CN112745108A - High-density chromium corundum brick for hazardous waste disposal rotary kiln - Google Patents

High-density chromium corundum brick for hazardous waste disposal rotary kiln Download PDF

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Publication number
CN112745108A
CN112745108A CN202011420605.8A CN202011420605A CN112745108A CN 112745108 A CN112745108 A CN 112745108A CN 202011420605 A CN202011420605 A CN 202011420605A CN 112745108 A CN112745108 A CN 112745108A
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China
Prior art keywords
equal
rotary kiln
kiln
hazardous waste
percent
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CN202011420605.8A
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Chinese (zh)
Inventor
夏文斌
高长贺
占华生
马淑龙
卫迎锋
蔡斌利
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Gongyi Tongda Zhongyuan Refractory Technology Co ltd
Beijing Jinyu Tongda Refractory Technology Co ltd
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Gongyi Tongda Zhongyuan Refractory Technology Co ltd
Beijing Jinyu Tongda Refractory Technology Co ltd
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Priority to CN202011420605.8A priority Critical patent/CN112745108A/en
Publication of CN112745108A publication Critical patent/CN112745108A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C04B35/105—Refractories from grain sized mixtures containing chromium oxide or chrome ore
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance

Abstract

A high-density chromium corundum brick for a hazardous waste disposal rotary kiln belongs to the field of refractory materials. The chrome corundum brick comprises the following components in percentage by weight: chromium oxide with a particle size of less than or equal to 3 mm: 1-20%; alumina micro powder with the particle size less than or equal to 0.004 mm: 5-15%; binding agent: 1-5%; the balance is corundum with the grain diameter less than or equal to 8 mm: wherein Al is2O3More than or equal to 94 percent; the raw materials are mixed according to the required proportion, pug is prepared in a mixing roll, the pug is formed under the pressure of more than or equal to 400 tons, and the formed green brick is fired in a tunnel kiln or a shuttle kiln at the temperature of 1500-1800 ℃. The rotary kiln for disposing the hazardous waste has the advantages that the rotary kiln is suitable for the rotary kilns for disposing the hazardous waste of various specifications, the service life of a product can reach more than 6 months, and the rotary kiln has a very positive effect on improving the running rate of the rotary kiln for disposing the hazardous waste.

Description

High-density chromium corundum brick for hazardous waste disposal rotary kiln
Technical Field
The invention belongs to the field of refractory materials, and particularly relates to a high-density chromium corundum brick for a rotary kiln for hazardous waste disposal.
Background
In recent years, with the massive construction of hazardous waste treatment projects in China, the lining of a rotary kiln of main incineration equipment mainly uses refractory bricks, the types of treated materials are complex, the requirements on refractory materials are strict, and the service life of the refractory bricks becomes a key for increasing benefits in hazardous waste treatment operation management. However, the corrosion resistance, penetration resistance, thermal shock resistance and high-temperature wear resistance of the currently used refractory bricks are influenced by the raw material selection and production process, and the comprehensive performance is low, so that the long-life and high-load operation of the rotary kiln cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a high-density chromium corundum brick for a rotary kiln for hazardous waste disposal, which solves the problem that the comprehensive performance of a refractory brick is low in erosion resistance, permeation resistance, thermal shock resistance and high-temperature wear resistance. The high-density chromium corundum brick with excellent comprehensive performances of erosion resistance, penetration resistance, thermal shock resistance, high temperature wear resistance and the like is prepared.
A high-density chromium corundum brick for a rotary kiln for hazardous waste disposal comprises the following components in percentage by weight: chromium oxide with a particle size of less than or equal to 3 mm: wherein Cr is2O3More than or equal to 98 percent, and the mass percent is 1-20 percent; alumina micro powder with the particle size less than or equal to 0.004 mm: wherein Al is2O3More than or equal to 99 percent, and the mass percent is 5-15 percent; binding agent: the mass percentage is 1-5%; the balance is corundum with the grain diameter less than or equal to 8 mm: wherein Al is2O3≥94％。
The binding agent is one or more of water glass, aluminum dihydrogen phosphate, lignin and the like.
The raw materials are mixed according to the required proportion, pug is prepared in a mixing roll, the pug is formed under the pressure of more than or equal to 400 tons, and the formed green brick is fired in a tunnel kiln or a shuttle kiln at the temperature of 1500-1800 ℃.
The preparation steps are as follows:
1) preparing materials: chromium oxide with a particle size of less than or equal to 3 mm: 1-20%; alumina micro powder with the particle size less than or equal to 0.004 mm: 5-15%; binding agent: 1-5%; the balance is corundum with the grain diameter less than or equal to 8 mm;
2) mixing: weighing various raw materials according to the proportion, and uniformly mixing in a mixing roll to obtain pug;
3) molding: pressing and forming the mixed wet material after 1-24 hours, wherein the tonnage of a forming press is more than or equal to 400 tons;
4) and (3) drying: drying in a drying kiln for more than 24 hours, wherein the temperature of a drying entrance is 30-70 ℃, and the highest drying temperature is controlled at 110-150 ℃.
5) And (3) firing: firing in a 1500-1800 ℃ high-temperature tunnel kiln or a shuttle kiln.
The high-density chromium corundum bricks are used in rotary kilns for treating dangerous wastes of various specifications.
The invention has the advantages that the rotary kiln is suitable for the rotary kilns for disposing the hazardous wastes of various specifications, the product has excellent erosion resistance, permeation resistance and thermal shock stability, good high-temperature wear resistance, the service life of the product can reach more than 6 months, and the rotary kiln plays a very positive role in improving the running rate of the rotary kilns for disposing the hazardous wastes. The fired high-density chromium corundum brick has simple process and excellent performance.
Detailed Description
Example 1
A high-density chromium corundum brick for a hazardous waste disposal rotary kiln comprises the following components in parts by weight:
Figure BDA0002822066730000021
the raw materials are mixed according to the required proportion, pug is prepared in a mixing roll, the pug is formed under the pressure of more than or equal to 400 tons, and the formed green brick is sintered in a 1500-plus 1800 ℃ tunnel kiln or a shuttle kiln.
Example 2
A high-density chromium corundum brick for a hazardous waste disposal rotary kiln comprises the following components in parts by weight:
Figure BDA0002822066730000022
the raw materials are mixed according to the required proportion, pug is prepared in a mixing roll, the pug is formed under the pressure of more than or equal to 400 tons, and the formed green brick is sintered in a 1500-plus 1800 ℃ tunnel kiln or a shuttle kiln.
Example 3
A high-density chromium corundum brick for a hazardous waste disposal rotary kiln comprises the following components in parts by weight:
Figure BDA0002822066730000023
Figure BDA0002822066730000031
the raw materials are mixed according to the required proportion, pug is prepared in a mixing roll, the pug is formed under the pressure of more than or equal to 400 tons, and the formed green brick is sintered in a 1500-plus 1800 ℃ tunnel kiln or a shuttle kiln.

Claims (3)

1. A high-density chromium corundum brick for a hazardous waste disposal rotary kiln is characterized by comprising the following components in percentage by weight: chromium oxide with a particle size of less than or equal to 3 mm: wherein Cr is2O3More than or equal to 98 percent, and the mass percent is 1-20 percent; alumina micro powder with the particle size less than or equal to 0.004 mm: wherein Al is2O3More than or equal to 99 percent, and the mass percent is 5-15 percent; binding agent: the mass percentage is 1-5%; the balance is corundum with the grain diameter less than or equal to 8 mm: wherein Al is2O3≥94％。
2. The chrome corundum brick as claimed in claim 1, wherein the binder is one or more of water glass, aluminum dihydrogen phosphate and lignin.
3. The chrome corundum brick as claimed in claim 1, wherein the preparation method of the chrome corundum brick comprises the following specific steps and parameters:
1) preparing materials: chromium oxide with a particle size of less than or equal to 3 mm: 1-20%; alumina micro powder with the particle size less than or equal to 0.004 mm: 5-15%; binding agent: 1-5%; the balance is corundum with the grain diameter less than or equal to 8 mm;
2) mixing: weighing various raw materials according to the proportion, and uniformly mixing in a mixing roll to obtain pug;
3) molding: pressing and forming the mixed wet material after 1-24 hours, wherein the tonnage of a forming press is more than or equal to 400 tons;
4) and (3) drying: drying in a drying kiln for more than 24 hours, wherein the temperature of a drying entrance is 30-70 ℃, and the highest drying temperature is controlled at 110-150 ℃;
5) and (3) firing: firing in a 1500-1800 ℃ high-temperature tunnel kiln or a shuttle kiln.
CN202011420605.8A 2020-12-07 2020-12-07 High-density chromium corundum brick for hazardous waste disposal rotary kiln Pending CN112745108A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113173795A (en) * 2021-06-09 2021-07-27 江苏君耀耐磨耐火材料有限公司 Chromium corundum brick for sulfur recovery acid gas incinerator and preparation process thereof
CN116396062A (en) * 2023-04-07 2023-07-07 中钢洛耐科技股份有限公司 Spinel composite chrome corundum brick for salt-containing wastewater incinerator and preparation method thereof

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999001399A1 (en) * 1997-07-01 1999-01-14 Didier-Werke Ag Refractory, chrome-alumina-based material, chrome-alumina brick and use of the brick
CN1257051A (en) * 1998-12-11 2000-06-21 王永利 Unfired chromium corundum refractory material products
CN1884201A (en) * 2006-07-11 2006-12-27 中钢集团洛阳耐火材料研究院 Permeable fireproof materials for aluminium refining and process for preparing same
CN1887788A (en) * 2006-07-17 2007-01-03 高振东 High-strength compact zirconia-chromia corundum brick
CN102531651A (en) * 2012-01-11 2012-07-04 郑州华威耐火材料股份有限公司 Preparation method for rebonded electrically fused chrome corundum brick
CN105777085A (en) * 2016-01-28 2016-07-20 郑州安联凯实业有限公司 Anti-erosion refractory material
CN108046813A (en) * 2017-12-18 2018-05-18 江苏诺明高温材料股份有限公司 It is a kind of with chromium slag/high chromium give up brick prepare dangerous waste incineration revolution kiln refractory method
WO2018126937A1 (en) * 2017-01-09 2018-07-12 武汉科技大学 Dispersion-type corundum-spinel air-permeable brick and preparation method therefor
CN109265151A (en) * 2018-10-19 2019-01-25 广州市石基耐火材料厂 Low zirconia-chromia corundum brick and preparation method thereof
CN109320219A (en) * 2018-11-13 2019-02-12 辽宁中镁高温材料有限公司 A kind of high-performance aluminum chrome refractory and preparation method thereof and application
CN109650857A (en) * 2019-02-20 2019-04-19 中钢集团耐火材料有限公司 A kind of nonferrous smelting fusing smelting furnace task layer refractory material and preparation method thereof

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999001399A1 (en) * 1997-07-01 1999-01-14 Didier-Werke Ag Refractory, chrome-alumina-based material, chrome-alumina brick and use of the brick
CN1257051A (en) * 1998-12-11 2000-06-21 王永利 Unfired chromium corundum refractory material products
CN1884201A (en) * 2006-07-11 2006-12-27 中钢集团洛阳耐火材料研究院 Permeable fireproof materials for aluminium refining and process for preparing same
CN1887788A (en) * 2006-07-17 2007-01-03 高振东 High-strength compact zirconia-chromia corundum brick
CN102531651A (en) * 2012-01-11 2012-07-04 郑州华威耐火材料股份有限公司 Preparation method for rebonded electrically fused chrome corundum brick
CN105777085A (en) * 2016-01-28 2016-07-20 郑州安联凯实业有限公司 Anti-erosion refractory material
WO2018126937A1 (en) * 2017-01-09 2018-07-12 武汉科技大学 Dispersion-type corundum-spinel air-permeable brick and preparation method therefor
CN108046813A (en) * 2017-12-18 2018-05-18 江苏诺明高温材料股份有限公司 It is a kind of with chromium slag/high chromium give up brick prepare dangerous waste incineration revolution kiln refractory method
CN109265151A (en) * 2018-10-19 2019-01-25 广州市石基耐火材料厂 Low zirconia-chromia corundum brick and preparation method thereof
CN109320219A (en) * 2018-11-13 2019-02-12 辽宁中镁高温材料有限公司 A kind of high-performance aluminum chrome refractory and preparation method thereof and application
CN109650857A (en) * 2019-02-20 2019-04-19 中钢集团耐火材料有限公司 A kind of nonferrous smelting fusing smelting furnace task layer refractory material and preparation method thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
云斯宁等: "垃圾焚烧炉用耐火材料的使用现状及发展趋势", 《西安建筑科技大学学报（自然科学版）》 *
胡宝玉等: "《特种耐火材料实用技术手册》", 30 June 2004, 冶金工业出版社 *
陈昆柏等: "《危险废物处理与处置》", 31 May 2017, 河南科学技术出版社 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113173795A (en) * 2021-06-09 2021-07-27 江苏君耀耐磨耐火材料有限公司 Chromium corundum brick for sulfur recovery acid gas incinerator and preparation process thereof
CN116396062A (en) * 2023-04-07 2023-07-07 中钢洛耐科技股份有限公司 Spinel composite chrome corundum brick for salt-containing wastewater incinerator and preparation method thereof

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Application publication date: 20210504