By analysing phase diagram，the raw matericals，such as corundum，α-Al2O3 micro powder，spinel and fused magnesia and sol or/and brine composite binder for unburned carbon\|free alumina\|magnesia spinel brick were determined in this paper.The effects of different amounts of spinel powder，fused magnesia，chemical magnesia，α-Al2O3 micro powder，Cr2O3 fine powder and SiO2 micro powder on performance of carbon\|free alumina\|magnesia spinel brick were observed.

In this paper,according to operation principles of the preheater feeding room,a finite element model of different structural style feeding room was built.On the simulation analysis of heat transfer field of different structural style feeding room based on computational fluid dynamics software Fluent,the distribution of velocity field and temperature field in feeding room was obtained.And the influences on the velocity field and temperature field of the feeding room structure were analyzed.

This article introduces a method of quickly replacing spray gun in Maerz kiln and analyses the burnt-loss reasons of the spray gun，moreover proposes suggestions to improve the life.

To supply the superfluous lime after crushing for sintering,Liuzhou Steel Iron ＆ Steel Co. constructed a new production line of lime crushing in lime warehouse.The processing set\|up,conditions of construction,technical parameters and effection of lime crushing production line were introduced.

In order to save energy, reduce consumption and control cost, reformation of transmission gear, valve and gas pipeline of friction press was carried out to solve the problems of low efficiency of energy and air leakage in molding of silica brick. Meanwhile, reformation of ejection gun of nature gas nozzle and spinning disk in tunnel kiln for firing silica bricks was also carried out to reduce the production cost and firing cost.

This paper introduced the mixed charging process and configuration of the energy-saving lime shaft kiln in detail.Technical reconstruction improved the product quality and reduced staff for greater efficiency and higher productivity.

Porous cordierite was prepared with powder of light-burned magnesia，waste nozzle and silica fume as raw materials.The paper analyzed the effects of magnesium oxide on bulk density,crystialline composition and microstructure of the porous cordierite，which were characterized by XRD and SEM.The result shows that the porous cordierite material with cordierite as major crystal phase can be prepared by high\|temperature solid\|phase sintering method.But excessive addition of light\|burned magnesite will reduce the porosity and increase the boltonite phase.

This paper introduces the optimization of mechanical level probes which was often trapped in lifting，causing frequent shut down of the roasting plant of Maerz kiln in SISG.It was proved that after optimization，the mechanical level probes can be lifted smoothly，providing good conditions for safe and stable production of the kiln.