Mineral washing equipment quality appraisal

mineral washing equipment is based on the core principle of physical/chemical sorting and fluid mechanics synergy. By optimizing sorting efficiency, processing capacity and energy consumption control, it achieves synergy of ore enrichment, tailings emission reduction and water resource recycling rate. It is widely used in the mineral processing fields of iron ore, gold mine, rare earth ore and non-metallic ore. In the flotation process, it is used for the selective separation of sulfide ores and oxidized ores; in the field of gravity separation, it meets the density separation needs of placer gold/tungsten ore; in the magnetic separation process, it ensures the efficient enrichment of magnetic minerals. Compared with traditional mineral processing equipment, mineral washing equipment has the characteristics of intelligent control, long wear-resistant life and excellent environmental performance. It is the core equipment for the efficient development of mineral resources.

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

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

1. Dispute over performance indicators: the concentrate grade does not meet the standard and the consumption of chemicals exceeds the standard;

2. Material defects: the rubber lining of the flotation tank has insufficient wear resistance and the magnetic roller of the magnetic separator has attenuation of residual magnetism;

3, process problems: low cyclone classification efficiency, automatic dosing system delay;

4, contract performance dispute: core modules (such as X-ray sorting machine identification accuracy, intelligent control system version) are inconsistent with the technical agreement.

The litigation identification technical methods of mineral washing and separation equipment mainly include:

1. Appearance inspection: Check whether the size, structure, welding quality, surface coating, etc. of the equipment meet the standard requirements.

2. Performance test: According to the equipment specification, the performance indicators such as processing capacity, washing rate, recovery rate, and concentrate grade are tested.

3. Material analysis: Conduct material analysis on the parts of the equipment to check whether the materials meet the design requirements and whether there are defects.

4. Process flow analysis: Analyze the process flow of the equipment to determine whether it is reasonable and whether there is room for optimization.

A gold mine factory of the applicant signed a "Flotation Unit Procurement Contract" with an equipment manufacturer of the respondent, and the agreed gold recovery rate was ≥92%. After being put into production, the recovery rate was only 78%. The manufacturer argued that it was caused by the high oxidation rate of the raw ore.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of "mineral washing equipment", contract technical agreements, on-site investigation case materials and other data, and made the following quality analysis Opinion:

The aeration volume of the flotation machine of the mineral washing equipment involved in the case is only 1.2m³/min (agreement ≥2.0m³/min), the impeller speed deviation is ±15% (agreement ±5%); the wear of the rubber lining reaches 350mm³ (agreement ≤200mm³), resulting in a short circuit of the slurry.

The appraisal conclusion determined that defects in the equipment’s gas-liquid control system and materials were the main reasons for the insufficient recovery rate.

Mineral washing equipment quality appraisal report should include:

1, appraisal purpose and reference standards;

2, involved specifications, production batch number, construction record;

3, testing method Methods and equipment list;

4, correlation analysis of test data and failure;