This paper introduces the operation condition of low caloricity gas-lit Maerz lime kiln and existing problems and corresponding solutions，the performance of the new equipments and innovative technologies during design and production process，and the product quality track report. The actual result shows that the kiln is running better than expected，the products quality is satisfacting，the lime average activity is 380～420mL，and the thermal loss is very low.

This paper studies the impact of forming pressure to performances of synthesized CaZrO₃，which is made of fused zirconia powder and active lime powder as raw materials，and analyses the mineral facies and microstructure by XRD and SEM.The results show that density increases with the forming pressure going up；when the pressure reaches up to 200MPa，its effect on density becomes weak；the pressure has no effect on mineral facies and little effect on microstructure.In conclusion，the optimal forming pressure value is 200MPa.

ZrO₂-C refractory materials are widely used for slag line of submerged nozzle for con-casting and the head of stopper owing to the high corrosion-resistance.This paper describes the raw materials，the corrosion mechanism and measures for improving the corrosion-resistance of the ZrO₂-C refractory materials.
ZrO₂-C refractory materials； Submerged nozzle； Slag line； Corrosion-resistance

Through the laboratory physical simulation，we study the effects of argon gas blowing at the bottom installed gas permeable bricks on steel flow and inclusion removal inside the tundish.Combining the residence time distribution curves（RTD curves），mean residence time，dead region and volume fraction of plug flow，we study steel flowability with and without gas permeable bricks of different areas.Then we can concluded that the bottom gas blowing can improve the steel flow condition，prolong response time and reduce the dead region volume.When the distances between the top of the tundish and porous diversion wall and the gas curtain are 600mm and 500mm respectively，the result shows the longest mean residence time and the smallest dead region volume.

This paper introduces the current situation and development of taphole clay in China and abroad，and unveils the existing problems and puts forward research approaches and prospects of taphole clay in blast furnace.

In this paper,we study the effect of cement on construction performance of castables，by changing the cement contents in castables，which is made of alumina cement as raw material.

In this paper，the improvement of automatic dust removal system for lime delivery are introduced.When the lime is being conveyed out of bunker,VVVF motor for dust removal starts through photoelectricity switch.Dusty gas is firstly collected under negative pressure of induced draft fan,then fed into dust hopper and discharged into elevator by screw conveyor.Automatic variant frequency start of the dust removal system and dust recovery and utilization can be realized,simultaneously dust emission is cut down.