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

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] ...

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)

Images