A resource recovery and treatment method for smelting wastewater sedimentation slag

A technology of resource recovery and treatment method, applied in the field of solid waste treatment in the metallurgical industry, can solve the problems of poor adaptability of raw materials, low resource recovery rate, low production efficiency, etc., and achieve the effects of low production cost, simplified purification process and fast response

Active Publication Date: 2021-04-30
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional fire treatment process has problems such as high energy consumption, long time consumption, and environmental pollution, and gradually cannot meet the current environmental protection requirements; the traditional wet treatment process mainly has disadvantages such as poor adaptability of raw materials, metal dispersion, and low production efficiency.
At present, the treatment of vanadium smelting wastewater sedimentation slag generally refers to the traditional pyrotechnic process or wet process, which has the disadvantages of low resource recovery rate and high energy consumption.

Method used

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  • A resource recovery and treatment method for smelting wastewater sedimentation slag
  • A resource recovery and treatment method for smelting wastewater sedimentation slag
  • A resource recovery and treatment method for smelting wastewater sedimentation slag

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Effect test

Embodiment 1

[0029] The raw material vanadium smelting wastewater sedimentation slag treated in this example is the sedimentation slag produced after the vanadium smelting wastewater is treated by the combined chemical-coagulation process. It is provided by a domestic vanadium smelting enterprise. Its chemical composition is as follows, and the contents of each element are is the mass percent content.

[0030]

[0031] A method for resource recovery and treatment of vanadium smelting wastewater sedimentation slag, specifically including steps:

[0032] S1: crush and finely grind the precipitated slag from vanadium smelting wastewater. The grinding fineness is less than 0.074 mm, accounting for 82%, to obtain precipitated finely ground slag, and then mix the precipitated finely ground slag with sodium carbonate. 30% by weight, and then put it into a microwave muffle furnace for short-term roasting. The microwave conditions are: microwave frequency 2000MHz, microwave power 1500W, and roas...

Embodiment 2

[0037] The raw material vanadium smelting wastewater precipitated slag treated in this embodiment is the same as that in Embodiment 1.

[0038] A method for resource recovery and treatment of vanadium smelting wastewater sedimentation slag, specifically including steps:

[0039]S1: Crushing and finely grinding the vanadium smelting wastewater sedimentation slag, the grinding fineness is less than 0.074 mm, accounting for 83%, to obtain the precipitated fine grinding slag, and then mixing the precipitated fine grinding slag with sodium carbonate, the amount of sodium carbonate added is the vanadium smelting wastewater precipitation slag 40% by weight, and then put it into a microwave muffle furnace for short-term calcination, the microwave conditions are: microwave frequency 900MHz, microwave power 1000W, calcination temperature 600 ℃. The short-term roasting time is controlled to be 50 minutes; the roasted slag is obtained.

[0040] S2: adding water to the calcined slag obtai...

Embodiment 3

[0044] The raw material vanadium smelting wastewater precipitated slag treated in this embodiment is the same as that in Embodiment 1.

[0045] A method for resource recovery and treatment of vanadium smelting wastewater sedimentation slag, specifically including steps:

[0046] S1: crush and finely grind the vanadium smelting wastewater sediment slag, the grinding fineness is less than 0.074 mm, accounting for 85%, to obtain the precipitated fine grinding slag, and then mix the precipitated fine grinding slag with sodium carbonate, and the amount of sodium carbonate added is the vanadium smelting wastewater sediment slag 20% by weight, and then put it into a microwave muffle furnace for short-term calcination. The microwave conditions are: microwave frequency 2500MHz, microwave power 500W, and calcination temperature 400°C. The short-term roasting time is controlled to be 45 minutes; the roasted slag is obtained.

[0047] S2: adding water to the calcined slag obtained in ste...

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Abstract

The invention belongs to the technical field of solid waste treatment in the metallurgical industry, and specifically discloses a resource recovery and treatment method for smelting wastewater sedimentation slag. In the method, the vanadium smelting wastewater precipitation slag is crushed and finely ground, mixed with sodium carbonate, and then roasted in a microwave environment for a short time to obtain a roasted slag, and then the roasted slag is subjected to ultrasonic rapid water immersion, and solid-liquid separation to obtain a leaching solution containing vanadium and molybdenum. The resource recovery and treatment method for smelting wastewater sediment slag provided by the present invention can separate vanadium and molybdenum elements at the same time, and has high recovery rate and high purity, and also effectively shortens the processing time of sediment slag, improves the processing capacity of sediment slag, not only It is beneficial to the harmless treatment of industrial solid waste, and also provides a new source of vanadium and molybdenum.

Description

technical field [0001] The invention relates to the technical field of solid waste treatment in the metallurgical industry, in particular to a method for resource recovery and treatment of sedimentation slag produced after smelting wastewater is left to settle. Background technique [0002] Vanadium smelting generally adopts the roasting-leaching-precipitation process, and a large amount of wastewater is generated during the production process, such as precipitation mother liquor and vanadium residue solution. After standing and settling, these wastewater will produce sedimentation slag, which contains valuable resources such as vanadium and molybdenum. , but also contains harmful substances such as chromium. [0003] With the rapid development of the modern chemical industry at home and abroad, the demand for chemical raw materials such as vanadium and molybdenum is increasing year by year. Extracting vanadium, molybdenum and their compounds from ores alone can no longer m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B1/02C22B34/22C22B34/34C02F11/10C02F11/15C02F103/16
CPCC02F11/10C02F2103/16C22B1/02C22B7/006C22B34/22C22B34/34C02F11/15Y02P10/20
Inventor 马致远吕建芳吕先谨刘勇刘牡丹周吉奎
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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