CN1530347A - Light fire brick and preparing method thereof - Google Patents

Abstract

A light-weight refractory brick burnt in tunnel kiln and oil-burning vertical kiln is prepared from bauxite, phosphoric acid, magnesium bihydrogen phosphate, aluminate cement, and H2O2. Said bauxite contains Al2O3 (more than 80%), magnesium oxdie (less than 0.25%), potassium oxide (less than 0.25%), sodium oxide (less than 0.25%), and calcium oxide (less than 0.25%). Its advantages are low cost, high resistance to high temp, high insulating effect, high strength, and long service life.

Description

Light fire brick and preparation method thereof

Technical field

The present invention relates to light fire brick of a kind of tunnel furnace and oily shaft furnace and preparation method thereof.

Background technology

1700～1800 ℃ of tunnel furnace and the oily shaft furnace more than 1800 ℃ are the big power consumers, and a hyperthermia tunnel Kiln expendable weight every day oil will be above 10 tons, and its reason is not have perfect energy-conservation facility, and best conservation measures is to adopt high-intensity light fire brick.At present, the light fire brick cost that the polystyrene bead method is produced is high, and its explant price is about 1.5～2.0 ten thousand yuan/m ³, and intensity is not high, has seriously influenced the economic benefit of tunnel furnace and oily shaft furnace industry, therefore, is badly in need of a kind of cost is low, intensity is high light fire brick and feasible preparation method thereof.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of cost is low, intensity is high light fire brick and feasible preparation method thereof.

In order to solve the problems of the technologies described above, the formula for a product that the present invention adopts is:

A. aluminium vanadine 100 restrains;

B. be benchmark with 100 gram aluminium vanadine

(1) phosphatase 11 0～15ml, concentration is 32～40% by weight;

(2) primary magnesium phosphate 10～15ml, concentration is 25～35% by weight;

(3) aluminate cement 2～6%;

(4) hydrogen peroxide 2.5～3.0ml;

The content of aluminium sesquioxide is not less than 80% in the described aluminium vanadine, and magnesian content is not more than 0.25%, and the content of potassium oxide is not more than 0.25%, and the content of sodium oxide is not more than 0.25%, and the content of calcium oxide is not more than 0.25%; The water-intake rate of described aluminium vanadine is 4～5%, and fineness is not more than 60 orders.

Two hydrogen aluminium or ammonium di-hydrogen phosphate that described phosphoric acid can be 32～40% by concentration by weight, add-on is 10～15ml replace.

Described aluminate cement is alumina cement, low calcium-aluminate cement or fine aluminium acid salt cement.

The present invention adopts chemical process to prepare light fire brick, and its specific embodiment is as follows:

A. at first the aluminate cement thorough mixing of 100 gram aluminium vanadine and 2～6% is made mixture A;

B. then with 10～15ml by weight concentration be 25～35% biphosphate magnesium solution and 10～15ml by weight concentration be that the hydrogen peroxide thorough mixing of 32～40% phosphoric acid, two hydrogen aluminium or biphosphate ammonia solution and 2.5～3.0ml is made mixture B;

C. mixture A and mixture B are poured into together and pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

Because having adopted hydrogen peroxide in formula for a product is wedding agent as pore forming material and employing phosphoric acid salt, in high temperature, form magnesium-aluminium spinel heat-resistant stable phase gradually, therefore, characteristics such as the present invention has that cost is low, refractory temperature is high, high insulating effect, intensity height, wear-resisting, long service life, its volume density is at 0.7m～1.1g/cm simultaneously ³Between.

Description of drawings

Fig. 1 is preparation method's process flow diagram of the present invention.

Embodiment

Embodiment 1

At first 100 gram aluminium vanadine and 3.5 gram alumina cement thorough mixing are made mixture A;

Then with 10ml by weight concentration be 35% biphosphate magnesium solution and 10ml by weight concentration be that 40% phosphoric acid and the hydrogen peroxide thorough mixing of 2.5ml are made mixture B;

Mixture A and mixture B poured into together pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

Embodiment 2

At first 100 gram aluminium vanadine and 4.5 gram alumina cement thorough mixing are made mixture A;

Then with 15ml by weight concentration be 30% biphosphate magnesium solution and 15ml by weight concentration be that 32% phosphoric acid and the hydrogen peroxide thorough mixing of 2.5ml are made mixture B;

Mixture A and mixture B poured into together pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

Embodiment 3

At first 100 gram aluminium vanadine and 4 gram alumina cement thorough mixing are made mixture A;

Then with 10ml by weight concentration be 35% biphosphate magnesium solution and 10ml by weight concentration be that 40% dioxygen aluminium and the hydrogen peroxide thorough mixing of 2.5ml are made mixture B;

Mixture A and mixture B poured into together pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

Embodiment 4

At first 100 gram aluminium vanadine and 4 gram alumina cement thorough mixing are made mixture A;

Then with 15ml by weight concentration be 30% biphosphate magnesium solution and 15ml by weight concentration be that 32% dioxygen aluminium and the hydrogen peroxide thorough mixing of 2.5ml are made mixture B;

Mixture A and mixture B poured into together pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

Embodiment 5

At first 100 gram aluminium vanadine and 4 gram alumina cement thorough mixing are made mixture A;

Then with 10ml by weight concentration be 35% biphosphate magnesium solution and 10ml by weight concentration be that 40% ammonium di-hydrogen phosphate and the hydrogen peroxide thorough mixing of 2.5ml are made mixture B;

Mixture A and mixture B poured into together pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

Embodiment 6

At first 100 gram aluminium vanadine and 4 gram alumina cement thorough mixing are made mixture A;

Then with 15ml by weight concentration be 30% biphosphate magnesium solution and 15ml by weight concentration be that 32% ammonium di-hydrogen phosphate and the hydrogen peroxide thorough mixing of 2.7ml are made mixture B;

Mixture A and mixture B poured into together pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

Embodiment 7

At first 100 gram aluminium vanadine and 6 gram alumina cement thorough mixing are made mixture A;

Then with 10ml by weight concentration be 35% biphosphate magnesium solution and 10ml by weight concentration be that 40% phosphoric acid and the hydrogen peroxide thorough mixing of 3.0ml are made mixture B;

Mixture A and mixture B poured into together pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

Embodiment 8

At first 100 gram aluminium vanadine and 6 gram alumina cement thorough mixing are made mixture A;

Then with 15ml by weight concentration be 30% biphosphate magnesium solution and 15ml by weight concentration be that 32% phosphoric acid and the hydrogen peroxide thorough mixing of 3.0ml are made mixture B;

Mixture A and mixture B poured into together pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

Embodiment 9

At first 100 gram aluminium vanadine and the low calcium-aluminate cement thorough mixing of 4 grams are made mixture A;

Then with 12ml by weight concentration be 35% biphosphate magnesium solution and 12ml by weight concentration be that 40% phosphoric acid and the hydrogen peroxide thorough mixing of 2.7ml are made mixture B;

Mixture A and mixture B poured into together pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

Embodiment 10

At first 100 gram aluminium vanadine and 5 gram fine aluminium acid salt cement thorough mixing are made mixture;

Then with 14ml by weight concentration be 30% biphosphate magnesium solution and 14ml by weight concentration be that 32% phosphoric acid and the hydrogen peroxide thorough mixing of 2.8ml are made mixture B;

Mixture A and mixture B poured into together pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

Claims (5)

1. light fire brick is characterized in that formula for a product is:

A. aluminium vanadine 100 restrains;

B. be benchmark with 100 gram aluminium vanadine

(1) phosphatase 11 0～15ml, concentration is 32～40% by weight;

(2) primary magnesium phosphate 10～15ml, concentration is 25～35% by weight;

(3) aluminate cement 2～6%;

(4) hydrogen peroxide 2.5～3.0ml;

2. a kind of light fire brick according to claim 1, the content that it is characterized in that aluminium sesquioxide in the described aluminium vanadine is not less than 80%, magnesian content is not more than 0.25%, the content of potassium oxide is not more than 0.25%, the content of sodium oxide is not more than 0.25%, and the content of calcium oxide is not more than 0.25%; The water-intake rate of described aluminium vanadine is 4～5%, and fineness is not more than 60 orders.

3. a kind of light fire brick according to claim 1 is characterized in that described phosphoric acid can be 32～40% by concentration by weight, add-on is 10～15ml two hydrogen aluminium or ammonium di-hydrogen phosphate replace.

4. a kind of light fire brick according to claim 1 is characterized in that described aluminate cement is alumina cement, low calcium-aluminate cement or fine aluminium acid salt cement.

5. preparation method according to the described light fire brick of claim 1 is characterized in that adopting following method preparation by institute to formula for a product:

A. at first the aluminate cement thorough mixing of 100 gram aluminium vanadine and 2～6% is made mixture A;

B. then with 10～15ml by weight concentration be 25～35% biphosphate magnesium solution and 10～15ml by weight concentration be that the hydrogen peroxide thorough mixing of 32～40% phosphoric acid, two hydrogen aluminium or biphosphate ammonia solution and 2.5～3.0ml is made mixture B;

C. mixture A and mixture B are poured into together and pour in the model behind the thorough mixing, this model is that two-opening type and plastic lining paper are in order to the demoulding, the demoulding after air-set in 24 hours, under 110～200 ℃, heat-treat, under 1450～1750 ℃, burn till then, after brick cutting machine, rattler processing, get product.

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