CN103570247B - A kind of centrifuging super glass wool and its preparation method - Google Patents

Abstract

The invention discloses a centrifuge superfine glass wool. The composition (mass percentage) of the glass wool is: 63.0-66.5% SiO ₂ , 1.4-3.0% Al ₂ O ₃ , 5.5-7.5% CaO, 1.5-3.0% %MgO, 0.4-1.3% K ₂ O, 14.2-16.0% Na ₂ O, 5.5-7.6% B ₂ O ₃ . Among them, the content _of Al ₂ O ₃ is 1.4-3.0%, which can reduce the crystallization tendency of the glass liquid, making the fiber flexible, without burrs and breakage _; The viscosity of the glass liquid is lowered at temperature, and the fibers are easy to be thinned. 90% of the fiber diameter of the glass wool in the present invention is normally distributed in 2-4 μm, and 92% of the fiber length is normally distributed in 2-3 cm. The invention also discloses a preparation method of the above-mentioned superfine glass wool. The raw materials whose components meet the requirements are selected, and the raw materials are put into a kiln to be melted into transparent glass liquid. The glass liquid is introduced into the centrifugal head, and the flow rate of each centrifugal head is 76±2kg/h to make ultra-fine glass wool. The ultra-fine glass wool of the invention has low thermal conductivity, uniform layering, and good sound-absorbing and heat-insulating properties. This material can be used to make sound-insulating and noise-reducing cotton felts in aircraft cabins, sound-insulating and heat-insulating felts for walls and roofs, insulation boards and other sound-absorbing and heat-insulating products.

Description

A kind of centrifugal ultrafine glass wool and preparation method thereof

technical field

The invention relates to the field of glass wool, in particular to the field of centrifugal superfine glass wool.

Background technique

Centrifugal glass wool is to melt recycled glass cullet and other raw materials into molten glass at high temperature. The glass fiber is thrown out of the high-speed rotating centrifugal disk once and then stretched by a high-temperature flame for a second time to become an inorganic material with a diameter of 1-8 μm. Cotton-like fibers. Because the glass wool fibers cross each other and have certain elasticity, many independent pores are formed inside the glass wool, and the independent pores greatly increase the way of heat and sound transmission, so the glass wool has the function of sound absorption and heat insulation. Glass wool is widely used in the fields of building sound insulation, wall insulation, petrochemical pipeline insulation and battery glass fiber absorbent partitions. However, the sound insulation and heat insulation of some special fields such as airplanes and large multi-functional concert halls have very high requirements on the performance of glass wool, such as requiring glass wool to have low enough thermal conductivity and bulk density, soft cotton fibers, no burrs and breaks, fiber diameter and The length dispersion is small, and the layering effect of glass wool is good. However, the performance of the ultrafine glass wool produced by the prior art generally cannot meet such requirements.

Chinese patent 101811824A (published on August 25, 2010) discloses a production method of ultra-fine glass wool. The composition of glass wool produced by this method is SiO ₂ 64.5-66%, Al ₂ O ₃ and Fe ₂ O ₃ The sum of B 2 O 3 is 2.6-2.9%, the sum of B ₂ O ₃ is 4.8-5%, the sum of CaO and MgO is 10.6-11%, and the sum of Na ₂ O and K ₂ O is 15.8-16%. This method can produce Ultrafine glass wool with a diameter of ₂ to 5 μm, but the disadvantage of this method is that due to the low content _of B2O3, the fiber is difficult to refine, and the requirements for the process conditions are very high. The cotton fiber is prone to burrs, easy to break, and insufficient It is soft, and the diameter and length of the ultrafine glass wool produced have large dispersion, which cannot present a normal distribution. This directly leads to the fact that the sound-absorbing and heat-insulating properties of the glass wool cannot meet the requirements of special fields.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an improved centrifugal ultra-fine glass wool formula, which is easy to make the cotton fiber thin, soft, burr-free and broken, and the fiber layer is uniform , and 90% of the fiber diameters are normally distributed within the range of 2-4 μm, and 85% of the fiber length is normally distributed within the range of 2-3 cm, so that the ultra-fine glass wool has excellent performance and can meet the requirements of sound absorption and heat insulation in special fields .

Another technical problem to be solved in the present invention is to provide a kind of preparation method of above-mentioned superfine glass wool, comprise the steps of following sequence:

(1) 230-270kg of recycled plate cullet, 250-290kg of quartz sand, 110-140kg of feldspar, 14-30kg of limestone, 50-80kg of dolomite, 95-110kg of soda ash and 120-140kg of borax pentahydrate are selected for every 1000kg of raw materials;

Among them, the main components of the selected recovered flat glass are as follows: 72%≤SiO ₂ ≤73%, 8%≤CaO≤9%, 4%≤MgO≤5%, 14%≤Na ₂ O+K ₂ O≤15 %;

The main components of the selected quartz sand are as follows: 97.5%≤SiO ₂ ≤99%, 0.8%≤CaO≤1.0%, 0.9%≤MgO≤1.0%, 0.9%≤Al ₂ O ₃ ≤1.0%;

The selected feldspar requires the following main components: 70.0%≤SiO ₂ ≤71.0%, 0.8%≤CaO≤1.0%, 0.9%≤MgO≤1.0%, 16.0%≤Al ₂ O ₃ ≤18.0%;

Among them, the selected limestone requires the main component content as follows: 55.0%≤CaO≤56.5%, 0.8%≤MgO≤1.0%;

The selected dolomite requires the following main components: 30.5%≤CaO≤32.0%, 20.0%≤MgO≤22.0%;

The main components of the selected soda ash are as follows: 55.0%≤Na ₂ O≤56.5%;

The selected borax pentahydrate requires the following main components: 21.0% ≤ Na ₂ O ≤ 22.5%, 48.0% ≤ B ₂ O ₃ ≤ 49.0%;

(2) After the raw materials are uniformly mixed, they are put into a kiln and melted into a uniform and transparent glass liquid;

(3) The glass liquid is introduced into the centrifuge head from the leakage plate, and the centrifuge superfine glass wool is produced with the flow rate of 76±2kg/h for each centrifuge head.

detailed description

Below in conjunction with specific examples, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand the various equivalent forms of the present invention Modifications are all within the scope of the claims appended hereto.

Example 1

(1) Every 1000kg of raw materials selects 242kg of recovered flat glass cullet, 276kg of quartz sand, 127kg of feldspar, 16kg of limestone, 59kg of dolomite, 106kg of soda ash, and 131kg of borax pentahydrate;

Among them, the main components of the selected recovered flat glass are as follows: 72%≤SiO ₂ ≤73%, 8%≤CaO≤9%, 4%≤MgO≤5%, 14%≤Na ₂ O+K ₂ O≤15 %;

The main components of the selected quartz sand are as follows: 97.5%≤SiO ₂ ≤99%, 0.8%≤CaO≤1.0%, 0.9%≤MgO≤1.0%, 0.9%≤Al ₂ O ₃ ≤1.0%.

The selected feldspar requires the following main components: 70.0%≤SiO ₂ ≤71.0%, 0.8%≤CaO≤1.0%, 0.9%≤MgO≤1.0%, 16.0%≤Al ₂ O ₃ ≤18.0%.

Among them, the selected limestone requires the main component content as follows: 55.0%≤CaO≤56.5%, 0.8%≤MgO≤1.0%.

The selected dolomite requires the following main components: 30.5%≤CaO≤32.0%, 20.0%≤MgO≤22.0%.

Among them, the selected soda ash requires the content of main components as follows: 55.0%≤Na ₂ O≤56.5%.

The selected borax pentahydrate requires the following main components: 21.0%≤Na ₂ O≤22.5%, 48.0%≤B ₂ O ₃ ≤49.0%.

(2) After the raw materials are evenly mixed, they are put into the kiln and melted into a uniform and transparent glass liquid.

(3) The glass liquid is introduced into the centrifuge head from the leakage plate, and the ultra-fine glass wool of the centrifugation method is produced at a low flow rate of 76±2kg/h for each centrifuge head.

Example 2

(1) Every 1000kg of raw materials selects 248kg of recycled flat glass cullet, 270kg of quartz sand, 120kg of feldspar, 15kg of limestone, 60kg of dolomite, 108 soda ash, and 133kg of borax pentahydrate;

Among them, the main components of the selected recovered flat glass are as follows: 72%≤SiO ₂ ≤73%, 8%≤CaO≤9%, 4%≤MgO≤5%, 14%≤Na ₂ O+K ₂ O≤15 %;

The main components of the selected quartz sand are as follows: 97.5%≤SiO ₂ ≤99%, 0.8%≤CaO≤1.0%, 0.9%≤MgO≤1.0%, 0.9%≤Al ₂ O ₃ ≤1.0%.

The selected feldspar requires the following main components: 70.0%≤SiO ₂ ≤71.0%, 0.8%≤CaO≤1.0%, 0.9%≤MgO≤1.0%, 16.0%≤Al ₂ O ₃ ≤18.0%.

Among them, the selected limestone requires the main component content as follows: 55.0%≤CaO≤56.5%, 0.8%≤MgO≤1.0%.

The selected dolomite requires the following main components: 30.5%≤CaO≤32.0%, 20.0%≤MgO≤22.0%.

Among them, the selected soda ash requires the content of main components as follows: 55.0%≤Na ₂ O≤56.5%.

The selected borax pentahydrate requires the following main components: 21.0%≤Na ₂ O≤22.5%, 48.0%≤B ₂ O ₃ ≤49.0%.

(2) After the raw materials are evenly mixed, they are put into the kiln and melted into a uniform and transparent glass liquid.

(3) The glass liquid is introduced into the centrifuge head from the leakage plate, and the ultra-fine glass wool of the centrifugation method is produced at a low flow rate of 76±2kg/h for each centrifuge head.

The above is only a single specific implementation of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial changes made to the present invention by using this concept should belong to the act of violating the scope of protection of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims (1)

1. a centrifuging super glass wool, it is characterized in that described microglass fiber diameter 90% is that normal distribution is in 2��4 �� m, microglass fiber length 85% is that normal distribution is within the scope of 2��3cm, fiber is pliable and tough, impulse-free robustness and fracture, and its composition mass percentage is: 63.0��66.5%SiO₂, 1.4��3.0%Al₂O₃, 5.5��7.5%CaO, 1.5��3.0%MgO, 0.4��1.3%K₂O, 14.2��16.0%Na₂O, 5.5��7.6%B₂O₃; Preparing this centrifuging super glass wool, its method is:

(1) every 1000Kg raw material is selected and is reclaimed dull and stereotyped glass cullet 230��270Kg, quartz sand 250��290Kg, feldspar 110��140Kg, Wingdale 14��30Kg, rhombspar 50��80Kg, soda ash 95��110Kg, BORAX PENTAHYDRATE-99.9 MIN 120��140Kg;

The dull and stereotyped glass cullet of the recovery wherein chosen require main component content: 72%��SiO₂�� 73%, 8%��CaO��9%, 4%��MgO��5%, 14%��Na₂O+K₂O��15%;

The quartz sand wherein chosen requires main component content: 97.5%��SiO₂�� 99%, 0.8%��CaO��1.0%, 0.9%��MgO��1.0%, 0.9%��Al₂O₃�� 1.0%;

The feldspar wherein chosen requires main component content: 70.0%��SiO₂�� 71.0%, 0.8%��CaO��1.0%, 0.9%��MgO��1.0%, 16.0%��Al₂O₃�� 18.0%;

The limestone requirement main component content wherein chosen: 55.0%��CaO��56.5%, 0.8%��MgO��1.0%;

The rhombspar wherein chosen requires main component content: 30.5%��CaO��32.0%, 20.0%��MgO��22.0%;

The soda ash wherein chosen requires main component content: 55.0%��Na₂O��56.5%;

The BORAX PENTAHYDRATE-99.9 MIN wherein chosen requires main component content: 21.0%��Na₂O��22.5%, 48.0%��B₂O₃�� 49.0%;

(2) after raw material Homogeneous phase mixing, kiln will be dropped into, it is melting into the glass metal of homogeneous transparent;

(3) glass metal is imported spinning head from bushing, with the obtained centrifuging super glass wool of the flow of each spinning head 76 �� 2Kg/h.