Rongsheng Refractory Factory – Page 15 – Refractory Bricks, Monolithic Refractory, Insulation Refractory, etc.

Jun 29, 2021

Refractory Mortar

By function, refractory mortar is divided into insulating refractory mortar, anti-shrinkage refractory mortar and buffer refractory mortar. By the properties of binding agents, refractory mortar is classified into hydrous mortar( water and liquid chemical binder prepared) and non-hydrous(liquid organic binder prepared) refractory mortar.

Silica Refractory Mortar

Silica mortar is prepared from silica powder, silica brick powder, plastic clay, binder and additives. silica brick powder has good volume stability, it can improve silica mortar linear change rate stability. Silica refractory mortar is mainly used to line silica bricks used in blast furnace, hot blast furnace, coke furnace carbonization chamber, glass tank and spinal top of glass kiln.

Silica Refractory Mortar Physicochemical Indexes

Item	Hot blast furnace	Coke furnace carbonization chamber	Glass kiln
Refractoriness℃ ≥	1690	1670	1710
Cold compression strength (1400℃，3h) MPa ≥	3.0	3.0	3.0
cementation time/ min	1-2	1-2	1-2
Granularity ≥0.5mm %	＞1	＜3	＜2
SiO2%	94	92	96
Fe2O3 % <	1.0	—	0.7
0.2 Mpa rupture under load temperature ℃ >	1600	1500	1620

Aluminum Silicate Refractory Mortar

Aluminum silicate refractory mortar includes fireclay refractory mortar, mullite refractory mortar and high alumina refractory mortar. Plastic clay or soft clay is added into aluminum silicate mortar to workability.
There is no need to add binder in aluminum silicate mortar, but to increase binding strength, binders should be added. There are two types of bonders: 1) silicate series, i.e. water glass with different modulus of (SiO2/Na2O). 2) Phosphate series, such as acidic aluminum phosphate and polyphosphate, etc.

Aluminum silicate refractory mortar Physiochemical Index

Item	Clay mortar	High alumina mortar	Mullite mortar	Corundum mortar
Refractoriness℃ ≥	1750	1790	1790	1850
Rupture strength (Sintered) MPa ≥	5.9 （1200℃）	5.9 （1400℃）	5.9 （1500℃）	5.9 （1500℃）
cementation time/ min	1-2	1-2	1-2	1-2
Granularity ≥0.5mm %	≤1	≤1	≤1	≤1
Al2O3 % ≥	45	70	70	90
rupture under load temperature ℃ ≥	1200	1300	1500	1700

Basic refractory mortar

Basic refractory mortar is the joint material used to mason alkaline refractory products, including magnesia mortar, magnesia alumina mortar, magnesia chrome mortar, magnesia silica mortar and so on. As MgO will react with water, so alkaline refractory mortar should be bonded by liquid binder which can react with MgO and form composite salt, or non-hydrous organic binders.

Silicon carbide and carbon refractory mortar

Silicon carbide refractory mortar is joints material used to line silicon carbide products or SiC containing products. Carbon refractory mortar or carbon containing refractory mortar is used to mason large blast furnace and middle blast furnace carbon bricks, iron mixing furnace or torpedo tank alumina carbon brick. Carbon mortar is further divided into bulky joint carbon mortar and thin joint carbon mortar.

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Jun 29, 2021

Acid Resistant Mortar

Acid Resistant Mortar Description

Acid Resistant Mortar is made with over42.5 grade ordinary Portland cement, sand and powder made of compact sand, quartzite and igneous rock, and adding suitable sodium silicate and sodium fluosilicate. Acid Resistant Mortar is mainly used as lining material, acid floor and acid protective layer. Acid Resistant Mortar is a kind of special anticorrosive material with advantage of simple operation, good acid resistance, great impervious and hydrolytic resistance and low cost for kilns and furnace application.

Acid Resistant Mortar Features

High temperature resistance
High resistance to acid erosion
High waterproof and heat insulation
High bonding strength
High mechanical strength

Application of Acid Resistant Mortar

Refractory mortar is mainly used for coke oven, glass kiln, blast furnace hot blast stove and other industry kiln stove as protection layer for furnace lining through painting or gunning.
Refractory mortar can be used in industries of metallurgy, building materials, machinery, petrochemical engineering, glass, boiler, electric power, steel & iron, cement and etc.

Characters of Acid Resistant Mortar

Proportion: 2.66
Fineness: Residue on sieve for 900 holes per square centimeter is not greater than 1%. Residue on sieve for 4900 holes per square centimeter is not greater than 15%.
Setting time: Initial set is not earlier than 30 minutes. Final set is not later than 8 hours.
Acid stability: There is not crack, delaminating and damage after boiling for 1 hour in air and 40% sulfuric acid.
Acid resistance: More than 97%.
Tensile strength: specimen is conserved for 28 days in air. Its tensile strength is greater than 3Mpa. After boiling for 1 hour in 40% sulfuric acid, its intensity will not reduce.
Compressive strength: specimen is conserved for 28 days in air. Its compressive strength is greater than 30Mpa.
Kerosene absorption rate: Less than 13%.

The mortar can be used in chemical, petroleum, metallurgy, machinery, paper making, textile, pharmaceutical, chemical fertilizers and other industrial equipment and also can be made acid-proof daub, acid-proof mortar, acid concrete, acid-proof brick and acid plate lining to prevent from erosion of sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, acetic acid, chlorine, sulfur, nitrogen dioxide, oxygen and sulfur dioxide according to the actual need. The higher acid concentration and the better corrosion resistance, acid proof mortar has excellent stability.

Rongsheng is a professional kiln refractory materials manufacturer. Contact us for more information about cheap acid resistance products.

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Jun 29, 2021

High Alumina Ramming Mass

The raw materials of high alumina ramming mass are premium bauxite clinker aggregate and fines, white corundum(tabular corundum, brown corundum) aggregate and fines, calcium aluminate cement binder or phosphate binder, additives and so on. To improve high temperature performance of high alumina ramming mass, phosphate binder or silica micro powder can be used to replace calcium aluminate cement to produce low cement high alumina ramming mass or ultra low cement high alumina ramming mass. The granularity distribution of raw materials is: max. granularity is 10~15mm, the ratio of aggregates and fines is (60~65)/(35~40), the ratio of coarse aggregates and fine aggregates is(60~70)/(30~40).

High alumina ramming mass physiochemical indexes

Item		High alumina ramming mass
Item		GLDD-1	GLDD-2
Al2O3，≥		75	80
SiO2，≥		20	15
Max. working temperature ℃ ≥		1550	1650
Bulk density g/cm3 ≥		2.6	2.65
Cold modulus of rupture Mpa	110℃*24h	≥8	≥10
Cold modulus of rupture Mpa	1100℃*3h	≥8	≥10
Cold crushing strength Mpa	110℃*24h	≥80	≥100
Cold crushing strength Mpa	1100℃*3h	≥80	≥100
Reheating linear change rate %	110℃*24h	±0.5	±0.5

The application of high alumina ramming mass

High alumina ramming mass are widely used in monolithic working lining of steel ladle, induction furnace, electric furnace tapping spout, and the lining of high temperature vessels which contact with high temperature metal liquid or molten slag.
RS Group also supply all kinds of unshaped refractory, such as refractory castable, ramming mass, gunning mix, coating mix, etc.. Our newly built automatic unshaped refractory production line greatly increase our production capacity. That is to say, RS Group can offer customers good quality products with favorable price and short process period.

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Jun 29, 2021

Magnesia Refractory Ramming Mass

Magnesia Refractory Ramming Mass Features

Magnesia refractory ramming mass have high temperature volume stability.
Magnesia ramming refractory mass have resistant to erosion and wear.
Magnesia ramming refractory mass have good thermal shock resistance.
Magnesia refractory ramming mass have high load softening temperature.

Magnesia Refractory Ramming Mass Specification

Item		M-95	DM-90
Al2o3(%)		95	90
Cr2o3(%)		2.0	2.0
Bulk Density(g/cm3)	220℃*3h	2.50	2.40
Compressive Strength(Mpa)	220℃*3h	10	8
Compressive Strength(Mpa)	1500℃*3h	20	20

Magnesia Refractory Ramming Mass Application
1. Magnesia ramming mass refractory can be used as a new furnace lining or as a lining repairing material, such as flat furnace bottom repair, converter lining repair, or steel mouth filling material.
2. Refractory magnesia ramming mass product is mainly used for electric furnace bottom filling, converter repairing material, refractory ramming mass can be used as filler around the tapping port.
3. Magnesium refractory ramming mass tundish is made of magnesium ramming material, refractory ramming mass is used for the working layer of the tundish. The service life after the whole pouring can be about 35 hours, magnesium refractory ramming mass is generally suitable for large tundish.

Magnesia Refractory Ramming Mass Manufacturing Process
Firstly, the high-purity magnesia and magnesium powder are calcined three times, so that the magnesia and magnesium powder are fully expanded and shrunk, and then the proportion of the magnesia particles is proportioned according to the formula, and then the binder, anti-cracking agent, stabilizer, stirring are added. Made into a dry magnesia ramming mass refractory.

Magnesia Refractory Ramming Mass Contruction Method
1.Magnesium refractory ramming mass add about 5% of the brine solution with a concentration of 35% before use, stir into a semi-dry mud, and dry or beat it manually or mechanically.
2.Magnesium ramming refractory mass are widely used as fillers for special parts such as electric furnaces, open hearth furnaces, converters, iron alloy refining furnaces, and steel taps. Magnesia ramming refractory mass is required to have good overall stability under the action of frequently changing temperature. Magnesium ramming material made of magnesia and hexahydrate solution has good normal temperature and high temperature performance.

Magnesia Refractory Ramming Mass Characteristics for Tundish
1.Refractory magnesia ramming mass have anti-steel water wash, anti-erosion.
2.Refractory magnesia ramming mass refractory have thermal shock performance is good.
3.Refractory magnesia ramming mass refractory have high temperature volume stability.
4.Magnesia ramming mass refractory have high temperature resistance, high load softening temperature.

Magnesia Refractory Ramming Mass Construction Process
1. First, ensure that the surface of the permanent lining is clean. Then install the impact board and the seat brick. The surrounding area is beaten with magnesium refractory ramming mass. Then the magnesium ramming material is poured into the bottom of the package and make the bottom thickness.
2. the tire mold is installed, the distance between the tire mold and the permanent lining is consistent, so that it reaches the thickness required for the working lining.
3.Pour the magnesium ramming refractory mass into the upper edge of the tire mold, and beat it with a rubber hammer, which is subject to the tamping.
4. Clean the scene, ignite the baking burner on the tire mold for small fire baking, baking temperature 180-270 ° C, time 2h or so, so that the magnesium ramming material hardens to obtain a certain strength, such as the temperature drop of the tire mold release to below 100 ° C
5. Check the lining of the working layer of the tundish and repair the furnace, if it is defective.

Magnesia Refractory Ramming Mass Using Precautions
1. Due to the special nature of magnesium refractory ramming mass, magnesia ramming refractory mass is forbidden to contact with water to prevent hydration.
2. Magnesia ramming mass refractory is forbidden to use magnesium ramming material ,which is agglomerated and of unqualified quality.
3. Determine the thickness of the lining of the working layer of the tundish according to the refractory ramming rass construction requirements.

Magnesia Refractory Ramming Mass Manufacturing Process
Firstly, the high-purity electrolytic magnesia and magnesium powder calcined three times. The purpose is to fully expand and shrink the electrolytic magnesia and magnesium powder. In expansion, contraction. The expansion and contraction rate is almost zero. Then the ratio of the particle size ratio is used. Add binders, anti-cracking agents, stabilizers, and other refractory materials. Stir into a dry mix.

Magnesia Refractory Ramming Mass Supplier in RS Refractory Bricks Factory
Rongsheng refractory castable factory has been engaged in refractory material industry for more than 20 years. Rongsheng refractory castable factory have a big technological team, there are more than 15 senior designers for the furnace & kiln. Refractory castable factory are good at different technological field, such as refractory bricks , refractory castable, lightweight insulation firebricks and prefabricated bricks according to client requirement.

Rongsheng refractory castable have rich refractory raw materials and 20 years experienced in the refractory bricks manufacturing. Rongsheng refractory ramming mass can provide specification and category as well as competitive price & high-grade quality refractory castable products.

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Jun 29, 2021

Graphite Electrodes

Technical Characteristics of Graphite Electrode

Name		Unit	Nominal Diameter
			UHP Ultra-High-Power		HP Superstrong		RP Conventional Power
			≤Φ400	≥Φ450	≤Φ400	≥Φ450	≤Φ300	≥Φ350
Resistivity	Electrode	ΜΩ · m	≤5.5		≤6.5		≤8.5
	Nipple		≤4.5		≤5.5		≤6.5
Flexural Strength	Electrode	MPa	≥11.0		≥10.5	≥9.8	≥8.5	≥7.0
	Nipple		≥20.0		≥16.0		≥15.0
Elastic Modulus	Electrode	GPa	≤14.0		≤12.0		≤9.3
	Nipple		≤18.0		≤16.0		≤14.0
Density	Electrode	g / cm3	≥1.66	≥1.67	≥1.62	1.6	≥1.53	≥1.52
	Nipple		≥1.75		≥1.73		≥1.69
Coefficient Of Thermal Expansion	Electrode	10-6 / ℃	≤1.5		≤2.4		≤2.9
	Nipple		≤1.4		≤2.2		≤2.8
ASH		%	≤0.3		≤0.3		≤0.5
Note: 1.Koeffitsient ash content and thermal expansion as the reference index, the coefficient of thermal expansion (100 ℃ ~ 600 ℃), Custom manufacturing.

graphite electrode 1

The Length & Diameter & Permissible Deviation of Graphite Electrode

Graphite Electrode Application

1.mainly used for electric arc furnace (EAF) steel production
2.for ore-thermal furnace; for the resistance furnace
3.for the production of profiled graphite products
4.for the production of shaped graphite products
5.Also can used For a resistor furnace
6.For the production of graphite shaped products

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Jun 29, 2021

Graphite Electrodes UHP

Rongsheng Kiln Refractory Company is a professional graphite electrode manufacturer in China. Our company always devoted into manufacturing high quality graphite electrodes for all customers that are demanded for their ease of use, long time service and options for wide ranging usages. Besides, our company also provide RP Graphite Electrodes, HP Graphite Electrode that you can choose from Rongsheng Group.

Application of Graphite Electrode UHP

Ultra-high-power graphite electrodes (EHSP-UHP) are manufactured for operation at currents with a density of more than 25A / cm2, and the graphite electrode UHP is mainly used for for ultra-high-power arc furnaces and powerful ladle furnaces.

uhp graphite electrode 4

(1) Used in Electric Arc Furnace
Electric furnace steelmaking mill is the largest user of graphite electrodes. Graphite electrodes used in steelmaking accounts for 70%-80% of the total graphite electrodes production. Graphite electrodes are used to conduct electric current into electric furnace, electric arcs generated between electrodes end and loaded materials can release large amount of heat for high temperature smelting.

(2) Used in Mine Electric Furnace
The ore electric furnace is mainly used for the production of industrial silicon and yellow phosphorus. It features in that the lower part of the conductive electrode is buried in the charge, electric arcs are generated in material layer, and the heat released in the charge is used for the smelting. Mine electric furnaces which require high electric current density need to use graphite electrodes. For example, about 100 kg of graphite electrode is consumed for every t of silicon yield, and about 40 kg of graphite electrode is consumed for each t of yellow phosphorus production.

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