Stone coal acidic waste water resource utilization method

A technology for acid wastewater and recycling, applied in chemical instruments and methods, applications, water/sewage treatment, etc., can solve the problems of low equipment investment, low cost, and consideration of the overall composition of wastewater, and achieve zero discharge, low cost, The effect of efficient separation and recovery

Active Publication Date: 2018-10-19
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above chemical precipitation and crystallization methods are low in cost and less in equipment investment, but they only remove one type of component in the wastewater, without considering the overall composition of the wastewater, and have not effectively recovered valuable components.

Method used

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  • Stone coal acidic waste water resource utilization method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] This embodiment provides a method for resource utilization of stone coal acid waste water, the main components and concentrations of the stone coal acid waste water are respectively: Na + 5.16g / L, K + 0.56g / L, NH 4 +1.75g / L, Mg 2+ 1.82g / L, SO 4 2- 8.92g / L. In addition, the stone coal acid wastewater also includes: vanadium 0.055g / L, chromium 0.0032g / L, nickel 0.0044g / L, copper 0.021g / L, cobalt 0.0039g / L, cadmium 0.0013g / L L, arsenic 0.0002g / L, zinc 0.083g / L, iron 0.086g / L, aluminum 0.023g / L, described method comprises the following steps:

[0093] (1) Selective recovery of heavy metals from stone coal acid wastewater through nitrogen-containing chelating resin adsorbent to obtain heavy metal enrichment and solution, the concentration of vanadium, chromium, nickel, copper, cobalt, cadmium, zinc, iron and aluminum in the solution are less than 0.1ppm, and the heavy metal enrichment is separated and recovered according to the existing process;

[0094] (2) Return th...

Embodiment 2

[0098] This embodiment provides a method for resource utilization of stone coal acid wastewater. The components and concentrations in the stone coal acid wastewater refer to Example 1. The method includes the following steps:

[0099] (1) Selectively recover heavy metals from stone coal acid wastewater through sulfide precipitant to obtain heavy metal enrichment and solution. The concentrations of vanadium, chromium, nickel, copper, cobalt, cadmium, zinc, iron and aluminum in the solution are all less than 0.1 ppm, the heavy metal enrichment is separated and recovered according to the existing process;

[0100] (2) The solution obtained in step (1) is returned to the stone coal leaching process, and a high-concentration saline solution is obtained through multiple cycles of leaching enrichment, and each ion concentration in the high-concentration saline solution is Na + 15.24g / L, K + 1.36g / L, Mg 2+ 12.33g / L, NH 4 + 4.97g / L, add ammonium bisulfate and magnesium bisulfate to...

Embodiment 3

[0104] This embodiment provides a method for resource utilization of stone coal acid wastewater. The components and concentrations in the stone coal acid wastewater refer to Example 1. The method includes the following steps:

[0105] (1) Selective recovery of heavy metals from stone coal acid wastewater through oxygen-containing and sulfur-containing chelating resin adsorbents to obtain heavy metal enrichment and solutions, in which vanadium, chromium, nickel, copper, cobalt, cadmium, zinc, iron and The concentration of aluminum is less than 0.1ppm, and the heavy metal enrichment is separated and recovered according to the existing technology;

[0106] (2) The solution obtained in step (1) is returned to the stone coal leaching process, and a high-concentration saline solution is obtained through multiple cycles of leaching enrichment, and each ion concentration in the high-concentration saline solution is Na + 126.46g / L, K + 23.83g / L, Mg 2+ 42.89g / L, NH 4 + 70g / L, adding...

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Abstract

The invention provides a stone coal acidic waste water resource utilization method. The method comprises the steps of heavy metal recovery, salt enrichment, magnesium nitrogen complex salt crystallization, ihleite precipitation, tail water circular treatment and the like. Stone coal acidic waste water is firstly separated to recover heavy metal ions; then, magnesium and nitrogen complex salt and ihleite are respectively obtained by a multi-step crystallization method; the efficient separation and recovery of different ingredients in waste water are realized; the problems of recovery incapability of valuable ingredients and generation of a large amount of waste slag by a traditional waste water neutralization deamination method are avoided; various kinds of products with high additional values are obtained; the product purity is high; no heavy metal is entrained; after the treatment, the waste water returns to a stone coal leaching working procedure; the zero discharge of the waste water is realized. The method has the advantages that the cost is low; the operation is simple; the clean and environment-friendly effects are achieved, and the like.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment and resource utilization, and relates to a method for resource utilization of acidic waste water from stone coal. Background technique [0002] Stone coal is a vanadium-containing polymetallic mineral resource and one of the main raw materials for extracting vanadium. Besides vanadium, stone coal often contains aluminum, potassium, iron, calcium, magnesium, molybdenum, nickel, cobalt, copper, Titanium, chromium, uranium, selenium and other associated elements. Roasting-water leaching / acid leaching and direct acid leaching are common vanadium extraction processes for stone coal, so these processes will produce a large amount of acidic wastewater. The use of additives in the roasting process, stripping agent / desorbent in the vanadium enrichment process, precipitant in the vanadium precipitation process, and the leaching of various associated elements in the leaching process will cause...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C22B7/00C22B34/22C22B34/32C22B23/00C22B15/00C22B19/20C22B17/00C05G1/00
CPCC02F1/285C02F1/286C02F1/58C02F1/586C02F1/62C02F9/00C05C3/00C22B7/006C22B15/0084C22B17/04C22B19/26C22B23/0453C22B34/22C22B34/32C05D5/00Y02P10/20
Inventor 董玉明李会强张笛裴丽丽张红玲徐红彬张懿
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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