Fundamentally changed the wholesale of magnesium bricks in the factory

In the consumption of energy (fuel, electricity, water, etc.) of various refractory products (except fused materials), magnesium chrome bricks, magnesia bricks, and magnesium fire mud account for 70% to 80% of flammable materials. The focus of energy conservation work should be on reducing fuel consumption. Therefore, it is necessary to carry out thermal analysis of the kiln, prepare a heat balance table of the kiln, comprehensively analyze the heat consumption, and find out the main direction and energy saving measures to reduce heat consumption and improve thermal efficiency. According to custom, refractory furnaces use unit heat consumption as a measure of thermal economic performance. However, the heat consumption per unit of product can only be compared between similar products. Although the thermal economy of the kiln can be compared relatively, it does not reflect the utilization of the kiln in thermal energy.

The real situation of the face. If there is no scientific measure of the utilization of thermal energy in the kiln, it will inevitably hinder the efforts to improve the thermal economic performance of the refractory kiln in the future. Industrial furnaces at home and abroad generally use "thermal efficiency" as a measure of the quality of thermal energy utilization. The refractory furnace kiln can eliminate the incomparable factors caused by the different properties of the refractory raw materials through the comparison of "thermal efficiency", so it is also very suitable for the refractory furnace.

Under the arrangement of the former Ministry of Metallurgical Industry, the Anshan Coking Refractory Design and Research Institute compiled the “Interim Provisions on the Measurement and Calculation of Thermal Equilibrium for Tunnel Kilns, Shaft Kilns and Rotary Kilns” in the 1980s, and carried out on several furnaces. After the experiment, it was approved as an industry standard.

Evaluation of furnace thermal economy standards using thermal efficiency η

η=∑Qe/∑Qi

Where: ∑Qe—the sum of the theoretical values of the physicochemical heat consumed by the materials in the system during calcination;

∑Qi———System total heat income

The "thermal efficiency" for evaluating the performance of a kiln in a regulation is defined as the sum of the theoretical values of physicochemical heat (ie, "effective heat") consumed by the materials in the system during the calcination process and the total heat income. As the variety of refractory materials continues to increase, the "effective heat" data for the heating and calcination of some new varieties needs to be determined by scientific methods. Through the "thermal efficiency" measurement of the kiln, it is found that the heat loss is mainly the heat loss of the exhaust gas, the heat loss on the surface of the kiln body and the heat loss of the kiln car/kiln body. Based on this, it is determined that the old furnace and kiln are designed and the new furnace is designed. Reliable technical support.

(2) Monitoring and remediation of environmental conditions of furnace kiln pollution

Kiln and dust are one of the key sources of pollution. From 1990 to 1992, Anshan Jiao Ningyuan conducted an investigation and analysis of the pollution status of refractory factories in China, including mechanized shaft kiln, ultra-high temperature shaft kiln, rotary kiln, tunnel kiln and heat treatment kiln of alkaline refractory plant. Monitoring of various pollution factors. As a result, the four kinds of harmful substances in the kiln flue gas are in accordance with the degree of pollution of the environment, in order: SO2, CO, NOx and soot. Compared with the degree of pollution of different kiln kiln, it is tunnel kiln, heat treatment kiln, rotary kiln, ultra-high temperature shaft kiln and mechanized shaft kiln. In particular, the mechanized shaft kiln is seriously exceeding the standard. The discharge of harmful substances is shown in Table 3. The multi-tube dust collector and cyclone dust collector are used. The dust removal efficiency is low, the concentration of exhaust smoke is seriously exceeded, and the effect of using electric dust removal and bag filter is good.