Characteristic of brick of phosphatic tall aluminium:
1, have fight chemical aggressivity goodly, and fight alkaline ability far excel clay brick, tall aluminous brick.
2, have relatively high strenth, wearability is good.
3, have good heatproof shake sex.
Cent is phosphatic firebrick phosphatic brick and phosphatic wear-resisting brick. Distinction is with phosphatic brick applicable phosphoric acid makes bond, phosphatic wear-resisting brick is with phosphoric acid 2 hydrogen aluminium makes bond. General component is cheap phosphate brick and high temperature phosphate brick. Distinction of these two kinds of bricks is not big, because phosphatic brick has better wearability. The brick is high-grade phosphate Gao He is soft phosphatic brick.
Will common tall aluminous brick puts the macerate in phosphate or phosphoric acid solution, after passing proper time take out from inside phosphatic solution or phosphoric acid solution, classics is dry can throw use.
Test result makes clear, the loading bate temperature of former tall aluminous brick is the tall aluminous brick of macerate of solution of phosphate of classics of 1535 ℃ ; , loading bate temperature is the tall aluminous brick of macerate of phosphoric acid of classics of 1565 ℃ ; , loading bate temperature is 1570 ℃ . The experiment still makes clear, the porosity after classics phosphate or phosphoric acid macerate is reduced apparently, firebrick density increases, fight fold intensity to rise apparently. For example, apparent pore of former tall aluminous brick is led for 22.33% , bulk density is 2.69g/cm, , normal temperature is fought fold intensity to be 20.57MPa, the apparent pore after macerate of classics phosphate solution is led for 13.33% , bulk density is 2.89g/cm3, normal temperature is fought fold intensity 34.32MPa. Via phosphatic macerate the line change of tall aluminous brick is led also by former brick + 1.67% fall to + 0.495% .
With phosphate (or phosphoric acid) brick of macerate tall aluminium is ameliorable the quality of tall aluminous brick, prolong its service life.
Phosphatic brick is one kind is avoided bake bricks, it is technology on the foundation of tall aluminous brick is improved, have fireproof temperature tall, high strenth, wear-resisting, the advantage that acid-proof sex erodes, defect is loading bate temperature low, use temperature is controlled in 1200 degrees. New-style cement rotary kiln (700-1500t/d) on transfer the liner of belt, safety belt and cooling machine often is used.
Make tall aluminous brick use bond: Soft qualitative clay has better plasticity, accordingly, make tall aluminous brick use soft qualitative clay to make bond normally. But, the free Al2O3 in the free SiO2 in clay and tall aluminous aluminous grog produces Molaishi 2 times to convert reaction below 1200 ℃ , produce larger put oneself in another's position to expand, the porosity of silicon increases, intensity is reduced. Accordingly, the affiliation of pink of the clay in burden is measured with exceeding 5% advisable.
Phosphatic brick need is moistureproof, react need for two respects from physical property and chemistry moistureproof:
As firebrick for, having a collective character is bibulous, it is usually a few bibulous, and not easy and natural air, although itself does not fear water, but stoving must want before using, protracted project plan, waste time and labour force.
Ion of phosphoric acid root encounters water to be able to produce hydrolysis to react, specific response no longer give uncecessary details. Because this reaction is reversible reaction, phosphate turns medium phosphoric acid may depreciate, opposite acidity is reduced, can affect its application characteristics.
Accordingly of phosphatic brick depositing is to need to had done waterproof and moistureproof work.
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