Acidolysis laterite nickel ore wastewater treatment and slag utilization method

A technology for the treatment of laterite nickel ore and wastewater, which is applied in mining wastewater treatment, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of acid hydrolysis of nickel ore wastewater polluting environmental resources, etc., and achieves a simple and easy wastewater treatment process. Project implementation, good effect

Inactive Publication Date: 2014-01-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for the treatment of acidolysis nickel ore wastewater and the utilization method of slag, which is a method for the comprehensive utilization of acidolysis nickel ore wastewater to solve the pollution of the environment and the comprehensive utilization of resources by acidolysis nickel ore wastewater question

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  • Acidolysis laterite nickel ore wastewater treatment and slag utilization method

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Embodiment 1

[0028] Example 1: The method for the treatment of waste water of acidolysis laterite nickel ore and the utilization method of slag, the specific operation is as follows:

[0029] 1. Raw material processing and preparation

[0030] (1) Pretreatment of acid-decomposed laterite-nickel ore wastewater: Continuously inject compressed air into the acid-lysis laterite-nickel ore wastewater (magnesium ion concentration is 20g / L), and stop the exposure when the color of the wastewater turns from colorless to brown. Air, the aeration time is 2.0h, and the aeration liquid is obtained;

[0031] (2) Preparation of acid hydrolysis nickel ore wastewater treatment agent: first, high-calcium fly ash (in which CaO+MgO content is greater than 45%, SO 3 Content 6%, SiO 2 +Al 2 o 3 CaO content is 25%) dry grinding into 0.045mm sieve 18% powder material, calcium carbide slag (in which the CaO content is 71%) is press-filtered into a semi-solid with a moisture content of 50%; then the high calc...

Embodiment 2

[0043] Embodiment 2: the utilization method of acidolysis laterite nickel ore waste water treatment and slag, concrete operation is as follows:

[0044] 1. Raw material processing

[0045] (1) Pretreatment of acid-lysis laterite-nickel ore wastewater: Continuously inject compressed air into the acid-lysis laterite-nickel ore wastewater (magnesium ion concentration is 25g / L), and stop the exposure when the color of the wastewater turns from colorless to brown. Air, the aeration time is 2.5h, and the aeration liquid is obtained;

[0046] (2) Preparation of acid hydrolysis nickel ore wastewater treatment agent: first, metal magnesium smelting slag (in which the content of CaO+MgO is 47%, Si0 2 +Al 2 o 3 32%) dry powder material with a 0.045mm sieve residue of 16%, calcium carbide slag (in which the CaO content is 65%) is press-filtered to become a semi-solid with a moisture content of 40%; then the metal magnesium smelting slag and calcium carbide The slag is mixed in a rati...

Embodiment 3

[0055] Example 3: The method for the treatment of waste water of acidolysis laterite nickel ore and the utilization method of slag, the specific operation is as follows:

[0056] 1. Raw material processing

[0057] (1) Pretreatment of acid-decomposed laterite-nickel ore wastewater: Continuously inject compressed air into the acid-lysis laterite-nickel ore wastewater (magnesium ion concentration is 30g / L), and stop the exposure when the color of the wastewater turns from colorless to brown. Air, the aeration time is 3h, and the aeration liquid is obtained;

[0058] (2) Preparation of acidolysis nickel ore wastewater treatment agent: first steel slag (carbon steel slag or / and stainless steel slag, in which CaO+MgO content is 64%, SiO 2 +Al 2 o 3 23%) dry grinding to become a 0.045mm sieve powder material with a sieve residue of 16%, carbide slag (in which the CaO content is 69%) is press-filtered to become a semi-solid with a moisture content of 40%; then the steel slag and...

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Abstract

The invention discloses an acidolysis laterite nickel ore magnesium-containing wastewater treatment and slag utilization method, and belongs to the technical field of hydrometallurgy and environmental protection. The main process of the method is as follows: firstly performing aeration treatment on acidolysis nickel ore wastewater; then adding a wastewater treatment agent which comprises the main ingredients of high-calcium fly ash, magnesium smelting slag, steel slag, carbide slag and lime; and obtaining two components, namely treated water and slag through stirring, ageing and filtering, wherein the water is reused in a production process, and the slag becomes a raw material of magnesite cement after being subjected to drying or low-temperature calcination and grinding. According to the method, the raw material cost is low, the water treatment effect is good, and the resource utilization of the acidolysis laterite nickel ore magnesium-containing wastewater is realized.

Description

technical field [0001] The invention relates to a method for treating waste water of acidolysis laterite nickel ore and utilizing slag, belonging to the technical fields of hydrometallurgy and environmental protection. Background technique [0002] Nickel is an important non-ferrous metal with a wide range of uses. It mainly occurs in nature as nickel sulfide ore and nickel oxide ore. 30% of nickel resources are sulfide ore and 70% are laterite nickel ore. With the increasing demand for nickel and the gradual depletion of nickel sulfide ore, the development of laterite nickel ore is developing vigorously. Practice has proved that wet nickel extraction is an effective method to utilize laterite nickel ore. The main process is: laterite nickel ore undergoes wet grinding and pulping, and sulfuric acid is added under stirring to convert nickel oxide in nickel ore into nickel sulfate. Aqueous solution, and then use sodium sulfide or magnesium oxide to deposit nickel to obtain ni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/00C02F1/66C02F1/28C02F1/52C04B7/153C02F1/74C02F103/10
CPCY02P40/10
Inventor 张召述夏举佩刘艳娜王金博
Owner KUNMING UNIV OF SCI & TECH
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