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refractory

refractory

تبادل لینک

سایت های تبادل لینک رایگان اتوماتیک سه طرفه و هوشمند

با رنک و اتوریتی بسیار بالا مؤثر در افزایش بازدید و رتبه سایت ها و وبلاگ ها

بهترین سایت های تبادل لینک رایگان رنک بالا

آیا تبادل لینک آسان ترین و بهترین روش برای افزایش بازدید نیست ؟

افزایش بازدید و رتبه وبلاگدهی پیشنهاد می کنیم حتما لینک خودتان را در سایت های رنک بالای زیر ثبت کنید

با ثبت لینک خود در این دایرکتوری ها به هاست ارزان آسانی افزایش بازدید و رتبه خواهید داشت

و مهم تر از همه لذت خرید بک لینک ارزان با بازدید بالا را تجربه خواهید کرد

تبادل لینک , تبادل لینک اتوماتیک , تبادل لینک رایگان تلگرام , تبادل لینک با سایتهای پربازدید , تبادل لینک وبلاگ , تبادل لینک تلگرام , ثبت لینک سایت رایگان , ثبت لینک رایگان , آموزش تبادل لینک


برچسب‌ها: تبادل لینک , تبادل لینک اتوماتیک , تبادل لینک رایگان تلگرام , تبادل لینک با سایتهای پربازدید , تبادل لینک وبلاگ , تبادل لینک تلگرام , ثبت لینک سایت رایگان , ثبت لینک رایگان , آموزش تبادل لینک ,
+ نوشته شده در  جمعه 12 آذر 1395ساعت 19:32  توسط bartar  |  | تعداد بازدید : 34

درب ضد سرقت

درب های شرکت درسام از نوع درب ضد سرقت ترک
درب ضد سرقت ترک
درب ضد سرقت درسام به چندین نوع مختلف تقسیم بندی می شوند که این نوع تقسیم بندی بر اساس طراحی ظاهری درب های ضد سرقت می باشد. و اختلاف قیمت درب های ضد سرقتدرسام نیز بر همین اساس می باشد. به طور مثال در ضد سرقت سوپر برجسته درسام به دلیل مصرف زیاد متربال برای طراحی قاب های فوق برجسته قیمت بالاتری نسبت به انواع دیگر درب های ضد سرقت دارد. در بعضی از این موارد میزان برجستگی درهای ضد سرقت به ۱۰ سانتی متر می رسد. نوع رویه درب ضد سرقت بر دو نوع می باشد اولین نوع MDF با روکش PVC کره ای می باشد که دارای تنوع و رال رنگ بیشتر از ۳۰ نمونه می باشد. و نوع دیگر درب های ضد سرقت MDF با روکش چوب طبیعی راش و ملچ می باشد که رنگ های چوبی پلی استری برای این نوع روکش ها برای درب ضد سرقت مورد استفاده قرار می گیرد. نوع دیگر دسته بندی درب ضد سرقت بر اساس میزان امنیت درب ضد سرقت می باشد. استفاده از قفل های هفته و چهارده زبانه و استفاده از پیم های گاو صندقی با تعداد ۳ و ۵ و ۷ زبانه از دیگر مشخصه های درب های ضد سرقت درسام می باشد. از دیگر اکسسوری های درب های ضد سرقت نیز می توان از انواع مختلف درکوب و دستگیره و اضافه کردن شب بند به درب و همچنین وجود پاشنه و نیم پاشنه به درب اشاره کرد. چهارچوب درب ضد ترک نیز به دو نوع کشویی و ساده تقسیم می شوند که برای ساختمان هایی که لقار متفاوت دارند می توانیم از چهارچوب کشویی استفاده کنیم. عرض چهارچوب درب های ضد سرقت درسام ۱۸ سانتی متر می باشد که این عدد در کاخانجات ایرانی مرسوم می باشد. یک تیپ از در ضد سرقت ترک قابلیت نصب بر روی چهارچوب فلزی معمولی را دارد که برای کسانی که تمایل به نصب درب های ضد سرقت بدون تخریب چهارچوب را دارند و از تخریب چهارچوب فلزی ابا دارند. بر روی چهارچوب نیز روکوب و تاج می تواند مورد استفاده قرار گیرد که روکوب و تاج از جنس خود رویه درب های می باشد و MDF روکش PVC می باشد. نوع روکوب نیز به دو نوع روکوب کشویی و ساده پیچی تقسیم می شود که نوع کشویی اتار درب سلماسراحتی دارد. نصب درب های ضد سرقت نیز توسط جوشکاری بر روی فریم انتظار انجام می شود.

doorsam


برچسب‌ها: درب ضد سرقت , درب های ضد سرقت , در ضد سرقت , درهای ضد سرقت , درب ضد سرقت ترک , در ضد سرقت ترک , آتار درب سلماس ,
+ نوشته شده در  دوشنبه 14 تير 1395ساعت 13:01  توسط bartar  |  | تعداد بازدید : 22

refractory,sunriserefractory

+ نوشته شده در  دوشنبه 23 آذر 1394ساعت 12:12  توسط bartar  |  | تعداد بازدید : 99

Wahl promotes excellence through quality by


  • - Meeting or exceeding the expectations of our customers, both internal and external.
  • - Providing all employees with the proper training, equipment, materials and a safe environment to produce a quality product and to supply a quality service.
  • - Involving all employees in continuous improvements through the Total Quality System.
  • - Seeking out quality oriented suppliers and customers and developing partnerships for the future.

The mission of Wahl Refractory Solutions is to provide our customers with superior products custom engineered for your demanding applications.



برچسب‌ها: Wahl promotes excellence through quality by ,
+ نوشته شده در  دوشنبه 23 آذر 1394ساعت 12:10  توسط bartar  |  | تعداد بازدید : 99

Vui lòng gọi


hay còn gọi là

- Kiểu may : miệng bao ống nạp đáy xả (ống xả đáy), miệng ống nạp đáy đóng (đáy phẳng)

- Sử dụng chủng loại , phù hợp với các sản phẩm vật liệu đựng trong bao bì là ở bột, dạng hạt, dung dịch….. với công nghệ dây chuyền đóng tự động, vật liệu được đóng vào bao bì thông qua ống nạp.

- Định lượng của sợi chỉ dệt từ 120gsm – 240gsm, tùy theo từng yêu cầu cụ thể, ta có thể tráng bóng thêm lớp PE.

- Nắp có gắn thêm ống nạp là dạng nắp có gắn ống nạp tròn phi 40-60cm, chiều dài ống nạp 60cm. Các vật liệu khi đóng vào bao bì phải đóng chảy qua ống nạp và ống nạp này được gắn tiếp giáp với "Phễu" đóng hàng. Phải hàn một khung để đóng hàng.

- Tính năng nổi bật của bao Jumbo:
Linh hoạt, độ bền cao, tải lực lớn
Thiết kế chống nước, bụi, bảo vệ tốt sản phẩm bên trong
Bao dệt trên mặt phẳng và chống trượt.

- Vina Tân Á dùng cho xuất khẩu: bao bigbag, bao Jumbo, bao container, dệt khổ lớn, nhiều chủng loại, nhiều kích cỡ.

- Đặc biệt với dây chuyền sản xuất bao bì PP dệt, bao Jumbo đủ để đáp ứng cho những đơn hàng lớn trong nước và xuất khẩu, chúng tôi còn cung cấp cho tất cả các khổ với giá cả cạnh tranh và chất lượng tuyệt đối.

برچسب‌ها: Vui lòng gọi ,
+ نوشته شده در  جمعه 20 آذر 1394ساعت 20:08  توسط bartar  |  | تعداد بازدید : 102

Mark Zuckerberg

More than 1 billion people now use Facebook each day, on average, viewing videos more than 8 billion times daily. A shift to mobile advertising has driven up the social network's revenues. And a year after buying virtual reality startup Oculus, Facebook announced it would start shipping the Rift VR headset in early 2016. All this helped push founder Mark Zuckerberg's fortune up nearly $13 billion to date in 2015. Zuckerberg founded the social network in 2004 when he was 19 and dropped out of Harvard to move the company to Silicon Valley

برچسب‌ها: Mark Zuckerberg ,
+ نوشته شده در  شنبه 30 آبان 1394ساعت 0:07  توسط bartar  |  | تعداد بازدید : 165

Alibaba

Alibaba operates the world’s largest online and mobile marketplace, thriving in the world’s largest e‑commerce market. And we’re just getting started. Explore the many ways we’re making it easy to do business anywhere, and changing the way people meet, work and live.


برچسب‌ها: ANNUAL REPORT , Alibaba ,
+ نوشته شده در  شنبه 30 آبان 1394ساعت 0:06  توسط bartar  |  | تعداد بازدید : 84

Ceramic fiber board for wall-hung boilers and gas boiler

The most outstanding characteristic of CCEWOOL Ceramic fiber board for fireplace and gas boiler is that it enjoys light weight, and at the same time it has high compressive strength./ Compared with the normal ceramic fiber boards of the same density, they are 20% harder; comparing to the ceramic boards of the same compressive strength, they are 20% lighter.
برچسب‌ها: Ceramic fiber board for wall-hung boilers and gas boiler ,
+ نوشته شده در  شنبه 30 آبان 1394ساعت 0:02  توسط bartar  |  | تعداد بازدید : 107

Ceramic fiber insulating blanket roll 12x24x50

For Ceramic fiber insulating blanket roll 12x24x50, double needled ceramic fiber blanket has a more flatter surface and better tensile strength and it is hard to tear. You can see the dense needling design after tearing.

For production technique, single needling is traditional while double needling is more advanced that has been improved based on the former.

For the quality, double needling technology greatly improves the tensile strength, making it easier for construction and gaining a steadier insulation effect. So its quality is much better than that produced by common technology.


برچسب‌ها: Ceramic fiber insulating blanket roll 12x24x50 ,
+ نوشته شده در  شنبه 30 آبان 1394ساعت 0:00  توسط bartar  |  | تعداد بازدید : 101

CCEWOOL ceramic fiber module

As a light weight and high efficiency thermal insulation lining,compared with traditional refractory lining, has many advantages.

(1)low density

Ceramic fiber folded module lining is 70% lighter than light weight insulation brick and 75% ~ 80% lighter than castable lining.It can greatly reduce the load on the steel structure of the furnace and prolong the furnace body’s Service life.

(2)low heat capacity

The heat capacity of lining generally is proportional to the weight of the lining , low heat capacity means less heat absorption of kiln in reciprocating operation, and a high temperature rasing speed. Heat capacity of ceramic fiber is only 1/7 of lightweight refractory lining and lightweight fireclay, greatly reduced the energy consumption in the temperature’s operational control, especially has a very significant energy saving effect for intermittent operation of heating furnace.

(3)Low conductivity

When the average temperature of the ceramic fiber module is below 400 DEG, the thermal conductivity is less than 0.11W/ (K - M), and the thermal conductivity is less than 0.22W/ (M - K) when temperature is below 600 DEG, and the thermal conductivity is less than m (K - 0.28W/) at an average temperature of 1000 DEG. It’s about 1/8 of lightweight fireclay brick, is 1/10 of lightweight refractory(castable) lining, and the heat insulation effect is significant .

(4) thermal shock and mechanical shock resistance

The ceramic fiber module is flexible and has excellent resistance to temperature fluctuations and mechanical vibration.


برچسب‌ها: CCEWOOL ceramic fiber module ,
+ نوشته شده در  شنبه 30 آبان 1394ساعت 0:00  توسط bartar  |  | تعداد بازدید : 76

Realizing the Benefits of Ceramic Fiber Insulation

Ceramic fiber insulation has been used in industrial furnaces for more than 30 years. Chief among its benefits, when compared to insulating firebrick, are reduced furnace operating expense due to lower energy storage, rapid cooling capability, and faster heating and recovery rates. Halliburton learned that prefabricated fiber panels could also be used to make rapid, effective, and long-lasting furnace repairs. But fiber insulation systems are not without problems, as Rolls Royce, Howmet, and Airex discovered. Fortunately, they also found a way to fully realize the benefits of ceramic fiber while eliminating the drawbacks. Challenges Rolls Royce Engine Services repairs jet engines, and they use furnaces to heat-treat various engine components. "One of our furnaces was shutting itself down repeatedly. The old fiber lining had deteriorated to the point where it was actually breaking heating elements during operation, which would abort firing cycles," reported Alex Kagan, an Engine Services Engineer for Rolls Royce. Increased maintenance expense and interrupted productivity were the results. Howmet Georgetown Casting specializes in making intricate aluminum and copper-based castings for the aerospace industry. Howmet had previously replaced the fiber lining of one of its furnaces in-house using a competitive fiber product, "but the result was not as durable as we had hoped, and the heat losses were higher than we wanted," explained Bob Hesselink, Howmet's Maintenance Supervisor. The foundry industry can be tough on furnace insulation. Ceramic fiber has to withstand the process, and the occasional abrasion and impact that can occur during loading and unloading operations, while preserving a tight heat-seal. The issue of heat leakage was of great concern to Airex as well. Airex is a manufacturer of premium quality regenerative thermal oxidizers that include a ceramic fiber-lined combustion chamber. Operations Manager Richard Whitford described the challenge. "Ceramic fiber insulation is a very important aspect of our thermal oxidizer design. If ceramic fiber is not installed properly, hot spots occur that can burn through the steel shell and cause serious problems," he said. Halliburton had an emergency. The company manufactures diamond tool bits used in the oil drilling industry. When the roof of one of their production furnaces unexpectedly collapsed, Halliburton needed a solution right away - one that would last for many years. "The loss of production for one day in a single furnace can cost the company $100,000 or more," explained Kelly Malone of their Manufacturing Engineering department. A


برچسب‌ها: Realizing the Benefits of Ceramic Fiber Insulation ,
+ نوشته شده در  جمعه 29 آبان 1394ساعت 23:59  توسط bartar  |  | تعداد بازدید : 130

Top Zone

producing soda lime glass, both the functions of the refractories and the operating conditions within the checkers should be taken into consideration.

As heat exchangers, checkers should have high thermal capacity and thermal conductivity. Basic refractories and fused cast refractories are the best solution.

However, refractory selection also depends on the operating conditions, while the operating conditions depend on the position. According to the temperature, checkers can be divided into four zones: Top zone (from the first row to 1,350℃), Mid zone (from 1,350℃ to 1,000℃), Condensation zone (from 1,000℃ to 700℃) and Lower zone (from 700℃ to rider arches).

Top Zone

High temperature and batches and dusts result in chemical attack and gradual corrosion of the basic refractory bricks. If refractories are magnesia bricks, the chemical attack is up to the CaO/SiO2 ratio in the waste gases. if the radio is low, forsterite (Mg2SiO4) will be formed, which results in fissures opening within the bricks. Subsequently, silica penetrates these fissures resulting in the familiar cubic breakdown of the upper checkers. If the CaO/SiO2 ratio in the waste gases is high, a liquid phase enters into the refractory causing deformation. The best solution is magnesia bricks with high Mg content, well developed MgO crystals and a direct bonded structure. Additionally, the refractories should have low iron to avoid FeO oxidation to Fe2O3 and vice versa (Fe2O3 reduction to FeO) with volume variations and resultant brick failure.

Fused cast refractories have no surface porosity thus they are resistant to the corrosive effects of waste gases and carryover and can be used in all the checker zones. Compared to sintered refractories they are more resistant to abrasion due to their dense and homogeneous structure thus they are suitable for the top zone where there is a strong carry-over. Fused cast alumina brick is recommended for its very limited glassy phase. No glassy phase means no exudation therefore no excessive bonding with carry-over thus minimizing the risk of blockages.

Mid Zone

This zone is protected by the top checker area and temperature level is lower, thus 96% MgO with low iron and 33# are recommended.

Condensation Zone

This is another critical area. The waste gases contain alkaline sulphate and SO3 which will condense out in the 1,000-700℃ range. In presence of sodium sulphate, the predominance of Na2O or SO3 in the waste gases causes chemical attack. Periclase base refractories are not chemically attacked by sodium sulphate or sodium oxide but they strongly react with SO3 forming MgSO4 causing densification of the Structure.

The chemical attack, enhanced by the presence of vanadium pentoxide when using fuel oil, breaks up the refractory and the structure densification lowers thermal shock resistance. Viable substitutes for chrome bearing refractories, which have a high resistance to condensates but cannot be used for environmental reasons, are both the spinel (MgO·Al2O3) and refractories made by periclase (MgO) and zirconia (ZrO2) having good resistance against Na2O and SO3.

When firing with natural gas, since the SO3 quantity is low, basic refractories can be used. When fused cast material is used, fused cast AZS is recommended.

Low Zone

Super duty fire clay brick can be used in non severe working conditions. 90-92% magnesia brick is recommended when firing by natural gas. Fused cast AZS 33# is also used in this zone.

Silica bricks with identical chemical composition can have differing mineralogical compositions which can cause quite different behavior during use. Therefore, it is not always sufficient to evaluate silica bricks only by their chemical composition. It is essential to also consider the degree of transformation and the thermal expansion behavior of the bricks.

contains cristobalite, tridymite and some residual quartz. The crystal phases each have a high and low temperature forms which can transform reversibly. The crystal structure of the individual SiO2 crystal phase can differ widely. This is of great importance during heating and cooling because of the change in the volume.

Quartz requires the smallest volume and the quartz glass the largest. During firing above approximately 900℃, quartz transforms into the other modifications and melt completely at 1725℃. It shows such a transformation at 573℃, tridymite at 117℃, and cristobalite between 225℃ and 270℃. The thermal expansion of cristobalite is considerably greater than that of the tridymite.

Because well transformed silica bricks contain little or no residual quartz, their behavior under the influence of temperature is largely determined by the ratio of cristobalite to tridymite. During heating up, silica bricks expand rapidly with the total reversible expansion being completed at around 800℃. Therefore they are insensitive to the temperature fluctuations above 800℃, but very susceptible below this temperature because of the sudden volume expansion. For this reason, sufficient time must be allowed for heating furnaces up to about 800℃.

During slow cooling , reversible volume decreases take place which are a result of the spontaneous transformation of the crystal structure from the high to the low temperature modification. The reversible and irreversible volume effects can cause considerable stress within the refractory brick structure.

During the firing process, the lime reacts with the quartzite components to form wollastonite. The matrix also contains very small quantities of calcium ferrite, hematite, magnetite, calcium olivine and hedenbergite, which are formed from impurities. These crystalline phases are the reason for the discoloration and spot formation on the silica bricks.

The degree of transformation of the bricks can be determined easily and accurately by the density of the residual quartz content. The density of a silica brick is lowest when the degree of transformation is farthest advanced.

The appearance of the bricks also indicates to the degree of transformation. The reversible thermal expansion also depends on the mineral composition. Tridymite and cristobalite do not expand linearly during heating but exhibit sudden changes in length both during heating and during cooling.


برچسب‌ها: Top Zone , fused cast , AZS , Crystalline Phases And Transformation Of Silica Bricks , Silica brick ,
+ نوشته شده در  جمعه 29 آبان 1394ساعت 23:58  توسط bartar  |  | تعداد بازدید : 93

The Selection Of Refractories For Regenerator Checkers In Soda Lime Glass Furnaces

When selecting refractories for regenerator chambers serving natural gas fired furnaces producing soda lime glass, both the functions of the refractories and the operating conditions within the checkers should be taken into consideration.

As heat exchangers, checkers should have high thermal capacity and thermal conductivity. Basic refractories and fused cast refractories are the best solution.

However, refractory selection also depends on the operating conditions, while the operating conditions depend on the position. According to the temperature, checkers can be divided into four zones: Top zone (from the first row to 1,350℃), Mid zone (from 1,350℃ to 1,000℃), Condensation zone (from 1,000℃ to 700℃) and Lower zone (from 700℃ to rider arches).

Top Zone

High temperature and batches and dusts result in chemical attack and gradual corrosion of the basic refractory bricks. If refractories are magnesia bricks, the chemical attack is up to the CaO/SiO2 ratio in the waste gases. if the radio is low, forsterite (Mg2SiO4) will be formed, which results in fissures opening within the bricks. Subsequently, silica penetrates these fissures resulting in the familiar cubic breakdown of the upper checkers. If the CaO/SiO2 ratio in the waste gases is high, a liquid phase enters into the refractory causing deformation. The best solution is magnesia bricks with high Mg content, well developed MgO crystals and a direct bonded structure. Additionally, the refractories should have low iron to avoid FeO oxidation to Fe2O3 and vice versa (Fe2O3 reduction to FeO) with volume variations and resultant brick failure.

Fused cast refractories have no surface porosity thus they are resistant to the corrosive effects of waste gases and carryover and can be used in all the checker zones. Compared to sintered refractories they are more resistant to abrasion due to their dense and homogeneous structure thus they are suitable for the top zone where there is a strong carry-over. Fused cast alumina brick is recommended for its very limited glassy phase. No glassy phase means no exudation therefore no excessive bonding with carry-over thus minimizing the risk of blockages.

Mid Zone

This zone is protected by the top checker area and temperature level is lower, thus 96% MgO with low iron and 33# are recommended.

Condensation Zone

This is another critical area. The waste gases contain alkaline sulphate and SO3 which will condense out in the 1,000-700℃ range. In presence of sodium sulphate, the predominance of Na2O or SO3 in the waste gases causes chemical attack. Periclase base refractories are not chemically attacked by sodium sulphate or sodium oxide but they strongly react with SO3 forming MgSO4 causing densification of the Structure.

The chemical attack, enhanced by the presence of vanadium pentoxide when using fuel oil, breaks up the refractory and the structure densification lowers thermal shock resistance. Viable substitutes for chrome bearing refractories, which have a high resistance to condensates but cannot be used for environmental reasons, are both the spinel (MgO·Al2O3) and refractories made by periclase (MgO) and zirconia (ZrO2) having good resistance against Na2O and SO3.

When firing with natural gas, since the SO3 quantity is low, basic refractories can be used. When fused cast material is used, fused cast AZS is recommended.

Low Zone

Super duty fire clay brick can be used in non severe working conditions. 90-92% magnesia brick is recommended when firing by natural gas. Fused cast AZS 33# is also used in this zone


برچسب‌ها: The Selection Of Refractories For Regenerator Checkers In Soda Lime Glass Furnaces , fused cast , AZS , Low Zone ,
+ نوشته شده در  جمعه 29 آبان 1394ساعت 23:56  توسط bartar  |  | تعداد بازدید : 78

Advantages of Ceramic Fiber Module


Ceramic fiber module is made of ceramic fiber blanket by folding and compressing. Currently, it gradually becomes the first choice for the thermal insulation of industrial furnace linings.

has white color and regular size. It can be directly fixed to the anchor nail on the steel plate of the furnace shell. It has good insulation performance and can improve the integrity of the furnace. It simplifies and speeds up the construction of furnaces and promotes the masonry techniques of furnaces.

It has many advantages over the ceramic fiber blanket.
1) During installation, after releasing the tying, the folded blankets can generate a huge stress, which makes them crowded together tightly without gaps.
2) The flexibility of ceramic fiber blanket can compensate the deformation of the furnace shell and reduce the construction cost. At the same time, it can make up the gaps caused by the thermal changes of the different components.
3) Since it has light weight and low thermal capacity, it can significantly reduce the energy cost during the temperature operation.
4) Flexible can withstand external mechanical forces.
5) It has good resistance to thermal shock.
6) The ceramic fiber lining requires no drying and maintenance. It can be put into use immediately after the construction is completed.
7) It has stable chemical properties. It is not eroded by acids, bases, water, oil and vapor, except phosphoric acid, hydrofluoric acid and strong base.

It can be used for the furnace lining insulation in the petrochemical industry, metallurgical industry, ceramic industry, glass industry, heat treatment industry and other industries.

Zhengzhou Sunrise Refractory supplies various ceramic fiber products including ceramic fiber blanket, ceramic fiber board, ceramic fiber module, ceramic fiber vacuum formed shapes, calcium silicate board, ceramic millboard, ceramic fiber paper, ceramic fiber bulk, and ceramic fiber cloth tape, rope and yarn.


برچسب‌ها: Advantages of Ceramic Fiber Module , Ceramic fiber module , ceramic fiber blanket ,
+ نوشته شده در  جمعه 29 آبان 1394ساعت 23:54  توسط bartar  |  | تعداد بازدید : 92