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Phosphate castable

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Phosphate bound refractory is a kind of castable refractory prepared by phosphate as binder.Commonly used phosphate binders are aluminum dihydrogen phosphate, sodium phosphate and orthophosphate, and the aggregate is divided into high aluminum, clay, silicon and magnesium.

The composition of phosphate bonded refractory castable is similar to that of general refractory castable. Aluminum phosphate, phosphoric acid and neutral and acidic aggregate react slowly at room temperature. In order to give the castable room temperature hardening performance, hardener must be used.Hardener: active aluminum hydroxide, talc, ammonium fluoride, magnesium oxide, basic aluminum chloride, pure calcium aluminate cement, etc.Magnesium oxide is a widely used hardener, which has a good effect on hardening, but the heat resistance of magnesium phosphate produced by the reaction is poor, resulting in the decline of the thermal strength.

When aluminum phosphate, phosphoric acid and aggregate react, the formation of insoluble substances will lead to aging changes in the material, that is, after being stored for a period of time, the construction performance of the material will decline or even fail.When aluminum dihydrogen phosphate liquid is used as binding agent, the following reactions can easily occur quickly, causing aging changes.

Al (HZPOd),+H: o-aip0, -nhzo + +HSP04

The reaction of aluminum phosphate, phosphoric acid and iron in aggregate and raw material will affect the aging change.Mixing and drilling mud has corrosion effect on the mixing and drilling machine itself, which will lead to equipment damage.

Casting construction of phosphate refractory castable:

According to the different construction parts of industrial furnaces, the construction molds of phosphate refractory castable usually have plane formwork, curved camber formwork, and steel mold and wood mold according to the material.The size of the template should be accurate, the support should be firm, to prevent the displacement of the pouring material during vibration. On the side of the contact between the template and the pouring material, a layer of kraft paper or plastic cloth should be laid, so as to eliminate the pockmarks during the stripping.

During the pouring of phosphate refractory castable, insert man type vibration bar is usually used to vibrate. The vibration time is up to the time when the surface of the castable is pulping. If the vibration time is too long, the interior layer of the castable will be stratified and the strength of the castable will be reduced.Vibration time is too short, the inner part will not be compact.

Zibo Yuneng Kiln Technology Co.,Ltd. is the professional Phosphate castable manufacturer in Shandong。Our company Phosphate castable sincerely obtains the prestige，rewards our customers with the preferential price of Phosphate castable and warm service。Our main products:refractory castable，high strength castable，alumina silicate fiber module，alumina silicate felt，alumina silicate fiber blanket，alumina silicate cotton，etc。The products sell well in dozens of metallurgical，chemical and electric power enterprises all over the country and are well received by users。The company's unique production process，quality management and testing equipment to ensure product quality and stability，has a high-quality staff and professional and technical personnel，according to the different requirements of users，the development and design of a variety of new refractory materials。To know the latest Phosphate castable price can be posted on our website https://www.zbyuneng.cn，we will contact you within 24 hours，Tel: 13864463333 Manager Sun。

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