《镁质耐火材料工业大气污染物排放标准》(DB21/3011-2018)是辽宁省第一个强制性大气污染物排放标准,也是该行业首个强制性排放标准.本文介绍标准编制的背景及依据,解析标准执行时段、排放限值等相关要求,便于镁质耐火材料企业、环保企业、环境主管部门等准确掌握标准的主要技术内容,积极推进标准的贯彻实施.

This paper summarizes and extracts several popular problems in the engineering construc -tion process of double chamber shaft lime kiln , and based on experience proposes relevant sugges-tions to provide reference for staff in the field of design of double chamber shaft kiln .

This paper compares the properties of magnesia-dolomite system refractories with different contents of CaO.It is concluded that with the increase of CaO content in samples, the hydration resistance reduces gradually,when the CaO content is below 20%,the samples have good hydration resistance,when the CaO content reaches 56.9%,the hydration resistance drops evidently,and the samples will not be used any more.

In design of JNS400 double chamber shaft kiln ,three-dimension design and analogue sim-ulation were used for calculating flow field of the gas and temperature distribution in chambers with CFD analogue simulation software .And solidworks software was used for three-dimension design , stress analysis and structure optimization on the key parts of the JNS 400 shaft kiln.

To increase yield and performance indicators and decrease product energy consumption, the key parts and equipment in production of silica bricks which can easily effect product perform-ances and yield were studied. Furthermore,with reference to domestic and international advanced technologies,the raw materical iron-removal process and automatic added system for additives and mineralizers were developed and a best technical program was determined for the production of high quality silica bricks to optimize product quality and minimize the energy consumption.

The corundum castable samples with different nano-CaCO3 contents are prepared by taking tabular corundum,alumina powder,commodity calcium carbonate,Alphabond300 as main raw materials and FS10 as water reducer,and their apparent porosities,bulk densities and crushing strengths after the heat treatments at 1 000℃ and 1 600℃ are measured.The microstructures of the materials are observed with scanning electronic microscope.The result shows that when the water reducer is added in a constant amount,with the increase of nano-CaCO3 addition amount the water demand is increased gradually,apparent porosity is raised and crushing strength is heightened inch by inch.Under the condition that the basically same flow values of the castables are controlled,apparent porosity is enlarged obviously,but crushing strength is heightened gradually with the increase of the nano-CaCO3 addition amount.

Through the site investigation of some passivated lime production plants in China, the working principle and grinding efficiency of different lime grinding equipment are described and compared in order to solve the issue of equipment selection in the active lime grinding process.

回收盐渣并利用在回收的铝基化合物上或加入其它产品,如铝矾土质耐火材料中,此种方法是可行的.