Floride-free low-boron and alkaline-free glass fiber prescription and preparation method

Abstract

The invention relates to a glass fiber production prescription, in particular to an environment-friendly alkaline-free glass fiber prescription emitting less toxic gas. The prescription is characterized in that the components include SiO2, Al2O3, B2O3, CaO, MgO, K2O and Na2O2. Compared with the E glass fiber widely applied presently, the glass fiber prepared with the prescription of the invention is improved as follows: the raw material containing floride which is most harmful is completely abandoned and the raw material containing volatile boron is largely reduced, but the glass fiber of the invention still remains similar electric performance and mechanical performance. The invention is characterized in that an alkaline-free glass fiber using blast furnace slag as one of the main raw materials, realizing reduction of operation difficulty and great reduction of exhaust emission is preferential and can be produced directly in large scale in a tank furnace including an electric boosting structure. The use of an industrial raw material easy for melting and clearing, namely, the blast furnace slag, ensures the glass fiber to have similar operating performance as the E glass fiber and to adapt to large-scale production under the existing E glass fiber tank furnace production technology.

Description

technical field

[0001] The invention relates to a fluorine-free, low-boron and alkali-free glass fiber composition and a preparation method. In particular, it is designed to match the application of industrial by-products on high-performance fibers, and also involves less harmful gas emissions and environmentally friendly glass fiber formulations. Background technique

[0002] The most widely used glass fiber composition is alkali-free glass fiber, commonly known as "E glass". With the increasing application of glass fiber, E glass fiber can no longer meet the needs due to its weaknesses such as poor acid corrosion resistance. Moreover, E-glass fiber contains more flux components, and currently the most effective and widely used are fluorite and boron compounds. The alkali-free glass fiber formulations commonly used at present all contain about 1% F 2 and 6-8% boron oxide. When melting alkali-free glass due to F 2 with SiO 2 Combined with being extremely volatile, more...

Examples

Embodiment 1

[0033] Example 1, the blast furnace slag that has been quenched at a high temperature above 1300°C from the steelmaking blast furnace is treated with an iron removal system, and the iron content is detected and controlled to be less than or equal to 0.3%. Mesh sieve all through), while grinding, add a certain amount of oxidizing compound according to the redox property of the detected blast furnace slag, such as sulfate (2-10Kg oxidizing compound is added to about 1 ton of blast furnace slag).

[0034] Weigh 100Kg of suitable blast furnace slag for grinding, detect its composition, and calculate according to the formula, add corresponding mineral raw materials such as pyrophyllite, quicklime, silica sand, etc. For melting, the input power of electric boosting accounts for 20% of the total energy consumption. The fully clarified glass uniform glass liquid is directly transported to the platinum-rhodium alloy bushing plate through the channel and drawn into glass fibers. The glas...

Embodiment 2

[0035] Example 2, take 220Kg of processed blast furnace slag as in Example 1, detect its composition, and calculate according to the formula, add corresponding mineral raw materials such as pyrophyllite, quicklime, silica sand, etc. to prepare 1000Kg of batch materials as shown in the following table, and melt in the pool kiln Carry out melting drawing glass fiber, detect glass fibrosis temperature 1240 ℃, ΔT 100 ℃.

Embodiment 3

[0036] Example 3, take 350Kg of processed blast furnace slag as in Example 1, detect its composition, calculate according to the formula, add corresponding mineral raw materials such as pyrophyllite, quicklime, and silica sand to prepare 1000Kg of batch materials as shown in the following table, and melt in the pool kiln The glass fiber was melted and drawn, and the glass fiberization temperature was detected to be 1237°C, and the ΔT was 98°C.

technical field

[0001] The invention relates to a fluorine-free, low-boron and alkali-free glass fiber composition and a preparation method. In particular, it is designed to match the application of industrial by-products on high-performance fibers, and also involves less harmful gas emissions and environmentally friendly glass fiber formulations. Background technique

[0002] The most widely used glass fiber composition is alkali-free glass fiber, commonly known as "E glass". With the increasing application of glass fiber, E glass fiber can no longer meet the needs due to its weaknesses such as poor acid corrosion resistance. Moreover, E-glass fiber contains more flux components, and currently the most effective and widely used are fluorite and boron compounds. The alkali-free glass fiber formulations commonly used at present all contain about 1% F 2 and 6-8% boron oxide. When melting alkali-free glass due to F 2 with SiO 2 Combined with being extremely volatile, more...

Examples

Embodiment 1

[0033] Example 1, the blast furnace slag that has been quenched at a high temperature above 1300°C from the steelmaking blast furnace is treated with an iron removal system, and the iron content is detected and controlled to be less than or equal to 0.3%. Mesh sieve all through), while grinding, add a certain amount of oxidizing compound according to the redox property of the detected blast furnace slag, such as sulfate (2-10Kg oxidizing compound is added to about 1 ton of blast furnace slag).

[0034] Weigh 100Kg of suitable blast furnace slag for grinding, detect its composition, and calculate according to the formula, add corresponding mineral raw materials such as pyrophyllite, quicklime, silica sand, etc. For melting, the input power of electric boosting accounts for 20% of the total energy consumption. The fully clarified glass uniform glass liquid is directly transported to the platinum-rhodium alloy bushing plate through the channel and drawn into glass fibers. The glas...

Embodiment 2

[0035] Example 2, take 220Kg of processed blast furnace slag as in Example 1, detect its composition, and calculate according to the formula, add corresponding mineral raw materials such as pyrophyllite, quicklime, silica sand, etc. to prepare 1000Kg of batch materials as shown in the following table, and melt in the pool kiln Carry out melting drawing glass fiber, detect glass fibrosis temperature 1240 ℃, ΔT 100 ℃.

Embodiment 3

[0036] Example 3, take 350Kg of processed blast furnace slag as in Example 1, detect its composition, calculate according to the formula, add corresponding mineral raw materials such as pyrophyllite, quicklime, and silica sand to prepare 1000Kg of batch materials as shown in the following table, and melt in the pool kiln The glass fiber was melted and drawn, and the glass fiberization temperature was detected to be 1237°C, and the ΔT was 98°C.