Refractory Bricks, Monolithic Refractory, Insulation Refractory, etc.

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Jun 30, 2021
High Chrome Bricks

High Chrome Bricks Technical Data

Item RS-Cr94 RS-Cr92 RS-Cr90 RS-Cr80
Cr2O3 % 94 92 90 80
TiO2 % 3.8 3.8 4 –
Apparent Porosity % ≤16 ≤20 ≤20 ≤20
Bulk Density g/cm3 ≥4.33 ≥4.05 ≥4.1 ≥4.00
Cold compressive Strength MPa ≥200 ≥100 ≥100 ≥100
0.2Mpa Refractoriness Under Load T0.6 ℃ ≥1700 ≥1680 ≥1680 ≥1670

 Application of High Chrome Bricks

High chrome brick (Cr2O3 ≥ 90%) is mainly used for coal chemical industry, chemical industry furnace, alkali-free glass fiber kiln, waste incinerator and other key parts of the furnace.

Zhengzhou RongSheng Kiln Refractory Co. Ltd. is one of leading manufacturers and distributors of high quality refractories for use in industries including steel plants, cement producers and glass works.
Our company can provide not only the domestic and foreign customers excellent quality of high-temperature thermal insulation material, but also the first-rate service including professional furnace lining design, installation supervision, engineering construction etc.

We can provide our customers with professional and personalized products and engineering services according to the actual working condition and requirements of each customer, in order to meet customers’ increasing demand of energy-saving and products quality improving, Our tenet is: quality and credibility is fundamental, technology and service is the life.

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Jun 30, 2021
Slide Gate Plate

High performance slide plate characteristics

1. Slide plate carbon content is low, oxidization caused large area scratch seldom happens, so it is more suitable for low carbon steel and ultra low carbon steel casting.
2. Slide plate has high mechanical strength at high temperature, multi times continuous sliding caused dilatation is reduced.
3. Good thermal shock resistance. Stripping phenomenon is avoided, there is only small crack, steel casting safety is ensured.
4. Special composite carbon is adopted, oil impregnation procedure is avoided, working environment is improved.

High performance slide plate physiochemical indexes

Item RS-HB-A RS-HB-B RS-HB-C RS-HB-D
Al2O3 % 75 80 80 70
MgO % / / /
ZrO2 % / / / 5
C ≤6 ≤6 ≤8 3
Bulk density g/cm3 ≥ 3 3.05 2.95 3
Apparent porosity %≤ 10 10 10 11
Crushing strength Mpa ≥ 100 120 100 95

High temperature sintered slide plate

High temperature sintered slide plates feature in high mechanical strength, washing resistance, good thermal shock resistance and so on. High temperature intered slide plate are first choice for large and middle size steel ladles and tundish continuous casting.  We supply alumina carbon high temperature sintered slide plate, alumina zirconia carbon high temperature sintered slide plates and magnesia spinel slide plate, which can meet various species of steel casting requirement.

High temperature sintered slide plate physiochemical indexes

Item RS-SHB-A RS-HB-B RS-HB-C RS-HB-D
Al2O3 % 70 75 75 60
MgO % / / 4 /
ZrO2 % / / 4 /
C 4 4 4 4
Bulk density g/cm3 ≥ 2.85 2.9 3.05 3
Apparent porosity %≤ 6 6 6 6
Crushing strength Mpa ≥ 90 100 100 100
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Jun 30, 2021
Ladle Nozzle

 

Ladle upper nozzle physiochemical indexes

Item RS-SSK-1 RS-SSK-2 RS-SSK-3 RS-SSK-4
Al2O3 % ≥ 80 75 60 65
MgO % ≥ / / /
C % ≤6 ≤6 4 4
Bulk density g/cm3 ≥ 2.9 2.8 2.6 2.65
Modulus of rupture Mpa ≤ 15 15 15 15
Crushing strength Mpa ≥ 70 60 40 25

 

Ladle lower nozzle

RS series lower nozzle raw materials are corundum, high alumina bauxite, flake graphite, antioxidant, phenolic resin and so on. Lower nozzles character in good thermal shock resistance, strong erosive corrosion resistance, good rupture resistance and so on.

Item RS-XSK-1 RS-XSK-2 RS-XSK-3 RS-XSK-4 RS-XSK-5
Al2O3 % ≥ 75 55 68 60 65
MgO % ≥ / / / /
C % 6 5 4 4 4
Bulk density g/cm3 ≥ 2.8 2.6 2.7 2.7 2.65
Apparent porosity % ≤ 15 15 15 15 15
Crushing strength Mpa ≥ 60 40 40 40 25

 

Long nozzle(ladle shroud)

Long nozzle is functional refractory connects ladle and tundish. Long nozzle plays the role of stabilizing steel liquid flow state, avoiding steel liquid oxidization, keeping steel liquid from splashing, etc. RS series high grade roasting-free long nozzle has excellent thermal shock resistance, good steel liquid washout resistance, excellent slag resistance and so on. Besides, RS long nozzles also feature in convenient operation, significant improvement of working condition.

 

Long nozzle physiochemical indexes

Item RS-CSK-1 RS-CSK-2 RS-CSK-3 RS-CSK-4
RS-CSK-5
Main body Slag line Main body Slag line
Al2O3 % 45 / 45 35 40 50
SiO2 % 20 / 20 25 20 10
C+SiC  % 25 25 25 40 25 25
ZrO2 % / 60 / / / /
Bulk density g/cm3 ≥ 2.3 3 2.3 2 2.25 2.3
Apparent porosity % 20 19 20 19 23 20
Crushing strength Mpa ≥ 22 10 22 10 22 22
Cold modulus of rupture Mpa ≥ 6 4 6 4 6 6
Thermal shock resistance (1100℃, water cooling)/times 5 5 5 5

 

Submerged entry nozzle

Submerged entry nozzle plays the role of keep steel liquid from air oxidization when it flows from tundish to crystallizer, besides, it also has the function of evenly distributing steel liquid to crystallizer and controlling  steel liquid flow state at crystallizer. RS series submerged nozzle has  good slag corrosion resistance, blocking resistance, long service life, low accident rate and so on.

 

Submerged entry nozzle physiochemical indexes

Item RS-JSK-1 RS-CSK-2 RS-CSK-3
Main body Slag line Main body Slag line Main body Slag line
Al2O3 % ≥ 40 / 45 / 35 /
SiO2 % ≤ 20 / 15 / 25 /
C+SiC  % ≥25 ≥13 ≥22 ≥13 ≤40 ≤25
ZrO2 % / 70 / 75 / 60
Bulk density g/cm3 ≥ 2.2 3.4 2.3 3.55 2 3
Apparent porosity %≤ 20 19 18 18 19 19
Crushing strength Mpa ≥ 20 20 20 14 10 10
Cold modulus of rupture Mpa ≥ 6 5 8 5 4 4
Thermal shock resistance (1100℃, water cooling)/times 5 5 5

 

Tundish upper nozzle

Tundish upper nozzle is inserted into well block during using, it can control steel liquid flow rate combined with stopper. RS series tundish upper nozzle has excellent washout resistance, good thermal shock stability, good corrosion resistance and blockage resistance. When matched with RS series integral stopper, tundish continuous casting times can be significantly increased.

Item RS-HBZ-A R RS-HBZ-B
Chemical composition(%) ≥ Al2O3 55 60
ZrO2 5 5
C 3 8
Bulk density g.cm3 ≥ 2.85 2.85
Apparent porosity % ≤ 15 15
Crushing strength Mpa ≥ 60 40

 

Tundish upper nozzle physiochemical indexes

Item RS-ZSK-1 RS-ZSK-2 RS-ZSK-3
Main body Bowl part Main body Bowl part Main body Bowl part
Al2O3 % ≥ 45 65 45 50 45 /
SiO2 % ≤ 15 10 15 5 15 /
C+SiC % ≥ 22 10 22 ≤20 22 ≤20
MgO % ≥ / / / 15 / 60
Bulk density g/cm3 ≥ 2.3 2.7 2.3 2.3 2.3 2.6
Apparent porosity %≤ 18 16 18 17 18 19
Crushing strength Mpa ≥ 20 25 20 20 20 15
Cold modulus of rupture Mpa ≥ 8 8 8 10 8 5
Thermal shock resistance (1100℃, water cooling)/times ≥5 ≥5 ≥5

 

Tundish porous upper nozzle

To prevent blockage, traditional tundish upper nozzle and submerged nozzle service life is short. So porous tundish upper nozzle is developed to overcome this shortcoming. According to structure and function, tundish porous upper nozzles are classified into non-fast changing porous upper nozzle and fast changing porous upper nozzle(submerged nozzle can be quickly changed to promise the consistency of casting). Especially porous fast changing upper nozzle can significantly increase tundish life, although the service life of submerged nozzle is relatively low. Currently used slab tundish service life is longer than 10 hours.

Item RS-TZSK-1 RS-TZSK-2 RS-TZSK-3
Main body Bowl part Porous inner lining Main body Bowl part porous inner lining
Al2O3 % ≥ 45 65 55 65 50 50 50
SiO2 % ≤ 25 10 5 10 10 5 10
C+SiC % ≥ 25 10 20 / 22 ≤20 22
MgO % ≥ / / / / / 15 /
Bulk density g/cm3 ≥ 2.2 2.7 2.4 2.3 2.4 2.3 2.4
Apparent porosity %≤ 20 16 25 16 18 17 18
Crushing strength Mpa ≥ 22 25 20 40 20 20 20
Modulus of rupture Mpa ≥ 5 8 5 / 8 10 8
Thermal shock resistance (1100℃, water cooling)/times ≥5 / ≥5

 

Metering nozzle

Metering nozzles mainly adopt insertion method and, are classified into ordinary metering nozzle and quick changing metering nozzle. The main chemical composition of nozzle core is zirconia, so metering nozzle has high refractoriness, good thermal shock resistance, nice corrosion resistance, washing resistance, small nozzle hole enlargement, long service life and so on. Relying on quick change system, multi-lower nozzles can be replaced during tundish casting, so tundish service is prolonged and casting efficiency is improved.

 

Regular metering nozzle inner core physiochemical indexes

Item RS-DSK-1 RS-DSK-2 RS-DSK-3 RS-DSK-4 RS-DSK-5 RS-DSK-6
ZrO2+HfO2 ≥ 64 69 79 89 93 94
Bulk density g/cm3 ≥ 3.6 3.7 3.9 4.2 4.3 4.3
Apparent porosity %≤ 23 23 23 23 21 21
Crushing strength Mpa ≥ 80 80 80 80 100 100
Refractoriness ℃ > 1790 1790 1790 1790 1790 1790

 

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Jun 30, 2021
Monoblock Stopper

Nowadays, alumina carbon monoblock stoppers are most often used, gas blowing holes or porous plug is inserted at end part of monoblock stopper. During casting, argon is blew into stopper hole, and then enters into submerged nozzle. Argon enters into steel liquid in the form of small and scattered bubbles, it can decrease the amount of agglomerated Al2O3, so it won’t deposit in subentry nozzle. To prolong the life span of monoblock stopper, end part should be made from zirconia based refractory.

Monoblock stopper physiochemical indexes

Item RS-SB-A RS-SB-B RS-SB-C RS-SB-D
Body End Body End Body End Body End
Al2O3 % ≥ 45 65 45 / 45 50 45 /
MgO %≥ / / / / / 15 / 60
Al2O3+MgO % / / / ≥ 65 / / / /
SiO2 % ≤10 / ≤10 / ≤20 ≤5 ≤20 /
C+SiC % ≥ 20 10 20 10 25 ≤20 25 ≤20
Crushing strength Mpa ≥ 20 22 20 22 22 20 22 15
Cold modulus of rupture Mpa ≥ 6 6 6 6 6 10 6 5
Apparent porosity % ≤ 19 18 19 18 20 17 20 19
Thermal shock resistance(watering cooling, 1100℃) /times 5 5 5 5

RS Group has rich experience in monoblock stoppers production. Alumina carbon stoppers and magnesia carbon stoppers are most often used for the casting of various kinds of steel, such as bloom, billet, rectangular bloom, round billet, bloom slab, sheet billet and so on.

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Jun 30, 2021
Ladle Well Block

In modern metallurgical process, air blowing smelting technique is adopted, steel ladle purging plug pocket blocks are an important functional component for this step, steel ladle purging plug pocket blocks should have the following characteristics:

1. High temperature erosion resistance
Refinery steel ladle requires very strict standards on smelting temperature and time, the max. temperature can reach to more than 1750℃. During refinery process, molten slag alkalinity has great influence on refractory materials’ service life. Steel ladle refinery slag’s alkalinity varies between 0.6~0.4, so refractory material will suffer the erosion of acid slag and basic slag which have high permeability at high temperature, and has a quick damage speed.
2. High temperature abrasion resistance
All kinds of steel ladle refinery methods all adopt compulsory stirring, which will cause severe high temperature abrasion to pocket bricks.
3. Spalling resistance
Because of intermittent operation, temperature fluctuation is very large, which easily generate thermal spalling and structural spalling, working condition is very harsh. So currently used steel ladle purging plug pocket bricks’ performance such as high temperature erosion resistance and spalling resistance should be improved.

Steel Ladle Pocket Bricks Application

Steel ladle purging plug can be divided into built-in type integral purging plug and externally fitted purging plug combination type. To prolong purging plug’s service life, enhance it’s safety coefficient and ensure no steel leaking and permeation, no matter for externally fitted purging plug or built-in purging plug, pocket bricks play and important role and should be carefully chosen.

Pocket bricks are mainly used for continuous casting tundish and matched with nozzle bricks. Pocket bricks have high etching resistance, won’t distort or crack when coupled with zirconia metering nozzle.

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Jun 30, 2021
Purging Plug Bricks

As air supply component is important functional refractory material of steel smelting, different materials and structures of air supply bricks can be used for different smelting vessels and operation conditions. There are mainly two kinds of purging plug bricks now: one is converter and electric furnace purging plug, the other is steel ladle purging plug brick. They are significantly different in working condition, using requirements, so the materials, structure and manufacturing crafts of them are different.

Converter And Electric Furnace Purging Plug

Converter bottom blowing gas supply component is important refractory material for top and bottom combined blowing craft, it plays an important role in smelting process. Top and bottom combined blowing converter’s gas supply component is magnesia carbon purging plug, which is installed at converter bottom. Currently, mainly used converter purging plug is isostatic pressing molded magnesia carbon air supply brick. This kind of purging plug brick has small expansion coefficient, good spalling resistance and long service life.

Electric furnace bottom blowing air supply components can be divided into two types. One is direct stirring system air supply bricks, which is similar to converter magnesia carbon containing, high pressure formed, sectionally combined air supply bricks. The other is indirect stirring system air supply components. Purging plug won’t contact with steel liquid directly, and air is supplied by surface air permeable ramming mass. Compared with direct stirring air supply component, indirect stirring air supply component’s service life is longer, and requires large flow rate purging plug bricks.

Converter And Electric Furnace Purging Bricks Index

Item Converter air supply component UHP air supply component Purging ramming mass
MgO % 76 81 75
C % 14 14 /
CaO % / 1.09 20
Al2O3 % / 3.0 /
Fe2O3 % / 0.89 3.5
Apparent porosity % 4.0 2.93 /
Bulk density Mpa / 56 /
Rupture strength Mpa / 23 /
High temperature rupture strength Mpa(1400℃) 10.0 12.6  
Air flow rate m3.h-1 20 / /
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