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A method for rapid detection of total iron grade of hematite concentrate

A technology of hematite and iron grade, applied in the direction of specific gravity measurement, measuring devices, instruments, etc., can solve the problems of unfavorable environmental protection, unfavorable health of laboratory personnel, and long time consumption, so as to reduce the hazards of laboratory personnel and the environment, and significantly economical Benefits and social benefits, the effect of fast, simple and easy methods

Inactive Publication Date: 2018-09-28
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] First, it is necessary to dissolve iron with concentrated hydrochloric acid or hydrofluoric acid, and at the same time, it is necessary to use concentrated sulfuric acid to prepare sulfur-phosphorus mixed acid. destroy;
[0005] Second, the process of this method is complex, time-consuming and heavy workload;
[0006] Third, if the test samples are sent to the testing center for testing during the test, the cost is high; if the test is done by yourself, the purchase of sulfuric acid and hydrochloric acid needs to go through complicated procedures
[0007] Up to now, the iron ore concentrate total iron assay method to hematite that adopts at present has not only had a strong impact on the development of production, is also unfavorable for environmental protection, and this kind of situation has not been solved, so it is very necessary to invent a simple and easy Rapid detection method to realize the innovation and breakthrough of iron concentrate all-iron assay method

Method used

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  • A method for rapid detection of total iron grade of hematite concentrate
  • A method for rapid detection of total iron grade of hematite concentrate
  • A method for rapid detection of total iron grade of hematite concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The raw ore used in this embodiment is the raw ore of a hematite ore dressing plant, and the total iron grade is 29.45%.

[0035] Take 6 samples of raw hematite ore and put them into a mill for grinding. The grinding particle size is as follows: the first sample - 200 mesh accounts for 47.23%, the second sample - 200 mesh accounts for 55.18%, the third sample The ore sample - 200 mesh accounted for 62.37%, the fourth ore sample - 200 mesh accounted for 74.83%, the fifth ore sample - 200 mesh accounted for 88.24%, and the sixth ore sample - 200 mesh accounted for 97.36%. Weigh 3500g of each particle size, sort through the spiral chute twice, and then sample and test the obtained iron ore concentrate products after drying. .

[0036] Using the pycnometer method to measure the true specific gravity of the obtained different iron ore concentrate products, they were 3.85×10 3 kg / m 3 , 4.12×10 3 kg / m 3 , 4.37×10 3 kg / m 3 , 4.51×10 3 kg / m 3 , 4.67×10 3 kg / m 3 , 4.73...

Embodiment 2

[0040] The raw ore used in this embodiment is the raw ore of a hematite ore dressing plant, and the total iron grade is 21.78%.

[0041]Take 6 samples of raw hematite ore and put them into a mill for grinding. The grinding particle size is as follows: the first ore sample -200 mesh accounts for 41.58%, the second ore sample -200 mesh accounts for 54.31%, the third The ore sample - 200 mesh accounted for 64.14%, the fourth ore sample - 200 mesh accounted for 72.36%, the fifth ore sample - 200 mesh accounted for 85.71%, and the sixth ore sample - 200 mesh accounted for 94.59%. Weigh 4000g of each particle size, and sort through the spiral chute for 3 times. The obtained iron ore concentrate products are dried and then sampled for testing. The grades are 39.94%, 48.15%, 56.78%, 61.49%, 64.35%, and 67.18%. .

[0042] Use the pycnometer method to measure the true specific gravity of different iron ore concentrate products obtained, which are 3.47×10 3 kg / m 3 , 3.91×10 3 kg / m 3...

Embodiment 3

[0046] The raw ore used in this embodiment is the raw ore of a certain hematite ore dressing plant, and the total iron grade is 32.47%.

[0047] Take 6 samples of raw hematite ore and put them into a mill for grinding. The grinding particle size is as follows: the first ore sample -200 mesh accounts for 45.21%, the second ore sample -200 mesh accounts for 57.56%, the third The ore sample - 200 mesh accounted for 66.37%, the fourth ore sample - 200 mesh accounted for 74.18%, the fifth ore sample - 200 mesh accounted for 88.45%, and the sixth ore sample - 200 mesh accounted for 99.23%. Weigh 4000g of each particle size, sort through the spiral chute for 3 times, and then sample and test the obtained iron ore concentrate products after drying. The grades are 48.41%, 52.15%, 58.64%, 63.49%, 66.37%, 67.75% .

[0048] Using the pycnometer method to measure the true specific gravity of the obtained different iron ore concentrate products, they were 3.94×10 3 kg / m 3 , 4.11×10 3 kg...

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Abstract

The invention relates to a method for quickly detecting total iron grades of hematite concentrates and belongs to the technical field of iron ore detection. The method is used for detecting the total iron grade of hematite concentrates. According to the technical scheme, the method comprises the following steps: grinding the hematite raw ore into different particle sizes and sorting through a spiral chute, thereby acquiring the hematite concentrates in different grades; respectively measuring the true specific gravity of the products of hematite concentrates in different grades by using a pycnometer method; by taking the true specific gravity as a horizontal coordinate and the total iron grades of hematite concentrates as a vertical coordinate, acquiring a relation curve of the total iron grades of hematite concentrates and true specific gravity. In the production process, the hematite concentrates are sampled; the pycnometer method is used for measuring the true specific gravity; the above acquired curve can be utilized to find the corresponding total iron grades; the method is quick, simple and easy to implement; the detection result is accurate and reliable; the detection fees are ultralow; the method can be used for timely directing production; no chemical agent is used, so that the damage of chemical agents to the test personnel and environment is reduced. The method provided by the invention is an innovation in hematite concentrate detection and has obvious economic benefit and social benefit.

Description

technical field [0001] The invention relates to a method for quickly detecting the total iron grade of hematite concentrate, belonging to the technical field of iron ore detection. Background technique [0002] With the large-scale development and utilization of iron ore, the easy-to-select iron ore resources are gradually becoming increasingly scarce, and the reserve mines are obviously insufficient. The production and operation of the enterprise fell into a very difficult situation. In view of the increasing difficulty and cost of easy-to-select iron ore mining, the mining and utilization of hematite with considerable reserves has become an inevitable choice for the mining industry. At present, hematite has been widely used. However, compared with easy-to-separate ores, hematite has complex mineral composition and long process flow. Analyze and test iron ore concentrates to obtain daily production reports and guide production in a timely manner. [0003] At present, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N9/36
CPCG01N9/36
Inventor 张晋霞牛福生王玲徐之帅王龙
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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