Method of treating manganese and iron manganese lean ore, there are three: First, mechanical processing, including washing, calcination, re-election, high intensity magnetic separation, flotation, roasting, etc.; Second Fire beneficiation, Hyperphosphate HSR When the refractory ore is used, the method of pyrometallurgical ore dressing is also called the manganese-rich slag method. The third is chemical beneficiation. When the quality requirements of the product components are very pure, and the above methods cannot meet the requirements, chemical purification is adopted. (chemical beneficiation) approach. Table 1  Compare Agate Hill manganese ore index project Main ingredients (%) m(Mn) m(P) Manganese recovery rate /% Mn Fe P m(Fe) m(Mn) Mechanical beneficiation Manganese oxide ore 17.23 27.00 0.039 0.637 0.0026 　 Roasting magnetic separation 27.13 11.52 0.038 2.35 0.0014 63.91 Pyrolysis Manganese oxide ore 17.51 41.20 0.02 0.424 0.0015 　 Manganese-rich residue 39.88 2.70 0.008 14.80 0.0002 85.00 (2) The product quality is good, mainly containing high manganese, high manganese-iron mass ratio and low phosphorus content. Table 2  Quality index of smelting manganese-rich slag in blast furnace Factory Name Main ingredients (%) m(Mn) m(P) Manganese recovery rate /% Mn Fe P m(Fe) m(Mn) Shanghai Iron and Steel Factory 35~42 1 to 2 0.05 13~38 0.0015 81～90 Xiangtan Manganese Mine 37.7 0.05 12.4 0.0013 82～88 Yingkou Ferroalloy Factory 35~37 1.5 0.005 24.1 0.0002 90 Agate Mountain Mine 39~40 2.7 0.008 14.8 0.0002 85 Dao County Refining Plant 36~40 1.5 to 3.0 0.008 13~24 0.0002 80～85 Donghuqiao Manganese Mine 38~42 1.0 to 2.0 0.03 21~38 0.0007 80～85 Huangyang Sizhi Refinery 40～45 1.5 to 3.0 0.025 15~27 0.0006 80～85 (4) The product has good physical properties, high manganese slag strength, and is not affected by environmental influences for long-term storage and long-distance transportation.
Material Selection:
1. Frame: 2MM thicknesses cold-roll Stainless steel.
2. Motor: Germany SEW brake motor (outer), power 0.75KW, power supply 220V.
3. Control system: Imported Japan Mitsubishi converter and PLC to control of electric box (150%1HZ)
4. Opening & closing speed: 0.6-1.5m/s (adjustable).
5. Safety Device: Korea Photocell Sensor, emergency stopping reaction when sensing obstacles.
6. Curtain: France high-density polyester fiber and the surface coating processing, thickness 0.8MM, variety colors can be chose: Red, yellow, blue, green, orange, gray, white, transparent, etc. Tensile strength: 4000/3500N/5cm, tear strength 600/600N. Fire-proofing level: German standard DIN75200 Usage temperature: -30 ° C +70 ° C.
7. Wind resistant: The Aluminium alloy Reinforce Girder to increase wind resistant effect.
8. Curtain replacement function: Aluminium alloy Reinforce Girder is loaded between 2 pieces Curtain, can be replaced easily if any curtain broken, save your cost.
9. Transparent window: 1.2MM thickness transparent PVC window, size and location is up to your request, more safer.
10. Seal: Seal brush are Installed inside the guides, and the special bottom design, to fit any uneven ground.
11. Cotrolling way: Push button + radar sensor, very convenient.
12. Limiting Switch: Mechanical limiting switch, easily and exactly.
13. Emergency STOP: With emergency stop button on control panel, can stop easily by
Hand once disconnect or accident
14 Fault recovery function: All Hongfa's production is with fault recovery function, system will self-recovery after power cut off.
15. Delivery time: About 7 business days with contract and deposit confirmed.
16. Pyament item: 50% before production, and the other 50% before shipment.
17. Warranty Details: We provide 12 months warranty for all doors and accessories (except man-made disasters, Irresistible natural disasters, ect^).
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The high manganese slag method is a pyrometallurgical method. It is a high-iron high-phosphorus refractory manganese ore that cannot be directly used for smelting. It is selectively reduced in a blast furnace or an electric furnace to ensure sufficient reduction of elements such as iron and phosphorus. Under the premise, the reduction of manganese is suppressed, thereby obtaining a manganese-rich slag having a high manganese and low phosphorus and a large m(Mn)/m(Fe) ratio. This is a method of enriching manganese ore in line with China's situation. Because China's manganese-rich ore is rare, high-iron and high-phosphorus-selected manganese ore accounts for more than 40% of China's manganese ore reserves. Manganese-rich slag in China has been vigorously developing countries, providing high-quality raw materials for the production of iron alloy.
Fire method beneficiation has the following advantages compared with mechanical beneficiation.
(1) The sorting effect is good, and it can deal with various types of manganese ore, especially for the high-iron high-phosphorus manganese ore with complex structure containing phosphorus and finely dip-dyed, and ferromanganese cemented. It is difficult to obtain good indicators by mechanical selection. The manganese-rich slag method works well (see Table 1).
(3) Manganese recovery is high, reaching 85%~90%, which is 5% higher than mechanical beneficiation (see Table 2).
The shortcoming of high manganese slag production is that smelting consumes a lot of coke and electricity, the production cost is slightly higher, the smelting process can only remove iron and phosphorus and other non-ferrous metals, can not remove gangue, and because coke is brought into ash, it also makes The amount of impurities increases.
The main uses of manganese-rich slag are as follows:
(1) It is used as a raw material for the production of manganese-silicon alloy. When smelting manganese-silicon alloy in electric furnace, the ratio of manganese-rich slag is generally 30%~40%, and the purpose is to adjust m(Mn)/m(Fe) of manganese raw material into the furnace. And m(P)/m(Mn). Since manganese-rich slag contains high SiO 2 , it is mainly used to produce manganese-silicon alloy.
The production of high silicon manganese silicon alloy, because the manganese content in the manganese-containing raw materials is required to be greater than 40%, iron is less than 1%, and phosphorus is less than 0.03%, almost all of the manganese-rich slag can be used to smelt qualified products.
(2) For the production of manganese metal by fire method, when manganese metal is produced by electrothermal method, all manganese-rich slag is used (w(Mn)>40%, w(Fe)<1%, w(P)< 0.03%) is used as a raw material, and a high silicon manganese alloy is used as a reducing agent.
(3) Ingredients for the production of electric furnace ferromanganese and medium and low carbon ferromanganese.
(4) Ingredients for smelting blast furnace ferromanganese. (3) In item (4), m(Mn)/m(Fe) and m(P)/m(Mn) are mainly transferred to the furnace raw materials to ensure that the product quality meets the requirements.