Reasons for steel leakage between ladle slide gate and preventive measures

 The sealing protection of the ladle sliding nozzle is mainly at the connection between the upper nozzle and the upper slide, and the lower slide and the lower nozzle. In the pouring process, generally after pouring one or two furnaces of molten steel, the lower slide plate and the nozzle must be replaced and reassembled. The sealing protection adopts fibrous or mortar gaskets to ensure the high cleanliness of the molten steel and the uniformity of the internal quality of the casting slab.

Hydraulic transmission of sliding nozzle: Large and medium-sized ladle generally use hydraulic transmission to solve the problem of opening and closing of sliding nozzle. Hydraulic transmission is driven by liquid (common oil) as the working medium. Because the liquid has almost incompressible characteristics, when the liquid is filled with a closed container (consisting of oil pumps, pipes, valves, cylinders, etc.), the liquid is pressurized by the oil pump, and it can lose this pressure through pipes, valves, etc. It is transmitted to the oil cylinder very small, causing the oil cylinder to move and realizing hydraulic operation.

Reasons for steel leakage between ladle slide gate and preventive measures ：

(1)The reason for the leakage of the gap between the drain and the lower sliding plate: the sliding plate is not baked after pre-installation; the cement is not evenly coated during installation, resulting in gaps; there are bricks in the cement to make the contact loose.
Preventive measures: The fire mud must be clean during installation, the joints must be evenly seamed, and can only be used after baking and drying.

(2)The reason for the leakage of the upper and lower slide plates: the sliding surface is not flat; the upper and lower slide plates are cracked at the edge of the injection hole; the adjustment operation is not tight or the front and back are uneven.
Preventive measures: pay attention to choosing flat skateboards. Do not use skateboards without steel hoops to prevent cracking at the edge of the injection hole; adjustment operations should be tight and even before and after.

(3) The reason for the leakage of the gap between the upper nozzle?and the upper sliding plate: the upper sliding plate and the upper sliding plate are not evenly coated with mud; the mass in the fire mud causes the male and female mouths to be insufficiently deep and disconnected; the gap is too large.
Preventive measures: the fire mud should be clean, and the joints should be evenly cracked.

Article Source:Reasons for steel leakage between ladle slide gate and preventive measures
Company name: Henan Changxing Refractory Materials Co.,Ltd
Email: info@cxrefractories.com
Website:http://www.cxrefractories.com/

Sliding gate damage theory and meaning of conjunction

Ladle slide gate plate mainly contains two types, alumina carbon and alumina zirconium carbon. With steel production increasing and steel quality improving, calcium treatment process is applied, therefore, calcium content in the melton steel increased. Using alumina carbon and alumina zirconium carbon slide gate plate when casting steel, SiO2 and Al2O3 in the slide gate plate would mixed with [Ca], [CaO] in the melton steel or slag and get into low-melting point materials and feldspar, which would cause damage of slide gate plate. This type low-melting point materials would be easy to crushed down by erosion, new low-melting point material would re-appear. This progress would cause the erosion heavier, in which way the slide gate plate would be damaged gradually.

Conjunction of slide gate plate can reduce the number of turnover ladle, low down ladle serves and turnover pressure. In addition, slide gate plate conjunction can low down labor working, improve ladle lining temperature, thus low down casting temperature and bring a number of benefit for production and reducing cost.
From Year 2008, our factory succeed to develop double conjunction and from Year 2010, triple conjunction is developed. With the triple slide got into the normal production, on-site production, reduce labor intensity, the effect of reducing the cost of generation is very obvious.

Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.

Article Source:Sliding gate damage theory and meaning of conjunction
Company name:Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

Reasons of ladle slide plate crack

Firstly, when the molten steel flows through the casting hole, the temperature suddenly rises, and radioactive thermal vibration cracks are generated around the casting hole.

Secondly, the cast hole is first subjected to thermal shock and expansion. The change in position is slightly smaller. When the thermal conductivity is small and the temperature gradient is large, a large thermal stress is generated at a certain distance from the casting hole of the sliding plate to cause cracks.
Thirdly, ladle slide plate is a non-homogeneous material, especially a composite ladle slide plate. It is easy to cause cracks due to different expansion coefficients.

At last, mechanical constraints. The slide is heated by the heat, if there is no gap or gap between the two ends of the sliding box and the slide, it will be restricted by the side wall of the sliding box when the board expands. And the sliding plate is a brittle material, and excess crushing strength leads to crack.

Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.

Article Source: ladle slide plate
Company name:Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

Influence of Refractory Materials for Ladle Leaking

Slide gate refractory part is a central part of the slide gate, is a key component in direct contact with the control of molten steel, its physical and chemical properties is a key factor in determining whether the normal use of the sliding gate.
1.Ladle well block is of low hot crushing strength. When using air pick to chance upper nozzle well block, the well block would be easy to breakdown. The inner diameter would get larger, and gap between well block and upper nozzle may get bigger. The molten steel would easy to get into the gaps, and leak would easy to happen.
2.Ladle well block is of weak thermal resistance. During working period, like casting and hot repair, the temperature difference would be very big, and the well block would easy to break down. If can not be found in time, molten steel would leak through the gap between upper nozzles well block and nozzle.
3.Ladle sliding gate plate is of weak erosion resistance. When doing half hole casting, the lower plate would bear higher erosion strength, and easy to appear groove. After closed the plate, molten steel would leave in the groove and get cold there, in which way the two plates can not work smoothly.
4.If the low sliding gate plate break down, gap would easy to appear when casting, and molten steel would leave through it. If terrible, the sliding gate plate would easy to break into pieces because of molten steel pressure.

5.Sliding gate plate mortar can not bear erosion well, in which way gaps would appear and cause leak. If can not be found in time, this would cause leak between upper nozzle well block and well block, upper nozzle and upper sliding gate plate.
Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.
Article Source：Influence of refractory materials for ladle leaking
Company name:Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

Sliding gate damage theory and meaning of conjunction

Ladle slide gate plate mainly contains two types, alumina carbon and alumina zirconium carbon. With steel production increasing and steel quality improving, calcium treatment process is applied, therefore, calcium content in the melton steel increased. Using alumina carbon and alumina zirconium carbon slide gate plate when casting steel, SiO2 and Al2O3 in the slide gate plate would mixed with Ca, CaO in the melton steel or slag and get into low-melting point materials and feldspar, which would cause damage of slide gate plates. This type low-melting point materials would be easy to crushed down by erosion, new low-melting point material would re-appear. This progress would cause the erosion heavier, in which way the ladle slide gate plate would be damaged gradually.

Conjunction of slide gate plate can reduce the number of turnover ladle,?low down?ladle serves and turnover pressure.?In addition, ladle slide gate plate conjunction can low down labor working, improve ladle lining temperature, thus low down casting temperature and bring a number of benefit for production and reducing cost.

From Year 2008, our factory succeed to develop double conjunction and from Year 2010, triple conjunction is developed. With the triple slide got into the normal production, on-site production, reduce labor intensity, the effect of reducing the cost of generation is very obvious.

Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.

Article Source：Sliding gate damage theory and meaning of conjunction
Company name:Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

The importance of refractories for ladle

Sliding refractory is a central part of the slide gate, is a key component in direct contact with the control of molten steel, its physical and chemical properties is a key factor in determining whether the normal use of the sliding gate.

Ladle well block is of low hot crushing strength. When using air pick to chance upper nozzle well block, the well block would be easy to breakdown. The inner diameter would get larger, and gap between well block and upper nozzle may get bigger. The molten steel would easy to get into the gaps, and leak would easy to happen.?Ladle well block is of weak thermal resistance. During working period, like casting and hot repair, the temperature difference would be very big, and the well block would easy to break down. If can not be found in time, molten steel would leak through the gap between upper nozzle well block and nozzle.

Ladle slide plate plate is of weak erosion resistance. When doing half hole casting, the lower plate would bear higher erosion strength, and easy to appear groove. After closed the plate, molten steel would leave in the groove and get cold there, in which way the two plates can not work smoothly.

If the low slide gate plate break down, gap would easy to appear when casting, and molten steel would leave through it. If terrible, the slide gate plate would easy to break into pieces because of molten steel pressure.

Ladle sliding gate plate mortar can not bear erosion well, in which way gaps would appear and cause leak. If can not be found in time, this would cause leak between upper nozzle well block and well block, upper nozzle and upper sliding gate plate.
Article Source:The importance of refractories for ladle
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

Remarks for producing slide gate plate

1.Batching should be in strict accordance with weight ration, mixing should be even.
2.The temperature in edge runner-wet mill or intensive mixer must be controled to prevent it from going too high or too low, which could affect the mixture’s quality and moldability.
3.When moulding, the pressure should be small at the beginning and big at the end, exhaust should be done during to avoid slabbing. Check the bottom cover plate’s bending regularly to prevent deformation of slide gate plate.
4.Temperature-rising curve should be strictly complied with during heating, especially for the ones with zirconium. Be careful during temperature drop to prevent cracking.
5.Ensure planeness during grinding.
6.Slide gate plate should be handled with care during transportation and polishing, use wooden hammer instead of iron ones for fastening and banding.

Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.
Article Source:Remarks for producing slide gate plate
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

Cooperation with European client

On 10th, October 2017 our company delivery another 30 tons ladle slide gates to one of our European customers again.

Since last year in June, we have built a long term cooperation with European company. After trail order testing and service supporting, now we supply 60 tons refractory products to them every month.

First we design products according to their furnace and casting condition, then ask engineers to help them to install and test products. Now we are developing more and more European customers, and supply them both refractory products and service.

Article Source:  Cooperation with European client
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/