Application of low thermal conductivity MgO-C bricks in ladle

Currently, inhibition of steel temperature droping has become a major issue for many steel plants.Therefore, in order to suppress temperature drop of molten steel, there has a test to study insulation problem of refractory lining in 185t ladle, by comparing three different measures.Do you need any fire bricks ?

Measure 1: Reducing the heat transfer effect of sidewall castables (30% reduction).
This method is by reducing coarse particles in castable,increasing porosity and other measures to reduce the thermal conductivity,to suppress heat dissipation.

Measure 2: Using insulation materials in the backlayer of wall castable.
This method is to use one layer insulating bricks with less than 1W?(m℃) thermal conductivity between ladle steel shell and wall castable,to inhibit heat dissipationheat.

Measure 3: Reducing the heat transfer of slag line MgO-C brick heat transfer (30% reduction).
This method is developed in recent years, to select lower thermal conductivity of MgO-C brick from the high thermal conductivity of MgO-C brick for slag line, to suppress heat dissipation.

After comparing, the results found that: only in reducing the thermal conductivity of slag line MgO-C brick,the effect of suppressing steel temperature dropping is significant, up to 2℃. Therer have many kinds of refractory products in our factory,such as fire brick ,refractory raw materials ,refractory nozzle .The durability is same or higher than ordinary ladle, less cracks, the residual condition after use is also very good.
article source:http://www.chinafirebrick.com/Company_News_83.html

Characteristics of mould fluxes

Mould fluxes is a kind of refractory material that is put on the molten steel level to be thermal insulation,anti oxidation and absorption of non-metallic inclusions in the process of continuous casting.

The basic function of mould fluxes: Protecting the mould steel liquid from the two oxidation of air； Having good spreadability and insulation performance, prevent molten steel solidification or crus; Well absorbing the floating non metallic inclusion;Controlling the speed and uniformity of heat transmission from billet to crystallizer to reduce the thermal stress; Having good lubrication function for billet.

The product of our company is designed and produced according to parameter of continuous caster and detailed production situation, which has good melting property and steady quality, and is suitable for different casting conditions. It can ensure the clean and smooth surface of casting block, and also can ensue that there is no shell and flux strip in mold, with even whip mark an without defect on he surface of casting block.There have many kinds of refractory products in our factory.Such as fire brick ,refractory raw materials ,refractory nozzle .When you want to know more kinds of refractory products ,welcome to view our website to know more.
The source :http://www.chinafirebrick.com/Company_News_82.html

The application of Induction furnace

Refers to the use of current frequency in 150-8000Hz range power supply induction furnace. Most commonly used frequency 150-2500Hz. with increase of the capacity of furnace, using the current frequency decreased. Native medium frequency induction furnace capacity from 50kg to 20t, current frequency corresponding to 2500-150Hz. medium frequency induction furnace.There have many kinds of refractory products in our factory ,such as fire brick ,refractory raw materials .

This vortex also has some properties of intermediate frequency electric current, i.e., free electrons of the metal itself in the resistance of the metal flow to generate heat. For example, a piece of metal cylinder is put in if alternating current induction coil, metal cylinder without induction coil and direct contact, through the temperature of the coil itself is very low, but cylinder surface is heated to redness, even melting and the redness and melting speed just have to adjust the size and frequency of current intensity can achieve. If the cylinder is placed in the center of the coil, so the temperature of the cylinder periphery is the same, cylinder, heating and melting also did not produce harmful gases, light pollution of the environment.?
Article source:http://www.chinafirebrick.com/Company_News_81.html

Lime shaft kiln furnace building process

1. The choice of kiln lining material?
(1) Insulation, furnace shell and the permanent layer refractory insulation layer can choose between aluminum silica refractory fiber felt layer on the inner wall of the furnace shell, then clay fire brick masonry. Heat preservation brick can be single or double layer adopted according to the thickness of the lining design.?

(2) The permanent layer and working layer: permanent layer typically USES clay brick masonry. Working layer is according to the size of the kiln, can use different materials such as clay, high aluminum, magnesium, aluminum, magnesium chrome brick, etc. We are in big volume of lime kiln adopts thermal stability good burn into basic brick, in a small volume of kiln, the use of the burning and not burn comprehensive basic brick masonry.?

2. Kiln lining building design?
The design of the kiln lining to the heat preservation performance is good, heat storage principle. Kiln wall thickness is 600 ~ 850 mm, small volume lower limit, big volume to take close to upper limit. Kiln wall thickness, heat preservation performance is poor, high heat loss, energy consumption is high. General lime kiln wall structure since the furnace shell, in turn, is 40 ~ 70 mm fiber felt, 115 ~ 265 mm light clay brick, fire brick for sale , 230 mm, 230 mm layer brick work.
Article source:http://www.chinafirebrick.com/Company_News_80.html

Why not to buy fire bricks from chinafirebrick ?

Changxing Refractory is a Chinese leading refractory and oil fracturing proppant manufacturer & supplier with a wide range industries in high temperature field . From a refractory bricks manufacturing factory, Changxing has become a professional manufacturer with various refractory materials and fire brick both in domestic and international market during 30+ years, whose customers covers North America, Middle East, Asia, Africa, etc.
1. Reduction in physical properties – Improper water content leads to a reduction in the physical properties associated with a monolithic refractory material. This can decrease the lifespan of the refractories as well as create issues for the end user throughout the time period in which they are in use. In many cases, end users select more costly refractories in order to acquire higher quality materials. The improper addition of water can completely negate this additional spend. In many cases leading to performance, that is inferior to properly mixed lower quality materials.
2. Increased set-up time – Materials in which too much water has been added will not set-up at the rate which they were designed to. In some cases, they may not set-up at all and may remain soft, spongey, or grainy. This may lead to the need to remove and re-cast the materials causing long and expensive delays. Furthermore, the rate at which monolithic refractories cure has an impact on the physical properties achieved. Accelerating and decelerating this reaction can have negative implications.
There are ways to insure that materials are properly mixed. These methods include adequate training of the workforce, proper communication, have the mixing and use instructions available during an installation, have proper measuring devices available, and the use of mixing logs and even third party inspectors.Changxing has a production line, which is base on oil & gas applied ceramic proppant, and also with 3 factories focusing on all kinds of refractory materials used for iron & steel casting, cement,fire bricks glass petrochemical and ceramics industries. With abundant sources and professional techniques, Changxing Refractory would like to build a reliable and efficient platform for customers all over the world.

Welcome to know more about Ceramic Fiber Blanket and Refractory Fiber Assembled Block

There have many kinds of refractory products in our factory.Would u like to know some of them ?There have ceramic fiber blanket and refractory fiber assembled block.Come to know more about them.
Refractory Fiber Assembled Block Advantages:
The construction is convenient, high strength, low thermal conductivity, good thermal insulation effect.
Refractory Fiber Assembled Block Application:
Metallurgy, machinery, building materials, electronics, petroleum, chemical, shipbuilding and other insulation parts
Ceramic Fiber Blanket Introduction:
which can be widely used for industry kilns, and has good saving power effect. According to content, we develope four diferent kinds of pruducts, they are 1000 °C common aluminum silicate, 1200 °C high purity, 1200 °C high alumia and 1300 °C Zirconia bearing alumina silicate, and it also can be made according to your requirements.
Ceramic Fiber Blanket Advantages:
1. Profession manufacture
2. Low price and high quality
3. prompt reply-within 24hours
4. prompt delivery-within 15 days

Ceramic Fiber Blanket Application:

1. Metallurgy Industry: heating furnaces,heat treatment furnaces and ladle insulated cover
2. Mechanism industry: thermal insulation material for electric power boilers, gas turbine engine and nuclear power plant
3. Petrochemical industry: the lining of high-temperature reaction equipment and heating equipment in chemical fields,like converting furnaces, constant/reduced pressure furnaces, cracking furnaces, flue lining.
4. Electroceramics: roller kilns,tunnel kilns ,shuttle kilns and other kinds of furnaces
More details:http://www.chinafirebrick.com/79*Ceramic-Fiber-Blanket.html

Introduction of calcium silicate insulation products

Based on silicon oxide (quartz powder, diatomaceous earth etc.), calcium oxide (also use slaked lime, carbide slag etc.) and reinforcing fibers (such as asbestos, glass fibers etc.), through mixing, heating, molding, autoclave curing, drying and other processes, calcium silicate insulation material is made to be a new type of insulation material.

There has four kinds different types:

1. Asbestos calcium silicate: Its reinforced fiber is asbestos fiber.?
2. Non-asbestos calcium silicate: Its main performances are good thermal conductivity, high mechanical strength and linear shrinkage etc., better than asbestos calcium silicate. It is good to reduce the loss of construction and installation.?
3. Lightweight calcium silicate: Its thermal conductivity, flexural strength and other properties are better than asbestos calcium silicate, in particular for 50% light density, available temperature also increase from 650 ℃ to 1000 ℃.?
4. High-strength calcium silicate: It is made by hydration reaction between siliceous material and calcareous material, Tuobei Mullite stone as the main crystalline material. With adding adhesive and reinforcing material, its strength will be improved.
The source:http://www.chinafirebrick.com/Company_News_79.html