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Method and device for testing liquid phase expansion capability of iron ore powder with size fraction smaller than 2 mm
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A technology of iron ore powder and liquid phase, which is applied in the field of sintering and can solve problems such as failure to effectively react with ore powder
Active Publication Date: 2014-12-24
武汉钢铁有限公司
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[0003] At present, the research on the sintering liquid phase performance of iron ore powder is mainly to study its liquid phase flow performance through small sintering equipment, and to analyze the liquid phase produced by different ore powders after processing to a finer particle size (for example: below 200 mesh). The natural flow effect of the phase affected by the viscosity, this method fails to effectively reflect the role of the main liquid phase particle size (below 2mm) in the mineral powder
[0004] To sum up, there is currently a lack of a method to test the liquid phase expansion ability of iron ore fines below 2mm
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Embodiment 1
[0048] Such as figure 1 As shown, the present embodiment provides a method for testing the liquid phase expansion ability of iron ore powder with a particle size below 2mm, including:
[0049] Step S101: pressing iron ore powder with a particle size of less than 2 mm into a round cake sample;
[0050] Step S102: placing the round cake sample in a quartz sinterer, wherein a plurality of corundum balls are installed in the quartz sinterer;
[0051] Step S103: sending the quartz sintering device into a heating furnace for roasting test;
[0052] Step S104: After the roasting test is finished, take the round cake sample out of the quartz sintering device;
[0053] Step S105: According to the number of corundum balls bonded to the round cake, determine the liquid phase expansion ability of the iron ore powder.
[0054] Further, step S101 includes:
[0055] Prepare iron ore powder with an alkalinity of 2.0 to 2.3 and a coal powder ratio of 5.0% to 6.0%, wherein the particle size...
Embodiment 2
[0087] Based on the same inventive idea, such as figure 2 As shown, the present embodiment provides a device for testing the liquid phase expansion ability of iron ore powder with a particle size below 2mm, including:
[0088] Stakeout platform 205;
[0089] The quartz sinterer 203 is placed on the lofting platform 205 , wherein a plurality of corundum balls 204 are installed on the quartz sinterer 203 .
[0090] Further, the device also includes:
[0091] The mesh bottom plate 206 is arranged between the setting out platform 205 and the quartz sintering device 203 .
[0092] Further, the device also includes:
[0093] The lifting rod 207 is connected with the lower end 205 of the lofting platform, and the lifting rod 207 can control the rising and falling of the quartz sintering device 203 .
[0094] Further, the lifting rod 207 is hollow inside.
[0095] Such as image 3 As shown, when testing the ability of iron ore powder to expand laterally in the liquid phase, the...
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Abstract
The invention discloses a method and a device for testing liquid phase expansion capability of iron orepowder with the size fraction smaller than 2 mm. The method comprises the steps as follows: the iron orepowder with the size fraction smaller than 2 mm is pressed into a cake sample; the cake sample is placed in a quartzsintering device, and a plurality of corundum spheres are mounted in the quartzsintering device; the quartzsintering device is sent into a heating furnace for calcination test; after the calcination test is finished, the cake sample is taken out from the quartz sintering device; and according to the number of the corundum spheres adhered on the cake, the liquid phase expansion capacity of the iron orepowder is determined.
Description
technical field [0001] The invention relates to the technical field of sintering, in particular to a method and a device for testing the liquid phase expansion ability of iron ore powder with a size below 2mm. Background technique [0002] Iron ore powder will produce a liquid phase during sintering, and the vertical and lateral expansion capabilities of the sintering liquid phase have a great impact on the air permeability, sintering speed, output and sinter quality of the material layer during the sintering process. The sintering liquid phase has a good lateral expansion ability while reducing the longitudinal flow, which is conducive to improving its process parameters and indicators, and most of the liquid phase in sintering is generated by the particle size below 2mm, so the iron ore below 2mm It is of great significance to analyze the flow and bonding effect of sintering liquid phase to study the liquid phase expansion ability of powder (especially fine-grained iron or...
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