CN101912811B - Method for preparing nepheline syenite powder - Google Patents

Method for preparing nepheline syenite powder Download PDF

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Publication number
CN101912811B
CN101912811B CN 201010229489 CN201010229489A CN101912811B CN 101912811 B CN101912811 B CN 101912811B CN 201010229489 CN201010229489 CN 201010229489 CN 201010229489 A CN201010229489 A CN 201010229489A CN 101912811 B CN101912811 B CN 101912811B
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CN
China
Prior art keywords
flotation
nepheline syenite
preparing
syenite powder
powder
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CN 201010229489
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Chinese (zh)
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CN101912811A (en
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陆文艺
赵廷刚
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英德市奥胜新材料有限责任公司
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Abstract

The invention relates to a method for preparing nepheline syenite powder. The method comprises the following steps of: elutriating and washing raw materials; smashing ores; performing graded screening; performing ball milling and fine crushing; removing impurities and filtering; and dewatering and drying, wherein the impurity-removing and filtering step comprises a flotation procedure for removing mica in the nepheline syenite. A two-stage closed-loop wet grinding process, a flotation process and a magnetic separation and impurity removing process are adopted by the method, so that impurities such as the mica and the like can be removed basically and a contradiction between purification and super small product particle size is solved. Material smashing and grinding are performed by using a closed-loop system, so that power consumption is lowered to the maximum extent and the reasonable distribution of the product particle size is ensured simultaneously. A new high-purity nepheline syenite material which hardly contains any mica impurity and is prepared by the method has TiO2 content of lower than 0.01 percent and Fe2O3 content of lower than 0.10 percent and meets the requirements of functional ceramics and structural ceramics.

Description

A kind of method for preparing nepheline syenite powder

Technical field

The present invention relates to a kind of method for preparing nepheline syenite powder, especially relate to a kind of process for preparing the ultra tiny granularity powder of nepheline syenite.

Background technology

Nepheline syenite is good ceramic raw material, and the nepheline syenite of in the past domestic processing can not be used for making structural ceramics and function ceramics because the technical indicators such as its purity, granularity and grain shape do not reach requirement, only is used for conventional ceramic.Particularly nepheline syenite generally has iron, Ti content is higher, contains the shortcomings such as mica impurity.Traditional purifying technique only is to adopt magnetic separator to remove irony and other magnetisable material.And mica is to be difficult to magnetized impurity, and magnetic separator is difficult to remove the mica in the nepheline syenite.Just contain ferro element in this body structure of mica, cause the Fe in the nepheline syenite product 2O 3Content can only be applied in traditional conventional ceramic (domestic ceramics and architectural pottery) industry generally greater than 0.15%.

In addition, present domestic preparation ultrafine powder, most of impacting type dry pulverization process machine or ring roll-type Raymond machine of adopting, grain shape mostly is greatly the angular irregular particle, and the irony of sneaking into is more.In structural ceramics and function ceramics, make the material of mineralizer, it preferably all is spheroidal that its grain shape requires, because the firing temperature of this class pottery is generally higher, require mineralizer (also having the flux effect) can be under higher temperature just to form glassy phase with on every side substance reaction.Be nepheline syenite equally, the angular irregular particle will glassy phase occur ahead of time than spheroidal particle, can prematurely with unsintered duct gambling plug, affect the densified of product.

Summary of the invention

In order to overcome the weak point of the prior art of above-mentioned indication, the invention provides a kind of method for preparing nepheline syenite powder, can be used for making structural ceramics and function ceramics with preparation, the technical indicators such as its purity, granularity and grain shape meet the requirements of the ultra tiny granularity powder of nepheline syenite.

The present invention is achieved by the following technical solutions: a kind of method for preparing nepheline syenite powder, and the step of described method comprises:

(a) eluriate raw material, prepare burden according to product requirement;

(b) adopt the crusher in crushing ore, and by vibratory sieve to stock grading;

(c) material is after the dry type deironing, be delivered to the one-level ball mill and implement wet grinding, and by cyclone to stock grading;

(d) material enters flotation device and implements the flotation operation, to remove the mica in the nepheline syenite; Remove irony and other magnetisable material by magnetic separator;

(e) mass transport is implemented wet grinding again to the secondary ball mill; And by grader material is carried out classification;

(f) dehydrate, form powder.

Described flotation operation adopts reverse flotation method, and the emersion thing is impurity, and sediment is product.Described flotation operation adopts primary amine salt, sodium metasilicate, three kinds of medicaments of sodium carbonate, and the weight ratio of three kinds of medicaments is followed successively by (2.5-3.5): 1: 1, the consumption summation of three kinds of medicaments was the 0.3%-0.8% of flotation weight of material.The floatation concentration of described flotation material is controlled in the 10%-25%.This method has adopted secondary wet grinding technique, and material carries out flotation, magnetic separation behind the one-level ball milling, enters thereafter secondary ball milling operation.Behind the one-level ball milling, the specific gravity control of the material of granularity in the 10-100 mu m range is controlled the flotation granularity more than 90% with this.The material crushing of described method and ball milling all adopt closed-circuit system, by classifying equipoment certified products are selected and are entered subsequent processing, and defective work returns an operation.Described method adopts the ball mill of corundum ball, corundum lining that mineral are ground.Described material is implemented the homogenizing mixing before entering ball mill grinding.

The present invention is according to the requirement of function ceramics to the high-performance raw material, ad hoc one flotation operation, adopted secondary wet grinding technique to add flotation, magnetic separation impurity removal process, flotation can be removed the impurity such as mica substantially, also remove simultaneously part iron, alleviate the pressure of magnetic separation, solved the ultra-fine contradiction of purification and product granularity.Adopt the ball mill ore grinding, to be ground to the master, particularly adopt corundum ball, corundum lining, guarantee that not only grinding process do not sneak into irony, and because corundum proportion is relatively little, cause the deformation process relative velocity of material slow, change even, smooth surface, output powder shape improves the compactness of product take the approximate circle sphere as main.In addition, closed-circuit system is all adopted in broken, grinding, has guaranteed reasonable distribution when having reduced power consumption to greatest extent, satisfies the requirement of function ceramics structural ceramics.

The high-purity nepheline syenite new material that the mica impurity content that utilizes the present invention to prepare is extremely low, wherein TiO 2Content≤0.01%, Fe 2O 3Content≤0.10%, through after the pilot scale at home first Application in structural ceramics and function ceramics, be that present domestic unique energy is used for the high-purity nepheline syenite powder new material of function ceramics, admitted by structural ceramics and function ceramics industry and adopt.

Description of drawings

Accompanying drawing 1 is the process flow diagram of the embodiment of the invention.

The specific embodiment

For the ease of those skilled in the art's understanding, the invention will be further described below in conjunction with accompanying drawing.

A kind of method for preparing nepheline syenite powder, the flow process of described method comprises eluriates that raw material, breaking ores, sizing screening, ball milling are in small, broken bits, removal of impurities is filtered, dehydrated, described removal of impurities is filtered and is comprised the flotation operation in this program, to remove the mica in the nepheline syenite.Described flotation operation adopts primary amine salt, sodium metasilicate, three kinds of medicaments of sodium carbonate, and the weight ratio of described three kinds of medicaments is followed successively by (2.5-3.5): 1: 1, the consumption summation of three kinds of medicaments was the 0.3%-0.8% of flotation weight of material.Consumption according to the actual conditions floating agent can appropriately adjust.Guarantee the magnetic separation effect in the time of for the assurance flotation effect, the floatation concentration of described flotation material is controlled in the 10%-25%.Described flotation operation adopts reverse flotation method, and the emersion thing is impurity, and sediment is product.

As shown in Figure 1, the concrete steps of the technological process of present embodiment are as follows:

Step 01: select the washup thing, prepare burden according to product requirement;

Step 02: adopt the jaw crusher break mined material;

Step 03: adopt the impact breaker break mined material;

Step 04: to stock grading, granularity is returned impact breaker continuation fragmentation greater than the material of 3mm by vibratory sieve, and granularity enters step 05 less than the material of 3mm;

Step 05: adopt dry-type deferrization machine to Material deironing;

Step 06: material enters homogenization silo through conveyer belt, carries out homogenizing and mixes;

Step 07: material enters the one-level ball mill and implements wet grinding after metering;

Step 08: to stock grading, granularity is returned one-level ball mill continuation grinding greater than the material of 100 μ m by cyclone, and granularity enters step 09 less than the material of 100 μ m;

Step 09: material enters flotation device, and mica and other impurity are removed in flotation;

Step 10: remove irony and other magnetisable material by high gradient magnetic separator;

Step 11: material enters the agitator homogenizing, fully mixes;

Step 12: material enters the secondary ball mill, again implements wet grinding;

Step 13: by ultra-fine grader material is carried out classification, granularity is returned the secondary ball mill greater than the material of 5 μ m, and granularity enters step 14 less than the material of 5 μ m;

Step 14: adopt the concentrated slurry of concentrator, implement Separation of Solid and Liquid;

Step 15: by the filter press dehydration, further realize Separation of Solid and Liquid;

Step 16: form powder by the drying machine drying material;

Step 17: be stored in the storage facilities after the gauging of products packing.

This method adopts secondary wet grinding technique, and material carries out flotation, magnetic separation behind the one-level ball milling, enter thereafter secondary ball milling operation.Behind the one-level ball milling, the specific gravity control of the material of granularity in the 10-100 mu m range is controlled the flotation granularity more than 90% with this.The suitable granularity of flotation is 10-100 μ m.Granularity is large, and material wraps up mutually, separates not exclusively, is difficult to flotation, magnetic separation; The undersized of material produces argillization, is unfavorable for that also flotation and magnetic separation separate.

Adopt the ball mill of corundum ball, corundum lining in described ball milling this program in small, broken bits, to be ground to the master, guarantee that not only grinding process do not sneak into irony, and because corundum proportion is relatively little, make the deformation process relative velocity of material slow, change even, smooth surface, output powder shape improves the compactness of product take the approximate circle sphere as main.

Breaking ores of the present invention, ball milling fine crushing process all adopt closed-circuit system, by classifying equipoment certified products are selected and are entered subsequent processing, and defective work returns an operation, guarantee reasonable distribution when reducing power consumption to greatest extent.The twice homogenization process that carries out at homogenization silo, agitator respectively is set in the technological process, can guarantees the uniformity of product and the stability of quality.

Major technique and performance indications according to the nepheline syenite powder of made of the present invention are as follows:

1. iron, Ti content: TiO 2:≤0.01%; Fe 2O 3:≤0.10%.

2. granularity and size distribution :≤0.5 μ m about 10%; 0.5 μ m-5 μ m 〉=90%; About 80%, the 3 μ m-5 μ m about 10% of 1 μ m-3 μ m.

3. grain shape: 98% is the approximate circle spheric granules.

The content of mentioning in above-described embodiment is not to be limitation of the invention, and without departing from the inventive concept of the premise, any apparent replacement is all within protection scope of the present invention.

Claims (6)

1. method for preparing nepheline syenite powder, the step of described method comprises:
(a) eluriate raw material, prepare burden according to product requirement;
(b) adopt the crusher in crushing ore, and by vibratory sieve to stock grading;
(c) material is after the dry type deironing, be delivered to the one-level ball mill and implement wet grinding, and by cyclone to stock grading;
(d) material enters flotation device and implements the flotation operation, to remove the mica in the nepheline syenite, described flotation operation adopts primary amine salt, sodium metasilicate, three kinds of medicaments of sodium carbonate, the weight ratio of three kinds of medicaments is followed successively by (2.5-3.5): 1: 1, the consumption summation of three kinds of medicaments was the 0.3%-0.8% of flotation weight of material; Remove irony and other magnetisable material by magnetic separator;
(e) mass transport is implemented wet grinding again to the secondary ball mill; And by grader material is carried out classification;
(f) dehydrate, form powder.
2. the method for preparing nepheline syenite powder according to claim 1, it is characterized in that: the floatation concentration of described flotation material is controlled in the 10%-25%.
3. the method for preparing nepheline syenite powder according to claim 2 is characterized in that: described flotation operation adopts reverse flotation method, and the emersion thing is impurity, and sediment enters subsequent processing.
4. the method for preparing nepheline syenite powder according to claim 3, it is characterized in that: material is behind the one-level ball milling, and the specific gravity control of the material of granularity in the 10-100 mu m range is controlled the flotation granularity more than 90% with this.
5. according to claim 1 to 4 each described methods that prepare nepheline syenite powder, it is characterized in that: described method adopts the ball mill of corundum ball, corundum lining that mineral are ground.
6. the method for preparing nepheline syenite powder according to claim 5 is characterized in that: described material enters to be implemented homogenizing before the ball mill grinding and mixes.
CN 201010229489 2010-07-15 2010-07-15 Method for preparing nepheline syenite powder CN101912811B (en)

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Families Citing this family (10)

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CN102527495B (en) * 2010-12-22 2014-04-16 佛冈县山深陶瓷原料有限公司 Mineral separation process for non-metal ore
CN102649095A (en) * 2011-02-24 2012-08-29 苏州纳方工程材料有限公司 Grinding method of titanium dioxide
CN103182344B (en) * 2011-12-30 2014-07-16 北京有色金属研究总院 Ore dressing combination process for processing high-slime lead-zinc oxide and sulfide mixed ore
CN102527475B (en) * 2012-01-16 2014-04-09 黄建平 Production process and production line of ceramic slurry
CN103274763B (en) * 2013-05-08 2014-06-11 英德市奥胜新材料有限责任公司 Nepheline syenite powder and production method thereof
CN103274594A (en) * 2013-06-05 2013-09-04 英德市奥胜新材料有限责任公司 Glaz-use potassium feldspar powder and preparation method thereof
CN105327773B (en) * 2015-11-26 2018-01-30 四川南江新兴矿业有限公司 The method for reclaiming nepheline ore deposit in nepheline ore deposit mine tailing
CN105381865B (en) * 2015-11-26 2017-12-05 四川南江新兴矿业有限公司 The method of nepheline ore strong magnetic blanking calcium oxide
CN107837933B (en) * 2017-10-19 2020-02-07 四川南江新兴矿业有限公司 Nonmetal nepheline wet separation process
CN108866348A (en) * 2018-07-27 2018-11-23 阳谷祥光铜业有限公司 A kind of space blowing material preparation technology and stock preparation system of matte

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