CN1046642C

CN1046642C - Dry process processing caustic sludge to produce earth for earthwork

Info

Publication number: CN1046642C
Application number: CN95108024A
Authority: CN
Inventors: 乔希海
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-28
Filing date: 1995-06-28
Publication date: 1999-11-24
Anticipated expiration: 2015-06-28
Also published as: CN1139025A

Abstract

The present invention relates to a method for manufacturing engineering earth by treating alkali slag by a drying method, which belongs to the field of the comprehensive utilization of the waste slag liquid of sodium carbonate by an ammonia-soda method. In the method, after stacked alkali slag or directly discharged waste slag liquid is deposited, pressed and filtered, the alkali slag is coarsely ground, and is solarized and dried at normal temperature and pressure or is dried by a physical method for 24 h to 28 h so that the engineering earth is manufactured, and the dried finished product is pulverized to be used. The waste slag granular material can be formed by compacted by mixing with water by adding material such as yellow soil, pulverized coal ash, cement, returned sand and stone, quick lime, steel slag, etc. according to different compounding proportions. The method for treating the waste slag and newly discharged waste slag liquid by the drying method has simple technology; the waste slag granular material is gray ash so as to be freely matched with other kinds of material according to the requirements, and has wide application fields.

Description

Desiccating method is handled the method for producing engineering soil from alkaline slag

The present invention relates to solvay soda process and produce the comprehensive utilization of waste residue in the soda ash process.

The a large amount of waste residue liquids of discharging are to perplex the hang-up that solvay soda process soda ash is produced for a long time in the solvay soda process soda ash production process, bulk deposition not only accounted for soil but also contaminate environment, also will spend a large amount of maintenance costs every year, the utilization research of alkaline residue all is devoted to solve in the home and abroad for many years, though the method for existing multiple solution alkaline residue, but because technology, problems such as cost are improved as yet fully or treatment capacity can not solve alkaline residue very little at all and stores up and continue emission problem, the applicant uses simple method in the Chinese patent " method of producing engineering soil from alkaline slag " (application number 95106293.3) of 95.6.3 application, reached the purpose of a large amount of processing storing caustic sludges and new discharging waste residue liquid, this method mainly is to handle alkaline residue with the mechanical stirring method, because alkaline residue is to pile up all the year round, multiple scrap steel and brick are wherein arranged, there is the defective that easily makes whipping device block or damage in foreign material such as stone.

The object of the invention provides a kind of method that overcomes above-mentioned defective and handle producing engineering soil from alkaline slag than the simpler direct drying method of above-mentioned patent application scheme.

The present invention is this realization, with storing caustic sludge or directly discharge waste residue liquid and carry out coarse reduction through deposition, alkaline residue after the press filtration, being dried to water ratio is the block plain ash of 20-30%, the block plain ash of dried alkaline residue is crushed to particulate state, return stone sand return, 0-40% calcium oxide, 0-50% slag, 0-30% cement, 0-80% flyash batching with selection component (representing with weight percentage) 0-90% soil, 0-30% sand, 0-20% stone, 0-50% liquid slag, 0-40% calcium sulfate, 0-70%, the blunge compacting gets final product.

That described selection component can be selected for use is a kind of, two or more is used in combination, and can select collocation according to requirement of engineering.

Drying means of the present invention also can adopt other conventional dewaterings such as centrifuge dripping method etc. except that seasoning.

The present invention is simpler treatment process with the method for alkaline residue elder generation crushed after being dried, and the alkaline residue pellet of Chu Liing is plain ash like this, arranges in pairs or groups arbitrarily according to requirement of engineering with unclassified stores, can widen Application Areas.

The preparation of the plain ash of alkaline residue:

100kg storing caustic sludge coarse reduction back beach was shone 24 hours, or waste residue liquid put in the bucket deposition 2 hours, get underflow with small-sized pressure filter press filtration, product beach after the press filtration shone 48 hours, the block plain ash of drying is crushed to 2mm-5cm, arrange in pairs or groups with the different choice composition, add the compacting of suitable quantity of water mix, the batching of different instances when unconfined compression strength is routine as follows, and dosage is represented with weight percentage, but example of the present invention is not limited to down column data.

The plain ash 70% of example 1 alkaline residue, soil 30%, finished product unconfined compression strength (following example abbreviation intensity) 0.2MPa;

The plain ash 90% of example 2 alkaline residues, sand 10%, intensity 0.2MPa;

The plain ash 90%6 of example 3 alkaline residues, stone 10%, intensity 0.3MPa;

The plain ash 80% of example 4 alkaline residues, liquid slag 20%, intensity 0.3MPa;

The plain ash 95% of example 5 alkaline residues, calcium sulfate 5%, intensity 0.2MPa;

The plain ash 60% of example 6 alkaline residues, return stone sand return 40%, intensity 0.3MPa;

The plain ash 90% of example 7 alkaline residues, calcium oxide 10%, intensity 0.3MPa;

The plain ash 60% of example 8 alkaline residues, slag 40%, intensity 0.4MPa;

The plain ash 85% of example 9 alkaline residues, cement 15%, intensity 0.4MPa;

The plain ash 80% of example 10 alkaline residues, flyash 20%, intensity 0.2MPa;

The plain ash 85% of example 11 alkaline residues, cement 5%, flyash 10%, intensity 0.3MPa;

Claims

1. a desiccating method is handled the method for producing engineering soil from alkaline slag, and it is with storing caustic sludge or directly discharges the alkaline residue of waste residue liquid through deposition, after filtering as raw material, it is characterized in that with after the above-mentioned alkaline residue coarse reduction being dried to water ratio is the block plain ash of 20-30%.

2. handle the method for producing engineering soil from alkaline slag according to the described desiccating method of claim 1, it is characterized in that the block plain ash of dried alkaline residue is pulverized, return stone sand return, 0-40% calcium oxide, 0-50% slag, 0-30% cement, 0-80% flyash batching with selection component (representing with weight percentage) 0-90% soil, 0-30% sand, 0-20% stone, 0-50% liquid slag, 0-40% calcium sulfate, 0-70%, the blunge compacting gets final product.