A method for improving rotary kiln and producing cement by-product yellow phosphorus or phosphoric acid

A kiln cylinder and kiln head technology, applied in the field of phosphorus chemical industry and building materials production, can solve the problems of reduced power consumption and single product, and achieve the effect of saving energy consumption, low cost and reducing production cost

Active Publication Date: 2016-08-17
四川金磷硅谷科技有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to provide a method for improving the rotary kiln and producing cement by-product yellow phosphorus or phosphoric acid. The device is equipped with a gas sealing device at the head and tail of the rotary kiln, and simultaneously sets a feeding pipe gas sealing device and a gas material sealing device. , can create an anaerobic environment for the rotary kiln, adopt this rotary kiln to produce cement while by-product yellow phosphorus or phosphoric acid can be realized, the cement output is equivalent to the existing production capacity (but can get yellow phosphorus while producing cement Phosphorus or phosphoric acid product), which solves the single product problem of cement production, and compared with the electric furnace method in terms of overall cost, it can reduce the production cost of yellow phosphorus by more than 80%, and the power consumption of yellow phosphorus products is reduced by more than 170 times (deducted cement production power consumption)

Method used

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  • A method for improving rotary kiln and producing cement by-product yellow phosphorus or phosphoric acid

Examples

Experimental program
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Effect test

Embodiment 1

[0036] An improved rotary kiln, comprising a kiln head cover shell 1 and a kiln tail cover shell 2 arranged at both ends, a rotary kiln cylinder 3 arranged between the kiln head cover shell 1 and the kiln tail cover shell 2, setting The kiln head gas sealing device 4 between the kiln head cover shell 1 and the rotary kiln shell 3, and the kiln tail gas sealing device 5 arranged between the kiln tail cover shell 2 and the rotary kiln shell 3;

[0037] The upper part of the kiln head cover shell 1 is connected with an air supply device 6, and the air supply device 6 is connected with the kiln head air seal device 4 and the kiln tail gas seal device 5 to provide positive pressure without oxygen for the kiln head air seal chamber 10 and the kiln tail gas seal. body; the lower end of the kiln head cover shell 1 is provided with a blanking pipe gas sealing device 7, and the blanking tube gas sealing device 7 is provided with an oxygen-free gas inlet 01 for the oxygen-free gas to ente...

Embodiment 2

[0042] Similar to Example 1, the difference is that the kiln head gas sealing device 4 includes a sealing body 8 and a gas sealing retaining ring 9, the sealing body 8 is arranged on the kiln head cover shell 1, and the gas sealing retaining ring 9 is fixed on the rotary kiln The cylinder body 3 can rotate with the rotary kiln cylinder body 3, and the sealing body 8 is in sliding contact with the outer edge of the gas seal retaining ring 9 to form the gas seal chamber 10 in the kiln head gas seal device 4. The kiln head gas seal device 4 and the kiln head gas seal device 4 Tail gas sealing device 5 has the same structure, that is, kiln tail gas sealing device 5 also includes sealing body 8 and gas sealing retaining ring 9, sealing body 8 is arranged on kiln tail cover shell 2, and gas sealing retaining ring 9 is fixed on rotary kiln cylinder body 3 The top can rotate with the rotary kiln cylinder 3, and the sealing body 8 is in sliding contact with the outer edge of the gas sea...

Embodiment 3

[0049] P in phosphate rock 2 0 5 content 6-31%, calcium oxide content 36-48%, Si0 in silica 2 content of 75-99%, anthracite, and C content of 75-82%.

[0050] The method of simultaneously producing yellow phosphorus or phosphoric acid by-product of the cement produced by the aforementioned device, by weight, 60 parts of phosphorus-containing ore, 3 parts of silica, and 10 parts of anthracite are mixed according to the requirements of the cement production process and then evenly fed into the mill After being ground in the machine, it is sent to the rotary kiln for calcination. During calcination, carbon dioxide gas is introduced into the gas seal device 7 of the feed pipe, and then the carbon dioxide gas is delivered to the gas seal chamber 10 of the kiln head gas seal device 4 by the gas supply device 6. In the gas seal cavity 10 of the kiln tail gas seal device 5, carbon dioxide gas above atmospheric pressure is formed to prevent air from entering the rotary kiln to create...

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Abstract

The invention discloses an improved rotary kiln and a method for producing cement and a by-product yellow phosphorus or phosphoric acid. According to the improved rotary kiln, a rotary kiln system which is sealed by air is composed of a kiln head air seal device, a kiln tail air seal device, a kiln head hood shell, a kiln tail hood shell and a rotary kiln barrel. Phosphorus-containing ore, silica and anthracite are mixed by virtue of the improved rotary kiln according to a cement production formula, and then are ground, mixed evenly and put into production. Air is prevented from entering inside the kiln by manufacturing an oxygen-free environment in the kiln; elemental phosphorus is prevented from being oxidized; the by-product yellow phosphorus or phosphoric acid is successfully produced when cement production is achieved. Compared with an electric furnace process, the production cost of the yellow phosphorus can be reduced by over 80%; the power consumption is reduced by about over 170 times (excluding power consumption for cement production).

Description

technical field [0001] The invention relates to the fields of phosphorus chemical industry and building material production, in particular to a method for improving a rotary kiln and producing cement by-product yellow phosphorus or phosphoric acid. Background technique [0002] Slime clinker is a semi-finished product obtained by using limestone, clay, and iron as the main raw materials, which are prepared into raw meal in an appropriate proportion, burned until part or all of it is melted, and cooled. In the cement industry, the most commonly used Portland cement clinker is mainly composed of calcium oxide, silicon dioxide and a small amount of aluminum oxide and iron oxide. The main mineral composition is tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium aluminoferrite. Portland cement clinker and appropriate amount of gypsum are ground together to form Portland cement. [0003] But now there are some problems in cement production: [0004] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B7/00F27B7/24F27B7/32F27B7/36C01B25/027C01B25/18
Inventor 时朝友叶亚文
Owner 四川金磷硅谷科技有限公司
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