Calcium hexaluminate-calcium titanate complex-phase refractory raw material and preparation method thereof: Fid-Bau Portal

Calcium hexaluminate-calcium titanate complex-phase refractory raw material and preparation method thereof

ZHAO HUIZHONG / LI YICHONG / FENG LI / LIU YANLI

The invention relates to a calcium hexaluminate-calcium titanate complex-phase refractory raw material and a preparation method thereof. According to a technical scheme, the method comprises the following steps: placing a titanium-iron slag block on a cushion sand layer paved by titanium-iron slag particles, conducting calcining for 4-6 hours in an air atmosphere at a temperature of 1560-1620 DEG C, carrying out cooling, and removing the cushion sand layer to obtain a porous block; then carrying out crushing and ball-milling; and carrying out mechanical pressing, putting an a formed product into a resistance furnace, carrying out heat preservation at 1450-1500 DEG C for 1-3 hours, carrying out cooling, and performing crushing to obtain the calcium hexaluminate-calcium titanate complex-phase refractory raw material. The main crystalline phase of the calcium hexaluminate-calcium titanate complex-phase refractory raw material is calcium hexaluminate and calcium titanate, and the other phase is titanium dioxide. The method is simple in process and low in production cost; and the prepared product has the characteristics of few impurities, high melting point, large volume density, high refractoriness, high strength, stable high-temperature performance and large calcium hexaluminate size.

本发明涉及一种六铝酸钙‑钛酸钙复相耐火原料及其制备方法。其技术方案是：将钛铁渣块体置于用钛铁渣颗粒铺成的垫砂层上，于空气气氛和1560~1620℃条件下煅烧4~6小时，冷却，舍去垫砂层，得到多孔状块体；然后破碎、球磨；机压成型，再置于电阻炉中，在1450~1500℃条件下保温1~3小时，冷却，破碎，制得六铝酸钙‑钛酸钙复相耐火原料。所述六铝酸钙‑钛酸钙复相耐火原料的主晶相为六铝酸钙和钛酸钙，其他物相为二氧化钛。本发明工艺简单和生产成本低；所制制品具有杂质少、熔点高、体积密度大、耐火度高、强度高、高温性能稳定和六铝酸钙尺寸大的特点。

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