Method for measuring iron ore crystal water content

A determination method and technology of crystal water, applied in the field of detection, can solve the problems of complex experimental equipment, burning loss analysis, high cost, and achieve the effect of accurate experimental data

Inactive Publication Date: 2008-12-24
SHIJIAZHUANG IRON & STEEL
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  • Abstract
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Problems solved by technology

At present, the general limonite crystal water determination method is carried out by differential thermal analysis equipment, that is: use a heating device to heat limonite, and then measure it according to the weight loss curve of iron ore. The disadvantage of this method is that the experimental equipment Complicated and expensive, most iron and steel enterprises are not equipped with this kind of experimental equipment, but only for burning loss analysis

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  • Method for measuring iron ore crystal water content
  • Method for measuring iron ore crystal water content
  • Method for measuring iron ore crystal water content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1. Take the ore sample A and put it into an oven for baking, the baking temperature is 100° C., and the baking time is 180 minutes. After taking it out, it is pulverized and sieved to obtain particle size samples.

[0019] Weigh 500g soil and 0.1g sample, record it as m 0 , put the sample into the reaction tube, cover the upper cover of the reaction tube tightly, and then put the reaction tube into the constant temperature zone of the heating furnace. The heating rate is 20°C / min. In order to prevent the re-oxidation of ferrous iron in the ore, nitrogen gas is supplied to the reaction tube at a flow rate of 2L / min for protection. When the temperature reaches 380°C, the flow rate of nitrogen gas is increased to 10L / min. When the temperature reaches 400°C, keep the temperature constant for 60 minutes; after the constant temperature is over, take out the reaction tube from the furnace, continue to flow nitrogen into the reaction tube, the flow rate is controll...

Embodiment 2

[0024] Embodiment 2. Take the ore sample B and put it into an oven for baking, the baking temperature is 120°C, and the baking time is 100min. After taking it out, it is pulverized and sieved to obtain diameter sample.

[0025] Weigh 500g soil and 0.1g sample, record it as m 0 , put the sample into the reaction tube, cover the upper cover of the reaction tube tightly, and then put the reaction tube into the constant temperature zone of the heating furnace. The heating rate is 20°C / min. In order to prevent the ferrous iron in the ore from being re-oxidized, nitrogen gas is supplied to the reaction tube at a flow rate of 3L / min for protection. When the temperature reaches 380°C, the nitrogen flow rate is increased to 10L / min, and the temperature is maintained 120min; after the constant temperature is over, take out the reaction tube from the furnace, continue to pass nitrogen gas to the reaction tube, the flow rate is controlled at 5L / min, stop the nitrogen gas flow when the e...

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Abstract

The invention provides a testing method used for measuring the water content of iron ore crystal water, which belongs to the field of detection technique and is used for solving the problems that the existing measuring equipments used for measuring the water content of the iron ore crystal water are complex and have high expense. The method of the invention consists of the steps as follows: preparing samples, samples entering the furnace, heating the samples, cooling the samples, and calculating the test results, etc. Based on the characteristic that the crystal water in limonite can be completely decomposed and the little carbonate in limonite is decomposed under the temperature of about 400 DEG C, the content of the iron ore crystal water is calculated according to the difference of the dried ore mass and the mass of the ore after the crystal water is overflowed; the method can utilize nationally specified coke reaction equipment generally used by current iron enterprises to carry out the measurement of crystal water of limonite, sufficiently plays the test functions of the existing equipments, and provides a feasible mean for self-measuring the iron ore crystal water for most iron enterprises without increasing other instruments. By the verification of a plurality of contrast tests, the method of the invention has the advantages of simpleness and feasibility, and exact test data.

Description

technical field [0001] The invention relates to a detection method, specifically a method for accurately measuring the crystal water content of iron ore by using coke reactive equipment, and belongs to the detection technical field. Background technique [0002] If iron ore contains high crystallization water, the impact on steel production is mainly manifested in the following two aspects: First, for mineral powder, the crystallization water in mineral powder used in sintering production does not participate in the final components of sintering ore, thus causing ore blending error, and after decomposition, the sinter cake will shrink greatly, which will affect the output and quality of sinter; go straight. Therefore, in order to better guide the production, the water of crystallization of the minerals used should be determined. At present, the general limonite crystal water determination method is carried out by differential thermal analysis equipment, that is: use a heat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
Inventor 张金福李杰赵金龙梁玫刘瑞宁胡连菊郑朝晖
Owner SHIJIAZHUANG IRON & STEEL
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