阅读说明：本技术 一种防氧化阻隔材料及其制备方法与应用 (A kind of anti-oxidation barrier material and the preparation method and application thereof ) 是由 黄建洪 陈允建 田森林 胡学伟 赵群 李英杰 于 2019-08-19 设计创作，主要内容包括：本发明公开了一种防氧化阻隔材料及其制备方法与应用,所述防氧化阻隔材料包括尾矿、硅铝平衡剂及碱激发剂,质量比为2~6:2:1。防氧化阻隔材料的制备方法是先将尾矿研磨,再向研磨处理后的尾矿中加入硅铝平衡剂并混合均匀,再加入碱激发剂并混合均匀,得泥状物,即可。所述应用为在尾矿库防氧化处理中的应用,所述防氧化阻隔材料均匀覆盖在尾矿库表面,形成防氧化阻隔层,厚度为3~5cm。本发明实现将尾矿与外界水分和空气隔离,防止水中和空气中的氧气与硫化物成分接触,从根源上防止尾矿的氧化过程；本发明全部利用固废原材料,且主材料为原地取材,工程应用只需承担人工和些许机械成本,经济投入极低。(The invention discloses a kind of anti-oxidation barrier material and the preparation method and application thereof, the anti-oxidation barrier material includes tailing, sial poising agent and alkali-activator, and mass ratio is 2 ~ 6:2:1.The preparation method of anti-oxidation barrier material is first to grind tailing, then sial poising agent is added into the tailing after milled processed and is uniformly mixed, adds alkali-activator and is uniformly mixed, and obtains purees.The application is the application in the anti-oxidation processing of Tailings Dam, and the anti-oxidation barrier material uniform fold forms anti-oxidation barrier layer, on Tailings Dam surface with a thickness of 3 ~ 5cm.The present invention realizes that the oxygen for preventing tailing and outside moisture and air insulated water to neutralize in air is contacted with sulfide composition, prevents the oxidation process of tailing from the root；The present invention is all of solid waste raw material, and main material is original place materials, and engineer application need to only undertake artificial and a little machine cost, and economic input is extremely low.)

1. a kind of anti-oxidation barrier material, it is characterised in that including tailing, sial poising agent and alkali-activator, mass ratio is 2 ~ 6: 2:1。

2. anti-oxidation barrier material according to claim 1, it is characterised in that including tailing, sial poising agent and alkali-activated carbonatite Agent, mass ratio are 3 ~ 5:2:1.

3. anti-oxidation barrier material according to claim 1 or claim 2, it is characterised in that the fineness modulus of the tailing less than 3.0, The fineness modulus is calculated by following formula:

MX=[(A0.15+A0.3+A0.6+A1.18+A2.36) -5A4.75]/(100-A4.75),

Wherein MX is fineness modulus, and A0.15 is particle accumulated retained percentage on partial size 0.15mm, and A0.3 is on partial size 0.30mm Particle accumulated retained percentage, A0.6 are particle accumulated retained percentage on partial size 0.60mm, and A1.18 is partial size 1.18mm Shang Grain accumulated retained percentage, A2.36 are particle accumulated retained percentage on partial size 2.36mm, and A4.75 is partial size 4.75mm Shang Grain accumulated retained percentage.

4. anti-oxidation barrier material according to claim 1 or claim 2, it is characterised in that the sial poising agent includes silicon ash, powder Coal ash, mass ratio are 1:2.5 ~ 3.5.

5. anti-oxidation barrier material according to claim 1 or claim 2, it is characterised in that the alkali-activator is red mud solution, dense Degree is not less than 10g/L.

6. a kind of preparation method of the anti-oxidation barrier material any according to claim 1 ~ 5, it is characterised in that first by tailing Grinding, then sial poising agent is added into the tailing after milled processed and is uniformly mixed, adds alkali-activator and is uniformly mixed, Obtain purees.

7. a kind of application of anti-oxidation barrier material any according to claim 1 ~ 5 in the anti-oxidation processing of Tailings Dam, It is characterized in that the anti-oxidation barrier material uniform fold forming anti-oxidation barrier layer on Tailings Dam surface, with a thickness of 3 ~ 5cm。

8. applying according to claim 7, it is characterised in that further include maintenance, after the maintenance is covering, under normal temperature condition Rain-proof and stand at least 5 days.

Technical field

The invention belongs to tailings glass technical fields, and in particular to a kind of anti-oxidation barrier material and preparation method thereof with answer With.

Background technique

Mill tailings always is one of intractable problem, is the pollution sources for causing great environmental problem.According to statistics, in More than 1500 of the existing large-capacity tailing reservoirs of state such as add various small-scale tailing ponds, total over 10,000.Its harmfulness is prominent Show acid tailing draining, vegetation deterioration, land deterioration, desertification and dust pollution, water pollution etc..Acid percolate It is oxygen sustained response in sulfur-bearing tailing and air, forms sulfuric acid under rainwater effect, causes tailing percolate pH in acidity (pH =2-4), and the oxidation of duration, and then the generation acid waste water of duration can occur with the time for the sulfide in tailing. Other associated metals in tailing can be made to dissolve out, such as Hg, Pb, As, Cd, downstream environment is polluted.By taking pyrite as an example, acid Property waste water formed chemism it is as follows:

It is valuable secondary mineral resources mostly containing various coloured, black, dilute expensive, rare earth and nonmetallic mineral etc. in tailing, Need further to be developed, recycle.And the oxidation of tailing produces the dissolution that acid not only results in valuable metal, can also cause to environment Heavy burden.There are not generally approval and ideal method also in the processing in tailingspile at present, mainly there is lye to neutralize, Dystopy processing reduces tailing quantity in stock with tailings utilization construction material, but these methods can only obtain effect for the moment, The problem of oxidation of tailing cannot fundamentally be solved.

The problem of oxidation in processing tailingspile library at present mainly has Passivation Treatment, chemical neutralisation, physical isolation method and plant Repair etc., such as a kind of method (CN106623354B) of live in-situ conservation powdery metal sulfide tailing, a kind of layering Cover gold mine tailings ecological restoring method (CN109731903A), these method common problems be input cost height and Effect is poor when long, solves the problems, such as that tailing exists when cannot be thorough, long.In view of the above problems, find it is a kind of it is easy, at low cost, The good product of effect just becomes the task of top priority.

Summary of the invention

The first object of the present invention is to provide a kind of anti-oxidation barrier material.

The second object of the present invention is to provide a kind of preparation method of anti-oxidation barrier material.

The third object of the present invention is to provide a kind of application of anti-oxidation barrier material in the anti-oxidation processing of Tailings Dam.

The first object of the present invention is achieved in that including tailing, sial poising agent and alkali-activator, mass ratio is 2 ~ 6:2:1。

The second object of the present invention is achieved in that and first grinds tailing, then is added into the tailing after milled processed Sial poising agent is simultaneously uniformly mixed, and is added alkali-activator and is uniformly mixed, obtains purees.

The third object of the present invention is achieved in that the anti-oxidation barrier material uniform fold in Tailings Dam table Face forms anti-oxidation barrier layer, with a thickness of 3 ~ 5cm.

Compared with prior art, the present invention has following technical effect that

1, the anti-oxidation barrier material of the present invention is prepared by tailing, sial poising agent and alkali-activator proportion, utilizes high pH Under the conditions of OH^-The Si-O key in silica-aluminum materials network structure can be made to be broken rapidly, thus dissolve Si-rich phase quickly, meanwhile, Some aluminium for replacing silicon present in Si-rich phase can also dissolve, and regroup, and final quickly formation hardness is higher, seeps water The lower hardening barrier layer of coefficient, realize tailing and outside moisture and air insulated are prevented water neutralize the oxygen in air and Sulfide composition contact, prevents the oxidation process of tailing from the root；

2, the anti-oxidation barrier material of the present invention is all of solid waste raw material, and main material is original place materials, and engineer application only needs Artificial and a little machine cost is undertaken, economic input is extremely low；

3, the anti-oxidation barrier material of the present invention uses red mud solution as alkali-activator, and the alkalinity of red mud is both effectively utilized, Solid waste resource rationally is utilized, alleviates red mud itself to the pressure of environment, and due to the particularity of red mud, indissoluble in lattice Sustained release alkali out can be used as Tailings Dam it is long when acid-base buffer agent；

4, the anti-oxidation barrier material of the present invention is in the anti-oxidation processing of Tailings Dam in application, being not necessarily to High Temperature Curing, it is only necessary to room temperature Anti- water curing can be formed, and process flow is simplified, and reduce maintenance cost；Anti-oxidation barrier material is formed on Tailings Dam surface Anti-oxidation barrier layer, guarantee also to accomplish high rigidity while hypotonic water coefficient, can both give Tailings Dam and be isolated for a long time Protection, can also above its barrier layer soil covering culture, while be conducive to carry out Tailings Dam ecological recovery, also have prevent poplar dirt With the effect for reinforcing old the library, mitigate the dust pollution as caused by Tailings Dam, reduces the library collapsing and threaten.

Specific embodiment

Below with reference to embodiment, the present invention is further illustrated, but the present invention is limited in any way, Based on present invention teach that it is made it is any transform or replace, all belong to the scope of protection of the present invention.

The present invention includes tailing, sial poising agent and alkali-activator, and mass ratio is 2 ~ 6:2:1.

Preferably, the anti-oxidation barrier material includes tailing, sial poising agent and alkali-activator, and mass ratio is 3 ~ 5:2: 1。

The reaction mechanism of anti-oxidation barrier material are as follows:

Chemical hydration reaction:

The reaction of physics electrostatic:

The polycondensation reaction that ion pair is mutually condensed:

。

Preferably, less than 3.0, the fineness modulus is calculated the fineness modulus of the tailing by following formula:

MX=[(A0.15+A0.3+A0.6+A1.18+A2.36) -5A4.75]/(100-A4.75),

Wherein MX is fineness modulus, and A0.15 is particle accumulated retained percentage on partial size 0.15mm, and A0.3 is on partial size 0.30mm Particle accumulated retained percentage, A0.6 are particle accumulated retained percentage on partial size 0.60mm, and A1.18 is partial size 1.18mm Shang Grain accumulated retained percentage, A2.36 are particle accumulated retained percentage on partial size 2.36mm, and A4.75 is partial size 4.75mm Shang Grain accumulated retained percentage.

Preferably, the sial poising agent includes silicon ash, flyash, and mass ratio is 1:2.5 ~ 3.5.

Preferably, the alkali-activator is red mud solution, and concentration is not less than 10g/L.

The preparation method of the anti-oxidation barrier material, first grinds tailing, then is added into the tailing after milled processed Sial poising agent is simultaneously uniformly mixed, and is added alkali-activator and is uniformly mixed, obtains purees.

Application of the anti-oxidation barrier material in the anti-oxidation processing of Tailings Dam, the anti-oxidation barrier material is uniform It is covered on Tailings Dam surface, anti-oxidation barrier layer is formed, with a thickness of 3 ~ 5cm.

Preferably, further include maintenance, rain-proof and stand at least 5 days after the maintenance is covering, under normal temperature condition.

Below with reference to 1 ~ embodiment of embodiment 42, the invention will be further described.