CN103663507A - Method for preparing pure natural magnesium hydroxide flame retardant - Google Patents
Method for preparing pure natural magnesium hydroxide flame retardant Download PDFInfo
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- CN103663507A CN103663507A CN201310418134.0A CN201310418134A CN103663507A CN 103663507 A CN103663507 A CN 103663507A CN 201310418134 A CN201310418134 A CN 201310418134A CN 103663507 A CN103663507 A CN 103663507A
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- magnesium hydroxide
- flame retardant
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Abstract
The invention discloses a method for preparing a pure natural magnesium hydroxide flame retardant and relates to the technical field of production of powder materials. The method comprises the following steps: sequentially roughing and selecting high-quality brucite ore with the effective magnesium hydroxide content of 91-96 percent, and crushing the brucite ore into broken ore through a crusher; roughly grinding the broken ore obtained in the step 1 through a Raymond mill, and grading into magnesium hydroxide flame retardant raw powder of different granularities; finely grinding the magnesium hydroxide flame retardant raw powder obtained in the step 2 through an ultrafine grinder, grading into magnesium hydroxide flame retardant ultrafine powder with the mean grain size of 1-10mu m. According to the method, the magnesium hydroxide flame retardant is prepared by adopting a physical method, and the method is simple in process, readily available in raw materials, environment-friendly and low in production cost.
Description
Technical field
The present invention relates to relate to powder body material production technical field, relate in particular to a kind of preparation method of flame retardant of magnesium hydroxide.
Background technology
Fire retardant according to chemical composition can be divided into organic fire-retardant and the large class of inorganic combustion inhibitor two, because organic fire-retardant exists the shortcomings such as degradation production toxicity is large, smog is large, just progressively by inorganic combustion inhibitor, substituted, inorganic combustion inhibitor magnesium hydroxide especially wherein not only can play fire retardation, and can play filling effect, have thermally-stabilised good, efficient, press down cigarette, resistance drip, fill safety, to features such as environment are substantially pollution-free, in fire retardant material, be widely used.
The existing method of preparing magnesium hydroxide is a lot, mainly contain two kinds of modes of Physical and chemical method, Physical makes by natural mineral brucite is carried out to physics deep processing, chemical method is mainly to utilize chemical synthesis, the raw materials such as the bittern that contains magnesium chloride by utilization, halogen ore deposit are reacting in water medium with bases, and chemical method mostly production process is complicated, and starting material are difficult for obtaining, easily contaminate environment, considers it is unacceptable from the angle of industrial application cost.
Summary of the invention
The preparation method who the object of this invention is to provide a kind of pure natural flame retardant of magnesium hydroxide, it adopts physical method to be prepared flame retardant of magnesium hydroxide, production technique is simple, starting material are easily obtained, environmental friendliness, technical feasibility, economical rationality, can make full use of the brucite mineral products resource of China's abundant high-quality, improve the low problem of utilization ratio of China's brucite resource.
In order to solve the existing problem of background technology, by the following technical solutions, it comprises the following steps the inventive method:
Step 1: first through roughly selecting again selected magnesium hydroxide effective content at the high-quality brucite ore of 91%-96%, then become broken ore through crusher in crushing;
Step 2: then gained broken ore in step 1 is classified into the former powder of varigrained flame retardant of magnesium hydroxide through Raymond mill corase grind;
Step 3: the former powder of gained flame retardant of magnesium hydroxide in step 2 is carried out to fine grinding through ultrafine crusher and be classified into again the flame retardant of magnesium hydroxide ultrafine powder that median size is 1 μ m-10 μ m.
Compared with prior art, beneficial effect of the present invention is embodied in: the inventive method is to adopt physical method to prepare flame retardant of magnesium hydroxide, its technique is simple, starting material are easily obtained, environmental friendliness, production cost is low, has utilized fully the brucite mineral products resource of China's abundant high-quality, has improved the low problem of utilization ratio of China's brucite resource.
Accompanying drawing explanation:
The schematic flow sheet of Fig. 1 the inventive method.
Embodiment:
Fig. 1 is the schema of the inventive method, and concrete steps comprise:
Step 1: first through roughly selecting selected magnesium hydroxide effective content at the high-quality brucite ore of 91%-96%, then process jaw crusher is broken into the broken ore of 1cm-5cm again;
Step 2: then gained broken ore in step 1 is classified into the former powder of varigrained flame retardant of magnesium hydroxide through Raymond mill corase grind;
Step 3: the former powder of gained flame retardant of magnesium hydroxide in step 2 is carried out to fine grinding through ultrafine crusher and be classified into again the flame retardant of magnesium hydroxide ultrafine powder that median size is 1 μ m-10 μ m.
Embodiment 1: the present embodiment carries out as follows:
1, first through roughly selecting, choose again magnesium hydroxide effective content at 91% high-quality brucite ore, then through jaw crusher, be broken into the broken ore of 1cm;
2, gained broken ore in step 1 is roughly ground and is then classified into the former powder of varigrained flame retardant of magnesium hydroxide through Raymond mill;
3, the former powder of gained flame retardant of magnesium hydroxide grading system after ultrafine crusher fine grinding in step 2 being obtained to median size is 1 μ m flame retardant of magnesium hydroxide ultrafine powder.
Embodiment 2: the present embodiment carries out as follows:
1, first through roughly selecting, choose again magnesium hydroxide effective content at 96% high-quality brucite ore, then through jaw crusher, be broken into the broken ore of 5cm;
2, gained broken ore in step 1 is roughly ground and is then classified into the former powder of varigrained flame retardant of magnesium hydroxide through Raymond mill;
3, by the former powder of gained flame retardant of magnesium hydroxide in step 2, through ultrafine crusher, fine grinding is classified into median size again in the flame retardant of magnesium hydroxide ultrafine powder of 10 μ m.
Embodiment 3: the present embodiment carries out as follows:
1, first through roughly selecting, choose again magnesium hydroxide effective content at 93.3% high-quality brucite ore, then through jaw crusher, be broken into the broken ore of 3cm;
2, gained broken ore in step 1 is roughly ground and is then classified into the former powder of varigrained flame retardant of magnesium hydroxide through Raymond mill;
3, by the former powder of gained flame retardant of magnesium hydroxide in step 2, through ultrafine crusher, fine grinding is classified into median size again in the flame retardant of magnesium hydroxide ultrafine powder of 5 μ m.
Embodiment 4: the present embodiment carries out as follows:
1, first through roughly selecting, choose again magnesium hydroxide effective content at 94.7% high-quality brucite ore, then through jaw crusher, be broken into the broken ore of 3cm;
2, gained broken ore in step 1 is roughly ground and is then classified into the former powder of varigrained flame retardant of magnesium hydroxide through Raymond mill;
3, by the former powder of gained flame retardant of magnesium hydroxide in step 2, through ultrafine crusher, fine grinding is classified into median size again in the flame retardant of magnesium hydroxide ultrafine powder of 10 μ m.
Claims (1)
1. a preparation method for pure natural flame retardant of magnesium hydroxide, it comprises the following steps:
Step 1: first through roughly selecting again selected magnesium hydroxide effective content at the high-quality brucite ore of 91%-96%, then become broken ore through crusher in crushing;
Step 2: then gained broken ore in step 1 is classified into the former powder of varigrained flame retardant of magnesium hydroxide through Raymond mill corase grind;
Step 3: the former powder of gained flame retardant of magnesium hydroxide in step 2 is carried out to fine grinding through ultrafine crusher and be classified into again the flame retardant of magnesium hydroxide ultrafine powder that median size is 1 μ m-10 μ m.
2, preparation method according to claim 1, is characterized in that, in described step 1, is with jaw crusher, brucite ore to be broken into the broken ore of 1cm-5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310418134.0A CN103663507A (en) | 2013-09-16 | 2013-09-16 | Method for preparing pure natural magnesium hydroxide flame retardant |
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| CN201310418134.0A CN103663507A (en) | 2013-09-16 | 2013-09-16 | Method for preparing pure natural magnesium hydroxide flame retardant |
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| CN103663507A true CN103663507A (en) | 2014-03-26 |
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| CN201310418134.0A Pending CN103663507A (en) | 2013-09-16 | 2013-09-16 | Method for preparing pure natural magnesium hydroxide flame retardant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106349764A (en) * | 2016-08-31 | 2017-01-25 | 合肥中科阻燃新材料有限公司 | Method for efficiently preparing modified magnesium hydroxide fire retardant through low-grade brucite |
| CN106366700A (en) * | 2016-08-31 | 2017-02-01 | 合肥中科阻燃新材料有限公司 | Wet preparation method of magnesium hydrate flame retardant |
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| US6552112B1 (en) * | 1997-07-23 | 2003-04-22 | Pirelli Cavi E Sistemi S.P.A. | Cable with self-extinguishing properties and flame-retardant composition |
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| US20110147682A1 (en) * | 2008-07-10 | 2011-06-23 | Imerys Minerals Limited | Magnesium hydroxide |
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- 2013-09-16 CN CN201310418134.0A patent/CN103663507A/en active Pending
Patent Citations (6)
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| US6552112B1 (en) * | 1997-07-23 | 2003-04-22 | Pirelli Cavi E Sistemi S.P.A. | Cable with self-extinguishing properties and flame-retardant composition |
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| US20110147682A1 (en) * | 2008-07-10 | 2011-06-23 | Imerys Minerals Limited | Magnesium hydroxide |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106349764A (en) * | 2016-08-31 | 2017-01-25 | 合肥中科阻燃新材料有限公司 | Method for efficiently preparing modified magnesium hydroxide fire retardant through low-grade brucite |
| CN106366700A (en) * | 2016-08-31 | 2017-02-01 | 合肥中科阻燃新材料有限公司 | Wet preparation method of magnesium hydrate flame retardant |
| CN106349764B (en) * | 2016-08-31 | 2018-05-18 | 合肥中科阻燃新材料有限公司 | A kind of low-grade shepardite high efficiency prepares modified magnesium hydroxide flame retardant agent method |
| CN106366700B (en) * | 2016-08-31 | 2019-03-01 | 合肥中科阻燃新材料有限公司 | A kind of flame retardant of magnesium hydroxide wet preparation method |
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Application publication date: 20140326 |