Mining Magnetic Separator Quality Identification

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mining magnetic separator is based on the core principle of synergy between high-intensity magnetic field and mineral separation dynamics. By optimizing the magnetic field intensity, magnetic system wrap angle and separation efficiency, it achieves the synergy of ore grade improvement, tailings waste control and energy consumption optimization. It is widely used in the mineral processing fields of iron ore, manganese ore, titanium ore and rare earth ores. In iron concentrate production, it is used for efficient enrichment of hematite/magnetite; tailings re-selection to meet the resource recovery needs of low-grade minerals; non-metallic ore impurity removal to ensure the purity of quartz sand and other products. Compared with traditional magnetic separation equipment, mining magnetic separators have the characteristics of adjustable gradient magnetic field, long wear-resistant life, and intelligent control. They are the core equipment for efficient mineral separation.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide quality appraisal services for mining magnetic separators. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for the quality appraisal of mining magnetic separators.

As the grade of mineral resources declines, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance index dispute: the recovery rate of magnetic materials does not meet the standard, and the magnetic field strength is attenuated;

2, material defects: the coercivity of the magnetic roller neodymium iron boron material is insufficient, and the thickness of the wear-resistant coating ;

3, process problems: liquid level fluctuation in the sorting area, magnetic system adjustment mechanism stuck;

4, contract performance dispute: core modules (such as high gradient magnetic media, online metal detectors) are inconsistent with the technical agreement.

0 Such cases need to pass sorting efficiency testing, magnetic performance attenuation analysis and mechanical reliability verification to clarify the quality responsibility.

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1. Check the appearance and structure

Check whether the overall appearance, structural dimensions and component installation of the magnetic separator meet the design requirements.

2. Electrical performance test

Measure the voltage, current, power and other electrical parameters of the magnetic separator to check whether they comply with relevant standards.

3. Magnetic field intensity measurement

0 uses a gauss meter to measure the magnetic field intensity distribution in the working area of the magnetic separator to determine whether the magnetic field meets the ore separation requirements.

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24. Sorting performance test

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4 used standard mineral samples to conduct a sorting test to measure the performance indicators such as separation efficiency, recovery rate, and concentrate grade of the magnetic separator.

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65. Reliability test

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8Conduct a long-term running test on the magnetic separator, record fault occurrence time, frequency and other data to evaluate its reliability.

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An iron ore factory of the applicant signed a "Strong Magnetic Separator Purchase Contract" with an equipment manufacturer of the respondent, and it was agreed that the grade of iron ore concentrate should be ≥68%. After being put into production, the concentrate grade was only 62%, and the manufacturer argued that it was due to fluctuations in raw ore grade.

identification and analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "Mining Magnetic Separator", contract technical agreements, on-site investigation case materials and other data, and made the following qualitative analysis Quantity analysis opinion:

The actual magnetic field intensity of the magnetic roller of the mining magnetic separator involved in the case is 0.9T (agreement ≥ 1.2T), and the magnetic medium clogging rate is 30% (agreement ≤ 10%); the Hcj of the NdFeB material is only 18kOe (agreement ≥ 25kOe), and the magnetic attenuation rate exceeds the agreement value by 3 times.

The appraisal conclusion concluded that defects in the performance and maintenance design of the magnetic system were the main cause of the sorting failure.

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Mining magnetic separator quality appraisal report should include:

1, appraisal purpose (such as separation failure attribution, energy efficiency compliance verification) and reference standards;

2, equipment model involved, magnetic system parameters, operation logs;

3, detection method and equipment cleaning

26. Signature of the appraiser, qualification certificate of mineral processing engineer and official seal of the organization.

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