Determination method for iron, aluminum, manganese, calcium, titanium, silicon and magnesium in casting powder
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A determination method and technology for mold slag, applied in the field of laboratory testing, can solve problems such as unfavorable personal health and environmental protection, unsuitable for rapid analysis and production, cumbersome analysis steps, etc. Accurate and reliable results and simple operation
Inactive Publication Date: 2017-08-08
TANGSHAN IRON & STEEL GROUP +1
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Due to the cumbersome analysis steps and long period of the above analysis method, it is not suitable for the current rapid analysis and production needs, and the above wet chemical analysis process requires a large amount of chemical reagents, which is not conducive to personal health and environmental protection
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Embodiment 1
[0045] The method for rapid determination of iron, aluminum, manganese, calcium, titanium, silicon and magnesium components in mold flux in this embodiment includes the following steps:
[0046] 1) Mold slag pre-decarbonization treatment: Weigh 0.2000g mold slag sample into a platinum crucible, put the crucible into a high-temperature muffle furnace at 750°C and burn for 10min, and pre-decarbonize the mold slag.
[0047] 2) Preparation of mold flux sample solution: add 1.4g of mixed flux to the pre-decarbonized and cooled sample, mix well, then cover with 1.0g of mixed flux, melt in a high-temperature furnace at 1000°C for 10min, take out and gently rotate the crucible, Let the melt cool and evenly hang it on the inner wall of the crucible. After the melt cools to room temperature, wash the outer wall of the platinum crucible with water, and place the platinum crucible in a beaker containing 100mL (1+1) hot hydrochloric acid solution. Heat the leached frit on an electric furna...
Embodiment 2
[0066] The method for rapid determination of iron, aluminum, manganese, calcium, titanium, silicon and magnesium components in mold flux in this embodiment includes the following steps:
[0067] 1) Mold slag pre-decarbonization treatment: Weigh 0.2500g mold slag sample into a platinum crucible, put the crucible into a high-temperature muffle furnace at 750°C and burn for 10min, and pre-decarbonize the mold slag.
[0068] 2) Preparation of mold flux sample solution: add 2.5g of mixed flux to the pre-decarbonized and cooled sample, mix well, then cover with 1.0g of mixed flux, melt in a high-temperature furnace at 1000°C for 12min, take out and gently rotate the crucible, Let the melt cool and evenly hang it on the inner wall of the crucible. After the melt cools to room temperature, wash the outer wall of the platinum crucible with water, and place the platinum crucible in a beaker containing 80mL (1+1) hot hydrochloric acid solution. Heat the leached frit on an electric furnac...
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Abstract
The invention discloses a determination method for iron, aluminum, manganese, calcium, titanium, silicon and magnesium in casting powder. The method comprises the following steps: melting a test sample, which is subjected to pre-carbon removal treatment, with a sodium carbonate-boric acid mixed flux; dissolving a leached and cooled melted block with hydrochloric acid and heating at low temperature to decompose the melted block; diluting to a specified volume; taking one part of the solution, atomizing the solution and introducing the atomized solution into an inductive coupling plasma optical emission spectrometer; measuring relative intensity of an element to be detected in the solution to a yttrium internal standard element at a selected wavelength; calculating the mass percent of each element to be detected according to a calibration curve manufactured by a standard solution. The determination method provided by the invention is an ICP (Inductively Coupled Plasma) light spectrum method and the content of various components in the casting powder is determined in one step; the determination method has an accurate and reliable measured result and is simple to operate; the dosage of reagents is greatly reduced and the analysis speed is improved by 70 percent or more, so that a determination period is greatly shortened, and comprehensive utilization of the casting powder and requirements of actual working in a production field are met.
Description
technical field [0001] The invention belongs to the technical field of laboratory testing, and in particular relates to a method for determining iron, aluminum, manganese, calcium, titanium, silicon and magnesium in mold flux. Background technique [0002] During the pouring process of molten steel, adding mold slag can improve the quality of cast slabs, prevent longitudinal cracks on the surface, absorb and dissolve inclusions floating from molten steel to the slag boundary, purify molten steel, and isolate air, effectively preventing secondary oxidation of molten steel and Heat is lost. Mold fluxes of different types and uses are derived from different steel types, different casting machines, and different continuous casting process parameters. By changing the composition of the mold fluxes, the crystallization and thermal resistance of the flux film can be controlled, thereby effectively Control defects on the surface of the slab. Therefore, it is of great significance ...
Claims
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