Mullite Insulation Brick

Mullite Insulation Brick Introduction

The mullite insulation brick is a high alumina refractory material with mullite (3Al2O3•2SiO2) as the main phase. Generally, the alumina content is between 65% and 75%. The standard mineral composition of mullite insulation bricks is mullite. The lower alumina content also contains a small amount of glass phase and cristobalite; the higher alumina content also contains a small amount of corundum. High refractoriness, up to 1790 °C. The load softening start temperature is 1600 to 1700 °C. Normal temperature compressive strength is 70 to 260 MPa. Good thermal shock resistance.

The mullite insulation bricks is white in color, high in use temperature, small in thermal conductivity, and low in rate of reheating. The material can reduce the volume of the thermal equipment masonry, reduce its weight, shorten the heating time, ensure the furnace temperature is uniform, reduce heat loss, save energy, improve operating conditions and improve production efficiency. Mullite insulating bricks is a very excellent lining material between heavy refractory materials and traditional insulating refractory materials (fiber products). The hot surface can directly contact the high temperature of 1600 °C for a long time.

Mullite Insulation Brick Classification

1. Mullite insulating brick are sintered mullite bricks and electric fused mullite bricks.

The sintered mullite brick is made of high alumina bauxite clinker as a main raw material, and a small amount of clay or raw bauxite is added as a binder, mullite thermal insulation bricks is formed by molding and firing.

The electric melting mullite brick is made of high alumina, industrial alumina and refractory clay, and is added with charcoal or coke fine particles as a reducing agent,Mullite insulating brick is formed by reduction electrofusion after molding.

2. Mullite insulation bricks can be divided into light mullite bricks and heavy mullite bricks according to mullite lightweight fire brick density.

3.According to the mullite lightweight fire brick application temperature, high temperature mullite insulation brick can be divided into: 1350 mullite brick, 1450 mullite brick, 1550 mullite brick and so on.

Mullite Insulation Brick Features

1. Mullite insulating light bricks is green, non-toxic, non-corrosive, safe to use.

2. Mullite thermal insulation bricks have good adaptability to cement.

3. The mullite insualtion refractory brick is foamed by a foaming mechanism to obtain a foam having a uniform bubble diameter.

4. Mullite insulation fire brick have excellent foaming performance, the foaming multiple can reach more than 30 times.

5. Mullite insulation fire brick have low thermal conductivity and good thermal insulation effect.

6. Mullite lightweight fire brick have low heat fusion, due to low thermal conductivity, mullite series of mullite lightweight insulation bricks accumulate little heat energy, energy saving effect is obvious in intermittent operation.

7. Low mullite insulation fire brick impurity content has a very low oxide content such as iron box alkali metal, so the refractoriness is high; the higher aluminum content maintains good performance under reducing atmosphere.

8.Mullite insulation fire brick have high thermal compressive strength.

9. the appearance of the mullite lightweight fire brick size is accurate, speed up the masonry, reduce the amount of refractory mud, to ensure the strength and stability of the masonry, thereby extending the life of the lining.

10. Mullite lightweight fire brick can be processed into a special shape to reduce the number of Mullite insulation refractory bricks and joints.

Mullite Insulation Brick Specification

Item	JM-23	JM-23	JM-23	JM-26	JM-26	JM-26	JM-28	JM-28
Al2o3          %	46	46	46	46	55	55	65	65
Fe2o3            %	0.8	0.8	0.8	0.7	0.7	0.7	0.6	0.6
Bulk Density         g/cm3	0,6	0.8	1.0	0.6	0.8	1.0	1.0	1.2
Cold Crushing Strength    Mpa	1.5	3.5	3.5	1.5	3.5	3.5	3.5	3.5
Thermal Shock Resistance(1100℃,water,quenching,cycle)	10	20	20	10	20	20	20	20
Reburning line change rate is not more than 1% (℃)	1300*12	1300*12	1400*12	1400*12	1400*12	1400*12	1500*12	1500*12
Thermal conductivity average temperature(350+—25℃（w/m.k）	0.2	0.23	0.26	0.20	0.26	0.32	0.32	0.4

Mullite Insulation Brick Application

Mullite refractory insulation brick is mainly used in hot air furnace top, blast furnace body and furnace bottom, glass melting furnace regenerator, ceramic sintering kiln, petroleum cracking system dead angle lining and so on.

Hot Blast Stove Refractory Material

1.Hot blast stove roof of refractory material.

2.Hot blast stove wall of refracyory material.

3.Hot blast stove insulation wall of refractory material.

Hot Blast Stove Refractory material Introduction

1. The blast furnace hot blast stove is one of the main equipments for the blast furnace of the ironmaking plant and is a heat exchange equipment. Blastfurnace is mainly used to provide high temperature hot air for the blast furnace for the reaction in the furnace. The function of the hot blast stove is to continuously provide high temperature hot air of 1000℃ or more for the blast furnace, and 25% of the heat required for blast furnace iron making comes from the hot blast stove.

2. Hot blast stoves of refractory materials require large heat capacity, good creep resistance, high load softening temperature, high temperature strength and good thermal shock resistance.

3.Refractory materials for hot blast stoves include silicon bricks, clay bricks, high alumina bricks, low creep high alumina bricks and clay bricks, lightweight heat insulation bricks, insulating refractories, spray coatings and refractory mud.

Different Refractories Material are Used in Parts for Blast Stove

1.Hot Air Stove Vault Area.

The vault is divided into a working layer, a filling layer and a heat insulating layer.

Maintaining the structural stability of the vault at high temperatures during work, evenly distribute high-temperature flue gas into the regenerator during combustion, the hot blast furnace vault area is very high, exceeding 1400 ° C. The products used in the working layer are mostly silica brick, mullite brick, andalusite brick, low creep high alumina brick. The outside of the working layer ues the insulated clay bricks.

2.Hot Air Stove Wall.

Working layer brick, filling layer and insulation layer. The working layer is made of different refractory bricks according to different temperatures, and the thickness is between 300mm and 500mm. Due to the high temperature of the upper part, the use of silica brick, mullite brick, high aluminum bricks, sillimanite bricks and clay bricks are used in the lower part of the middle part.

3.Hot Air Stove Regenerator.

The regenerator is a space filled with checker bricks, which uses internal checkered bricks to exchange heat with high-temperature flue gas and combustion-supporting air.

Checker bricks, which are heat storage and heat transfer media, need to have a large heating area, high thermal conductivity and quality to facilitate heat exchange and heat storage. Therefore, the upper part of the regenerator is made of siliceous checkered brick, and the middle of the regenerator is made of low creep high alumina brick, mullite brick, sillimanite brick and andalusite brick. Clay fire bricks in the lower part of the regenerator.

Different Hot Air Temperatures Use Different Bricks

1.When the hot blast stove classification temperature is less than 900℃, choose fire clay brick

2.When the hot blast stove classification temperature is less than 900~1100℃, the high temperature part lining and checker rerfractory brick should be made of high alumina fire brick, mullite refractory brick and sillimanite refractoy brick.

3.When the hot blast classification temperature is 1100~1200, the high temperature part lining and checker brick should be made of high alumina refractory brick, mullite brick and sillimanite brick or silica fire brick.

4.When the temperature of the hot blast stove is above 1200 ℃, the high temperature part lining and checker brick should be made of high quality silica brick and mullite brick and sillimanite brick.

5.Rongsheng refractory factory summarizes refractory materials for blast furnace hot blast stove

Acid Resistant Brick

Acid Resistant Brick Introduction

Acid Resistant Brick as a kind of hot sales refractory bricks for furnace application in Rongsheng factory manufacturing with the in the chemical industry and mostly used in acid-grooves, acid wells, acid storage tanks and impact-bearing grounds with large acid loading.There are have good properties of high acid resistance, good temperature and acid resistance, low water absorption, low oxidation at room temperature, and is not easily contaminated by media.There are high quality refractory for sale cheap in RS company can provide standard size of acid resistant brick specification and category as well as competitive price & high grade quality fireproof acid brick products, other specification and size of acid resistant fire brick according to customer requirements,welcome to contact us or email us for free quote or price list.

Acid Resistant Brick Definition

Acid resistant bricks,which is known as acid and acid resistant bricks, Refractory acid bricks are named after their unique superior acid and alkali resistance. Many people in the market are also called alkali resistant bricks. The main performance of refractory acid resistant bricks is acid and alkali resistance. The acid and acid resistant bricks produced by Rongsheng refractory brick manufacturers manufactured with the main component of acid resistant brick is silica, which forms a large amount of mullite under high temperature roasting, refractory acid fire brick is a kind of material with high acid resistance. Because of its tight structure and low water absorption, acid-resistant brick can also be used at normal temperature. Resistant to any concentration of alkaline medium, but not to high temperature molten alkali. Acid-resistant brick contains more than 70% silica and is sintered ,firebricks also have good wear resistance, corrosion resistance and pollution resistance.

Acid Resistant Brick Properties

1.Acid resistant brick have high strength, hardness, durable use.

2.Refractory acid bricks have high acid resistance, high temperature and acid resistance.

3.Refractory acid bricks has low water absorption rate,Acid fire brick is not easy to be oxidized at normal temperature, Chemical resistant bricks are not easily contaminated by media.

Acid Resistant Brick Specification

Item			Acid brick
Sio2		%	65
Bulk Density		g/cm3	1.6~1.8
Cold Crushing Strength		Mpa	15
Thermal Conductivity		W/m.K(350℃+-25℃）	0.65
Water Absorption Rate		%	5
Acid Resistance		%	98
Long-term working temperature		℃	1000
Features	Good acid resistance, small size, and remarkable corrosion and erosion resistance

Acid Resistant Brick Application

Acid resistant fire brick has the functions of high acid resistance, high water absorption and low acid and corrosion resistance. Therefore, acid brick is often used in the environment of acid, acid well, acid storage and other strong acid in chemical production, mainly because refractory acid brick is for hydrochloric acid sulfuric acid. Any concentration of acid such as nitric acid has very good anti-corrosion effect, there are many specifications of acid resistant bricks on the market. Rongsheng manufacturers can customize acid resistant fire bricks according to customer requirements to meet customer needs.

Acid Resistant Bricks Advantage

Acid resistant bricks have the advantages of high temperature resistance, corrosion resistance and low production cost, so their wear resistance is much better than ordinary bricks.Chemical acid brick also has the advantage of environmental protection, acid brick does not worry about product contamination. When Rongsheng refractory brick manufacturers produce acid-resistant bricks, most of them are customized according to customer needs. Once acid refractory bricks can meet customer needs, acid bricks can also avoid the risk of stockpiling. The acid resistant bricks are often produced according to different needs. Refractory acid bricks size is different. Nowadays, the production conditions of many industries are in a high temperature environment, the acid-resistant bricks can withstand very high temperatures because of their materials, so firebricks are widely used.

Acid Resistant Brick Manufacturing Process

1.Acid resistant bricks of raw materials

Clay, quartz, potassium feldspar

2.Acid Resistant Brick Process

❉Refractory acid bricks abrasive: After the raw materials of the fire acid resistant bricks, kaolin and magnets, acid fire bricks are ground and removed, acid bricks are blended for production.

❉Refractory acid bricks billet: After pressing and forming, the acid-resistant brick is made into the shape of the acid resistant brick needed to directly enter the drying furnace.

❉Refractory acid bricks glazing: According to the shape of acid resistant bricks, there are different ways and different glazing methods. Regardless of the method used, uniform dispersion of the glaze is ensured.

❉Refractory acid bricks casting: The formation of acid-resistant bricks is done by high temperature firing in the kiln. The glaze on the surface of the acid resistant bricks will undergo various chemical changes due to the difference in temperature.

Acid Resistant Brick Construction Step

Step 1:

Preparation for construction familiar with drawings and specifications, carry out technical disclosure, make the handover of the previous process.

Step 2:

Material preparation: The anti corrosion materials used in this project are stored in suitable warehouses , the inspection of incoming materials meets the requirements of quality.

Step 3:

the quality assurance basic requirements: After the rubber layer is accepted, acid refractory brick is cleaned and kept clean and dry. Construction environment: The anti-corrosion construction temperature is 15-30 °C, the relative humidity is not more than 80%. The amount of curing agent should be adjusted according to the temperature change. If the temperature is too low and the humidity is too high, the dehumidifier should be used to adjust the construction site. Temperature and humidity. Anti-corrosion engineering construction is afraid of water and sun exposure, which must adopt sunshade and rain-proof measures. The formulated clay and rubber compound are strictly scaled and used up within the specified period of use. The initially set cement is forbidden to use.

 Acid Resistant Bricks Precautions During the Paste Process

In the process of paving the acid resistant bricks, many users only pay attention to the beauty and use the seams without the seams, the paving is too tight, which is easy to leave hidden dangers in the future. Since the thermal expansion and contraction coefficients of the base layer, the bonding layer and the acid resistant brick itself are very different, under the thermal-cold tension damage of 1-2 years, the over-tight coating tends to cause problems such as bulging and fracture of the acid resistant brick, so adhesive seams need to be reserved during the paving process.

Where to Acid Resistant Bricks - RS Factory

RongSheng refractory factory has been engaged in refractory material industry for more than 20 years.RS refractory have a excellent technological team and have the professional sales team.

Rongsheng firebricks manufacturer can provide specification and category as well as competitive price & high-grade quality bricks products.Rongsheng firebricks factory can provide refractory acid resistant bricks density, standard acid resistant brick size according to client requirements.