CN102502677A - Aedelforsite industrializing production method - Google Patents
Aedelforsite industrializing production method Download PDFInfo
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- CN102502677A CN102502677A CN201110316168XA CN201110316168A CN102502677A CN 102502677 A CN102502677 A CN 102502677A CN 201110316168X A CN201110316168X A CN 201110316168XA CN 201110316168 A CN201110316168 A CN 201110316168A CN 102502677 A CN102502677 A CN 102502677A
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- wollastonite
- aedelforsite
- silica
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Abstract
The invention relates to an aedelforsite industrializing production method. The aedelforiste industrializing production method is characterized by comprising the following steps: proportioning lime stone and silica according to the weight ratio being 1.8-2.0:1-1.3, mixing the limestone and the silica sufficiently and uniformly, then adding the obtained material from the tail of a rotary kiln, moving the obtained material to the head of the rotary kiln at constant speed, controlling the heating time of the material in the kiln to be 1-2h, controlling the highest temperature in the rotary kiln to be 1300 DEG C-1600 DEG C, and when the material moves to the head of the kiln, taking the material out of the rotary kiln to obtain aedelforsite. According to the method, the natural aedelforsite forming process can be simulated and reproduced artificially, so that the purpose of continuously producting good aedelforsite in a large scale can be achieved. A rotary thermotechnical furnace is selected for production, is stable in the whole operation process, and also has the advantages of high production capability, strong adaptability and the like, wherein the obtained aedelforsite is stable in quality, and various materials are strong in adaptability.
Description
Technical field
The present invention relates to a kind of industrialized preparing process of wollastonite.
Background technology
Wollastonite is a kind of non-metallic mineral products, a kind of metasilicate mineral of calcium.Nature is common is white to pearl (minority is colors such as flesh pink and Huang, green, palm fibre).Crystal often is needle-like, radial, fibrous, plate---and plate-like dense set is fit.Vitreous luster, hardness 4.5-5, proportion 2.87-3.09,1540 ℃ of fusing points, chemical formula are CaSiO
3, theoretical chemistry composition CaO=48.3%, SiO
2=51.7%, because calcium wherein is often by displacements such as iron, manganese, magnesium, titanium, strontiums, so the wollastonite of nature output all can have mentioned component.The unique physicochemical property of wollastonite makes it in the national economy numerous areas, like Iron And Steel Industry, rubber industry, plastics industry, paint industry, coatings industry, ceramic industry, paper industry, welding electrode and national defense industry or the like extensive, important purposes arranged all.Substitute starting material such as carbonatite, clay, kaolin with wollastonite and make weighting agent and strengthening agent, the quality of the various types of product that each relevant industries produces is increased substantially, and simplify the technological process of production, practice thrift aspects such as cost remarkable effect is all arranged.Practice shows that wollastonite is a kind of nonmetallic minerals of preciousness, a kind of indispensable starting material, with Human's production, the life inseparable, closely bound up.In the development of the national economy, bring into play very important effect, having crucial social benefit and economic worth.
Along with developing by leaps and bounds of science and technology and national economy, each field every profession and trade is more deep and broad to the application meeting of wollastonite, and is more higher to the requirement meeting of wollastonite quality and quantity, yet natural wollastonite has but satisfied not the demand of this development far away.
Summary of the invention
The industrialized preparing process that the purpose of this invention is to provide a kind of wollastonite can obtain wollastonite mineral products resource of high quality and at a reasonable price through the industrial production of mass-producing.
A kind of industrialized preparing process of wollastonite, its special feature are that comprise the steps: by raw material limestone: the weight ratio of silica=1.8-2.0: 1.1-1.3 is carried out proportioning; Thorough mixing is even again; Then the material that obtains is added by the rotary kiln tail, and make it at the uniform velocity mobile, material was controlled at 1-2 hour the heat-up time in kiln to kiln hood; Top temperature is controlled at 1300-1600 ℃ in the rotary kiln, and kiln discharge gets wollastonite when moving to kiln hood.
CaCO in the Wingdale by weight wherein
3Content>=90%, SiO in the silica
2Content>=92%.
Wherein Wingdale and silica are natural matters.
Wherein the mixing of raw material limestone and silica is preceding is the powder of 40-75 micron by grinding.
The inventive method is the forming process of simulation reconstruction occurring in nature wollastonite artificially, reaches the order ground that the high quality silicon lime stone is produced in the mass-producing serialization.Select for use revolution thermal kiln furnace equipment to produce, the entire operation process stabilization, the wollastonite quality that obtains is stable, and various material flexibility are big, also possess advantages such as the big and flexibility of throughput is strong.
Embodiment
The wollastonite unique physical and chemical properties is following:
1, have needle-like, radial, fibrous crystals form, the length-to-diameter of its fiber is generally (7-8): 1-(13-15): 1, if ratio can reach 20: 1 after the surface treatment.
2, fluxing performance: it can be promptly molten mutually with silicon oxide, aluminum oxide etc. at lesser temps (1060 ℃-1149 ℃), thereby play the effect that reduces the mixture melt temperature, becomes a kind of good fusing assistant.
3, pure wollastonite is white in color or brilliant white; Purity is 99%, and its reflectivity can reach (92-96) % during granularity＜325 orders, and whiteness can reach (91-93) %; Can reach 98% after brightening processing, these characteristics make it in the production of advanced ceramic and high-quality white paint and shinny coating, important value arranged.
4, the coefficient of expansion is lower, and the coefficient of expansion changes also less, and is uniform linear expansion.
5, has high dielectricity, high thermotolerance, low oil absorbency and water-intake rate.
6, fabulous chemicalstability, solubleness is 0.0095g/100ml in 25 ℃ neutral water, acidproof generally speaking, alkaline-resisting, chemical resistance.Only in concentrated hydrochloric acid, be decomposed to form floss.Calcium in wollastonite is by elements such as iron, manganese, titanium, magnesium in addition, and the part displacement then exerts an influence to above-mentioned physicochemical property when forming Solid solution.
The one-tenth ore deposit mechanism of wollastonite is following:
Wollastonite is a kind of typical metamorphic mineral.Originate on the contact zones of carbonatite and acid magmatic rock; That is to say contact site at lime rock mass and silicic acid rock mass; Because temperature, pressure and the effect of chemical activity fluidic; Two kinds of rocks change and the stable mineral in new physics, chemical environment that form in structure, structure or chemical ingredients, also we can say because the intrusion of acid magmatic rock, produce complicated physics such as melting mixing, infiltration, explanation in the contact site of lime rock mass, chemical transformation forms.
See that from the angle of chemistry elevated temperature reaches 500 ℃ when having gone up under the normal pressure, Wingdale (CaCO
3) decompose, emit CO
2↑, nascent state oxidation calcium (CaO) and silicon oxide (SiO
2) begin to produce reaction generation wollastonite (CaSiO in solid phase
3).Experiment shows: when temperature rose to 900 ℃-1200 ℃, carbonate decomposition reached top speed, under this state, needed only CaO, SiO
2Proportioning is suitable, even, can both participate in reaction, forms wollastonite (CaSiO
3).Owing to be solid state reaction; So exist reaction, go forward one by one to particle center (contact zones far-end) gradually, when particle (contact zones) surface reaction is accomplished by the beginning of particle (contact zones) surface; And particle center (contact zones far-end) reaction has just just begun or has not also begun the rule of reacting; So, reaction is carried out thoroughly, the process that a time-delay will be arranged or wait for.When temperature rose to 1200 ℃-1300 ℃, wollastonite began partial melting, liquid phase occurs, and liquid phase continues to increase in the time of 1300 ℃-1450 ℃, and reaction is tending towards accomplishing.1450 ℃-1300 ℃, cooling gradually, mineral are stablized.
Embodiment 1
Natural limestone and silica is broken, grinding become 50 microns powder (do not pulverize or be ground into the larger particles powder also can, thereby but can influence material heat up increase energy consumption and time), CaCO in the Wingdale by weight wherein
3Content is 90%, SiO in the silica
2Content is 92%; By Wingdale: the weight ratio of silica=1.9: 1.2 is carried out proportioning, and thorough mixing is even again, then the material that obtains is added by the rotary kiln tail; And make it at the uniform velocity mobile to kiln hood; Material was controlled at 1 hour the heat-up time in kiln, and top temperature is controlled at 1600 ℃ in the rotary kiln, and kiln discharge gets wollastonite when moving to kiln hood.
Embodiment 2
Natural limestone and silica is broken, and grinding becomes 40 microns powder, wherein CaCO in the Wingdale by weight
3Content 98%, SiO in the silica
2Content 98%; By Wingdale: the weight ratio of silica=2.0: 1.1 is carried out proportioning, and thorough mixing is even again, then the material that obtains is added by the rotary kiln tail; And make it at the uniform velocity mobile to kiln hood; Material was controlled at 1.5 hours the heat-up time in kiln, and top temperature is controlled at 1450 ℃ in the rotary kiln, and kiln discharge gets wollastonite when moving to kiln hood.
Embodiment 3
Natural limestone and silica is broken, and grinding becomes 75 microns powder, wherein CaCO in the Wingdale by weight
3Content 96%, SiO in the silica
2Content 96%; By Wingdale: the weight ratio of silica=1.8: 1.3 is carried out proportioning, and thorough mixing is even again, then the material that obtains is added by the rotary kiln tail; And make it at the uniform velocity mobile to kiln hood; Material was controlled at 2 hours the heat-up time in kiln, and top temperature is controlled at 1300 ℃ in the rotary kiln, and kiln discharge gets wollastonite when moving to kiln hood.
For the wollastonite mineral products, country is unified standard not, and each mine every profession and trade also standard differs, and the wollastonite ore quality standard that China sells to the world market is following:
Export trade ore quality standard
Through evidence, adopt the wollastonite of the inventive method embodiment 1,3 preparations all can reach the first grade standard, and the wollastonite of embodiment 2 preparations can reach the select quality standard.
Claims (4)
1. the industrialized preparing process of a wollastonite is characterized in that, comprise the steps: by raw material limestone: the weight ratio of silica=1.8-2.0: 1.1-1.3 is carried out proportioning; Thorough mixing is even again; Then the material that obtains is added by the rotary kiln tail, and make it at the uniform velocity mobile, material was controlled at 1-2 hour the heat-up time in kiln to kiln hood; Top temperature is controlled at 1300-1600 ℃ in the rotary kiln, and kiln discharge gets wollastonite when moving to kiln hood.
2. the industrialized preparing process of wollastonite as claimed in claim 1 is characterized in that: CaCO in the Wingdale by weight wherein
3Content>=90%, SiO in the silica
2Content>=92%.
3. the industrialized preparing process of wollastonite as claimed in claim 1, it is characterized in that: wherein Wingdale and silica are natural matters.
4. the industrialized preparing process of wollastonite as claimed in claim 1 is characterized in that: is the powder of 40-75 micron by grinding before wherein raw material limestone and silica mix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110316168XA CN102502677A (en) | 2011-10-18 | 2011-10-18 | Aedelforsite industrializing production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110316168XA CN102502677A (en) | 2011-10-18 | 2011-10-18 | Aedelforsite industrializing production method |
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| Publication Number | Publication Date |
|---|---|
| CN102502677A true CN102502677A (en) | 2012-06-20 |
Family
ID=46214828
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110316168XA Pending CN102502677A (en) | 2011-10-18 | 2011-10-18 | Aedelforsite industrializing production method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445233A (en) * | 2014-12-17 | 2015-03-25 | 邵燕 | Industrialized production method of wollastonite |
| CN108207111A (en) * | 2015-03-20 | 2018-06-26 | 索里迪亚科技公司 | Micro-structural carbonates silicic acid calcium clinker and its manufacturing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3552915A (en) * | 1967-04-20 | 1971-01-05 | Corning Glass Works | Sintered wollastonite |
| CN1099007A (en) * | 1994-05-06 | 1995-02-22 | 郭建华 | Recipe and technique for artificial tabular spar |
| CN1123256A (en) * | 1995-08-25 | 1996-05-29 | 郭健华 | Artificial wollastonite covering slag base material and its production process |
-
2011
- 2011-10-18 CN CN201110316168XA patent/CN102502677A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3552915A (en) * | 1967-04-20 | 1971-01-05 | Corning Glass Works | Sintered wollastonite |
| CN1099007A (en) * | 1994-05-06 | 1995-02-22 | 郭建华 | Recipe and technique for artificial tabular spar |
| CN1123256A (en) * | 1995-08-25 | 1996-05-29 | 郭健华 | Artificial wollastonite covering slag base material and its production process |
Non-Patent Citations (1)
| Title |
|---|
| TIM POWER: "Wollastonite performance filler potential", 《INDUSTRIAL MINERALS》, 31 January 1986 (1986-01-31), pages 19 - 33 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445233A (en) * | 2014-12-17 | 2015-03-25 | 邵燕 | Industrialized production method of wollastonite |
| CN108207111A (en) * | 2015-03-20 | 2018-06-26 | 索里迪亚科技公司 | Micro-structural carbonates silicic acid calcium clinker and its manufacturing method |
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Application publication date: 20120620 |