CN1099359A

CN1099359A - Formula and process of preparing devitroceram using flyash

Info

Publication number: CN1099359A
Application number: CN 93115755
Authority: CN
Inventors: 陈树军; 赵凤宇
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-21
Filing date: 1993-08-21
Publication date: 1995-03-01

Abstract

The raw materials of this invention include: flyash, silica, quartz powder, alumina, zinc oxide, calcium oxide, soda ash, potash, sodium nitrate, titanium oxide, fluorite. white arsenic. Its preparation process includes: compounding, high-temp. melting at a temp. of at 1400-1600 deg.C., water quenching, shaping, high-temp. crystallization, at 900-1300 deg.C for 10 hrs, annealing, demoulding, finally, grinding polishing, cutting and packing.

Description

Formula and process of preparing devitroceram using flyash

The present invention relates to a kind of prescription and technology of utilizing the fuel-burning power plant to discharge waste fly-ash Preparation devitrified glass.

Well-known devitrified glass has favorable mechanical performance and physicals, and its hardness is Mohs 6-9, and compressive strength is 6.3T/cm ², folding strength is 487-1380Kg/cm ², resistance to impact shock is 2.5-3.8Kg/cm ², glossiness is the 70-120 degree, the coefficient of expansion is 61-77.5(10/ ℃), water-intake rate＜0.07%, wear-resisting loss is 0.49g/cm ²And good acid-fast alkali-proof performance arranged, therefore be widely used in as building materials, sheet material, tubing etc., it also can cooperate with other metallic substance and be used to make high, refined, peak products such as the no-reinforcing-bar floor of high strength bearing, high pressure vessel, pressure piping, fermentor tank, building, hollow curtain wall penel, engine cylinder and airspace engine, aerospace barnacle, rocket spout.

Present minority industry advanced country such as the U.S., USSR (Union of Soviet Socialist Republics) and Japanese small serial production crystallized glass article.They are with pure chemistry raw material SiO ₂, Al ₂O ₃, CaO, MgO etc. or mine tailing be formulated, its production method mainly contains two kinds, a kind of is rolling process, earlier with devitrified glass raw material mechanical pressing, and then carries out crystallization; Another kind is a water quenching, earlier the devitrified glass raw material is fused into the glass slag charge, and mechanical pressing or utilize the saggar moulding carries out crystallization at last again.

The purpose of this invention is to provide a kind of prescription and technology of utilizing fuel-burning power plant waste-flyash to produce devitrified glass, select for use flyash to be as the main raw material of preparation devitrified glass because flyash to observe under the high power electron microscope be the stable glass ball of chemical property, its Chemical Composition is similar to the Chemical Composition of devitrified glass, contains the main chemical such as the SiO of devitrified glass ₂25%-75%, Al ₂O ₃10%-25%, CaO1%-30% and contain MgO, Fe ₂O ₃, SO ₃And radioactive element radium-226, element such as thorium-232 grade all is the indispensable composition of preparation devitrified glass.Whether the above-mentioned Chemical Composition of flyash adds Wingdale what adds according to the coal of different areas during burning, its Chemical Composition content is different.

Prescription with the fly-ash Preparation devitrified glass is: flyash (contains SiO ₂25%-75%, Al ₂O ₃10%-25%, CaO1%-30%), 15-80%

Silicon-dioxide (or quartz sand, or ground silica or sand powder or Feldspar Powder or Erie's stone flour or coal gangue or phosphorus ore slag or cuckoo red mine stone powder and nepheline powder) 5-60%

Calcium oxide (or lime carbonate, or limestone powder, or calcite in powder, or ground dolomite) 10-20%

Soda ash (or potash or SODIUMNITRATE) 1-15%

Aluminum oxide powder (or aluminium metallurgy factory waste residue) 0.1-5%

Zinc oxide (or zinc training sand or zinc sulfide white or barium carbonate or nitrate of baryta or barite) 1-9.4%

Titanium dioxide 0.1-1.2% borax 0.5-8% fluorite 0.5-5%

White arsenic (or compound clarifier or weisspiessglanz) 0.01-0.5%

The preparation devitrified glass can also can utilize wherein part component with the whole components in the above-mentioned prescription.Can adjust the intensity and the color of devitrified glass if add auxiliary material in above-mentioned prescription, these auxiliary materials comprise magnesium oxide, Vanadium Pentoxide in FLAKES, iron ore slag, phosphorus ore slag, slag, chrome ore slag, plumbous oxide, ferric oxide, manganese powder, cobalt powder, cadmium yellow, cadmium red, fluorite, selenium powder, cerium oxide, tartrate, potassium oxide, cupric oxide, cobalt oxide etc.For example adding an amount of cupric oxide, cobalt oxide on basestocks, can to make product be Hei Lanse; Add an amount of Fe ₂O ₃For brown or the like.

The main technique of preparation devitrified glass is:

1. batching: by the prescription each component weigh respectively, sieve, batch mixing is even, makes admixtion;

2. high temperature melting: above-mentioned admixtion inserted in the glass furnace heat, make batch melting, temperature of fusion is 1400 ℃-1600 ℃, adopts uninterrupted stuffing process (open a stream material mouthful at the furnace bottom of simple glass kiln, divide into a tank);

3. shrend: hit with the pressure cold water flow is cold simultaneously when glass metal flows into tank, make its hardening crack become the following slag particle of diameter 10mm;

4. moulding:, be mixed in proportion the mould molding of packing into pack into in-mold molding or add resulting glass slag charge such as Wingdale during with the calcining of above-mentioned slag charge and power station of above-mentioned slag charge;

5. high temperature crystallization: the slag charge in the mould of will packing into places and carries out the high temperature crystallization in the pottery kiln, and crystallization temperature is 900 ℃-1300 ℃, in 10 hours time;

6. annealing: in pottery kiln, self-annealing;

7. the demoulding: the agglomerating product is poured out from mould;

8. at last product is ground, polishes, cuts, packs, promptly obtain finished product.

Mechanical property and physical and chemical index with the devitrified glass of prescription of the present invention and prepared are:

Mohs' hardness 5.8-8.78, compressive strength 5.8-6.4t/cm ²

Resistance to impact shock 1.8-3.1Kg-cm/cm ³

Glossiness＞100 degree proportion 1.1-2.4g/cm ³

Water-intake rate＜0.054

Utilize the waste-flyash in fuel-burning power plant to succeed as the preparation devitrified glass, not only provide the easiest cheap raw material that obtains for producing devitrified glass, and open up a new approach for total utilization of PCA, for alleviating environmental pollution, improve global environment and have important meaning.

Embodiment one total amount 100

Flyash 21.39 silica powders 39.28

Zinc oxide 3.66 lime carbonate 19.28

Aluminum oxide 4.56 SODIUMNITRATE 1.48

Titanium dioxide 0.69 yellow soda ash 8.52

White arsenic 0.13 fluorite 1.01

Above basestocks adds MnO ₂Can be made into the chocolate product.

Embodiment two total amounts 100

Flyash 40.73 silica powders 9.65

Zinc is trained husky 4.01 lime carbonate 10.73

Coal gangue 2.3 SODIUMNITRATE 1.09

White arsenic 0.06 cuckoo red mine stone powder 22.96

Yellow soda ash 8.52

Embodiment three total amounts 100

Flyash 30.36 cuckoo red mine stone powder 48.59

Calcite 10.22 silica powders 4.31

Yellow soda ash 3.7 fluorites 1.32 zinc sulfide white 1.5

Embodiment four total amounts 100

Flyash 44.68 Feldspar Powders 30.63 zinc training husky 1.62

Lime carbonate 11.21 ground silicas 4.27 barites 1.35

Borax 1.175 soda ash+potash 5.065

Embodiment five total amounts 100

Flyash 52.19 silica powders 28.69

Lime carbonate 10.16 yellow soda ash 7.22

Zinc sulfide white 1.71 compound clarifiers 0.03

Embodiment six

Flyash 50.01 cuckoo red mine stone powder 18.45

Rhombspar 10.52 sand powder 6.08

Yellow soda ash 7.23 coal gangues 4.61

Barium carbonate 1.06 fluorites 1.04 zinc oxide 1

Embodiment seven

Flyash 50.2 silica powders 10.21

Wingdale 11.27 soda ash 8.5

Phosphorus ore slag 15.21 boraxs 1.5

Fluorite 0.91 zinc sulfide white 2.2

Claims

1, the prescription with the fly-ash Preparation devitrified glass is: flyash

(contain SiO ₂25%-75%, Al ₂O ₃10%-25%, CaO1%-30%) 15-80%

Calcium oxide (or lime carbonate, or limestone powder, or calcite in powder, or ground dolomite)

10-20%

Soda ash (or potash or SODIUMNITRATE) 1-15%

Aluminum oxide powder (or aluminium metallurgy factory waste residue) 0.1-5%

Titanium dioxide 0.1-1.2% borax 0.5-8% fluorite 0.5-5%

White arsenic (or compound clarifier or weisspiessglanz) 0.01-0.5%;

2,, it is characterized in that whole components in the available prescription, also available wherein part component according to the described prescription of claim 1;

3, utilize the technology of fly-ash Preparation devitrified glass to be characterised in that:

(1) batching: by the prescription each component weigh respectively, sieve, batch mixing evenly makes admixtion;

(2) high temperature melting: above-mentioned admixtion inserted in the glass furnace heat, make batch melting, temperature of fusion is 1400 ℃-1600 ℃, (furnace bottom of simple glass kiln is opened a stream material mouthful, divide into a tank);

(3) shrend: hit with the pressure cold water flow is cold simultaneously when glass metal flows into tank, make its hardening crack become the following slag particle of diameter 10mm;

(4) moulding:, be mixed in proportion the mould molding of packing into pack into in-mold molding or add resulting glass slag charge such as Wingdale during with the calcining of above-mentioned slag charge and power station of above-mentioned slag charge;

(5) high temperature crystallization: the slag charge in the mould of will packing into places and carries out the high temperature crystallization in the pottery kiln, and crystallization temperature is 900 ℃-1300 ℃, in 10 hours time;

(6) annealing: in pottery kiln, self-annealing;

(7) demoulding: the agglomerating product is poured out from mould;

(8) at last product is ground, polishes, cuts, packs, promptly obtain the devitrified glass finished product;

4,, it is characterized in that it is to adopt uninterrupted stuffing means that admixtion is inserted the stuffing means of heating in the glass furnace according to the described technology of claim 3.