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Treatment method and equipment for high phosphorus haematite mineral processing acid wastewater

A technology for acid wastewater and treatment equipment, which is applied in the directions of water/sewage multi-stage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. Short running cycle of the agent and other problems, to achieve the effect of online circulation and efficient utilization of resources, good phosphorus removal effect, and good solid-liquid separation effect

Inactive Publication Date: 2009-05-06
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Natural materials and waste residues are readily available, inexpensive, and vary in adsorption capacity. The disadvantage is that the replacement cost of the adsorbent is usually high
Moreover, the general phosphorus adsorption capacity of adsorbents is not high enough at present, and the operating cycle of adsorbents is also relatively short.

Method used

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  • Treatment method and equipment for high phosphorus haematite mineral processing acid wastewater

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] A kind of treatment method of high phosphorus hematite beneficiation acidic waste water, it comprises the steps:

[0031] 1) Preparation of modified red mud:

[0032] (1) Dry the red mud in a drying oven at 90°C for 2 hours, then crush it (crushed with a mortar) and pass it through a 20-mesh sieve, and take the under-sieved material (as the object of modification) to obtain red mud powder for later use;

[0033] (2) According to red mud powder: hydrochloric acid = 40g: 1L, select red mud powder and hydrochloric acid, wherein the mass concentration of hydrochloric acid is 5%; put red mud powder in hydrochloric acid, fully stir in a water bath at 60°C for 1 hour, After cooling, the mixture is obtained;

[0034] (3) Add ammonia water to the mixed solution and stir, adjust the pH to 7.5, and let stand (so that the suspended matter in the mixed solution is fully precipitated); pour out the supernatant, and wash the precipitated substance with distilled water 5 times (to rem...

Embodiment 2

[0041] A kind of treatment method of high phosphorus hematite beneficiation acidic waste water, it comprises the steps:

[0042] 1) Preparation of modified red mud:

[0043] (1) Dry the red mud in a drying oven at 100°C for 2.5 hours, then crush it (crushed with a mortar) and pass it through a 20-mesh sieve, and take the material under the sieve (as the object of modification) to obtain red mud powder for later use;

[0044] (2) According to red mud powder: hydrochloric acid = 50g: 1L, select red mud powder and hydrochloric acid, wherein the mass concentration of hydrochloric acid is 7%; put red mud powder in hydrochloric acid, fully stir in a water bath at 80°C for 1.5h , to obtain a mixed solution after cooling;

[0045] (3) Add ammonia water to the mixed solution and stir, adjust the pH to 8.0, and let it stand (so that the suspended matter in the mixed solution is fully precipitated); pour out the supernatant, and wash the precipitated substance with distilled water 7 tim...

Embodiment 3

[0051] A kind of treatment method of high phosphorus hematite beneficiation acidic waste water, it comprises the steps:

[0052] 1) Preparation of modified red mud:

[0053] (1) Dry the red mud in a drying oven at 90-105°C for 2-3 hours, then crush it (crushed with a mortar) and pass through a 20-mesh sieve, and take the under-sieved material (as the object of modification) to obtain red mud powder, spare;

[0054] (2) According to red mud powder: hydrochloric acid = 40g ~ 60g: 1L, select red mud powder and hydrochloric acid, wherein the mass concentration of hydrochloric acid is 5 ~ 10%; put red mud powder in hydrochloric acid, in 60 ~ 100 ℃ water bath Fully stir in the pot for 1-2 hours, and get the mixed solution after cooling;

[0055] (3) Add ammonia water to the mixed solution and stir, adjust the pH to 7.5-8.5, and let it stand (so that the suspended matter in the mixed solution is fully precipitated); pour out the supernatant, and wash the precipitated substance with...

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Abstract

The invention relates to a method for treating wastewater and equipment thereof. A method for treating acid wastewater generated during high phosphorus hematite ore dressing is characterized in comprising the following steps: 1)a step of preparation of modified red mud is prepared, which comprises the following sub-steps: (1) red mud is dried, crushed and passed through a 20-mesh sieve to obtain red mud powder; (2) according to a red mud powder to hydrochloric acid ratio of between 40 to 60g:1L, the red mud powder is added into the hydrochloric acid, fully stirred in a water bath pot at 60 to 100 DEG C for 1 to 2 hours and cooled to obtain a mixed solution, and (3) the mixed solution is added with ammonia water with stirring, subjected to adjustment pH value to between 7.5 and 8.5 and keeps stand; and the obtained precipitate is washed with distillate water, dried, crushed, passed through a 60-mesh sieve to obtain the modified red mud; and 2) according to a principle of 6 to 23 grams of modified red mud for per litter of acid wastewater generated during the high phosphorus hematite ore dressing, modified red mud is added into a coagulative precipitation tank containing acid wastewater generated during the high phosphorus hematite ore dressing and stirred for 1 to 2 hours to obtain mud-water mixed liquid; and the mud-water mixed liquid flows to a dynamic membrane reactor to obtain reusable acid purified water. The method has the characteristics of good treatment effect, simple process operation, high water flux, low cost, short treatment period, etc.

Description

technical field [0001] The invention relates to a wastewater treatment method and equipment thereof. Background technique [0002] Hematite is one of the widely distributed iron minerals in nature, and its phosphorus content is generally high. High-phosphorus hematite ore beneficiation acidic wastewater is the acidic phosphorus-containing wastewater produced in the iron ore chemical beneficiation process. In recent decades, due to the fact that many mineral processing acidic phosphorus-containing waste liquids (such as high-phosphorus hematite mineral processing acidic wastewater) have not been effectively treated, they have been directly discharged into lakes, rivers, coastal waters and open seas in large quantities, resulting in serious pollution of water bodies. Increase the nutrient load of the water body, destroy the aquatic ecological balance, cause the sensory performance of the water body to deteriorate, the self-purification ability to weaken, the water quality to ...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F1/28
Inventor 夏世斌张一敏张义鲁双月
Owner WUHAN UNIV OF TECH
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