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Casting material furnace lining and zinc leaching slag removal rotary kiln with the furnace lining

A rotary kiln and casting material technology, applied in the field of refractory materials, can solve the problems of high maintenance rate, short life of brick furnace lining, easy nodulation on the inner wall of furnace lining, etc., and achieve stable operation, not easy to build up slag, and resistance to high temperature blowing process Effect

Active Publication Date: 2020-08-04
洛阳市洛华粉体工程特种耐火材料有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a casting material furnace lining and a zinc leaching and slag removal rotary kiln with the furnace lining, so as to solve the problems of the prior art that the brick furnace lining has a short service life, a high maintenance rate, and the inner wall of the furnace lining is easy to form nodules.

Method used

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  • Casting material furnace lining and zinc leaching slag removal rotary kiln with the furnace lining
  • Casting material furnace lining and zinc leaching slag removal rotary kiln with the furnace lining
  • Casting material furnace lining and zinc leaching slag removal rotary kiln with the furnace lining

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Embodiment 1

[0026] This embodiment provides a pouring material furnace lining, which includes raw material components of 60 parts by weight of aluminum oxide, 20 parts by weight of magnesium oxide, and 10 parts by weight of silicon dioxide. All components are mixed uniformly to obtain a pouring material. The furnace lining blank is obtained by pouring the material as a whole, and then the furnace lining blank is baked, and then transferred to continuous high-temperature baking after continuous low-temperature baking to obtain the pouring material furnace lining. After this treatment, on the one hand, moisture is removed, and on the other hand, the construction stress is removed, so that the strength of the furnace lining is enhanced, and it is more resistant to high temperature and less likely to be damaged during use.

[0027] After baking, start to feed and put into operation. From the 1st to 5th day of operation, the input of 70% of the rated feeding amount will continue to increase. On...

Embodiment 2

[0030] The present embodiment provides a castable furnace lining, which comprises raw material components of 30 parts by weight of aluminum oxide, 30 parts by weight of magnesium oxide, 10 parts by weight of graphite, and no more than 30 parts by weight of other components. All components are mixed uniformly to cast The pouring material is poured as a whole to obtain the furnace lining blank, and then the furnace lining blank is baked, and the continuous low-temperature baking is carried out first, and the baking temperature is started at room temperature, and the heating is continued for 3 days, and the temperature is controlled up to 800°C for 5 days to prepare castable furnace lining. After continuous high-temperature baking, the furnace is not stopped, and the feeding and operation are started. On the 1st to 3rd day of operation, the input of 30% of the rated feeding amount is continuously increased, and the normal operation is started on the 4th day.

Embodiment 3

[0032] This embodiment provides a castable furnace lining, comprising raw material components of 60 parts by weight of aluminum oxide, 5 parts by weight of magnesium oxide, 3 parts by weight of graphite, 12 parts by weight of silicon carbide, and 10 parts by weight of calcium oxide. Mix the pouring material evenly, cast the casting material as a whole to obtain the furnace lining blank, and then bake the furnace lining blank, first carry out continuous low-temperature baking, start baking at room temperature, and continue to heat up for 7 days. The temperature is controlled up to 800°C to prepare the castable lining.

[0033] After that, start to feed and put into operation. From the 1st to 4th day of operation, the input of 50% of the rated feeding amount will continue to increase, and the transfer will be transferred to normal operation on the 5th day.

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Abstract

The invention provides a castable furnace lining. The castable furnace lining is prepared from 30-70% of aluminum oxide and 5-30% of magnesium oxide, the raw materials are evenly mixed to obtain a castable, the castable is subjected to one-piece casting to obtain a furnace lining semifinished product, and the furnace lining semifinished product is baked to prepare the castable furnace lining, wherein in the baking process, continuous high-temperature baking is conducted after continuous low-temperature baking. By means of the castable furnace lining, the problems are solved that in the prior art, a bricked furnace lining is short in life and high in repair rate, and accretion on the inner wall of the furnace lining is easily caused.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a pouring material furnace lining and a zinc leaching and slag removal rotary kiln with the furnace lining. Background technique [0002] Rotary kiln is a commonly used equipment in the heat treatment process of metallurgy, building materials, chemical industry and various raw materials and various garbage fertilizers. The rotary kiln has a lining. Once the lining of the rotary kiln is seriously damaged, it will cause passive shutdown, and the maintenance time is long and the cost is high, so that the utilization rate of the equipment is low. [0003] Zinc leaching slag is a solid zinc-containing waste that requires high-temperature treatment and decomposition, and is highly corrosive. At present, the lining of rotary kilns at home and abroad is generally built with refractory bricks, and the requirements for the strength and shape of refractory bricks a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/04C04B35/14C04B35/66C04B35/622F27B7/32F27D1/16
CPCC04B35/04C04B35/10C04B35/14C04B35/622C04B35/66C04B2235/3208C04B2235/3826C04B2235/425C04B2235/9669F27B7/3205F27D1/16Y02P10/143
Inventor 李朝侠黄河
Owner 洛阳市洛华粉体工程特种耐火材料有限公司
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