A true CN105060905A (en) | 2015-11-18 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064948A (en) * | 2016-07-26 | 2016-11-02 | 郑州顺通新型耐火材料有限公司 | A kind of manufacture method of the leakage proof brick used on aluminium manufacturer electrolysis bath |
| CN107986800A (en) * | 2017-11-29 | 2018-05-04 | 吕梁耀金道冶金材料工程技术有限公司 | A kind of porcelain aluminium Alkali resistant brick and preparation method thereof |
| CN108955242A (en) * | 2018-09-07 | 2018-12-07 | 文县祁连山水泥有限公司 | A method of cement rotary kiln being transformed using refractory heat-insulating mullite brick |
| CN109111215A (en) * | 2018-08-29 | 2019-01-01 | 通达耐火技术股份有限公司 | A kind of cement rotary kiln low aluminum silicon not brick and preparation method thereof |
| CN111747728A (en) * | 2020-05-13 | 2020-10-09 | 九江市璀鑫新材料有限公司 | Preparation method of high-strength alkali-resistant brick |
| WO2022129698A1 (en) * | 2020-12-16 | 2022-06-23 | Oulun Yliopisto | Manufacturing composite electroceramics using waste electroceramics |
| CN115490528A (en) * | 2022-10-31 | 2022-12-20 | 安徽瑞泰新材料科技有限公司 | High-strength refractory brick and preparation method thereof |
| CN115745585A (en) * | 2022-11-23 | 2023-03-07 | 中国地质大学（北京） | Preparation method for preparing low-aluminum mullite refractory brick by using waste electroceramics |
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| CN1303834A (en) * | 1999-11-22 | 2001-07-18 | 冶金工业部洛阳耐火材料研究院 | Corundum-mullite product |
| CN103044050A (en) * | 2013-01-25 | 2013-04-17 | 苏州罗卡节能科技有限公司 | Medium-density alkali-resistant brick for rotary kiln and preparation method thereof |
| CN103373856A (en) * | 2012-04-26 | 2013-10-30 | 郑州安耐克实业有限公司 | High-stress-strain low-creepage high-thermal-shock-resistance refractory brick and manufacturing method thereof |
| CN103553661A (en) * | 2013-10-18 | 2014-02-05 | 李富朝 | Preparation method for mullite-roller bed bar waste-cordierite product for hot-blast stove ceramic burner |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1303834A (en) * | 1999-11-22 | 2001-07-18 | 冶金工业部洛阳耐火材料研究院 | Corundum-mullite product |
| CN103373856A (en) * | 2012-04-26 | 2013-10-30 | 郑州安耐克实业有限公司 | High-stress-strain low-creepage high-thermal-shock-resistance refractory brick and manufacturing method thereof |
| CN103044050A (en) * | 2013-01-25 | 2013-04-17 | 苏州罗卡节能科技有限公司 | Medium-density alkali-resistant brick for rotary kiln and preparation method thereof |
| CN103553661A (en) * | 2013-10-18 | 2014-02-05 | 李富朝 | Preparation method for mullite-roller bed bar waste-cordierite product for hot-blast stove ceramic burner |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064948A (en) * | 2016-07-26 | 2016-11-02 | 郑州顺通新型耐火材料有限公司 | A kind of manufacture method of the leakage proof brick used on aluminium manufacturer electrolysis bath |
| CN107986800A (en) * | 2017-11-29 | 2018-05-04 | 吕梁耀金道冶金材料工程技术有限公司 | A kind of porcelain aluminium Alkali resistant brick and preparation method thereof |
| CN109111215A (en) * | 2018-08-29 | 2019-01-01 | 通达耐火技术股份有限公司 | A kind of cement rotary kiln low aluminum silicon not brick and preparation method thereof |
| CN108955242A (en) * | 2018-09-07 | 2018-12-07 | 文县祁连山水泥有限公司 | A method of cement rotary kiln being transformed using refractory heat-insulating mullite brick |
| CN108955242B (en) * | 2018-09-07 | 2019-11-01 | 文县祁连山水泥有限公司 | A method of cement rotary kiln being transformed using refractory heat-insulating mullite brick |
| CN111747728A (en) * | 2020-05-13 | 2020-10-09 | 九江市璀鑫新材料有限公司 | Preparation method of high-strength alkali-resistant brick |
| WO2022129698A1 (en) * | 2020-12-16 | 2022-06-23 | Oulun Yliopisto | Manufacturing composite electroceramics using waste electroceramics |
| CN115490528A (en) * | 2022-10-31 | 2022-12-20 | 安徽瑞泰新材料科技有限公司 | High-strength refractory brick and preparation method thereof |
| CN115745585A (en) * | 2022-11-23 | 2023-03-07 | 中国地质大学（北京） | Preparation method for preparing low-aluminum mullite refractory brick by using waste electroceramics |
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| CN105060905B (en) | 2018-01-05 |
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Effective date of registration: 20220418 Address after: 277500 Residence of Jiehe Town, Tengzhou City, Zaozhuang City, Shandong Province Patentee after: Shandong Ruitai Gezer Engineering Co.,Ltd. Address before: 100024 building 27, yard 1, Wuliqiao 1st Street, Chaoyang District, Beijing Patentee before: RUITAI TECHNOLOGY Co.,Ltd. |
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