Guiding experts: Huang Kaiguo, Gong Meiling, Zheng Guangxuan, Hu Jiyou, Gu Zhongxiang; Project leader: Ma Yongji, Hui Laishan
I. Introduction
XXXX commissioned by the company, Xian Zhou Mining Technology Development Co., Ltd. in November 2008 and December for a place beryllium ore mine in Xinjiang optional test, whose purpose is to test optional ore The research provides a set of economical and technically feasible process flow for the antimony ore, which provides a scientific basis for the development and utilization of the antimony ore.
Before the test, the commissioned unit provided a part of the process mineralogy data, including the original ore X-ray diffraction analysis, the sputum phase analysis and the rock and mineral identification. Through the above data and the later semi-quantitative analysis of the spectrum and chemical multi-element analysis, the The grain size distribution and embedding characteristics of the strontium minerals have been identified, and the ore structure and structure, rock structure and rock type have been identified, which enabled the researchers to have a clear understanding of the research on the strontium ore and played a guiding role in the formulation of the process.
The mineral composition more beryllium, substantially uniform, rock alteration phenomenon is more obvious, mainly of albite, chlorite, sericite and brown iron mineralization alteration phenomena. The occurrence of useful elements in ore is mainly hydroxysilicon vermiculite, followed by adsorption in the form of magnetite and limonite, and a small amount in the form of adsorption in kaolin , ill mica, green. Among the clay minerals such as mudstone, and a very small amount of the same phase in the same phase, it exists in the minerals of strontium and barium . The gangue minerals are mainly quartz , albite, potassium feldspar, sericite, chlorite, a small amount of minerals such as fluorite and limonite. The ore ore is mainly composed of medium-fine particles dominated by unequal-grained ore. The particle size of hydroxyapatite is 20 micrometers to 300 micrometers; hydroxysilicon vermiculite mainly exists in several forms: one is self-shaped and semi-self-self The form of the crystal form exists mainly in the fluorite vein; the second is that the hydroxysilicon vermiculite is wrapped in the fluorite vein and is often in linear contact with the fluorite particles. The fluorite veins are vein-filled in granite porphyry and rhyolite tuff . The difficulty in the selection of the mine is that the ore alteration is relatively strong, and the large amount of fine mud produced during the grinding process may affect the flotation process.
The test raw ore sample position Be 0.171%, because the strontium minerals mainly exist in the form of hydroxysilicon vermiculite, and the hydroxysilicon vermiculite is mainly distributed in fluorite. According to the ore properties, the experiment mainly uses flotation fluorite and floats at the same time. The process plan for selecting hydroxysilicon vermiculite is as follows: the grade of strontium concentrate is 3.07%, the recovery rate is 81.60%, and the yield of strontium concentrate is 4.55%.
Second, the beneficiation test
Test sample size sieve analysis: The purpose of this test is obtained by analyzing the ore samples with different fineness distribution of beryllium metal, providing the basis for testing fineness.
The test results are shown in Table 1.
Table 1 Particle size screening test results | ||||
Particle size (mm) | Yield(%) | Be grade (%) | Metal amount | Proportion (%) |
2 to 1 | 23.09 | 0.165 | 0.038 | 23.60 |
1 to 0.5 | 36.52 | 0.134 | 0.049 | 30.43 |
0.5 to 0.125 | 25.20 | 0.162 | 0.041 | 25.47 |
0.125～0.074 | 4.08 | 0.215 | 0.99 | 5.59 |
0.074~0.048 | 8.81 | 0.200 | 0.018 | 11.18 |
-0.048 | 2.30 | 0.247 | 0.006 | 3.73 |
total | 100.00 | 0.161 | 100.00 | |
It can be seen from the test results that the metal ruthenium is mainly distributed above 0.074 mm (ie, 200 mesh), but there is also a proportion of nearly 15% below 0.074 mm. The latter part should be treated accordingly.
Third, the test sample grinding fineness and curve test
The purpose of the test is to find out the grinding time required for the niobium mill to a certain percentage of -200 mesh by the fineness curve. The grinding fineness curve is the basis for the grinding fineness test.
The process flow of grinding fineness measurement is shown in the figure, and the results of grinding fineness test are shown in Table 2.
Grinding fineness determination process flow chart
Table 2 Grinding fineness results | ||||
Grinding time (min) | 10 | 15 | 20 | 25 |
- 200 mesh ratio (%) | 50 | 77.5 | 91 | 97.7 |
Fourth, the conclusion
(1) Summary of Process Mineralogy Research
The mineral composition of the antimony ore is more and more consistent, and the rock alteration phenomenon is more obvious. It is mainly characterized by alterations such as sodium-long petrochemical, chlorite, sericitization and limonite mineralization. The antimony-containing mineral is mainly hydroxysilicon vermiculite. Secondly, a small amount is present in the magnetite and limonite in the form of adsorption, and a very small amount is present in the clay mineral such as kaolin, ill mica and chlorite in the form of adsorption, and a very small amount is in the form of isomorphism. It exists in the minerals of strontium and barium. Hydroxysilane vermiculite is in the form of self-morphing semi-automorphic crystals, mainly distributed in fluorite veins; second, hydroxysilicon vermiculite is encapsulated in fluorite veins, often in line with fluorite particles. Contact relationship.
(2) Test results
The test was finally carried out using a rough, four-precision, three-sweep, and coarse concentrate re-grinding (-300 mesh accounted for 94%). Its indicators are: é“ refined ore grade 3.07%, strontium recovery rate 81.60%, strontium concentrate yield 4.55%.
(3) Quality of antimony concentrate
Through the quality analysis of the antimony concentrate, it is known that the antimony concentrate has reached the national standard secondary product requirements, and the impurities contained in the antimony concentrate (except F) are also in line with the national product quality requirements.
(4) This test sample is provided by XXXX Company. Through the ore dressing test, it provides an economical and technically feasible process for the antimony ore. This test can be used as a basis for the design of the concentrator.
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