CN104557089A

CN104557089A - Preparation method of environment-friendly alkaline-free fireproof fibers

Info

Publication number: CN104557089A
Application number: CN201510006513.8A
Authority: CN
Inventors: 李科; 李强; 刘伟; 孙佳; 王荣华; 杨国强; 张小娟; 张涛
Original assignee: Shandong Liyoun New Material Co Ltd
Current assignee: Shandong Liyoun New Material Co Ltd
Priority date: 2015-01-07
Filing date: 2015-01-07
Publication date: 2015-04-29

Abstract

The invention belongs to the field of fireproof fibers and particularly relates to a preparation method of environment-friendly alkaline-free fireproof fibers. The fibers are prepared by preparing raw materials, melting, centrifugally throwing threads or blowing to form fibers by using natural diopside, quartz sands, calcite, coal gangue and phosphate ores as the raw materials. The diameters of the obtained fibers are 1-10 mm and the lengths are 50-200 mm. The fibers have the advantages of high degree of fire resistance, non-combustion property, low shot content, good biodegradability and the like, and are aluminium silicate fiber substitute materials which are widely applied to various thermal equipment and pipelines.

Description

A kind of preparation method of environment-friendly type alkali-free refractory fibre

Technical field

The invention belongs to refractory fibre field, be specifically related to a kind of preparation method of environment-friendly type alkali-free refractory fibre.

Background technology

The advantage of alumina silicate series refractory fibre is that serviceability temperature is high, and applied at elevated temperature performance is good, but its maximum defect is non-degradable, harmful, and causes certain harm to environment, has been subject to increasing use restriction at present in some developed countries.

European and American developed countries achieved significant achievement in the exploitation of biodegradable refractory glass fiber in recent years, its main component is silica, aluminium oxide, calcium oxide, boron oxide, magnesia, sodium oxide molybdena etc., according to the number of alkali content in glass, alkali-free glass fibre (sodium oxide molybdena 0% ~ 2% can be divided into, belong to aluminium borosilicate glass), medium-alkali glass fibre (sodium oxide molybdena 8% ~ 12%, the soda lime glass of genus boracic or not boracic) and high alkali glass fibre (sodium oxide molybdena more than 13% belongs to soda lime glass).Have alkali containing glass fibre refractoriness lower than 400 DEG C, high-temperature applications is restricted, with SiO ₂, MgO and CaO be that the alkali-free refractory fibre of main component continues serviceability temperature and can reach more than 1000 DEG C, what have can reach 1260 DEG C, has wider safe handling temperature range, has biological degradability simultaneously, dissolve in Human Lung, decrease the occupational hazards such as pneumoconiosis silicosis.

The B of 0-5% is also added in the production of alkali-free refractory fibre in the market ₂o ₃as cosolvent, B ₂o ₃easy volatilization, causes environmental pollution.

Summary of the invention

The object of this invention is to provide a kind of preparation method of environment-friendly type alkali-free refractory fibre, adopt alkali-free without boron formula, have refractoriness high, in lung liquid, degradation rate is high, energy-conserving and environment-protective feature.

A preparation method for environment-friendly type alkali-free refractory fibre, is characterized in that, its preparation process is as follows:

1) according to SiO ₂, MgO, CaO, Al ₂o ₃, Fe ₂o ₃and P ₂o ₅quality proportioning take the quality of natural diopside, quartz sand, calcite, gangue and rock phosphate in powder, and to pulverize;

2) natural diopside, quartz sand and rock phosphate in powder are put in melting furnace heat to about 1450-1500 DEG C, and keep temperature until raw materials melt;

3) impurity in filtering molten liquid and filtered fluid is passed in stirred tank;

4) calcite and gangue are fed in melting furnace heat to about 2000-2200 DEG C, and keep temperature until raw materials melt;

5) filter the impurity of calcite fused solution, and pass in stirred tank;

6) fused solution of stirred tank mix and blend twice injection, forms mixed melting liquid until stir;

7) the mixed melting liquid be stirred forms fiber by physics mode, and cooling obtains required refractory fibre.

Wherein, the quality proportioning of described step 1) is SiO ₂: 55-65%, MgO:4-10%, CaO:20-35%, Al ₂o ₃: 1-5%, Fe ₂o ₃: 0.1-0.5%, P ₂o ₅: 0-5%.

Wherein, the powder particle diameter in described step 1) is 50 order-200 orders

Wherein, described step 2) be 0.5-3 hour with the temperature hold-time of step 4).

Wherein, the stirred tank of described step 3) adopts attemperator, outer lag.

Wherein, the holding temperature of the stirred tank of described step 3) is 1400-1600 DEG C.

Wherein, the physics mode of described step 7) is centrifugal drying silk or winding-up fibroblast.

Wherein, the type of cooling of described step 7) comprises Temperature fall cooling, also comprises and adopts external equipment cooling, as blower fan, water pump, air pump.

Wherein, the refractory fibre diameter 1-10 millimeter of described step 7), length 50-200 millimeter.

Compared with prior art, the present invention has following beneficial effect:

(1) method safety provided by the invention, reliable, meets the security regulations of process implementing.

(2) product that method provided by the invention is obtained have refractoriness high, do not fire, the advantage such as slag ball content is low, good biodegradability properties.

(3) product that method provided by the invention obtains is widely used in the alumina silicate fibre alternative materials of various Thermal Equipment and pipeline.

(4) the present invention adopts alkali-free without boron formula, and have refractoriness high, in lung liquid, degradation rate is high, energy-conserving and environment-protective feature.

Detailed description of the invention

Below in conjunction with embodiment, the present invention is described further:

Embodiment 1

Diopside 34.11Wt%, quartz sand 33.25Wt%, calcite 28.47Wt% and rock phosphate in powder 4.17Wt% are raw material, and its chemical composition is as follows: SiO ₂: 63.64%, MgO:4.77%, CaO:28.36%, Al ₂o ₃: 1.02%, Fe ₂o ₃: 0.25%, P ₂o ₅: 1.2%, co-grinding to 100 order, 1500 DEG C of meltings in resistance furnace, diameter 1-10 micron is become through centrifugal drying silk, the cellucotton of length 50-200 millimeter, this product have refractoriness high, do not fire, the advantage such as slag ball content is low, good biodegradability properties, be the alumina silicate fibre alternative materials being widely used in various Thermal Equipment and pipeline.

Embodiment 2

Diopside 43.26Wt%, quartz sand 27.05Wt%, calcite 25.90Wt% are raw material, and its chemical composition is as follows: SiO ₂: 62.03%, MgO:8.05%, CaO:27.98%, Al ₂o ₃: 1.99% Fe ₂o ₃: 0.32%, co-grinding to 100 order, 1400 DEG C of meltings in resistance furnace, diameter 1-10 micron is become through centrifugal drying silk, the cellucotton of length 50-200 millimeter, this product have refractoriness high, do not fire, the advantage such as slag ball content is low, good biodegradability properties, be the alumina silicate fibre alternative materials being widely used in various Thermal Equipment and pipeline.

Embodiment 3

Diopside 34.11Wt%, quartz sand 33.25Wt%, calcite 28.47Wt% and rock phosphate in powder 4.17Wt% are raw material, and its chemical composition is as follows: SiO ₂: 62.32%, MgO:7.02%, CaO:28.79%, Al ₂o ₃: 1.01%, Fe ₂o ₃: 0.3%, P ₂o ₅: 1.02%, co-grinding to 100 order, 1485 DEG C of meltings in resistance furnace, diameter 1-10 micron is become through centrifugal drying silk, the cellucotton of length 50-200 millimeter, this product have refractoriness high, do not fire, the advantage such as slag ball content is low, good biodegradability properties, be the alumina silicate fibre alternative materials being widely used in various Thermal Equipment and pipeline.

Embodiment 4

Diopside 34.11Wt%, quartz sand 33.25Wt%, calcite 28.47Wt% and rock phosphate in powder 4.17Wt% are raw material, and its chemical composition is as follows: SiO ₂: 62.32%, MgO:7.02%, CaO:28.79%, Al ₂o ₃: 1.01%, Fe ₂o ₃: 0.3%, P ₂o ₅: 1.02%, co-grinding to 100 order, 1485 DEG C of meltings in resistance furnace, diameter 1-10 micron is become through winding-up fibroblast, the cellucotton of length 50-200 millimeter, this product have refractoriness high, do not fire, the advantage such as slag ball content is low, good biodegradability properties, be the alumina silicate fibre alternative materials being widely used in various Thermal Equipment and pipeline.

The foregoing is only one embodiment of the invention, do not limit the present invention, the technical scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, all drop in protection scope of the present invention.

Claims

1. a preparation method for environment-friendly type alkali-free refractory fibre, is characterized in that, its preparation process is as follows:

5) filter the impurity of calcite fused solution, and pass in stirred tank;

2. the preparation method of a kind of environment-friendly type alkali-free refractory fibre according to claims 1, is characterized in that, the quality proportioning of described step 1) is SiO ₂: 55-65%, MgO:4-10%, CaO:20-35%, Al ₂o ₃: 1-5%, Fe ₂o ₃: 0.1-0.5%, P ₂o ₅: 0-5%.

3. the preparation method of a kind of environment-friendly type alkali-free refractory fibre according to claims 1, is characterized in that, the powder particle diameter in described step 1) is 50 order-200 orders.

4. the preparation method of a kind of environment-friendly type alkali-free refractory fibre according to claims 1, is characterized in that, described step 2) be 0.5-3 hour with the temperature hold-time of step 4).

5. the preparation method of a kind of environment-friendly type alkali-free refractory fibre according to claims 1, is characterized in that, the stirred tank of described step 3) adopts attemperator, peripheral hardware muff.

6. the preparation method of a kind of environment-friendly type alkali-free refractory fibre according to claims 1, is characterized in that, the holding temperature of the stirred tank of described step 3) is 1400-1600 DEG C.

7. the preparation method of a kind of environment-friendly type alkali-free refractory fibre according to claims 1, is characterized in that, the physics mode of described step 7) is centrifugal drying silk or winding-up fibroblast.

8. the preparation method of a kind of environment-friendly type alkali-free refractory fibre according to claims 1, is characterized in that, the type of cooling of described step 7) comprises Temperature fall cooling, also comprises and adopts external equipment cooling, as blower fan, water pump, air pump.

9. the preparation method of a kind of environment-friendly type alkali-free refractory fibre according to claims 1, is characterized in that, the refractory fibre diameter 1-10 millimeter of described step 7), length 50-200 millimeter.