Talking about the practice of mineral processing technology management

I. Introduction

Strengthen the technical management of the normal production process of beneficiation, beneficiation to improve product quality, improve labor productivity, the cost of reducing consumption and mineral processing workers to operate and continuously improve the level of other aspects have a decisive impact.

Doing a good job in mineral processing technology management is a necessary condition for ensuring the normal operation of mineral processing. It is an important guarantee for the overall improvement of economic benefits of the mineral processing plant. It is an urgent task for modern mineral processing plant management to rely on the progress of mineral processing technology to comprehensively improve the economic benefits of mineral processing.

The practical experience of many advanced enterprises at home and abroad tells us that a company can improve its own technical management, and under certain conditions, production can proceed normally. On the other hand, if the technology management is weakened or eliminated, it will bring immeasurable losses to the enterprise. Therefore, the purpose of technology management is to ensure that the company can produce in a balanced, rhythmic and efficient manner, achieving the most cost and benefit. Jiahua.

Second, the technical management in the process of mineral processing

(1) For the selected plants with low dry magnetic separation and easy separation of waste rock and ore, pre-selection procedures should be established before the medium crushing, including hand selection, re-election and dry magnetic separation (magnetic pulley or magnetic roller) Wait, throw away some of the waste rock, so that the original ore grade can be improved, while reducing production costs.

For example, the Gutian Xichao molybdenum mine uses a hand-selected process to discard some of the waste rock. The average amount of waste rock is about 60 tons per day. The monthly production cost is more than 100,000 yuan, the average grade is increased by 0.2%, and the molybdenum concentrate is produced every year. 396 tons (processing capacity of 300 tons / day, grade 45%), annual output value of 30 to 50 million yuan. Dashi Shougang iron ore using a magnetic pulley preselected, waste rock yield of 8.0%, waste rock ore is 97.56%, the effect is obvious.

(2) Actively implement the principle of “breaking more and less grinding” or “breaking by grinding”, try to reduce the final crushed ore size, and strictly control the granularity of the ore entering the first stage of grinding.

According to statistics, in the mining enterprises, the energy consumption of the selected plants accounts for more than 70%, while in the energy consumption of the selected plants, the electricity consumption accounts for about 90%. In the energy consumption of the plant, the energy consumption for crushing only accounts for 20% to 23%, while the energy consumption for grinding operations accounts for 76% to 79%. Accordingly, in the actual production to maximize the crushing action crusher, the crushed product particle size to be reduced to 15 mm or even 12 mm or less, so that not only significantly reduce energy consumption and improve the processing capacity of the ball mill, significant economic benefits.

For example, the Shandong Gold Group Corporation Jiaojia gold, to crushing system has been modified, broken before the transformation product size of 14 mm, the amount of processing mill is 1250 tons / day, after the transformation broken product particle size to 12 mm, processing ball mill The capacity has increased to 1,350 tons/day, an increase of 8%, and the annual output value of the mine has increased by more than 14 million yuan (the original ore grade is 3.5g/t, and the gold price is 125 yuan/gram).

(3) Seriously do a good job in metal balance work.

The quality of metal balance work is an important criterion for measuring the quality of production management and technical management of the concentrator. Therefore, the concentrator should strengthen the training, education and management of technical test personnel, and strengthen the work of measurement, sampling, processing, and testing; The actual metal balance should be carried out once a month to find out the flow direction and causes of the metal loss, and take effective measures to improve the difference between the theoretical recovery rate and the actual recovery rate.

(4) Formulating reasonable consumption standards for various materials and proposing measures to reduce costs.

(5) Strengthening the testing of mineral processing.

The ore selectivity of the production site is tested to detect problems and guide production in time; when problems occur on the site, they can be verified and compared through small tests to find out the cause of the problem. For new pharmacy and new processes, first conduct an exploratory test in the laboratory, and consider semi-industrial or industrial tests based on the test results.

Third, the daily technical management of the concentrator

By doing daily technical management of mineral processing, we can continuously tap the potential of mineral processing, increase production, quality and recovery rate, continuously refresh various technical and economic indicators, reduce equipment accidents, improve environmental protection, and achieve safe, efficient and civilized production.

(1) Establish various technical management systems. Adhere to the principle of “equal quality of concentrate and metal recycling rate”, adhere to the technical operation of “uniform feeding, fine grinding, and selection”, adhere to “three degrees and one standard” for the flotation plant, ie concentration, fineness, pH and give The medicine is accurate.

1. Establish an ore management system. Understand and master the ore supply and ore properties of the mines in the mine (or Hangkou) in the current month. The conditional selection laboratory must complete the stop test from January to February in advance to provide a reasonable operating system and pharmaceutical system for the site. . If the grade changes greatly, it can be treated with ore.

2. Formulate a reasonable flotation reagent system and ball-filled steel ball filling rate and technical standards for adding steel balls or steel bars.

3. Formulate quality inspection standards and inspection systems for intermediate products. Such as crushing particle size and its particle size composition, crushing ratio; grinding concentration, graded overflow concentration, fineness and particle size composition; concentration of each sorting operation and grade of the selected product, grade and moisture of the final product; tailing grade And the particle size composition; the concentration of the concentrate in the concentrate and the allowable solid content in the overflow. Timely testing, discovering problems and communicating with the site in time, so that various process parameters meet the needs of production.

4. Conduct regular or irregular process inspections of the process, and identify problems and weak links in the process in time to take measures to improve or organize the research. The general grinding and floating workshop should conduct a process inspection every half to two years, and the crushing workshop arranges a process inspection every 2 to 3 years. It can also temporarily arrange partial or full process inspection according to the problems in production.

5. Conduct regular laboratory analysis and water quality comparison ore dressing test on production water to better guide beneficiation production.

6. According to the production practice, the residual ball in the ball mill should be cleaned at regular intervals, the broken ball should be removed, and the new ball should be added to ensure the effective ball filling rate in the ball mill.

(2) Establishing a sound technical responsibility system and post responsibility system

Under normal circumstances, the concentrator and workshop should have a chief engineer or a technician in charge, and bear direct responsibility for the technical work of mineral processing. Each concentrating plant must organize the establishment of a small ore dressing laboratory to make the scientific test work ahead of production and give full play to The role of engineering and technical personnel; the post responsibility system, equipment operation and maintenance procedures and safety production system are established in each production position, and strictly implemented.

(3) Strengthen equipment technology management, improve equipment maintenance system, actively implement the principle of “pre-repair-oriented”, strengthen equipment maintenance, improve equipment integrity and operation rate, maintain continuous stability of production and technology, and improve various mineral processing Technical indicators create conditions. In actual production, the technical indicators of mineral processing are closely related to the quality of the equipment. The fluctuation of technical indicators is largely directly or indirectly related to the equipment. Therefore, it is essential to strengthen the daily maintenance of the equipment and maintain the good running condition of the equipment. . For example, in the production of crushed ore, large ore is present in the product, mostly due to the damage of the screened sieve and the repair is not timely; when the flange of the flotation machine is worn so that the gap between the impeller and the cover is too large, the float will deteriorate. The selection effect seriously affects the flotation recovery rate.

Fourth, the conclusion

In summary, technical management plays an important role in mineral processing. We must not only pay attention to technical management in production, but also improve the level of technical management in practice, and gradually introduce new mineral processing chemicals, new processes and new ones. Equipment and advanced beneficiation technology to better serve the production and provide favorable technical support for the sustainable development of the mine.

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