CN1289433C

CN1289433C - Efficien SO4 2- removing agent and its production method

Info

Publication number: CN1289433C
Application number: CN 200510040069
Authority: CN
Inventors: 李龙海; 解彦刚; 王玉春; 盛祥; 朱红力
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2005-05-18
Filing date: 2005-05-18
Publication date: 2006-12-13
Anticipated expiration: 2025-05-18
Also published as: CN1709825A

Abstract

The present invention relates to an SO4<2-> remover with high efficiency, and a preparation method thereof. The method comprises the following steps that more than five grades of bauxite ore and limestone are pulverized, sieved with a 200-mesh sieve, fully and uniformly mixed according to a weight proportion of (1:2)to (1:4), calcined at a high temperature of 1360 to 1400 DEG C, quickly cooled after being taken out of a furnace, and pulverized into less than 200 meshes after being cooled, and the alumina in the bauxite ore and the Calcium carbonate in the limestone are calcined. The present invention has the advantages of wide sources of the raw materials, low price, short flow of the production technology, easy operation, good hydration flocculability of water processing agent, and wide application range; flocculating precipitates can be recovered and used as raw materials for cement production, and have no secondary pollution.

Description

A kind of efficient SO 42-Remover and production method thereof

Technical field

The invention belongs to scavenging agent field used in the water treatment industry, refer in particular to a kind of efficient SO ₄ ^2-Remover and production method, this treatment agent product is mainly used in domestic water, the purifying treatment of process water and waste water.

Background technology

Along with development of industry and agriculture, the discharging of a large amount of undressed sanitary sewages, basin non-point source trade effluent etc., the Freshwater resources of China are more and more deficienter, especially in western part of China, because a large amount of down-hole waste water of coal mining enterprise's discharging, make SO in the water body ₄ ^2-, F-, NO ₂-wait negatively charged ion and heavy metal ion to exceed standard, people's drinking water source is subjected to bigger threat, handles the healthy of bad direct harm people.

Process is consulted domestic water treatment technology aspect, and domestic existing relevant SO is found in the research of pertinent literature ₄ ^2-The technology of remover has following several:

＜1〉belong to the flocculation agent aspect of pharmaceutical chemicals, class such as polymerize aluminum chloride, polymeric ferric salt, polymer aluminium silicate etc. have been characterized in good throwing out, can effectively remove suspended particle in the water body and colourity etc., reduce COD, but for SO in the water body ₄ ^2--removal effect is bad.

＜2〉belong to the electrochemistry aspect, class such as osmosis, reverse osmosis, electric floating, ion-exchange etc., though removal effect is more satisfactory, its technical requirements height, costing an arm and a leg makes these methods not to be extensive use of.

＜3〉domestic have a patent application 97116888.1, and it adopts bauxite and Wingdale is raw material, mixed by weight 3: 6, generate through twice calcining of low temperature, firing temperature is 700 ℃, and firing time needs 3-8 hour approximately. this treatment agent effect is better, but it is complicated that sintering technology shows, and the time is longer.

Summary of the invention

The purpose of this invention is to provide a kind of SO efficiently ₄ ^2-Remover, the flow process that simplifies the operation effectively reduces cost. and this remover cooperates corresponding treatment process and working method, to the SO in the water body ₄ ^2-Extraordinary removal effect is arranged, can reach the standard of the tap water of national regulation after the processing, simultaneously to F ^-, NO ₂ ^-, Cl ^-, Cr, Mo, Se, As, organic acid ion and heavy metal ion etc. also have treatment effect preferably.

Realize that technical scheme of the present invention is:

＜1〉be a kind of by the bauxitic ore and the Wingdale that adopt more than the Pyatyi, by weight 1: 2～1: 4 proportioning, through the inorganic complex that high-temperature calcination generates, its main composition was Ca ₃Al ₂O ₆, Ca ₄Al ₂O ₇, Ca ₁₂Al ₁₄O ₃₃, its total content 〉=60%.

＜2〉its production method is as follows:

Raw material adopts the above bauxitic ore of Pyatyi, its Al ₂O ₃Content 〉=58%, Al/Si 〉=4, at first above-mentioned bauxitic ore and limestone powder are broken to by 200 mesh sieves, even according to 1: 2～1: 4 proportioning thorough mixing of weight ratio, under 1360 ℃～1400 ℃ high temperature, calcine 1.5h～2h, carry out chilling after coming out of the stove, be crushed to after cooling below 200 orders, at this moment aluminum oxide (the Al in the bauxitic ore ₂O ₃) with Wingdale in lime carbonate (CaCO ₃) after calcining, generated a kind of inorganic complex that contains aluminium, calcium ion, be efficient SO ₄ ^2-Remover.

This remover in water after fully stirring aquation and with water body in SO ₄ ^2-Form stable indissoluble thing, good flocculation sediment effect is arranged simultaneously.

Advantage of the present invention and effect:

This efficient SO ₄ ^2-The technological process of production of remover is simple, easy and simple to handle, the processing parameter that is adopted requires low, production time is short, and relative cost is very cheap. can aquation after this remover adds in the entry and throwing out is arranged, can interact with negatively charged ion, heavy metal ion in the water simultaneously, form stable indissoluble thing, and with the flco precipitation, thereby make water quality be purified, reach drinking water standard.

Embodiment

Below be embodiments of the invention:

Embodiment 1:

With the above bauxite (Al of Pyatyi ₂O ₃Content 68%, SiO ₂Content 14%) and Wingdale separated pulverizing to 200 order carry out thorough mixing by 1: 4 weight ratio, 1360 ℃ temperature lower calcinations 1.5 hours, come out of the stove to be chilled to normal temperature and to be crushed to 200 orders and promptly produce efficient S0 ₄ ^2-Remover.The bittern of sulphate-containing ion concentration 4500mg/L adds this efficient remover 4 grams after Calx preconditioning, can make that sulfate ion concentration is reduced to 202mg/L in the water.

Embodiment 2:

With the above bauxite (Al of Pyatyi ₂O ₃Content 68%, SiO ₂Content 14%) and Wingdale separated pulverizing to 200 order carry out thorough mixing by 1: 2.5 weight ratio, at 1400 ℃ of temperature lower calcinations after 1.5 hours, come out of the stove be chilled to normal temperature and be crushed to 200 orders after packing be efficient SO ₄ ^2-Remover, these efficient remover 3 grams add in the waste water of mine of Shanxi sulfur-bearing acid group 565mg/L the treated 50mg/L that is reduced to.

Embodiment 3:

With the above bauxite (Al of Pyatyi ₂O ₃Content 64%, SiO ₂Content 11%) and Wingdale separated pulverizing to 200 order carry out thorough mixing by 1: 2 weight ratio, at 1380 ℃ temperature lower calcinations after 1.5 hours, coming out of the stove is chilled to normal temperature and is crushed to 200 orders and promptly produces efficient SO ₄ ^2-Remover, this efficient remover 4g adds in the Zhenjiang power plant river on every side, and sulfur-bearing acid group 700mg/L can be reduced to 30mg/L after the processing in the river.

Embodiment 4:

With the above bauxite (Al of Pyatyi ₂O ₃Content 58%, SiO ₂Content 12%) and Wingdale separated pulverizing to 200 order carry out thorough mixing by 1: 3.5 weight ratio, at 1360 ℃ temperature lower calcinations after 2 hours, coming out of the stove is chilled to normal temperature and is crushed to 200 orders and promptly produces efficient SO ₄ ^2-Remover, this efficient remover 4g adds in the waste water of certain sulfur-bearing acid group 550mg/L, can be reduced to 100mg/L after treatment.

Embodiment 5:

With the above bauxite (Al of Pyatyi ₂O ₃Content 58%, SiO ₂Content 12%) and Wingdale separated pulverizing to 200 order carry out thorough mixing by 1: 2 weight ratio, at 1400 ℃ temperature lower calcinations after 2 hours, coming out of the stove is chilled to normal temperature and is crushed to 200 orders and promptly produces efficient S0 ₄ ^2-Remover, this efficient remover 3g adds in the waste water of mine of Shanxi sulfur-bearing acid group 565mg/L, can be reduced to 80mg/L after treatment.

Claims

1. efficient SO ₄ ^2-Remover is characterized in that being a kind of inorganic complex through the high-temperature calcination generation that its main composition is Ca ₃Al ₂O ₆, Ca ₄Al ₂O ₇, Ca ₁₂Al ₁₄O ₃₃, its total content 〉=60%.

2. according to the described efficient SO of claim 1 ₄ ^2-The production method of remover is characterized in that:

(1) raw material adopts the above bauxitic ore of Pyatyi, its Al ₂O ₃Content 〉=58%, Al/Si 〉=4 at first are broken to above-mentioned bauxite and limestone powder by 200 mesh sieves, and are even according to 1: 2～1: 4 proportioning thorough mixing of weight ratio;

(2) under 1360 ℃～1400 ℃ high temperature, calcine 1.5h～2h, carry out chilling after coming out of the stove;

(3) be crushed to below 200 orders after the cooling, can get efficient SO ₄ ^2-Remover.