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A special high-alumina ball for preparing kaolin roasting and activating rotary kiln

A technology of roasting activation and high-alumina balls, which is applied in the fields of environmental protection and resource recycling comprehensive utilization, can solve the problems of not realizing high-value utilization of fly ash, and achieve the effect of reducing production costs and reducing environmental pollution

Active Publication Date: 2020-07-28
永春县产品质量检验所福建省香产品质量检验中心国家燃香类产品质量监督检验中心福建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the technical solution proposed in prior art 1 is to provide a high-strength high-alumina refractory ball for smelting. The high-strength high-alumina refractory ball is mainly used in the heat storage chamber of the hot blast stove for heat exchange in the hot blast stove. The purpose of preparing kaolin by grinding the fly ash of the circulating fluidized bed coal-fired boiler in the converter is different; the existing technology 2 adopts the technical scheme of combining the fluidized bed furnace and the rotary kiln, but the flue gas of the fluidized bed furnace does not contact with the material, and the smoke in the flue gas ( Fly ash) is used as a pollutant to be purified by a settling chamber and an electrostatic precipitator, and then discharged to the chimney, which does not achieve the purpose of high-value utilization of fly ash

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] This example provides a special high alumina ball for preparing kaolin roasting and activating rotary kiln. The components include aggregates, reinforcing agents, and binders. The aggregates include kaolinite and sericite, which are mechanically crushed to remove iron and sieve. to 100 mesh, stale and aged for 24-48 hours, and dried at 60°C; the reinforcing agent includes quartz fiber; the binder includes potassium oxide, potassium chloride, and borax, and the fineness is ≥325 mesh.

[0016] The components are weighed according to the following proportions: kaolinite 80 parts; sericite 20 parts; quartz fiber 1.5 parts; potassium oxide 1 part; potassium chloride 0.8 parts; borax 0.8 parts.

[0017]After weighing and matching, send it to the stirring tank to mix evenly, send it into the spherical mold cavity, press and shape it under the pressure of 50-60MPa, keep the heating rate of 50℃ / h for firing, and then keep it at 1280℃ for 1-2h Sintering is a finished product, and...

Embodiment 2

[0019] This example provides a special high alumina ball for preparing kaolin roasting and activating rotary kiln. The components include aggregates, reinforcing agents, and binders. The aggregates include kaolinite and sericite, which are mechanically crushed to remove iron and sieve. to 100 mesh, stale and aged for 24-48 hours, and dried at 60°C; the reinforcing agent includes quartz fiber; the binder includes potassium oxide, potassium chloride, and borax, and the fineness is ≥325 mesh.

[0020] The components are weighed according to the following proportions: 65 parts of kaolinite; 35 parts of sericite; 1 part of quartz fiber; 0.5 part of potassium oxide; 0.5 part of potassium chloride; 0.5 part of borax.

[0021] After weighing and matching, send it to the stirring tank to mix evenly, send it into the spherical mold cavity, press and shape it under the pressure of 50-60MPa, keep the heating rate of 50℃ / h for firing, and then keep it at 1280℃ for 1-2h Sintering is a finis...

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Abstract

The invention relates to the technical field of environmental protection, in particular to a high alumina ball special for preparation of a kaolin roasting and activating rotary furnace. The high alumina ball is characterized in that the components comprise aggregate, an enhancer and adhesive; the basic proportion of the components is as follows: 65 to 80 parts of kaolinite, 20 to 35 parts of sericite, 1 to 1.5 parts of quartz fiber, 0.5 to 1 part of potassium oxide, 0.5 to 0.8 part of potassium chloride and 0.5 to 0.8 part of borax; the high alumina ball is prepared by the steps of weighing the components, feeding the components into a stirring kettle, mixing uniformly, feeding into a spherical model cavity, pressing and forming under the pressure of 50 to 60 MPa, sintering by maintainingthe temperature-increasing speed of 50 DEG C / h, and performing heat preservation at the temperature of 1280 DEG C for 1 to 2 hours to sinter to prepare a finished product; and the diameter of the finished production high alumina ball is 10 to 12 cm. Compared with the prior art, the high alumina ball has higher compressive strength and higher impact strength under the high-temperature use environment condition of high temperature of 500 to 1000 DEG C.

Description

technical field [0001] The invention relates to the technical field of environmental protection and resource recycling and comprehensive utilization, in particular to a special high-alumina ball for preparing kaolin roasting and activating a rotary kiln. Background technique [0002] Kaolin is widely used, mainly used in papermaking, ceramics, rubber and plastics, chemical industry, paint, medicine and other industries. The main mineral component of kaolin is kaolinite, and the crystal chemical formula of kaolinite is 2SiO 2 ·Al 2 o 3 2H 2 O, through the calcination process to remove organic matter and lattice reconstruction; mechanical pulverization and jet pulverization to a sufficient fineness to meet the requirements of preparing fillers such as cable plastics and rubber sealing rings, paper coatings, molecular sieves, and catalyst carriers. Circulating fluidized bed coal-fired boiler fly ash is the most common waste in the boiler production process, the main componen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/36C01B33/26
CPCC01B33/26C04B33/36C04B2235/3201C04B2235/3409C04B2235/3481C04B2235/5232
Inventor 杨松
Owner 永春县产品质量检验所福建省香产品质量检验中心国家燃香类产品质量监督检验中心福建