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Completion time: April 2007 Publisher: Guo Changqing Guiding Expert: Huang Kaiguo Gong Meiling Project Leader: Duan Zhu Report Pages: Foreword starting 42 pages
Introduction to the report:
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Report: Shandong somewhere titanium iron ore beneficiation Experimental Research Report format: word
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Foreword:
Entrusted by Shandong XXX Company, Xi'an Tianzhou Mining Technology Development Co., Ltd. conducted a mineral processing test on a ilmenite from Shandong from April 2 to 30, 2007. The purpose is to provide a basis for the development and utilization of the deposit.
The ilmenite deposits in magma mineralization occurs, and by the heteroaryl ultramafic magmatic rocks and augite Hornblendite phase control. Ilmenite mainly occurs in the pyroxene hornblende facies. The main metallic minerals: ilmenite, titanium small amount of magnetite, magnetite, and a small amount of hematite, pyrite, limonite. The main gangue minerals are: pyroxene, hornblende, apatite, biotite small amount. The ore contains TiO 2 9.04%, TFe 19.4%, P 2 O 5 0.52%, V 2 O 5 0.09%, Au 0.09 g/t.
The test was compared using four process protocols. The test results of different schemes are shown in Table 1.
Beneficiation test results of different process schemes Table 1
Process
Program
product
name
Yield
(%)
grade(%)
Recovery rate(%)
P 2 O 5
TFe
TiO 2
P 2 O 5
TFe
TiO 2
Floating-magnetic-heavy flow
Phosphate concentrate
1.28
31.82
1.74
1.07
76.89
0.12
0.15
Iron concentrate
7.93
64.00
7.65
26.31
6.78
Titanium concentrate
8.56
35.58
45.60
15.69
45.72
Floating-weak magnetic-strong magnetic-reselection process
Phosphate concentrate
1.28
31.82
1.74
1.07
76.89
0.12
0.15
Iron concentrate
7.93
64.00
7.65
26.31
6.78
Titanium concentrate
8.77
35.64
45.86
16.22
44.99
Magnetic-heavy
Process
Iron concentrate
7.40
64.70
6.59
24.92
5.57
Titanium concentrate
7.88
33.94
46.50
13.93
41.84
Heavy-magnetic-heavy flow
Iron concentrate
6.40
65.50
6.54
21.90
4.81
Titanium concentrate
5.90
34.40
45.30
10.63
30.70
Conclusion:
(1) A certain ilmenite ore in Shandong, the main metal minerals are: ilmenite, a small amount of titanium magnetite, magnetite, and a small amount of hematite, limonite, pyrite. The main gangue minerals are common hornblende, ordinary pyroxene, apatite, and a small amount of biotite.
(2) The ilmenite mineralization occurs in the late magma and is controlled by the ordinary pyroxene and amphibole facies in the ultramafic magmatic complex. The ilmenite is mainly composed of pyroxene and amphibole facies. Among them, a small part of titanium enters the amphibole and pyroxene lattices with the same type of crystal. In addition, pyroxene and hornblende are decolored to form microscopic blade-like, powdered ilmenite. The embedding feature of ore is one of the important reasons that affect the low recovery rate of titanium.
(3) The size of the ilmenite inlay is uneven, the coarse particles are distributed between the pyroxene and the hornblende particles, and the fine particles and the hornblende are symbiotic, which may cause difficulties in the recovery of ilmenite. The results of the -2 mm raw ore monomer dissociation test show that the ilmenite can reach all monomer dissociation at -0.05 mm. Therefore, it is necessary to finely grind the ore in the beneficiation process to obtain a partially qualified titanium concentrate.
(IV) The results of the original mineral phase analysis indicate that the iron in the ore is mainly distributed in the silicate gangue, and the non-recyclable iron accounts for more than 70% of the total iron content. Therefore, the iron recovery rate in iron concentrates cannot exceed 30%.
(V), the test uses four process flow schemes, the float-magnetic-heavy process flow and the floating-weak magnetic-strong magnetic-re-election process are tested in detail, and the phosphorus and ash are comprehensively recovered from titanium and iron. Stone not only removes the influence of harmful impurities phosphorus on titanium and iron concentrate, but also achieves the purpose of making full use of mineral resources.
(6) The use of re-election (shaker) can effectively recover ilmenite. However, due to the fineness of the ore, the fine-grained ilmenite is easily lost in the tailings, which affects the recovery rate of titanium.
(7) The loss rate of ore in the shaker is higher. The reason is that the medium ore has more connected bodies and the specific gravity is close. It is difficult to use the medium-mineral re-grinding and flotation recovery of ilmenite, which is difficult to use after re-grinding. (Shaker) can increase the titanium recovery rate by about 5%.
(8) The iron ore concentrate obtained by weak magnetic separation can only obtain iron concentrate with more than 64% iron grade after re-grinding, and no longer grind the selection after the original ore is milled to -200 mesh 85%. It is also difficult to improve the grade of iron concentrate.
(9) The weak magnetic tailings adopts strong magnetic separation, and the grade of titanium can be enriched to more than 20% from about 9%, but the loss of titanium in the strong magnetic tailings is higher. In order to increase the recovery rate of titanium, the magnetic field strength may be further increased, or the weak magnetic tailings may be finely ground and then subjected to strong magnetic separation.
(10), the ilmenite ore after the strong magnetic enrichment and re-grinding (shaker) process flow selection index and the weak magnetic tailings direct grading shaker indicators are basically the same, compared with the two selection process, strong Magnetic (including electrification) costs are higher.
(11) The grades of titanium concentrate and iron concentrate obtained by the re-election (shaker) process and the pre-magnetic post-heavy (magnetic-heavy) process of weak magnetic separation tailings are similar to the other two processes. , but the recovery rate is lower.
(12) Iron concentrate and titanium concentrate due to the large specific gravity, the sedimentation speed in water is very fast, and the sedimentation test is difficult to carry out. The final tailings were difficult to clarify for a long time due to the influence of the slime, and the sedimentation test could not be carried out.
(13) Due to the long test process, many process schemes are adopted and the time is short. The flotation test of ilmenite is for further study.
(14) The process plan adopted in this test and the obtained technical indicators provide reliable technical information for the development and utilization of the mine and the design of the plant. Compared with the same type of ore at home and abroad, the selection index is better, except titanium. In addition to the effective recovery of iron, phosphorus is also recovered comprehensively. From the perspective of environmental protection and reducing the cost of mineral processing, it is recommended to use a float-magnetic-heavy-heavy (middle-mine re-grinding) process.