On-site technical transformation - Fushan Copper Mine Plant
The production and processing plant of Fushan Copper Mine was put into operation in July 1971 to 1978. The average production index only reached: the recovery rate was 89.23%, and the concentrate grade was 15.54%. The production indicators of the past few years have fluctuated greatly. figure 1 In view of the low on-site production index and large fluctuation range, the mine organization technical team, while testing, found the main weak links in production during the production inspection: (1) After the process investigation, the rough sweeping time was not enough. (2) It is not suitable for re-grinding in the middle mine. (3) The grain size is selected. From the small grinding fineness test, the recovery rate increases gradually with the increase of -200 mesh content. When the -200 mesh exceeds 70%, the increase rate of recovery is obvious. gentle. (4) The condition of the flotation reagent is disordered and the place of addition is improper. [next] figure 2 The ф1200×1800 mill originally used for re-grinding in the middle mine is equipped with a ф350 mm cyclone to form a closed-circuit control. The selected fineness-200 mesh is increased from about 65% to 70-72%, and the copper mineral is fully solved. from. At the same time, the flotation operation conditions are stabilized, and the ball is reasonably matched with a section of the mill, so that the flotation index is greatly improved. Dosage Product    Yellow medicine (g/T) No. 2 oil (g/T) Lime (kg/T) Pulp waste pH      Species use the amount change  leather  before 125 120 5 Add as appropriate 9~11 change  leather  Rear 75 70 3 " 11.5 After the process reform, the production practice in the past two years proves that it is technically feasible and economically reasonable; and obtains satisfactory production indicators (see table below). However, it is still necessary to study and further improve the grade of concentrate. Annual average production indicators before and after the reform process after Raw ore grade Concentrate taste Recovery rate Remarks Before reform 77 0.74 15.44 90.49 78 0.63 17.78 91.62 After reform 79 0.72 21.65 93.28 Sales grade 80 0.686 22.43 93.09 Sales grade Desktop Laser Machine
UT-1490/1610/1325/1318, etc.
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Desktop Laser Machine Desktop Laser Machine,Desktop Laser Cutter,Desktop Laser Cutting Machine ,Desktop Laser Engraving Machine Shandong U-May CNC Technology Co., Ltd. , https://www.sesamecnc.com
Fukuyama is a copper solution was warmed account the type of copper-based copper deposits, ore selected to suicide graphite marble type, mainly metallic minerals chalcopyrite and pyrite. Chalcopyrite is mainly in the form of aggregates or fine veins, and is also in the form of small droplets. Pyrite is generally in the form of granules or aggregates that are associated with other sulphides to form fine veins and even small veins. The ore contains about 1.5% of graphite carbon, mainly in the form of fine phosphorus flakes and cryptocrystalline, causing great interference in the flotation. The original ore copper grade is low, fluctuating from 0.42 to 0.74%, and the sulfur content is generally 1.8 to 3.8%, with an average of 2.2%.
1. Process and existing problems before the transformation 71~78 years: The process of flotation adopts one coarse, two sweep, three fine, and medium mine regrind, as shown in Figure 1.
2. Main technical measures and indicators (1) Reforming the grinding and floating process to improve the selected grinding fineness At the beginning of the year, the medium-mine re-grinding process was transformed into a two-stage grinding one-time selection, as shown in Figure 2.
(2) Increase the flotation machine to extend the flotation time and extend the original rough sweeping flotation time from 12.5 minutes to more than 18 minutes: Select (4A) from 3 to 4 times, the recovery rate and the uniform ratio of concentrate grade Before the increase of 2.11% and 3.72%.
(3) Reforming agent addition method Stabilizing agent dosage The addition of oil medicine was changed from manual to self-made electronic numerical control machine, which stabilized the dosage and accuracy of the medicine, eliminated the loss, saved the dosage of the medicine (see the table below), and improved the sanitary condition. name Weigh Means year     Standard limit  
UTECH Desktop Mini Laser Engraver is equipped with Texas 32 Bit DSP control system, there is a Flash memory on the mother board, you can download the work file to the machine via USB cable.
Mini Laser Engraver is most suitable and the preferred choice of equipments in industries such as advertisement, gifts, shoes, toys, and etc.
Desktop Laser Engraving Machine feature:
1. Adjustable Speed and Power, Smooth and Precise Engraving and Cutting
2. USB Interface
3. Air Assist, Remove heat and combustible gases from the cutting surface.
60W Air pump
4. Embedded Exhaust Fan, Easier intall, Safer transport.
40W exhaust fan, flow can be 5.27m³\Min.
5. Rotary Axis, Engrave any cylindrical object.
6. Aluminum table platform, Leave no chippings on working area.
7. LCD english Panel and DSP control system, easy to operate
8. Water Cooling and Protection System.
The tube will not work without water, to protect laser tube.
9. Advanced Red cross position. easy to identify laser position.
10. Emergency Stop Button.
11. Lift handle on side, easy to lift the machine.
12. Manual or Electircal up down table optional
13. Taiwan Imported Hiwin linear rail transmission
14. Laser focal length: 50.8mm
15. Limit switch on front door & laser tube cover, once open any cover, it will stop work.
16. Machine service life: 1000-1500H for laser tube, 3-5 years for machine body.
Available Industries:
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Customized model:
Model
UT-2030/3050/4060
Laser tube
Water cooling Co2 sealed glass
Control system
32 Bit DSP with Flash memory
Drive type
Stepper motor
Laser Power
50W/60W
Working Size (mm)
200*300/300*500/400*600
Adjust Table (mm)
200
Max speed
800 mm/s
Image form
Plt, Dxf, Bmp, Ai, Dst
Resolution
1000 DPI
Repeatability
0.01 mm
PC Interface
USB 3.0 and USB Disk
Power
110~240V/ 50~60Hz
Warranty
12 Months