CN105013595A - Beneficiation method for producing high-purity kyanite through low-grade kyanite - Google Patents
Beneficiation method for producing high-purity kyanite through low-grade kyanite Download PDFInfo
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Abstract
The invention discloses a beneficiation method for producing high-purity kyanite through low-grade kyanite, and belongs to the technical field of mineral processing. Low-grade kyanite ore is separated. When ore grinding is carried out, superfine magnetite powder is added, the single separation degree of the kyanite reaches more than 85%, strong magnetic separation is carried out on an ore grinding product, and weak magnetic separation is carried out on strong magnetic tailings, so that kyanite rough concentrate, and iron ore concentrate and tailings which can be recycled are obtained. Under the condition that the pH value ranges from 6.5 to 7.5, an inhibitor is phosphate starch, a collecting agent is a lauryl amine acetate and octanol combined flotation reagent, a one-roughing-two-concentration open floatation technological process is carried out, and a high-purity kyanite concentrate product with the purity larger than 95% and the Al2O3 grade larger than 60% is finally obtained. Generated roughing and two-time concentration tailings are combined together to serve as final tailings. The new technological process for flotation of the kyanite ore under the neutrality condition is provided, economic benefits are brought to a kyanite enterprise, corrosion to the device is further reduced, and the beneficiation method is of great practice significance in the sustainable development of the kyanite enterprise.
Description
Technical field
The invention belongs to technical field of mineral processing, be specifically related to the beneficiation method that high-purity kyanite produced by a kind of low-grade kyanite.
Background technology
China's blue spar ore aboundresources, but rich ore is few, mostly is the middle-low grade ore of mineral content 10%-25%, can need utilize after ore dressing.Scientific worker had carried out washability experimental study to most of kyanite deposit in the last few years, and had built up kyanite ore dressing plant at Xingtai, Donghai Area, Jiangsu etc.But owing to starting to walk evening, processing and utilization level is also lower.The problems such as the subject matter of current existence is that production cost is high, and Business Economic Benefit is low, and blue smart stone concentrate impurity high-quality is low, at home and international market lack competitiveness.Along with national economy is fast-developing, industrial department is no longer only quantitative growth to the needs of kyanite, but has had higher standard to quality, but China's Concentrated kyanite ore grade is substantially 50 ~ 55%, high-purity kyanite (Al
2o
3>60%) production is in blank substantially, high-quality kyanite need with mainly relying on the national import such as the U.S., South Africa, therefore strengthen domestic blue spar ore synthesis and meet domestic industry high standard demand, reduce this series products import dependence and improve mineral resources efficiency utilization having great importance.
The sorting purification technique of kyanite has magnetic separation, gravity treatment, flotation or its joint process, wherein flotation is the main method obtaining high-quality kyanite, but the production technology investigation of kyanite Mineral Processing Enterprises is shown, the flotation major part of actual kyanite is all produced under strong acidic environment, although the quality of kyanite is guaranteed, but larger unfavorable factor is defined to screening installation, production environment and operator, also becomes the biggest obstacle of kyanite manufacturing enterprise sustainable development.Therefore, for improving the technique of preparing level of China's kyanite mineral, increase China's product competitiveness in the international market, therefore must develop the new and effective mineral processing circuit of a kind of kyanite in neutral conditions flotation, sub-elect High Purity Concentrated kyanite ore product.
Summary of the invention
The present invention is directed to the deficiency in existing kyanite sorting technology, provide a kind of low-grade kyanite to produce the beneficiation method of high-purity kyanite.Blue spar ore stone mill ore deposit containing kyanite mineral 8%-15% is reached more than 85% to liberation degree of minerals, and before entering ore mill, super-fine magnetite powder is added by the ore deposit amount 2%-8% newly adding grinding machine, fineness accounts for 90% for-400 orders, the super-fine magnetite powder added can form magnetic group on the iron mineral surface of monomer dissociation, strengthens the magnetic of iron mineral.By ore pulp good for grinding by after the intensity magnetic separator of magnetic field intensity 480KA/m-640KA/m, obtain kyanite rough concentrate; Strong magnetic tail mineral products are the cylinder weak magnetic separator of 100KA/m-160KA/m through magnetic field intensity, and acquisition iron ore concentrate is back to grinding system and reuses, and all the other are as product from failing.Kyanite rough concentrate flows into size mixing device, pH value range is at 6.5-7.5, add inhibitor phosphate two starch, add lauryl amine acetate and the composite collecting agent of octanol again, through the open circuit flows technological process of one roughing recleaning, final acquisition purity >95.00% (Al
2o
3grade is greater than 60%) high-purity Concentrated kyanite ore product.The mine tailing of the rougher tailings produced, primary cleaning and recleaning is combined as true tailings product.
Technical scheme of the present invention is:
(1) to contain the kyanite ore of kyanite mineral 8%-15% for raw material, broken, ore grinding reaches more than 85% to the liberation degree of minerals of kyanite mineral, before entering ore mill, TFe grade 55%-62% is added by the ore deposit amount 2%-8% newly adding grinding machine, wherein MFe content is the super-fine magnetite powder of 90%-95%, and fineness accounts for 90% for-400 orders;
(2) pulp density that grinding is good is controlled at 25%-50%, after the intensity magnetic separator of magnetic field intensity 480KA/m-640KA/m, obtain kyanite rough concentrate; Strong magnetic tail mineral products are the cylinder weak magnetic separator of 100KA/m-160KA/m through magnetic field intensity, and acquisition iron ore concentrate is back to grinding system and reuses, and all the other are as product from failing;
(3) kyanite rough concentrate flows into size mixing device, pulp density controls at 25%-55%, pH value range is at 6.5-7.5, add inhibitor phosphate two starch 250g/t-600g/t, after stirring 3min-10min, add lauryl amine acetate and the composite collecting agent 150g/t-500g/t of octanol again, the two ratio is 2.5-5.5:1, the ore pulp mixed up enters flotation device, inflation starts flotation 5min-15min and obtains flotation rough concentrate, flotation rough concentrate first time is time selected, pulp density is 15%-30%, add through composite collecting agent 75g/t-250g/t, the two compares for 2.5-5.5:1, inhibitor phosphate two starch 100g/t-300g/t, it is selected that the Concentrated kyanite ore that primary cleaning obtains carries out second time, pulp density is 15%-25%, add inhibitor phosphate two starch 50g/t-100g/t, kyanite flotation is the open circuit flows technological process of one roughing recleaning, final acquisition purity >95.00% (Al
2o
3grade is greater than 60%) high-purity kyanite, the mine tailing of the rougher tailings of generation, primary cleaning and recleaning is combined as true tailings product.
Compared with the prior art, tool of the present invention has the following advantages:
(1) before entering ore mill, add super-fine magnetite powder by the ore deposit amount 2%-8% newly adding grinding machine, fineness accounts for 90% for-400 orders, strengthens weak magnetic mineral surface magnetism, make it to enter high intensity magnetic separation concentrate product, reduce some weak magnetic minerals and be mixed in kyanite rough concentrate product.
(2) in flotation operation, add phosphate two starch as inhibitor, this inhibitor serves stronger inhibitory action to kyanite, improves the effect of FLOTATION SEPARATION.
(3) collecting agent adopts lauryl amine acetate and octanol to form so that certain proportion is composite, and it is selective that composite reagent enhances in floatation process, and its flotation effect is than being used alone the effective of lauryl amine acetate.
(4) in flotation operation, pH value range is at 6.5-7.5, and flotation decreases the corrosion of strong acid to screening installation in neutral conditions, improves the security of operation.
Accompanying drawing explanation
Fig. 1 is principle flow chart of the present invention.
Detailed description of the invention
Embodiment 1
Primary raw material: kyanite raw ore; Phosphate two starch; Lauryl amine acetate; Octanol
Kyanite mineral content used is 12%, and gangue mineral mainly contains biotite, quartz, chlorite etc.
Kyanite is carried out fragmentation, ore grinding reaches 87% to the liberation degree of minerals of kyanite mineral, before entering ore mill, add TFe grade 60% by the ore deposit amount 5% newly adding grinding machine, wherein MFe content is the super-fine magnetite powder of 95%, and fineness accounts for 90% for-400 orders.
The pulp density that grinding is good is controlled 35%, after the intensity magnetic separator of magnetic field intensity 640KA/m, obtains kyanite rough concentrate; Strong magnetic tail mineral products are the cylinder weak magnetic separator of 120KA/m through magnetic field intensity, and acquisition iron ore concentrate is back to grinding system and reuses, and all the other are as product from failing.
Kyanite rough concentrate flows into size mixing device, and pulp density controls 30%, and pH value range is 7.0, and add inhibitor phosphate two starch 500g/t, after stirring 5min, then add lauryl amine acetate and the composite collecting agent 300g/t of octanol, the two ratio is 3:1.The ore pulp mixed up enters flotation device, inflation starts flotation 10min and obtains flotation rough concentrate, flotation rough concentrate first time is time selected, pulp density is 20%, adds composite collecting agent 150g/t, and the two compares for 3:1, inhibitor phosphate two starch 250g/t, it is selected that the Concentrated kyanite ore that primary cleaning obtains carries out second time, and pulp density is 20%, interpolation inhibitor phosphate two starch 100g/t.Kyanite flotation is the open circuit flows technological process of one roughing recleaning, final acquisition Concentrated kyanite ore product.The mine tailing of the rougher tailings produced, primary cleaning and recleaning is combined as true tailings product.
Through technique scheme, finally obtain purity 95.36% (Al
2o
3grade 60.45%) Concentrated kyanite ore.
Embodiment 2
Primary raw material: kyanite raw ore; Phosphate two starch; Lauryl amine acetate; Octanol
Kyanite mineral content used is 14%, and gangue mineral mainly contains biotite, quartz, chlorite, albite etc.
Kyanite is carried out fragmentation, ore grinding reaches 88% to the liberation degree of minerals of kyanite mineral, before entering ore mill, add TFe grade 61% by the ore deposit amount 7% newly adding grinding machine, wherein MFe content is the super-fine magnetite powder of 93%, and fineness accounts for 90% for-400 orders.
The pulp density that grinding is good is controlled 40%, after the intensity magnetic separator of magnetic field intensity 600KA/m, obtains kyanite rough concentrate; Strong magnetic tail mineral products are the cylinder weak magnetic separator of 140KA/m through magnetic field intensity, and acquisition iron ore concentrate is back to grinding system and reuses, and all the other are as product from failing.
Kyanite rough concentrate flows into size mixing device, and pulp density controls 25%, and pH value range is 7.0, and add inhibitor phosphate two starch 400g/t, after stirring 6min, then add lauryl amine acetate and the composite collecting agent 300g/t of octanol, the two ratio is 4.5:1.The ore pulp mixed up enters flotation device, inflation starts flotation 8min and obtains flotation rough concentrate, flotation rough concentrate first time is time selected, pulp density is 25%, adds composite collecting agent 150g/t, and the two compares for 4.5:1, inhibitor phosphate two starch 200g/t, it is selected that the Concentrated kyanite ore that primary cleaning obtains carries out second time, and pulp density is 20%, interpolation inhibitor phosphate two starch 80g/t.Kyanite flotation is the open circuit flows technological process of one roughing recleaning, final acquisition Concentrated kyanite ore product.The mine tailing of the rougher tailings produced, primary cleaning and recleaning is combined as true tailings product.
Through technique scheme, finally obtain purity 95.47% (Al
2o
3grade 60.57%) Concentrated kyanite ore.
Claims (1)
1. a beneficiation method for high-purity kyanite produced by low-grade kyanite, it is characterized in that:
A, with containing the kyanite ore of kyanite mineral 8%-15% for raw material, broken, ore grinding reaches more than 85% to the liberation degree of minerals of kyanite mineral, before entering ore mill, TFe grade 55%-62% is added by the ore deposit amount 2%-8% newly adding grinding machine, wherein MFe content is the super-fine magnetite powder of 90%-95%, and fineness accounts for 90% for-400 orders;
B, the pulp density that grinding is good is controlled at 25%-50%, after the intensity magnetic separator of magnetic field intensity 480KA/m-640KA/m, obtain kyanite rough concentrate; Strong magnetic tail mineral products are the cylinder weak magnetic separator of 100KA/m-160KA/m through magnetic field intensity, and acquisition iron ore concentrate is back to grinding system and reuses, and all the other are as product from failing;
C, kyanite rough concentrate flows into size mixing device, pulp density controls at 25%-55%, pH value range is at 6.5-7.5, add inhibitor phosphate two starch 250g/t-600g/t, after stirring 3min-10min, add lauryl amine acetate and the composite collecting agent 150g/t-500g/t of octanol again, the two ratio is 2.5-5.5:1, the ore pulp mixed up enters flotation device, inflation starts flotation 5min-15min and obtains flotation rough concentrate, flotation rough concentrate first time is time selected, pulp density is 15%-30%, add through composite collecting agent 75g/t-250g/t, the two compares for 2.5-5.5:1, inhibitor phosphate two starch 100g/t-300g/t, it is selected that the Concentrated kyanite ore that primary cleaning obtains carries out second time, pulp density is 15%-25%, add inhibitor phosphate two starch 50g/t-100g/t,
D, kyanite flotation are the open circuit flows technological process of one roughing recleaning, finally obtain purity >95.00%, Al
2o
3high-purity Concentrated kyanite ore product that grade is greater than 60%, the mine tailing of the rougher tailings of generation, primary cleaning and recleaning is combined as true tailings product.
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Cited By (4)
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| CN109111101A (en) * | 2018-11-01 | 2019-01-01 | 中钢集团马鞍山矿山研究院有限公司 | A kind of purification by mineral method of glass sand |
| CN111250243A (en) * | 2020-03-09 | 2020-06-09 | 北京矿冶科技集团有限公司 | Beneficiation method for comprehensively recycling various products from low-grade kyanite ore |
| CN112094128A (en) * | 2020-09-25 | 2020-12-18 | 南阳开元高温新材料有限公司 | High-strength mullite light heat-insulating brick |
| CN112125685A (en) * | 2020-09-25 | 2020-12-25 | 南阳开元高温新材料有限公司 | Low-heat-conduction mullite light heat-insulating brick |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109111101A (en) * | 2018-11-01 | 2019-01-01 | 中钢集团马鞍山矿山研究院有限公司 | A kind of purification by mineral method of glass sand |
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| CN111250243B (en) * | 2020-03-09 | 2021-09-14 | 北京矿冶科技集团有限公司 | Beneficiation method for comprehensively recycling various products from low-grade kyanite ore |
| CN112094128A (en) * | 2020-09-25 | 2020-12-18 | 南阳开元高温新材料有限公司 | High-strength mullite light heat-insulating brick |
| CN112125685A (en) * | 2020-09-25 | 2020-12-25 | 南阳开元高温新材料有限公司 | Low-heat-conduction mullite light heat-insulating brick |
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