Process for producing bauxite homogenized materials in rotary kiln

Abstract

The invention relates to a process for producing bauxite homogenized materials in a rotary kiln, which comprises the following steps: (1) crushing raw bauxite ores, then carrying out deironing processing on the obtained raw bauxite ores so as to obtain a material a; (2) mixing the material a with water, sodium carboxymethyl starch, aluminium dihydrogen phosphate and polymeric AlCl3, then carrying out ball-milling on the obtained mixture so as to obtain a clay material b, wherein the amount of the sodium carboxymethyl starch is 0.3 to 0.6 percent of that of the material a, the amount of the aluminium dihydrogen phosphate is 0.1 to 0.3 percent of that of the material a, the amount of the polymeric AlCl3 is 0.2 to 0.5 percent of that of the material a, and the amount of the water is 30 to 50 percent of that of the material a; and (3) carrying out dehydration, molding and drying on the clay material b sequentially, and then sending the dehydrated, molded and dried clay material b to the rotary kiln to calcine so as to obtain the bauxite homogenized material. The method of the invention rewrites the history that the bauxite homogenized materials can not be produced in the rotary kiln, and the cost of bauxite homogenized material per ton can be reduced by **-**, therefore, the method of the invention has remarkable economic benefits.

Description

technical field [0001] The technology of the invention belongs to the field of refractory raw material production, and in particular relates to a rotary kiln production process of bauxite homogenized material. Background technique [0002] The production process of bauxite homogenized material is a new type of production process developed in my country's refractory raw materials in the past two years. The general production process is to grind, proportion, homogenize, shape and calcine the bauxite raw ore into homogeneous clinker. Because of its stable index and reliable performance, the composition can be artificially changed, and it can completely replace the traditional bauxite. clinker, while Al 2 o 3 The bauxite homogenizing material with high content can even be used instead of brown corundum and white corundum, and the cost performance is extremely high, so it can be quickly popularized and applied. [0003] Since bauxite is a barren refractory raw material with a ...

AI Technical Summary

Problems solved by technology

If a rotary kiln is used to produce bauxite homogenized material, under the dynamic production conditions of rotary kiln rotation, coupled with rolling friction, the pulverization phenomenon is extremely serious, resulting in special powder and debris in the finished bauxite homogenized material Many, unable to meet the market demand standards for bauxite homogenizing material products

Therefore, at present, domestic manufacturers all use downdraft kiln, shuttle kiln and tunnel kiln to produce bauxite homogenized material, but the rotary kiln with large output, good energy saving and the most widely used cannot be used to produce bauxite homogenized material , resulting in a waste of resources