Anshan iron ore Waitoushan also belongs deposition metamorphic nature of the ore and iron ore Feng Jiayu similar nature, mineral processing plant designed annual processing of raw ore 5,000,000 t, tailings discharged from the main metal minerals are magnetite, pulse line Mainly quartz , actinolite, epidote and hornblende, the same fashion contains fine-grained monomeric iron minerals and poor continuous organisms, the iron grade is generally between 7% and 8%, and the emission concentration is 5% to 6%. Tailings chemical analysis, iron phase analysis, sieve water analysis and magnetic analysis are shown in Table 1, Table 2 and Table 3, respectively.
Table 1 Multi-element chemical analysis results (%)
Ingredients | TFe | SFe | FeO | SiO 2 | Al 2 O 3 | CaO | MgO | S | P | K 2 O | Na 2 O | Caustic soda |
Quality score | 7.91 | 5.96 | 4.63 | 72.42 | 3.32 | 3.93 | 4.67 | 0.092 | 0.095 | 0.73 | 0.66 | 2.63 |
Table 2 Iron phase analysis results (%)
Phase state | magnetite | False hematite | Red limonite | Iron carbonate | Pyrite | Iron silicate | All iron |
Iron mass fraction | 3.00 | 0.55 | 0.13 | 0.22 | 0.09 | 3.86 | 7.85 |
Distribution rate | 38.21 | 7.01 | 1.66 | 2.80 | 1.15 | 49.17 | 100.00 |
Table 3 Results of particle size analysis
Size/mm | Yield/% | Iron grade /% | Iron distribution rate /% |
+0.2 | 10.22 | 4.47 | 5.78 |
-0.2+0.1 | 30.16 | 6.24 | 23.62 |
-0.1+0.076 | 7.06 | 8.33 | 7.41 |
-0.076+0.050 | 13.50 | 10.09 | 17.08 |
-0.050+0.038 | 8.18 | 9.90 | 10.18 |
-0.038+0.030 | 1.94 | 9.05 | 2.26 |
-0.030+0.019 | 8.28 | 13.00 | 13.57 |
-0.019+0.010 | 8.90 | 6.77 | 7.54 |
-0.010 | 11.76 | 8.53 | 12.56 |
Total | 100.00 | 7.96 | 100.00 |
The plant also uses HS-φ1600mm×8 disc magnetic separator as the rough selection equipment for tailings re-election, and the selected coarse concentrate is weak magnetic separation-ball milling-magnetic pulse sink-double cylinder weak magnetic separation process. The process is shown in Figure 1. The high-quality iron concentrate with a yield of 2.46%, an iron grade of 65.76% and a recovery rate of 21.23% can be obtained. The annual output value is 5.787 million yuan and the profit and tax is 3.028 million yuan.
Figure 1 tailings re-selection process flow chart
New-designed RCM series of industrial chillers are capable of controlling precisely the mold temperature in plastic molding
process as so to shorten molding cycle and speed product formalization. The principle of heat exchange is adopted for cooling.
They can achieve rapid cooling, stable temperature controlling, and will be little effected by the surrounding factors. Therefore they
are necessary good equipments in modern industry.
1. Cooling temperature range 5-35 ℃.
2. High-capacity tube-in-shell evaporator with very good heat exchange performance especially under high ambient temperature condition.
3. Tube-fin double condensers with excellent heat transfer and rapid cooling.
4. Stainless steel warm-keeping tank.
5. R22 refrigerant to be used for efficient cooling.
6. R407 environment-friendly refrigerant is optional to use.
7. Overload protection for compressor, pump and blower.
8. Independent Temperature Controller, anti-freeze protection.
9. Phase sequence protection for control circuit, refrigeration loop controlled by high and low pressure switch.
10. Warm-keeping design for all piping to avoid partial convection.
11. Suitable for machine cooling in industries of plastics, electroplating, foodstuff, electronic products, bleaching and dyeing, ultrasonic.
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| Model | RCM3A | RCM5A | RCM8A | RCM10A | RCM12A | RCM15A | RCM20A | RCM25A | RCM30A | |
| chillling capaciity | KW | 7.5 | 12.5 | 18 | 23 | 28 | 36 | 46 | 58 | 72 |
| KCAL/H | 6450 | 10750 | 15480 | 19780 | 24080 | 30960 | 39560 | 49880 | 61920 | |
| Compressor type | Scroll compressor | |||||||||
|
Compressor outputpower |
HP | 3 | 5 | 8 | 10 | 12 | 15 | 20 | 25 | 30 |
| Refrigerant | R22/R407C | |||||||||
|
Refrigerant Filling quantity |
KG | 2 | 3 | 5 | 6 | 7.5 | 10 | 12 | 15 | 20 |
| Pump power | KW | 0.75 | 0.75 | 0.75 | 1.5 | 1.5 | 2.2 | 2.2 | 2.2 | 2.2 |
| Pump max.flowrate | L/MIN | 100 | 100 | 100 | 200 | 200 | 600 | 600 | 600 | 600 |
| Pipe size outlet | INCH | 1" | 1" | 1" | 1．5" | 1.5 | 1.5" | 2.5" | 2.5" | 2.5" |
| Pipe size outlet | INCH | 1" | 1" | 1" | 1．5" | 1.5 | 1.5" | 2.5" | 2.5" | 2.5" |
| Blower power | KW | 0.25 | 0.19x2 | 0.25x2 | 0.42x2 | 0.25x4 | 0.25x4 | 0.42x4 | 0.42x6 | 0.42x6 |
| Tank capacity | L | 56 | 65 | 113 | 129 | 173 | 173 | 271 | 350 | 400 |
| (L) | mm | 1090 | 1250 | 1350 | 1350 | 1700 | 1700 | 1900 | 2150 | 2150 |
| (W) | mm | 760 | 760 | 860 | 960 | 1200 | 1200 | 1200 | 1480 | 1480 |
| (H) | mm | 1250 | 1320 | 1560 | 1620 | 1750 | 1750 | 1750 | 1800 | 1800 |
Scroll Type Air-cooled Industrial Chiller
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