CN108383506A - A kind of preparation method of magnesium Cr-Zr brick - Google Patents

A kind of preparation method of magnesium Cr-Zr brick Download PDF

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Publication number
CN108383506A
CN108383506A CN201810201067.XA CN201810201067A CN108383506A CN 108383506 A CN108383506 A CN 108383506A CN 201810201067 A CN201810201067 A CN 201810201067A CN 108383506 A CN108383506 A CN 108383506A
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brick
test block
vacuum
tank
magnesium
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CN201810201067.XA
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尹斌
张义先
王新杰
杨敬彪
杨庆余
王健骁
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Haicheng Lear Meg Materials Co Ltd Sita
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Haicheng Lear Meg Materials Co Ltd Sita
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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
    • C04B35/03—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
    • C04B35/04—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 magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
    • C04B35/043—Refractories from grain sized mixtures
    • C04B35/047—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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5007—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing
    • C04B41/5011—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with salts or salty compositions, e.g. for salt glazing containing halogen in the anion
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • 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
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
    • 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
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • 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
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
    • 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
    • C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint

Abstract

The present invention relates to a kind of preparation methods of magnesium Cr-Zr brick, by MgO Cr2O3Brick is made quadrangular test block and is put into vacuum tank, and vacuum pressure inside the tank is made to be less than 0.01Pa, and solution tank valve is opened in pressurize, so that salting liquid is entered in vacuum tank, until solution is totally submerged test block, closes valve, then pressurize, test block is taken out, drying in drying box is put into, places into electric furnace and be heat-treated.Advantage is：By by MgO Cr2O3Brick vacuum-normal pressure impregnates ZrOCl2Magnesium Cr-Zr brick prepared by solution, the porosity substantially reduce, and consistency and normal temperature strength also accordingly improve.The ZrO introduced by infusion process2, be distributed in a manner of reunion brick aggregate and matrix binding site, matrix position crackle and stomata in, can obviously refine internal porosity aperture, thus the resistance to slag corrosion of brick can also be improved.

Description

A kind of preparation method of magnesium Cr-Zr brick
Technical field
The present invention relates to a kind of preparation methods of magnesium Cr-Zr brick.
Background technology
Magnesium chromium series refractory material has many advantages, such as that corrosion resistance is good, intensity is high, wide in steel and colored metallurgical industrial General application.But traditional magnesite-chrome brick thermal shock resistance is poor, and the porosity is also relatively high, easily corroded by slag and metal liquid and Damage.In order to further increase the performance of magnesite-chrome brick, ZrO is usually introduced2The heat resistanceheat resistant of magnesite-chrome brick is improved as modifying agent Pinking and corrosion resistance.And general magnesium Cr-Zr brick is all to be introduced directly into ZrO in the feed2Made of after sintering, and it is therein Impurity SiO2Magnesite-chrome brick can be reduced binds directly rate.Haicheng Zhongxing High-Grade Magnesia Brick Co., Ltd. proposes to research and develop a kind of magnesium chromium The preparation method of zirconia block.
Invention content
In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a kind of preparation methods of magnesium Cr-Zr brick, reduce gas Porosity improves consistency and normal temperature strength.
To achieve the above object, the invention is realized by the following technical scheme：
A kind of preparation method of magnesium Cr-Zr brick, includes the following steps：
1) by MgO-Cr2O3Brick is made quadrangular test block and is put into vacuum tank, and vacuum pressure inside the tank is made to be less than 0.01Pa, protects It presses 5min or more to open solution tank valve, the salting liquid of 1.5~3.0mol/L is made to enter in vacuum tank, until solution is totally submerged Valve, then pressurize 5min or more are closed in test block, are then removed vacuum and are taken out test block, clean the molten of test block surface adherency rapidly Liquid；
2) it is put into drying box the strong wind at 110~115 DEG C and dries 12~14h, place into electric furnace through 600~650 DEG C Heat treatment.
The test block is the MgO-Cr in conjunction with formation using RH stove lower channel electric smelting2O3The chemical composition of brick, test block is pressed Weight percent group becomes：MgO 57%~62%, Cr2O319%~21%, Fe2O39%~11%, Al2O35%~ 6%, CaO 0.5%~1%, SiO21%~1.5%.
The salting liquid uses the ZrOCl of technical pure grade2·8H2O is made, and salting liquid chemical composition is as follows：ZrO2+Hf >=36%, SiO2≤ 0.005%, TiO2≤ 0.001%, Fe2O3≤ 0.001%, Na2O≤0.002%, remaining is deionized water.
Compared with prior art, the beneficial effects of the invention are as follows：
By by MgO-Cr2O3Brick vacuum-normal pressure impregnates ZrOCl2Magnesium Cr-Zr brick prepared by solution compares magnesite-chrome brick, gas Porosity substantially reduces, and consistency and normal temperature strength also accordingly improve.The ZrO introduced by infusion process2, it is distributed in a manner of reunion In the aggregate and matrix binding site of brick, the crackle and stomata at matrix position, internal porosity aperture can be obviously refined, thus The resistance to slag corrosion of brick can be improved.
Description of the drawings
Fig. 1 is the structural schematic diagram of dip testing apparatus.
In figure：1- vacuum chamber 2- vacuum pump 3- solution tank 4- flow valve 5- pressure gauge 6- vacuum valves.
Specific implementation mode
The present invention is described in detail with reference to the accompanying drawings of the specification, it should be noted that the implementation of the present invention is unlimited In the following embodiments and the accompanying drawings.
Embodiment 1
See that Fig. 1, the preparation method of magnesium Cr-Zr brick carry out salt-coated test in the dip testing apparatus in laboratory.It impregnated It only vacuumizes, is not pressurized in journey.With deionized water by ZrOCl2·8H2O is configured to the ZrOCl of 1.5mol/L2Solution 1000ml is standby With can also be the ZrOCl of 2.0mol/L, 2.5mol/L or 3.0mol/L2Solution.By MgO-Cr2O3Brick is cut into 40mm × 40mm The test block of × 40mm is put into vacuum tank, starts vacuum pump, until vacuum pressure inside the tank is less than 0.01Pa, is opened after pressurize 5min molten Tank valve makes salting liquid enter in vacuum tank, until salting liquid is totally submerged test block, closes valve, then pressurize 5min, then Removal vacuum simultaneously takes out test block, cleans the solution of test block surface adherency rapidly, is put into drying box under 110 DEG C of environment and air-dries greatly Dry 12h is placed into electric furnace and is heat-treated through 600 DEG C.
Wherein, test block uses RH stove lower channel electric smelting in conjunction with MgO-Cr2O3Brick, chemical composition are by weight percentage： MgO 59.68%, Cr2O320.20%, Fe2O310.73%, Al2O35.32%, CaO 0.82%, SiO21.19%.Salt Solution uses the ZrOCl of technical pure grade2·8H2O makes, and chemical composition requires as follows：ZrO2+ Hf >=36%, SiO2≤ 0.005%, TiO2≤ 0.001%, Fe2O3≤ 0.001%, Na2O≤0.002%, remaining is deionized water.
See Fig. 1, dip testing apparatus includes vacuum chamber, vacuum pump, solution tank, flow valve, pressure gauge, vacuum valve, Vacuum chamber is connected with pressure gauge, and to detect the indoor pressure of vacuum, vacuum chamber passes through the pipe with flow valve with solution tank Road is connected, vacuum pump and vacuum chamber, is equipped with to adjust the internal pressure of vacuum chamber, between vacuum pump and vacuum chamber true Empty valve.
Embodiment 2
See that Fig. 1, the preparation method of magnesium Cr-Zr brick carry out salt-coated test in the dip testing apparatus in laboratory.It impregnated It only vacuumizes, is not pressurized in journey.With deionized water by ZrOCl2·8H2O is configured to the ZrOCl of 2.0mol/L2Solution 1000ml is standby With.By MgO-Cr2O3The test block that brick is cut into 40mm × 40mm × 30mm is put into vacuum tank, starts vacuum pump, until vacuum tank internal pressure Power is less than 0.01Pa, opens solution tank valve after pressurize 5min, salting liquid is made to enter in vacuum tank, until salting liquid is totally submerged Valve, then pressurize 5min are closed in test block, are then removed vacuum and are taken out test block, clean the solution of test block surface adherency rapidly, put Enter in drying box the strong wind under 110 DEG C of environment and dry 12h, places into electric furnace and be heat-treated through 600 DEG C.
Wherein, test block uses RH stove lower channel electric smelting in conjunction with MgO-Cr2O3Brick, chemical composition are by weight percentage： MgO 58.29%, Cr2O319.50%, Fe2O310.69%, Al2O35.84%, CaO 0.77%, SiO21.32%.Salt Solution uses the ZrOCl of technical pure grade2·8H2O makes, and chemical composition requires as follows：ZrO2+ Hf >=36%, SiO2≤ 0.005%, TiO2≤ 0.001%, Fe2O3≤ 0.001%, Na2O≤0.002%, remaining is deionized water.
Embodiment 3
See that Fig. 1, the preparation method of magnesium Cr-Zr brick carry out salt-coated test in the dip testing apparatus in laboratory.It impregnated It only vacuumizes, is not pressurized in journey.With deionized water by ZrOCl2·8H2O is configured to the ZrOCl of 2.5mol/L2Solution 1000ml is standby With.By MgO-Cr2O3The test block that brick is cut into 40mm × 40mm × 60mm is put into vacuum tank, starts vacuum pump, until vacuum tank internal pressure Power is less than 0.01Pa, opens solution tank valve after pressurize 5min, salting liquid is made to enter in vacuum tank, until salting liquid is totally submerged Valve, then pressurize 5min are closed in test block, are then removed vacuum and are taken out test block, clean the solution of test block surface adherency rapidly, put Enter in drying box the strong wind under 110 DEG C of environment and dry 12h, places into electric furnace and be heat-treated through 600 DEG C.
Wherein, test block uses RH stove lower channel electric smelting in conjunction with MgO-Cr2O3Brick, chemical composition are by weight percentage： MgO 57.24%, Cr2O320.88%, Fe2O39.24%, Al2O35.12%, CaO 0.86%, SiO21.11%.Salt is molten Liquid uses the ZrOCl of technical pure grade2·8H2O makes, and chemical composition requires as follows：ZrO2+ Hf >=36%, SiO2≤ 0.005%, TiO2≤ 0.001%, Fe2O3≤ 0.001%, Na2O≤0.002%, remaining is deionized water.
Embodiment 4
See that Fig. 1, the preparation method of magnesium Cr-Zr brick carry out salt-coated test in the dip testing apparatus in laboratory.It impregnated It only vacuumizes, is not pressurized in journey.With deionized water by ZrOCl2·8H2O is configured to the ZrOCl of 3.0mol/L2Solution 1000ml is standby With.By MgO-Cr2O3The test block that brick is cut into 40mm × 40mm × 50mm is put into vacuum tank, starts vacuum pump, until vacuum tank internal pressure Power is less than 0.01Pa, opens solution tank valve after pressurize 5min, salting liquid is made to enter in vacuum tank, until salting liquid is totally submerged Valve, then pressurize 5min are closed in test block, are then removed vacuum and are taken out test block, clean the solution of test block surface adherency rapidly, put Enter in drying box the strong wind under 110 DEG C of environment and dry 12h, places into electric furnace and be heat-treated through 600 DEG C.
Wherein, test block uses RH stove lower channel electric smelting in conjunction with MgO-Cr2O3Brick, chemical composition are by weight percentage： MgO 61.38%, Cr2O319.11%, Fe2O39.26%, Al2O35.32%, CaO 0.96%, SiO21.45%.Salt is molten Liquid uses the ZrOCl of technical pure grade2·8H2O makes, and chemical composition requires as follows：ZrO2+ Hf >=37%, SiO2≤ 0.004%, TiO2≤ 0.001%, Fe2O3≤ 0.001%, Na2O≤0.002%, remaining is deionized water.

Claims (3)

1. a kind of preparation method of magnesium Cr-Zr brick, which is characterized in that include the following steps：
1) by MgO-Cr2O3Brick is made quadrangular test block and is put into vacuum tank, and vacuum pressure inside the tank is made to be less than 0.01Pa, pressurize 5min or more opens solution tank valve, and the salting liquid of 1.5~3.0mol/L is made to enter in vacuum tank, until solution is totally submerged examination Block closes valve, then pressurize 5min or more, then removes vacuum and takes out test block, cleans the solution of test block surface adherency rapidly；
2) it is put into drying box at 110~115 DEG C strong wind and dries 12~14h, place into electric furnace at through 600~650 DEG C of heat Reason.
2. a kind of preparation method of magnesium Cr-Zr brick according to claim 1, which is characterized in that the test block is to use RH MgO-Cr of the stove lower channel electric smelting in conjunction with formation2O3Brick, the chemical composition of test block is organized by weight percentage to be become：MgO 57% ~62%, Cr2O319%~21%, Fe2O39%~11%, Al2O35%~6%, CaO 0.5%~1%, SiO21% ~1.5%.
3. a kind of preparation method of magnesium Cr-Zr brick according to claim 1, which is characterized in that the salting liquid uses work The ZrOCl of the pure grade of industry2·8H2O is made, and salting liquid chemical composition is as follows：ZrO2+ Hf >=36%, SiO2≤ 0.005%, TiO2≤ 0.001%, Fe2O3≤ 0.001%, Na2O≤0.002%, remaining is deionized water.
CN201810201067.XA 2018-03-12 2018-03-12 A kind of preparation method of magnesium Cr-Zr brick Pending CN108383506A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113105253A (en) * 2021-03-26 2021-07-13 江苏永钢集团有限公司 Zirconium-silicon-chromium-based ladle drainage sand and preparation method thereof

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113105253A (en) * 2021-03-26 2021-07-13 江苏永钢集团有限公司 Zirconium-silicon-chromium-based ladle drainage sand and preparation method thereof

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Application publication date: 20180810