To the mountains pyrite beneficiation plant
Sulfur iron ore deposits of the type shown in Table 1, at home and abroad pyrite beneficiation indicators in Table 2.
The factory was designed by the Chemical Mine Design and Research Institute of the Ministry of Chemical Industry in 1961. It was put into operation in 1963. The designed ore processing capacity was 800,000 t/a, and the actual ore processing capacity was 600,000 to 700,000 t/a.
I. Ore nature: The ore is a medium-temperature hydrothermal filling in the continental volcanic rock series to replace the pyrite deposit, which belongs to the silicate type pyrite. The main metallic minerals pyrite and minor amounts of magnetite,
Table 1 China pyrite deposit type table
Surrounding rock type
Major metal minerals and gangue minerals
Sedimentary metamorphic pyrite deposit
Substantial sandstone , phyllite, argillaceous crystalline limestone, gneiss, etc.
Metallic minerals mainly pyrite, pyrrhotite followed, a small amount of yellow copper ore, galena, sphalerite. The gangue mineral is mainly quartz , with a small amount of mica , carbonaceous, calcite, etc.
Pyrites such as Dajiangping and Xingshutai
Copper-bearing pyrite deposit in metamorphic volcanic rocks
Fine Bijiao porphyry, quartz angle porphyry tuff, etc.
The metal minerals are mainly pyrite, followed by chalcopyrite, beryllium copper, galena, sphalerite. The gangue mineral is mainly quartz
White silver factory, pyrite and other fragrant ditch
Pyrite deposits produced in continental volcanic rocks
Andesite , trachyte , tuff, diorite, etc.
The metal minerals are mainly pyrite, and there are still a small amount of magnetite, hematite and trace amounts of chalcopyrite. The gangue minerals are mainly quartz and sericite, and there are still a small amount of chlorite, feldspar and carbonate minerals. Harmful impurities have a high fluorine content
Xiangshan, Mashan, Hejiaxiaoling, Longyou and other pyrite
Produced in the phosphate rock and sand shale deposit of pyrite
Limestone, sandstone, argillaceous limestone, shale, etc.
Metallic minerals are mainly pyrite, followed by pyrrhotite and trace lead-zinc ore, sometimes with a small amount of pyrite and magnetite. The gangue minerals are mostly calcite, dolomite and a small amount of quartz, sericite, garnet, barite and the like. Harmful impurities such as arsenic , fluorine, lead and zinc all exceed the allowable content
Pyrites such as Yuntaishan, Yanmenba and Xingtang
Skarn type pyrite deposit
Limestone, dolomite , sandstone, shale, diorite, granite, etc.
Metallic minerals pyrite, pyrrhotite and a small amount of magnetite, hematite, arsenopyrite, chalcopyrite, galena, sphalerite, chalcocite, bornite, bismuthinite scheelite mine. The gangue minerals are diopside , garnet, epidote, chlorite, serpentine, calcite, etc.
Pyrites such as Heishigang, Datian and Qingling
Veined pyrite bed
Various types of rock
The metal minerals are mainly pyrite, and there are still a small amount of galena, sphalerite, and chalcopyrite. The gangue minerals are mainly quartz, followed by feldspar, sericite and kaolin , and occasionally calcite, dolomite and graphite . Common fluorine exceeds general industrial requirements
Pyrites such as Jintan and Niujiao Bend
Sedimentary pyrite coal deposits
It is mainly produced in limestone and Permian coal-bearing strata, mainly composed of clay rock, followed by siltstone and tuff.
Metallic minerals pyrite and marcasite small amount, sometimes chalcopyrite, bauxite, mostly nodular, higher carbon content. The gangue minerals are clay and quartz; occasionally there are hydromica and chlorite. Harmful impurities: more than 0.05% fluorine, more than 8% carbon
Pyrites such as Dashu, Baishan, Yangquan, Songzi, Liujiashan, etc.
Pyrite deposit produced in phosphate
Crystalline limestone, dolomitic marble
The metal mineral is mainly pyrrhotite, with a small amount of pyrite, followed by arsenopyrite, galena, and sphalerite. The gangue minerals are quartz, feldspar, diopside, garnet, apatite, graphite, etc.
Pyrites such as Zhangjiagou, Ma House, Sanwang Village
Table 2 Domestic and international pyrite ore dressing indicator table
Ten thousand t/a
Deposit type and mineral composition
Process flow introduction
Mineral processing index, %
Xiangshan Pyrite Mine Concentrator
A pyrite deposit produced in a continental volcanic system. The mineral composition is mainly pyrite, containing a small amount of magnetite, hematite, and a trace amount of chalcopyrite. Sulfur is mainly produced in pyrite, and a small amount is contained in sulfate minerals such as alum , gypsum (content accounts for 37% of total sulfur). Harmful elements: low levels of lead, zinc and arsenic, and high levels of fluorine. Fluorine minerals are mainly fluorite
Crushed mine: three sections and one closed road; grinding: one section of closed road; flotation: one rough selection; pulp pH=8~9; dehydration: two sections
Longyou Pyrite Mine Concentrator
A pyrite deposit produced in a continental volcanic system. The mineral components mainly include pyrite, containing a small amount of sphalerite, galena, limonite, quartz, feldspar, sericite, talc , kaolin, chlorite, etc.
Crushed mine: two sections of open road; grinding: a closed circuit
Flotation: one rough selection (flotation column), pulp pH=7ï½ž8; dehydration: two sections
Yanmen Pyrite Mine Concentrator
Pyrite deposits produced in carbonate rocks and sand shale. The mineral composition is mainly pyrite, containing a small amount of pyrite, trace zinc blende, dolomite and a small amount of organic rock, quartz.
Crushed mine: three sections of open road; grinding: a closed circuit
Flotation: one coarse, two sweeps, pulp pH = 6.8 ~ 7.4
Wulian County Qibaoshan Pyrite Mine Concentrator
Pyrite deposits produced in carbonate rocks and sand shale. The mineral components are pyrite, carbonate, sericite, quartz, a small amount of pyrrhotite, magnetite, apatite, etc. and a small amount of gold and silver.
Crushed mine: two sections open
Grinding: a closed circuit
Flotation: one coarse, two sweeps, pulp pH=7ï½ž8; dehydration: sedimentation tank
Daejeon Pyrite Mine Concentrator
Skarn type pyrite deposit. The mineral components are chalcopyrite, sphalerite, pyrite, garnet, diopside, chlorite, tremolite , calcite, quartz, etc.
Crushed mine: a closed circuit; grinding: a closed circuit
Flotation: copper-sulfur mixed flotation, mixed concentrate plus lime-suppressed copper float, tailings plus activator CuSO 4 float sulfur dehydration: two sections
Tanshan Pyrite Mine Concentrator
Skarn type pyrite deposit. The mineral components are galena, sphalerite, pyrite, siderite, followed by magnetite, quartz, garnet, diopside, chlorite, calcite, clay, etc.
Crushed ore: two sections closed circuit; grinding: a closed circuit; flotation: lead, zinc, sulfur mixed flotation, lead and zinc separated from sulfur to obtain lead and zinc mixed concentrate; dehydration: two sections
Songzi Pyrite Mine Concentrator
Coal-sedimented pyrite deposits. The mineral composition is mainly pyrite, and there are still a small amount of pyrite, clay, carbonaceous, quartz, etc.
Crushed mine: reduced to 35 ~ 40mm; grinding: a rod mill. Re-election: rough selection of spiral groove, sweep selection of chute, rough selection of mining shaker
700 to 750 (1974)
Three types of sulfur deposits: limestone, limestone-clay and clay. The mineral components are natural sulfur , calcite, quartz, gypsum, dolomite, lapis lazuli, etc.
Crushed mine: two sections of open road plus rod grinding; grinding: a closed circuit; flotation: one coarse, three fine first concentrate, coarsely selected tailings graded and reground, after four times selected second concentrate
Hematite, localized with trace amounts of chalcopyrite. Sulfur content is 15.49%. Sulfur is mainly contained in pyrite. A small amount is contained in sulfate minerals such as alum, gypsum, etc. The content of harmful elements such as lead, zinc and arsenic is low, and the fluorine content is high, with an average of 0.298%. The mineral is mainly fluorite. Gangue mineral neutral plagioclase, kaolin, sericite, chlorite, muscovite, quartz, amphibole, apatite, actinolite, etc., of which kaolin is widely distributed. The ore contains more than 23% sulfur as rich ore, and 13% sulfur is lean ore; rich ore is dense block and powder, and the lean ore is mainly fine-grained. At present, according to the quality requirements of sulfur concentrate products, minerals and lean ore are required to be ore.
Ore inlay characteristics: Pyrite is mostly disseminated, scattered, crystal irregular, crystal form is small, mainly distributed in fine quartzite , and cemented with a small amount of sericite. The maximum particle size of the disseminated pyrite is 1.5 to 2 mm, and the minimum is 0.005 mm or less, and is generally about 0.1 mm. The pyrite with granular and blocky distribution is easy to select, and it is difficult to select in a scatter-like and opaque distribution. Gangue minerals such as clay kaolin, chlorite, sericite affect the sorting index. The raw ore is selected for about 7% moisture and contains 5% mud. Platts hardness: dense block pyrite f = 7, fine-grained loose pyrite f = 1 ~ 2, disseminated pyrite pyrite f = 3 ~ 4. The ore density is 2.6 to 2.8 t/m 3 and the bulk density is 1.69 t/m 3 . The multi-element analysis of ore is shown in Table 3.
Table 3 Ore multi-element analysis table
Fe 2 O 3
Al 2 O 3
K 2 O+Na 2 O
Second, the process: the mineral processing process is shown in Figure 1. The mineral processing technology indicators are shown in Table 4. The unit consumption indicators are shown in Table 5. The main equipment is shown in Table 6.
Figure 1 Process flow chart of Xiangshan Pyrite Mine Concentrator
Table 4 Mineral processing index table
Raw ore grade, %
Concentrate grade, %
Theoretical recovery rate, %
Actual recovery rate, %
Theoretical concentrate yield, %
Table 5 Unit consumption indicator table (according to the original mine)
m 2 /t
m 3 /t
1 Refers to downhole water, tailings water, concentrated concentrate overflow water.
Table 6 Main equipment table
Equipment name and specifications
PEF600Ã—900 jaw crusher
Î¦1650 standard cone crusher
Î¦2100 short head cone crusher
SZZ1500Ã—3000 hanging vibrating screen
MQG2700Ã—2100 lattice ball mill
2FLG-2000 double spiral classifier
XJK-2.8 flotation machine
TNB-24m peripheral drive concentrator
40m 2 external filter cylinder vacuum filter
40m 2 folding belt cylinder vacuum filter
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Third, the characteristics of the plant
(1) The original design was acidic flotation pH=4.5. In 1966, lime was used as the adjusting agent to change to alkaline flotation pH=8ï½ž9, the effect is very good, and the experience has been widely promoted in the national sulfur iron ore dressing plant;
(2) The production water is water from underground water, tailings backwater, concentrated concentrate overflow water, concentrated water in the plant and purified by lime;
(3) The wastewater treatment is better and meets the national wastewater discharge standards;
(4) Partial grinding and grading system realizes automatic detection and adjustment of ore, concentration and fineness;
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(5)) The concentrating machine discharges the compressed air to automatically control the ore discharge valve to stabilize the filter to feed the mine;
(6) Adding a CYT magnetic separator to comprehensively recover iron from the flotation tailings.
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