Preparation method of rock wool

A technology of rock mineral wool and basalt, which is applied in glass manufacturing equipment, manufacturing tools, etc., can solve the problems of solid waste utilization of alkali-free glass fiber waste silk, batching and tempering, etc., to improve melt quality, reduce emissions, The effect of low melting temperature

Inactive Publication Date: 2021-02-02
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Utilizing this application, the problem of solid waste utilization of a large amount of alkali-free glass fiber waste can be solved; on the other hand, it can solve the current problem of using hot slag to produce slag wool ingredients and tempering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Raw material: 50wt% hot slag, 30wt% non-alkali glass waste silk, 20wt% basalt. Among them, the fiber length of alkali-free glass waste silk is 10-30mm, and the particle size of basalt is 5-20mm.

[0027] Hot slag composition includes: SiO 2 : 32%, Al 2 o 3 : 12%, CaO: 35%, MgO: 16%, the first other ingredients 5%.

[0028] The composition of alkali-free glass waste silk includes: SiO 2 : 60%, Al 2 o 3 : 20%, CaO: 15%, MgO: 0%, the second other components 5%.

[0029] Basalt components include: SiO 2 : 50%, Al 2 o 3 : 20%, CaO: 10%, MgO: 5%, the third other components 15%.

[0030] (2) Put the hot slag into the kiln and melt it at 1200°C;

[0031] (3) Heat and melt the waste alkali-free glass at 1250°C to form a glass melt.

[0032] The basalt is heated and melted at 1250°C to form basalt melt.

[0033] (4) Then the glass melt and basalt melt are respectively introduced into the kiln and mixed with hot slag, heated to 1350°C again to react to form a draw...

Embodiment 2

[0036] (1) Raw materials: hot molten slag 60wt%, alkali-free glass waste silk 10wt%, basalt 30wt%. Among them, the fiber length of alkali-free glass waste silk is 30-50mm, and the particle size of basalt is 15-20mm.

[0037] Hot slag composition includes: SiO 2 : 40%, Al 2 o 3 : 15%, CaO: 30%, MgO: 7%, the first other ingredients 8%.

[0038] The composition of alkali-free glass waste silk includes: SiO 2 : 50%, Al 2 o 3 : 24%, CaO: 9%, MgO: 10%, the second other components 7%.

[0039] Basalt components include: SiO 2 : 50%, Al 2 o 3 : 12%, CaO: 10%, MgO: 8%, the third other components 20%.

[0040] (2) Put the hot slag into the kiln and melt it at 1300°C;

[0041] (3) Heat and melt the waste alkali-free glass at 1350°C to form a glass melt.

[0042] The basalt is heated and melted at 1350°C to form a basalt melt.

[0043] (4) Then the glass melt and basalt melt are respectively introduced into the kiln and mixed with hot slag, heated to 1450°C again to react to ...

Embodiment 3

[0046] (1) Raw materials: hot slag 70wt%, alkali-free glass waste silk 28wt%, basalt 2wt%. Among them, the fiber length of alkali-free glass waste silk is 15-30mm, and the particle size of basalt is 10-15mm.

[0047] Hot slag composition includes: SiO 2 : 30%, Al 2 o 3 : 20%, CaO: 36%, MgO: 9%, the first other ingredients 5%.

[0048] The composition of alkali-free glass waste silk includes: SiO 2 : 70%, Al 2 o 3 : 8%, CaO: 16%, MgO: 1%, the second other components 5%.

[0049] Basalt components include: SiO 2 : 41%, Al 2 o 3 : 15%, CaO: 12%, MgO: 12%, the third other components 20%.

[0050] (2) Put the hot slag into the kiln for melting at 1100°C;

[0051] (3) Heat and melt the waste alkali-free glass at 1300°C to form a glass melt.

[0052] The basalt is heated and melted at 1300°C to form basalt melt.

[0053] (4) Then the glass melt and basalt melt are respectively introduced into the kiln and mixed with hot slag, and heated to 1400°C again to react to form a...

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Abstract

The invention discloses a preparation method of rock wool, and the method specifically comprises the following steps of: putting raw materials into a kiln, and performing melting and wire drawing to obtain rock wool; wherein the raw materials comprise 50-90wt% of hot melt slag, 5-30wt% of alkali-free glass waste wires and 2-30wt% of basalt. By means of the method, a large amount of alkali-free glass fiber waste silk solid waste can be utilized at present; and on the other hand, the problem of blending and hardening and tempering of mineral cotton produced by hot melt slag is solved. The threeraw materials almost have no silicate reaction during heating, so that the emission of carbon dioxide waste gas is greatly reduced. Due to the fact that the reaction amount is small and the emission amount of carbon dioxide is extremely small, heat energy consumption can be reduced, the heat utilization rate is increased, and fuel consumption is reduced.

Description

technical field [0001] The invention relates to a preparation method of rock mineral wool. Background technique [0002] According to statistics, in 2019, the annual output of alkali-free glass fiber in my country is about 4.8 million tons, and the amount of waste silk is about 400,000 tons. These waste silks are generally seldom returned to the furnace for use, and a large amount of waste silks returned to the furnace for melting will affect product quality. As a result, a large amount of waste silk cannot be used, and glass fiber companies have to spend costs to ask other companies to dispose of it. Generally, landfill treatment is used, resulting in waste of land resources and pollution. Contents of the invention [0003] In order to solve the above problems, the present invention proposes a method for preparing rock and mineral wool, which specifically includes putting raw materials into a kiln for melting and wire drawing to make rock and mineral wool; the raw materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/005C03C13/06
CPCC03B37/005C03C13/06C03C3/087
Inventor 唐宇黄健健李卫军夏江华
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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