Production line and process for preparing sulphoaluminate cement by using white mud

Abstract

The invention relates to a production line and a process for preparing sulphoaluminate cement by using white mud, wherein the production line comprises a feeding device, a drying device, a calcining device, a heat collecting device, a dust removing device, a coal supply device, a burning device, and a milling device. According to the present invention, the sulphoaluminate cement is prepared by carrying out mixed calcining on white mud residue / carbide residue, industrial gypsum powder / natural gypsum powder, aluminum ash / aluminum raw material and a crystal nucleus agent. With the production lineand the process of the present invention, the white mud is eliminated so as to powerfully protect the beautiful natural ecological habitat of the local area; the recycling of renewable resources is accelerated, the waste is turned into treasure, the pollution is controlled, the environment is improved, the occupied land resources are released, the beautiful environment is created for people, andthe harmonic and uniform ecological environment for human and nature is promoted; the shortage of the special cement such as sulphoaluminate cement on the market is effectively alleviated, and the shortage of the short supply and demand in the domestic special cement market is overcome; and the heat generated in the production process can be fully recovered, and the work efficiency is improved.

Description

technical field [0001] The invention relates to the field of waste recycling, in particular to a production line and a process for preparing sulphoaluminate cement from white mud. Background technique [0002] There are two sources of white mud. One is that during the production of soda ash, a large amount of waste liquid will be produced in the process of making alkali with ammonia-soda method. The alkali residue produced after the waste liquid is filtered is commonly known as white mud. Another kind of black liquor produced in the papermaking and pulping production process is treated by alkali recovery technology, and lime is added to the green liquor for causticization reaction to obtain white sediment, which is white mud. The reaction of papermaking lime mud is as follows: [0003] Na 2 CO 3 + CaO+ H 2 O = 2NaOH + CaCO 3 ↓ [0004] Its main chemical components are: [0005] project CaO MgO Fe 2 o 3 Al 2 o 3 SiO 2 burn vector ...

AI Technical Summary

Problems solved by technology

[0011] The present invention provides a production line and process for preparing sulphoaluminate cement by using white mud, the main purpose of which is to overcome the defect that white mud cannot be used to produce sulphoaluminate cement in the prior art

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