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Method for coating crucible surface
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A surface coating and crucible technology, which is applied in the field of surface treatment of alloy steel crucibles, can solve problems such as easy cracks or ruptures, short service life of crucibles, uneven wall thickness of crucibles, etc., to improve performance, prolong service life, and enhance resistance Effect of High Temperature Oxidation Ability and Corrosion Resistance Ability
Inactive Publication Date: 2010-03-17
WUHAN IRON & STEEL (GROUP) CORP
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Abstract
Description
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Problems solved by technology
With a corundum crucible, the inner and outer surfaces of the corundum crucible are relatively smooth after coking without obvious damage, but the corundum crucible is prone to cracks or ruptures during use; with an alloy steel crucible, the inner surface of the alloy steel crucible is isolated by coal powder or coke powder after coking The part exposed to the air is relatively smooth without obvious damage, and there is i
Method used
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Embodiment 1
[0016] 1. Material preparation
[0017] 1 Substrate: alloy steel crucible
[0018] 2 coating materials:
[0019] Industrial pure aluminum: purity > 95%;
[0020] NaNO 3 : chemically pure
[0021] CrO 3 : chemically pure
[0022] KMnO 4 : chemically pure
[0023] Two-coat production method
[0024] 1 Soak the alloy steel crucible with 10% dilute hydrochloric acid for 10-30 minutes to remove rust;
[0025] 2. Take out the alloy steel crucible and put it into flowing tap water to rinse, and use pH test paper to detect the acidity of the water, so that the pH value of the rinsed water is the same as the pH value of tap water;
[0026] 3 Take out the crucible that has been rinsed with water and soak it in acetone solution for degreasing, and place the soaking device in a fume hood;
[0027] 4 Soak in acetone for a certain period of time, take it out and put it into running tap water again to rinse until the surface of the crucible is smooth;
[0028] 5 Take out the alloy...
Embodiment 2
[0035] Other steps are the same as in Example 1, wherein the temperature of the aluminum bath is 760° C. during the aluminum bath, the temperature of the air heating furnace is 900-980° C., and the time of the thermal diffusion treatment and diffusion treatment is 6 hours.
Embodiment 3
[0037] Other steps are the same as in Example 1, wherein the temperature of the aluminum bath is 740° C. during the aluminum bath, the temperature of the air heating furnace is 950° C. during the thermal diffusion treatment, and the time of the thermal diffusion treatment diffusion treatment is 5 hours.
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PUM
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Abstract
The invention relates to a method for coating a crucible surface, which comprises the following steps: (1) soaking a steel crucible into diluted hydrochloric acid to remove rust and to be cleaned; (2)soaking the crucible into acetone solution to remove oil; (3) after finishing soaking in the acetone, taking out the crucible and again putting the crucible into running tap water to be washed; (4) putting the steel crucible into mixed aqueous solution prepared by NaNO3, CrO3 and KMnO4 to be soaked; (5) putting the crucible into melting aluminium obtained by melting commercially pure aluminium tocarry out aluminium bath, and then cooling the crucible; and (6) putting the crucible into an air-heating furnace to carry out heating and diffusion treatment, then discharging, putting the cruciblein the air and cooling. By adopting the invention, the alloy steel crucible can have the properties of little proneness to be damaged and cracked, and thermo shock resistance, thereby the invention greatly prolongs the service life of the crucible, improves the properties of test units, and provides advantages for smoothly carrying out experimental studies.
Description
technical field [0001] The invention relates to a method for surface treatment of an alloy steel crucible used for refining coke in a laboratory, in particular to a method for coating the surface of the crucible. Background technique [0002] With the popularization and application of blast furnace intensified smelting technology, the skeleton effect of coke in the blast furnace has attracted more and more attention from iron-making and coking workers. There are many factors that affect the thermal properties of coke. When the coking process is fixed, selecting and applying coking coal and making reasonable coal blending are the main ways to improve the thermal properties of coke in pyrometallurgy. [0003] At present, due to the large variety and quantity of coking single coal commonly used in various coking plants, the experiment of refining crucible coke is often used for research, in order to evaluate the thermal properties of single coal coke and coke with different pro...
Claims
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Application Information
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