Preparation method of Chinalco load-bearing ceramic bar beam

Abstract

The invention discloses a China-aluminium bearing ceramic strip beam preparation method. The China-aluminium bearing ceramic strip beam preparation method comprises the following steps: first, performing ball milling and mixing on 40 to 50 weight percent of aluminium oxide, 10 to 20 weight percent of Yichun kaolin, 5 to 15 weight percent of quartz powder, 20 to 35 weight percent of waste ceramic powder, 5 to 10 weight percent of feldspar powder and 1 to 3 weight percent of wollastonite in proportion to obtain a base material; performing ball milling and mixing on nano-scale rare earth powder material with the weight which is 3 to 5 percent of that of the base material and nano-scale graphene powder with the weight which is 3 to 5 percent of that of the base material to obtain a graphene-rare earth enhanced material; adding calcite powder and Guangdong black mud into the base material to prepare a block mud material; extruding, forming, naturally drying, sintering at high temperature toobtain a China-aluminium bearing ceramic strip beam. The China-aluminium bearing ceramic strip beam has good acid and alkali corrosion resistance, has high compressive strength and breaking strength,and has the characteristics of stability, safety, low resistance, low consumption, uniform air flow distribution and high efficiency; the acid yield can be improved by 12 percent or above; the service life can be prolonged by 5 years or above; the material cost is reduced by 20 percent.

Description

technical field [0001] The invention relates to a bar beam used in an acid industrial drying absorption tower, in particular to a Chinalco load-bearing ceramic bar beam and a preparation method thereof. Background technique [0002] In the dry absorption tower of the acid industry, it is necessary to use beams to support fillers and catalysts. Due to the very harsh working conditions of the dry absorption tower, the beams not only need to have good acid and alkali resistance, corrosion and high temperature resistance, but also under the above conditions To have high compressive and flexural strength. At present, most of the beams are slender strips of more than 1 meter and made of ordinary ceramic materials. Ordinary ceramic beams have a small opening rate, low compressive and flexural strength, and the flexural strength is below 120MPa, which is not up to the technical standards. The technical requirement of 200 MPa is required, so in actual production, it is easy to cause...

AI Technical Summary

Problems solved by technology

At present, most of the beams are slender strips of more than 1 meter and made of ordinary ceramic materials. Ordinary ceramic beams have a small opening rate, low compressive and flexural strength, and the flexural strength is below 120MPa, which is not up to the technical standards. The technical requirement of 200 MPa is required, so in actual production, it is easy to cause local damage to the beam, resulting in accidents, or even production stoppage, low thermal stability of work, increased maintenance workload, reduced production capacity, and increased production costs

In order to improve the strength of ordinary bar beams, people often make the bar beams larger and thicker, which not only increases the load of the tower, but also increases the construction cost, and affects the opening ratio and reduces the operating efficiency of the equipment.

At present, people use high-aluminum beams as tower equipment beams. Although their compressive and flexural strengths are good and can meet the technical requirements of use, the high alumina content in high-aluminum beams is generally more than 85%, and the cost of raw materials is high. The firing temperature is above 1650 degrees, the firing time is more than 30 hours, the firing cost is high, and the beam firing shrinkage is large (shrinkage reaches 20%), high brittleness, easy to break, and low impact resistance. short life