The production process of the ore dressing plant is: ore or open-pit mining ore (maximum block size 450 mm), which is broken by a two-stage closed circuit process, crushing the ore to less than 15 mm, and then sent to a closed circuit with a double helix classifier. The ball mill grinds and obtains a graded overflow with a particle size of -0.2 mm, which is distributed to two systems for flotation. The flotation process is a rough selection, a sweep and a selection (the original design is four selections). The dosage of the agent is (kg/ton of raw ore): sodium carbonate 2.63, water glass 0.91, oxidized paraffin soap 0.81. The flotation foam product is a phosphate concentrate, which is concentrated, filtered, dried and transported. The flotation tailings are demagnetized and magnetically selected to obtain vanadium iron concentrate, which is only concentrated and filtered. The magnetic separation tailings are sent to the tailings dam, and the clarified water is directly discharged.
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The ore is a basic-based ultrabasic rock-type apatite deposit. The main rock series are basic heterogeneous rocks composed of plagioclase, Suchangyan and gabbro, and are apatite and vanadium- titanium magnetite mineralization. . The shape of the ore body is more complicated.
The mine is divided into two belts, the south and the north. The north ore belt is 1,100 meters long and 2,500 meters wide. The south ore belt is 8,000 meters long and 150 meters wide. The entire mining area contains an average of 7.5% P 2 O 5 .
The ore type is mainly bulk and disseminated vanadium-titanium magnetite-apatite ore, followed by phosphorus-depleted vanadium ilmenite. Apatite minerals are mainly composed of vanadium-containing magnetite, ilmenite and plagioclase feldspar, amphibole fibers. Chlorite, pyrite, pyroxene, etc.
Apatite is fluoroapatite. The particle size is coarser, and more than 90% is more than 0.2 mm. evenly distributed. Most of them are embedded in minerals such as vanadium iron magnetite, ilmenite, fibrinite and chlorite in the form of individuals or aggregates.
Vanadium-bearing magnetite This is the main iron mineral and the most abundant mineral in the deposit. Single mineral analysis, containing V 2 O 5 0.75%, CoO.0032%, TFe 66.95%, TiO 2 5.42%. Its inlaid grain size is similar to that of apatite.
Ilmenite is the main titanium-containing mineral. Single mineral analysis, containing TiO 2 49.49%, V 2 O 5 0.0065%, Co 0.006%. There are two kinds of mineral forms: one is an irregular granular or granular aggregate embedded in vermiculite minerals with a particle size greater than 0.2 mm. More than 90%; the other is grid-like, with a small particle size.
Sulfur (drilling) The sulphur content of the ore is not high, but the minerals formed are extremely complex. To co mainly pyrite, brass ore followed. The drill is present in the pyrite in the form of a similar image, about 30-40%.
In 1972, the Beijing Research Institute of Mining and Metallurgy conducted laboratory tests on three types of ore samples (surface samples, tunnel samples, and core samples). The chemical composition of the ore used is (%): P 2 O 5 6.46~6.60, TiO 2 4.30~6.40, TFe18.16~22.45, V 2 O 5 0.14~0.21, Co0.0073~0.0085. Using flotation-magnetic separation-flotation combined process, phosphorus concentrate (grade 35% P 2 O 5 , recovery rate 94%) and vanadium iron concentrate (including Fe60%, V 2 O 5 0.65~0.7) %; recovery rate is 50~60% and 70~80% respectively), sulfur drill concentrate (including S 3 5%, Co 0.25~0.3%; recovery rates are 70% and 30% respectively) and titanium concentrate ( Containing YiO 2 is 45~48% and the recovery is 40~50%).
However, in the actual production process of the concentrator, only phosphate concentrate and vanadium iron concentrate are recovered. Its selection process principle process is shown in Figure 1. 
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Maying Phosphorus Ore Dressing Plant (1)
Ma camp phosphorus ore beneficiation plant, located north of Chengde City, Hebei Province Ma Yingcun. Started production in 1976. The scale is to process 300,000 tons of raw ore annually, with an annual output of 51,800 tons of phosphorus concentrate and 56,200 tons of ferro- vanadium concentrate. It is a medium-sized mining and selection joint enterprise in northern China.