Ling iron ore as brown as iron ore, due to the recovery from the low-grade iron ore, not beneficial in terms of chemical composition, so low requirements on the international market. Therefore, siderite ore is only used in some countries where other iron ore raw materials are limited or lacking in the godids family.
The process characteristics of the siderite ore are suitable for mechanical sorting because the ore has coarse-grained minerals that are well disintegrated when broken. The unfavorable condition is the mineral composition, which contains carbonates, silicates and limonite iron minerals, which are low-iron iron ore, chlorite, chlorite and iron hydroxide. Object. There are often some magnetites in the ore. The approximate ratio of the above minerals in the ore is: siderite 45-47, magnetite 9-12, iron hydroxide 13-18, and iron silicate 24%. Metallic minerals often have oolitic structure. Mineral particles ~2.5mm, and closely symbiotic. Non-metallic mineral quartz, stone and understanding apatite. The monomeric coarse-grained silicic acid content does not exceed 5 to 7%, and the remaining masonry is divided into silicates or forms fine-grained particles of rice.
Due to the higher alkalinity of such gangue composition, the value of the siderite ore is increased, and the optimum beneficiation concentration of the siderite ore material is reduced.
The beneficiation process and process of siderite ore can be attributed to re-election and roasting magnetic separation. In some concentrating plants in Yugoslavia, in addition to washing, re-suspension beneficiation has been widely promoted. Sorting the graded and only 3~0mm grain grade decoction materials. At the same time, the overflow of the desiccant equipment is nowhere available and is discharged to the tailings, while the 36% iron containing sand is shipped as a secondary product of the iron ore. The concentrate grade of the resuspension is varied from 395 to 44%, and depends on the mineral composition of the ore. When re-electing, the iron recovery rate is high, 89 to 92%.
A spiral classifier is used as a desliming device. Its grit is about 36% iron. The overflow iron content is 20-22%. An effective method for treating the siderite ore is to roast the magnet. In addition to preparing for the ore magnetic separation, it can also remove volatiles from the carbonate and limonite minerals, thereby significantly improving the quality of the commercial concentrate. The ore having a particle size of (30 to 70) to 0 mm is calcined in a rotary kiln, and the ore having a particle size of 30 (45) to 120 mm is calcined in a shaft furnace. The jaw crusher is more frequently crushed to such a particle size by an impact crusher , and the calcined ore is sieved and subjected to dry magnetic separation to obtain concentrate and tailings. The inspirational ore at the Sabinufu Concentrator is directly used for metallurgical treatment after being calcined.
The lower part of the sieve is sorted according to the re-election process before roasting; the re-suspension is used for the 45- to 6-mm grade in the West Grande Concentrator, and the jigging is used for the 6-0 mm; in the Sabinufu Concentrator The 30~0mm fraction is washed and sieved, while the undersize product and the washing machine overflow the hydrocyclone to remove mud. The refined iron grade obtained by the roasting magnetic separation and the combined beneficiation process is higher. It is 44 to 53%. The iron recovery rate of the ore is also satisfactory. More than 80%.
The characteristics of Mr. Concentrate are large burnout, which results in the re-election of concentrates close to 50%-52% of the roasting concentrate.
By roasting magnetic separation, the chemical composition of the concentrate is completely different from that of the ore due to the removal of volatiles and the separation of magnetically selected tailings. Since the basic oxide is present in the concentrate, the alkalinity thereof is 0.9% to 1.0. According to metallurgical value, these concentrates can be equivalent to 55% to 57% iron concentrates of magnetite or hematite.
1.Concrete Mixer is a small concrete mixer, the machine can be stirred plastic and hard concrete.
2. Concrete Mixer Machine price list in sri lanka has the advantages of novel structure, reliable performance, high productivity, good mixing quality, light weight, beautiful appearance, easy operation and maintenance, etc.
3.jzc350 with lift concrete mixer is a kind of advanced small-scale concrete mixer.
Diesel Engine Concrete Drum Mixer
Portable Concrete Mixer Machine,Diesel Engine Concrete Drum Mixer,Automatic Drum Mixer,Lifting Hopper Drum Mixer
Shandong Zeyu Heavy Industry Science and Technology Co.,Ltd. , https://www.zeyuconcretemachine.com