The hot repair process of EAF taphole

1.Choose the right timing. The first repair should be after 60-70 heats or when tapping time is no more than 2 minutes and 10 seconds, then repair after each 30-40 heats.

2.Incline the EAF after tapping, properly place the gunning sleeve in the taphole through sand filling hole.

3.Mount pallet on EBT handcart.

4.Mount nut cap on gunning sleeve.

5.Get the gunning mix ready on EBT platform.

6.Put the gunning head into sand filling hole to spry the gunning refractory material into the gap between gunning sleeve and taphole refractory bricks.

7.Close the gunning machine and pull out gunning head when the gunning material is in the same level with bottom material.

8.Dismount nut cap and pallet.

Article source:
The hot repair process of EAF taphole

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Semi-graphitic Carbon Block---Refractory Brick---Refractory Material---Changxing Refractory

Semi-graphitic Carbon Block

Introduction and Application:

Semi-graphitic Carbon Block is mad of high temperature' electrical calcined anthracite as main a material, medium temperate pitch as binder, through forming, high temperature baking, final precision machining. It features good thermal conductivity and alkaline resistance. It is economic and practical, and mainly applied for blast furnace bottom.

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High Alumina EPS insulating Firebrick---Refractory Brick---Refractory Material---Changxing Refractory

High Alumina EPS insulating Firebrick

Introduction:
This series of products are sintered mainly with supper-fine bauxite chamotte, and proper additive by a method of EPS ignition loss, Their main advantages include high intensity, low thermal conductivity, excellent thermal stability, very small reheat linear change, outstands erosion and corrosion resistance etc.

Advantages:
1. High strength
2. Optimum performance
3. Dimensional stability
4. Low thermal conductivity

Application:
They are an ideal kind of energy-conserning products which can be widely used as lining or insulating layers of various industrial furnaces and kilns in metallurgical industry, machine building industry, ceramic industry, chemical industry, etc. Recommended service temperature: Less than 1400C.
Clients can avail from us a wide variety of Fire Bricks, which is widely demanded for their high strength. The offered bricks are manufactured using high-grade material and advanced techniques, thus complying with the international industry standards. Our array of bricks is extensively used as lining in fireplaces, fireboxes, furnaces and kilns.

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Characteristics of lightweight mullite bricks

Lightweight mullite brick Features:
1. Low thermal conductivity, low heat capacity.
2. High purity, impurity content less.
3. High temperature, direct contact with the flame.
4. High strength, and has excellent thermal shock resistance. Applicable to metallurgy, petrochemical, building materials, ceramics, machinery and other industries of various industrial furnace hot surface lining and backing. Heat treatment furnace, resistance furnace, tunnel kiln, roller kiln, bell kiln, glass tank kiln and so on. The Refractory company products are widely used in many industries, such as: cracking furnace, reformer, heating device, refining device, regenerating device, hot air furnace.

Features:
Higher refractoriness, up to 1790 ℃ or more. The softening start temperature of the load is 1600 to 1700 ° C. Room temperature compressive strength of 70 ~ 260MPa. Thermal shock resistance is good. There are sintered mullite bricks and fused Mullite Insulating Firebrick. Sintered mullite brick to bauxite clinker as the main raw material, adding a small amount of clay or bauxite as binder, by molding, firing and made. Fused mullite refractory brick to high bauxite, industrial alumina and fireclay refractories as raw materials, by adding charcoal or coke fine particles as reducing agent, forming after the use of reduced melting method to manufacture. The fused mullite is more crystalline than the sintered mullite and has a better thermal shock resistance than the sintered product. Their high temperature properties depend mainly on the alumina content and the homogeneity of the mullite phase with the glass distribution.

Clay, High Alumina Insulating Bricks---Refractory Brick---Refractory Material---Changxing Refractory

Clay, High Alumina Insulating Bricks

Introduction, Advantages, Application:

Produced with unique advanced technology, the clay and high alumina heat insulating bricks possess the characteristics of high intensity for pressure and good thermal shock stability. The use of the bricks can reduce the heat capacity of kiln walls and promote the heat efficiency of kilns. The product is applicable for constructing industrial kilns and inner lining of kilns.

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Generality High Alumina Brick &Clay Brick---Refractory Brick---Refractory Material---Changxing Refractory

Generality High Alumina Brick &Clay Brick

It is used in lining furnace kilns, fireboxes and fireplaces. Its primary purpose is to withstand high temperature and also to retain the heat for greater energy efficiency. We offer wide range of low, medium & high alumina refractory firebricks.

Introduction:
Changxing Refractory's High Alumina Bricks and Fireclay range is available in different varieties/shapes as per the specifications given by the clients. We provide High Alumina Bricks that are highly resistant and durable without causing any environmental hazards maintaining High standards are made from a variety of raw materials having different properties. Shapes of the High Alumina Bricks are made as per the drawings and measurements provided by the clients and only high grade fireclay and raw materials are used in their manufacturing.

Advantages:
It is used in lining furnace kilns, fireboxes and fireplaces. Its primary purpose is to withstand high temperature and also to retain the heat for greater energy efficiency. We offer wide range of low, medium & high alumina refractory firebricks. High alumina brick have very good ability of anti-acidity, anti-metal fluid corrode and anti-oxidation.

Application:
High alumina brick have very good ability of anti-acidity, anti-metal fluid corrode and anti-oxidation.

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Anchor Brick for Heating Furnace---Refractory Brick---Refractory Material---Changxing Refractory

Anchor Brick for Heating Furnace

The qualified of anchor brick is similar to the material of furnace lining castables and formed by preeing and being fired at high temperature. Characterized by good thermal shock resistance and high strength, it is used for several heating furnace and has good effect.

Introduction, Advantages, Application:

The qualified of anchor brick is similar to the material of furnace lining castables and formed by preeing and being fired at high temperature. Characterized by good thermal shock resistance and high strength, it is used for several heating furnace and has good effect.

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Bottom Frame &Skid Platform Brick for Heating Furnace---Refractory Brick---Refractory Material---Changxing Refractory

Bottom Frame &Skid Platform Brick for Heating Furnace

Introduction, Advantages, Application:

Skid and platform brick are with brown corundum and high grade bauxite as raw materials, using low cement technology and additive. Casting moulding and baking at low temperature, or casting on-site are both available. Characterized by high strength, water and corrosion resistance, they are used for isothermal bed and furnace doorframe of continuous heating furnace and have good effect.

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Tundish Well Block---Refractory Brick---Refractory Material---Changxing Refractory

Tundish Well Block

Introduction:
Changxing Refractory supplies refractory nozzles in a number of different compositions to best suit the operating conditions of steel ladle. Nozzles are available in alumina qualities (with and without carbon additions, zirconia additions, and/or chrome additions) to best resist the slag chemistry. Nozzles are either pressed or pre-cast depending on the composition.

Advantages:
1. These shapes can be pre-fired if necessary to ensure optimum performance.
2. These pieces are custom designed for a specific ladle with attention to total life, free open performance and cost.

Application:
1. Suitable for well block of tundish nozzle under different process conditions
2. Can be assort with billet nozzle. changer, common metering nozzle stopper for slab and slide plate

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Ladle Permeable Well Block---Refractory Brick---Refractory Material---Changxing Refractory

Ladle Permeable Well Block

Introduction:
Made from high-purity, high-density, high-strength materials and MAS matrix-optimized system, shaped by pressing, prefabrication and vibration. With subtle formula design, unique technical process, they have, which identified up to the leading domestic level and received recognition and praise.

Advantages:
1. Good corrosion/erosion resistance 2. High temperature performance 3. Longer service life 4. Stable structure 5. Thermal shock resistance

Application:
They suit specially for large-sized refining ladles

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Ladle Permeable Brick---Refractory Brick---Refractory Material---Changxing Refractory

Ladle Permeable Brick

Ladle permeable is also called ladle purge plug or brick. Adopting tabular alumina, emery, chromium oxide green and magnesia alumina spinel as main raw materials, using cement as binder. 

Ladle purge plug is used for ladle bottom blowing.

Introduction:
Ladle permeable is also called ladle purge plug or brick. Adopting tabular alumina, emery, chromium oxide green and magnesia alumina spinel as main raw materials,using cement as binder. Numerous designs are available based around high purity refractory materials. They can be designed and produced types of straight hole, directional slit, directional labyrinth, girth shape and interior and exterior integral split etc according to users requirement. With precisely formed slot/channel for the optimum gas flow rates and stirring efficiency

Advantages:
1. Stable structure 2. Consistent quality 3. Strong corrosion resistance 4. Long service life 5. High air permeability 6. Reliable gas flow performance

Application:
Ladle purge plug is used for ladle bottom blowing.

Content source:
http://www.yilongrefractory.com/AllProductOneServlet?id1=1&id=7
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Ladle Nozzle Well Block---Refractory Brick---Refractory Material---Changxing Refractory

Ladle Nozzle Well Block

The series of well blocks for nozzles are made from high-purity, high-density, high-strength materials. Based on different materials, they have corundum, magnesia carbon and alumina spinel carbon.

It is mainly used to fix upper nozzle in steelmaking.

Introduction:
The series of well blocks for nozzles are made from high-purity, high-density, high-strength materials. Based on different materials, they have corundum, magnesia carbon and alumina spinel carbon.

Advantages:
They show the features of stable structure, excellent thermal shock resistance, good corrosion/erosion resistance and long service life.

Application:
It is mainly used to fix upper nozzle in steelmaking.

Content source:
http://www.yilongrefractory.com/AllProductOneServlet?id1=1&id=6
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Low Carbon Brick and Carbon-free Brick---Refractory Brick---Refractory Material---Changxing Refractory

Low Carbon Brick and Carbon-free Brick

Low carbon magnesia carbon brick are used for ladle slag line. Low carbon and carbon-free corundum spinel bricks are used for ladle lining and bottom.It can realize ladle low carbon and carbon-free to meet the needs of high grade and ultra-clean steel. 

Introduction,Advantages and Application:

Low carbon magnesia carbon brick using with crystal magnesite, fused corundum, fused spinel, high purity and ultrafine graphite and nano composite antioxidant as raw materials, which are used for ladle slag line. Low carbon and carbon-free corundum spinel bricks are used for ladle lining and bottom. It can realize ladle low carbon and carbon-free to meet the needs of high grade and ultra-clean steel. The products are characterized by corrosion resistance, penetration resistance, erosion resistance, spalling resistance and good integrity, to meet the need of complete refining ladle. It is the leading level in the domestic.

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Ladle Magnesia Carbon Brick---Refractory Brick---Refractory Material---Changxing Refractory

Ladle Magnesia Carbon Brick

Introduction:
Magnesia Alumina Carbon Brick is formulated for ladle linings and is manufactured with very high purity electro fused Magnesia, high purity Graphite, Alumina and Antioxidants

Advantages:
High purity Alumina and Magnesia thermal shock properties. It has the performance between magnesia carbon brick and alumina magnesia carbon brick

Application:
They are used in Ladle linings, ladle upper and lower slag line, ladle wall and ladle bottom

Content source:
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Refractory brick - --clay brick---Basic information

Properties of clay brick:
Clay brick is a weak acid refractory products, resistant to acidic slag and acid gas erosion, resistance to alkaline substances somewhat less. Clay refractory brick thermal performance is good, resistant to hot and cold.


The use of clay brick:
Clay, High Alumina Insulating Bricks is mainly used for clay brick building, blast furnace, hot stove, iron furnace, open hearth furnace and electric furnace and other low temperature part of the use of fireclay refractories. Bricks, bricks for casting systems, heating furnaces, heat treatment furnaces, combustion chambers, flues and chimneys. Clay bricks are especially suitable for large temperature changes.

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Selection Principle and General Method of Refractory for Furnace

The main performance of the furnace is mainly determined by the technical and economic performance of the refractory insulation material, which directly affects the investment cost, working performance, thermal efficiency and running energy consumption of the kiln. Select the general principles of fire-resistant insulation materials:
1, the performance of the kiln and thermal characteristics, such as the gap between the work of the kiln should use low heat capacity of the material;
2, the safe use of materials temperature, thermal conductivity system, high temperature strength, chemical stability;
3, the use of life;
4, investment costs and operating maintenance costs.

In general, heavy refractory material is more focused on a technical performance indicators, such as high temperature stability, chemical stability; light weight insulation materials pay more attention to investment and operation of the integrated technical and economic indicators.

When using lightweight insulation materials, the general thermal insulation material thermal conductivity (λ) and the cost per unit volume of insulation material (P) to determine, "λP" product value as small as possible. Thermal conductivity value is small, indicating the insulation effect of insulation materials, running the energy costs low. Low cost per unit volume of insulation material that investment costs are low, with good investment in economic results. Can be plotted with coordinate mapping choice, the abscissa for the operating temperature, the vertical coordinate (λP) good product, with the safe use of materials, intercept the temperature curve of the material, Select the technical and economic performance of the material.

Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.

How to Choose Refractory Brick Molding Equipment

Refractory plant Refractory company plant new shape, you must buy the press. If such enterprises for small and medium-sized manufacturing plant, according to the current and future production of products may choose the right tonnage friction press. Because of the low price of friction press, operation and maintenance is simple, more suitable for small and medium enterprises.
Expansion or technological transformation of enterprises, according to need to purchase some brick press. For large and medium-sized refractory material production enterprises, if you need to produce high-grade products or high-performance products, according to the specific product selection of suitable molding equipment. Such as the production of functional refractories dry vibration mix and other special products, such as optional hydrostatic forming device; such as the production of high-grade lining brick, can choose more advanced hydraulic press machine or a vacuum function of the press, can also use large tonnage Friction press brick.
Older machine update is relatively simple, according to the original models and have advanced to buy the more advanced press or other molding equipment.
The purchase of molding equipment and purchase other equipment, is to consider a number of factors to decide, and not ladle gunning mix above the situation can be summarized. For small and medium enterprises, the production plant can refer to other molding equipment to choose, in addition, the purchase of molding equipment, technical parameters should be surplus, there should be a certain sense of advance to meet the continuous development of technology and production needs.
Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, tundish coating, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.

Selection and Evaluation of Refractory

Selection and Evaluation of Refractory
    Before the rotary kiln operating cycle is mainly refractory material operating cycle impact is relatively large, but many companies blind pursuit of high-grade refractories, resulting in tons of clinker refractory consumption is not high, but the expense of high.
   Simple analysis, the kiln refractory Ladle Permeable Brick should pay attention to refractory bricks and kiln castable selection. In fact, after 14 years of production experience found that kiln castables as long as the two key indicators can be more than 1,600 degree refractoriness can be another indicator is the requirements of wear-resistant kiln refractory brick for sale more simple, The use of magnesia-chrome brick can be, behind the bold use of silicon Mo brick
    Preheater castable and alkali-resistant bricks must be careful not to over-high-grade can be grate cooler high-temperature zone and low wall wear-resistant castable with high temperature can be.

Refractory company Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory materials,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.

Taphole Brick---Refractory Brick---Henan Xinmi Changxing Refractory Material Co., Ltd.

Taphole Brick---Refractory Brick---Henan Xinmi Changxing Refractory Material Co., Ltd.

Taphole brick is molded at isostatic pressure, with fused magnesia and graphite as raw material. It is characterized by good oxidation resistance, high strength, good corrosion resistance, good integrity, easy replacing and long life and it is ideal material taphole of large and medium furnace.

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Fused Cast AZS Block and Glass Defects

Fused cast AZS block exudation is thought as the leading cause of knot and cord defects. Fused cast AZS exudation is only a short-term source of glass defects. Fused cast AZS corrosion is a more potent and long-term source of defects. Glass melt contact refractory corrosion castable refractory material can lessen with time due to boundary layer formation and the effect of external cooling at the metal line.
The interaction of glass melts and refractories in glass furnaces has a large impact on the resulting glass quality. The mostly applied type of refractory in the glass industry, in direct contact with the glass melt, is fused cast AZS. Due to the interaction of the glass melt clay insulating bricks with fused cast AZS, glass defects like stones, knots and bubbles can be generated.
Fused cast AZS block has no open porosity but there are some closed voids and pores which arise from the manufacturing process. These pores are filled with gases. The gases in these pores refractory fiber board have an air like composition, with nitrogen and oxygen as main components and some carbon dioxide. When fused cast AZS is in contact with glass, it reacts with the glass melt and slowly dissolves in this melt. The closed pores will be opened and then release their gas content, forming bubbles.
Impurities, which can oxidize, are for example elemental carbon originating from graphite electrodes of the fused casting operation, sulfur or zirconium carbide originating from raw materials of the AZS. The dissociation/oxidation of nitrides/oxynitrides, produced by reactions with the graphite electrodes during melting of the AZS, could give nitrogen insulating castable gas.
The generation of a knot is due to one or more forces, which drive the fused cast AZS glass phase towards the refractory surface and into the bulk of the glass melt. Those forces can be caused by gravity, thermal expansion of zirconia and gas formation.
Glass defects are typically unavoidable, but their occurrence must be minimized during the production of high-quality glasses. Some alternatives, such as fused cast AZS with modified chemistry and glassy phase and alpha-beta fused cast alumina block are used to replace fused cast AZS to reduce the glass defects and improve the glass quality.

When fused cast AZS block is brought into contact with a glass melt, an electrical potential is generated between the refractory and the glass melt because generally no thermodynamic equilibrium exists between these materials. The electromotive force (emf) generated between glass melt and refractory interior can cause the formation of oxygen bubbles.


Henan Xinmi Changxing Refractory Material Co., Ltd. Located in Henan Province,China.ChangXing's product portfolio covers shaped products such as refractory material,refractory brick, refractory castable,refractory nozzle, ceramic fiber, slide gate, etc; unshaped products including repair, construction and casting mixes and mortars.exported to more than 20 countries, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq and so on.