CN100448545C - High-iron gibbsite material grinding process - Google Patents
High-iron gibbsite material grinding process Download PDFInfo
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- CN100448545C CN100448545C CNB2005102005617A CN200510200561A CN100448545C CN 100448545 C CN100448545 C CN 100448545C CN B2005102005617 A CNB2005102005617 A CN B2005102005617A CN 200510200561 A CN200510200561 A CN 200510200561A CN 100448545 C CN100448545 C CN 100448545C
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Abstract
The present invention provides a high-iron gibbsite material grinding process which adopts a scheme of a section of rod mill matching with a hydraulic cyclone separator, namely that bauxite ores from a grinding head barn and circulating mother liquor from an evaporation station are proportionally added in the rod mill; ore pulp from the mill flows into a middle pulp pool and is matched with the circulating mother liquor so as to be delivered to the hydraulic cyclone separator, grading bottom flow returns to the rod mill for continuous ore milling, and grading overflow is delivered to a dissolution procedure. With the technical method provided by the present invention, the fineness of ore milling products is completely more than 20 meshes, and the obtained products have uniform granularity. The technical method can assure that the dissolution performance and the precipitation performance of the high-iron gibbsite materials can both satisfy technical requirements and can protect ores from being over-ground, and the mill has the advantages of high productivity and low energy consumption.
Description
Technical field:
The present invention relates to the high-iron gibbsite material grinding process in the alumina producing.
Background technology:
China's alumina producer mainly is raw material with the diaspore, Shandong Aluminium Industrial Corp, Shandong Chiping alumina producer also use external bauxite trihydrate to be raw material, in process of production, because ore type difference, the dissolving out capability difference is bigger, also different to the fineness requirement of material grinding, so the grinding process of each alumina producer difference to some extent.The grinding process of domestic alumina producer mainly contains three kinds:
(1), one section ball milling grinding process scheme: to dissolving out capability bauxite preferably, the grinding particle size that requires is thicker, usually select one section ball milling to join the closed circuit grinding flow process of spiral classifier or hydroclone classification, as use the Shandong Aluminium Industrial Corp, Shandong Chiping alumina producer etc. of external bauxite trihydrate to be representative.The mog of one section ball milling is usually about 160 orders.
(2), the grinding process scheme is ground in two storehouses: this scheme is mainly used in domestic diaspore ore, raw material mill specification is longer, be divided into two ore grinding storehouses, first storehouse is corase grind, milling medium is the steel section, second section is fine grinding, and milling medium is a steel ball, has spiral classifier or the hydrocyclone closed circuit grinding flow process as classifying equipoment.Use producer to be representative with Guizhou Aluminum Factory and several small scale aluminum oxide factory.This scheme mog is generally-63 μ and accounts for 65～75%.
(3), two sections mill grinding process schemes: this scheme is mainly used in the molten diaspore ore of domestic difficult tribulation, grinding process is divided into independently two sections, roughly grind for rod mill for first section, bauxite is ground to about 1mm, second section is fine grinding, bauxite is milled down to-63 μ and accounts for 70～78%, grinding flowsheet adopts rod milling open circuit, ball milling closed circuit, the closed circuit grinding flow process of ball milling water distribution power cyclone classification.Use producer to be representative with Pingguo, Guangxi aluminium manufacturer, domestic other newly-built alumina producers are also in this grinding process scheme of use at present.
External all alumina producers are in ore grinding workshop section, also use a kind of in above three kinds of process programs.
For the high-iron gibbsite of provinces and regions, China south, find that by test mog is about 20 orders (850 μ), digesting efficiency of alumina can reach 58～60% in the ore, continuing does not levigately have benefit to digesting efficiency of alumina, causes the red mud refinement on the contrary, the SiO in the ore
2Can participate in chemical reaction in a large number, be unfavorable for the red mud separate and subside, and cause alkaline consumption to increase.
By experimental study and production practices analysis, existing three kinds of grinding process schemes, all about 200 orders, mog is too thin for mog, can not satisfy the mog requirement of Guigang, Guangxi high-iron gibbsite.
Summary of the invention:
The objective of the invention is to: propose a kind of new material grinding process, can satisfy the high-iron gibbsite mog requirement of Guigang, Guangxi, can improve mill output again, cut down the consumption of energy.
The present invention is achieved in that the process program that adopts one section rod mill water distribution power cyclone classification, promptly the bauxite that comes from the bistrique storehouse and the circulating mother liquor that comes from evaporate station are that 0.8～1.0 ratio adds the rod mill in liquid-solid ratio L/S, the ore pulp that comes out from grinding machine flows into middle stock tank, allocate again that to contain admittedly be that the circulating mother liquor of 300～450g/l is sent to hydroclone classification into, classification underflow returns and continues ore grinding in the rod mill, and the classification overflow is sent to the stripping operation as the product of this operation.
Rod mill used in the present invention belongs to corase grind equipment, and the milling medium of dress is a rod iron in the grinding machine storehouse, and ore adds in the grinding machine, be sandwiched between rod and the rod by levigate, be the line contact relation between rod and the rod, have the function of selective milling, mog is in 0.8～1mm scope.
Ore grinding liquid-solid ratio L/S in the rod mill is 0.8～1.0, and the sand return amount is 150～250%.
The hydrocyclone feed pressure is controlled at 0.1Mpa, and it is 300～450g/l that the hydroclone classification charging contains admittedly, and it is 900～1100g/l that the hydroclone classification underflow contains admittedly, and it is 250～400g/l that the hydroclone classification overflow contains admittedly.
Because the used rod mill of the present invention has the selective milling function, when the thickness ore passes through rod together, coarse granule at first is sandwiched between rod and the rod by levigate, and fine grained passes from crack, the product granularity that ore grinding is obtained is even, overground phenomenon can not take place, and compares with one section ball milling scheme, the rod mill energy consumption is lower, and the grinding machine production capacity is also bigger.
Adopt the process of one section rod mill water distribution power cyclone classification provided by the invention, the ore milling product fineness is 100% by 20 mesh sieves, the product granularity that obtains is even, can guarantee that high-iron gibbsite stone dissolving out capability and settling property all satisfy technological requirement, guarantee that ore is not overground, grinding machine production capacity height, saving energy.
Description of drawings:
Fig. 1 is one section rod milling closed circuit grinding process chart.
The specific embodiment:
Embodiments of the invention: the bauxite that comes from the bistrique storehouse (ore grain size is 13～25mm), with the circulating mother liquor that comes from evaporate station be that 0.9 ratio adds the rod mill in liquid-solid ratio L/S, ore grinding liquid-solid ratio L/S is 0.8～1.0, the sand return amount is 200%.Stock tank in the middle of the ore pulp that comes out from grinding machine flows into allocates that to contain admittedly be that the circulating mother liquor of 300～450g/l is sent to hydroclone classification into again, and it is 300～450g/l that the hydrocyclone charging contains admittedly, feed pressure 0.1Mpa.It is 900～1100g/l that the hydroclone classification underflow contains admittedly, returns and continues ore grinding in the rod mill, and it is 250～400g/l that the hydroclone classification overflow contains admittedly, is sent to the stripping operation as the product of this operation.
Claims (5)
1. high-iron gibbsite material grinding process, it is characterized in that: the bauxite that comes from the bistrique storehouse and the circulating mother liquor that comes from evaporate station are that 0.8～1.0 ratio adds the rod mill in liquid-solid ratio L/S, the ore pulp that comes out from rod mill flows into middle stock tank, allocate again that to contain admittedly be that the circulating mother liquor of 300～450g/l is sent to hydroclone classification into, classification underflow returns and continues ore grinding in the rod mill, and the stripping operation is sent in the classification overflow.
2. high-iron gibbsite material grinding process according to claim 1 is characterized in that: the milling medium of dress is a rod iron in the employed rod milling cabin, is the line contact relation between rod and the rod.
3. high-iron gibbsite material grinding process according to claim 1 is characterized in that: ore grinding sand return amount is 150～250%.
4. high-iron gibbsite material grinding process according to claim 1 is characterized in that: it is 900～1100g/l that the hydroclone classification underflow contains admittedly; It is 250～400g/l that the hydroclone classification overflow contains admittedly.
5. high-iron gibbsite material grinding process according to claim 1 is characterized in that: hydrocyclone feed pressure 0.1Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005102005617A CN100448545C (en) | 2005-09-23 | 2005-09-23 | High-iron gibbsite material grinding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005102005617A CN100448545C (en) | 2005-09-23 | 2005-09-23 | High-iron gibbsite material grinding process |
Publications (2)
| Publication Number | Publication Date |
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| CN1739857A CN1739857A (en) | 2006-03-01 |
| CN100448545C true CN100448545C (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005102005617A Expired - Fee Related CN100448545C (en) | 2005-09-23 | 2005-09-23 | High-iron gibbsite material grinding process |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105750060B (en) * | 2014-12-16 | 2018-06-08 | 沈阳铝镁设计研究院有限公司 | A kind of bauxite dry and wet mixing grinds new process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5897063A (en) * | 1995-04-04 | 1999-04-27 | Krupp Polysius Ag | Method of comminuting ore material |
| CN1049875C (en) * | 1996-11-15 | 2000-03-01 | 山西铝厂 | Primary mineral pulp preparation process in Baeyer's alumina producing process |
| CN1273942A (en) * | 2000-03-09 | 2000-11-22 | 中南工业大学 | Process for desiliconizing monohydrated diasporite type bauxite |
| CN1403201A (en) * | 2002-09-28 | 2003-03-19 | 云南三环化工有限公司 | Multistage closed wet phosphate rock grinding process |
| CN1164368C (en) * | 2001-09-11 | 2004-09-01 | 北京矿冶研究总院 | Bauxite dressing method |
| CN1530173A (en) * | 2003-03-10 | 2004-09-22 | 中国地质科学院郑州矿产综合利用研究 | Beneficiation method for medium-low grade bauxite |
-
2005
- 2005-09-23 CN CNB2005102005617A patent/CN100448545C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5897063A (en) * | 1995-04-04 | 1999-04-27 | Krupp Polysius Ag | Method of comminuting ore material |
| CN1049875C (en) * | 1996-11-15 | 2000-03-01 | 山西铝厂 | Primary mineral pulp preparation process in Baeyer's alumina producing process |
| CN1273942A (en) * | 2000-03-09 | 2000-11-22 | 中南工业大学 | Process for desiliconizing monohydrated diasporite type bauxite |
| CN1164368C (en) * | 2001-09-11 | 2004-09-01 | 北京矿冶研究总院 | Bauxite dressing method |
| CN1403201A (en) * | 2002-09-28 | 2003-03-19 | 云南三环化工有限公司 | Multistage closed wet phosphate rock grinding process |
| CN1530173A (en) * | 2003-03-10 | 2004-09-22 | 中国地质科学院郑州矿产综合利用研究 | Beneficiation method for medium-low grade bauxite |
Non-Patent Citations (4)
| Title |
|---|
| 利用国外优质铝土矿生产氧化铝的节能途径. 张玉明.有色冶金节能，第6期. 2000 |
| 利用国外优质铝土矿生产氧化铝的节能途径. 张玉明.有色冶金节能，第6期. 2000 * |
| 铝土矿在球磨机中的选择性磨矿特性研究. 魏新超等.中国矿业，第2期. 2002 |
| 铝土矿在球磨机中的选择性磨矿特性研究. 魏新超等.中国矿业，第2期. 2002 * |
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| CN1739857A (en) | 2006-03-01 |
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Owner name: GUIYANG ALUMINUM AND MAGNESIUM DESIGN INSTITUTE CO Free format text: FORMER NAME: GUIYANG ALUMINIUM AND MAGNESIUM DESIGN INST. |
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Address after: 550081 Guiyang Province, Jinyang New District, Zhu Zhu Road, No. 2 Patentee after: Guiyang Aluminum & Magnesium Design Institute Co., Ltd. Address before: 550004 No. 208, Beijing Road, Guiyang, Guizhou Patentee before: Guiyang Aluminium and Magnesium Design Inst. |
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