CN106637294B

CN106637294B - The method for decoppering of nickel solution

Info

Publication number: CN106637294B
Application number: CN201611259526.7A
Authority: CN
Inventors: 龙炳清; 聂付江; 邓其娟
Original assignee: Sichuan Normal University
Current assignee: Sichuan Normal University
Priority date: 2016-12-30
Filing date: 2016-12-30
Publication date: 2018-09-11
Anticipated expiration: 2036-12-30
Also published as: CN106637294A

Abstract

The method for decoppering for the nickel solution that the present invention introduces uses thioacetamide and the compound decopper(ing) agent of vulcanized sodium, and decopper(ing) slag is added and carries out decopper(ing) under ul-trasonic irradiation, and the copper concentration of the solution after decopper(ing) is less than 1mg/L.

Description

The method for decoppering of nickel solution

Technical field

The present invention relates to a kind of method for decoppering of nickel solution.

Background technology

Nickel is the important source material of many industrial goods productions.In the production process of nickel, qualified electrolyte is to ensure nickel matter The precondition of amount.All contain copper in nickel solution, copper has a significant effect to the quality of nickel, and therefore, the decopper(ing) of nickel solution is nickel life Produce essential process.At present the main method of nickel solution decopper(ing) have the earth of positive pole and（Or）Nickel ore concentrate decopper(ing), active nickel sulfide Decopper(ing).The former decopper(ing) effect is not so good, and the quantity of slag is big, and Slag treatment is difficult, and also causes platinum group metal during Slag treatment Loss；The latter needs to prepare active nickel sulfide in weak solution, and the active nickel sulfide prepared must timely use, and otherwise exist It can be inactivated during storage, influence decopper(ing) effect, process matching requirement is very high, is additionally likely to cause the water of process system It is uneven.The nickel solution method for decoppering that exploitation decopper(ing) effect is good, easy to operate, decopper(ing) slag is easily processed has larger practical valence Value.

Invention content

For current nickel solution decopper(ing) there are the problem of, the purpose of the present invention is find decopper(ing) effect it is good, easy to operate, de- The nickel solution method for decoppering that copper ashes is easily processed, it is characterised in that reaction will be inputted by the nickel solution of deferrization and dearsenification processing Device is added decopper(ing) slag, thioacetamide and vulcanized sodium composite solution and is reacted under ul-trasonic irradiation.After reaction, into Row is separated by solid-liquid separation, and obtains qualified solution.After the wash heat isolated is washed（Mode of washing and washing water consumption are consistent with prior art） Part Returning reactor partly send converter mattes smelting furnace to handle.Reactor is mechanically stirred reactor, tubular reactor, folding One kind of formula reactor and labyrinth type reactor.Reaction temperature is 25 DEG C~60 DEG C.Reaction time is 8min~20min.Often stand The power of square rice solution input ultrasonic wave is 2kW~6kW.The addition of vulcanized sodium is the 120%~140% of theoretical amount.Thio second The addition of amide is the 3%~5% of theoretical amount.The addition of decopper(ing) slag is that preceding batch of same amount solution treatment generates the quantity of slag only（It generates Total quantity of slag subtract the quantity of slag of addition）100%~150%.Na in composite solution₂A concentration of 150g/L~300/L of S, it is thio The concentration of acetamide is by Na₂The concentration and addition of S and the addition of thioacetamide determine jointly.When anti-using mechanical agitation When answering device, mechanical agitation intensity is 30 r/min~50r/min.When anti-using tubular reactor, collapsible reactor, labyrinth type When answering device, the flow velocity of solution in the reactor is not less than 1m/s.The first use of this method is added without decopper(ing) slag.This method makes The decopper(ing) of the nickel solution in metallic nickel production is not limited to range, the nickel for being also applied for the production processes such as nickel salt and nickel oxide is molten The decopper(ing) of liquid.When the decopper(ing) of the nickel solution handled by deferrization and dearsenification in being produced for metallic nickel, solution need not be adjusted PH value；When the decopper(ing) for other nickel solutions, the pH value of decopper(ing) process should be controlled in 4.5~6.0 ranges.

The object of the present invention is achieved like this, after thioacetamide, vulcanized sodium and decopper(ing) slag is added in the nickel solution of cupric, Following reaction occurs：

CH₃CSNH₂ + H₂O + Cu²⁺ = CH₃CONH₂ + CuS +2H⁺

CH₃CSNH₂ + H₂O + Ni²⁺ = CH₃CONH₂ + NiS +2H⁺

Na₂S + Cu²⁺ = CuS + 2Na⁺

Na₂S + Ni²⁺ = NiS + 2Na⁺

NiS + Cu²⁺ = CuS + Ni²⁺

By above-mentioned series reaction, the copper in solution is removed in the form of CuS is precipitated, and reaches the purification of nickel solution decopper(ing) Purpose.

Test result shows：When thioacetamide is used alone, even if its addition is the 300% of theoretical amount, in solution Copper concentration still above 10mg/L；When vulcanized sodium is used alone, a large amount of colloidal substances are contained in the slag of generation, it is difficult to carry out It is separated by solid-liquid separation；When the two is used in combination, both can depth decopper(ing), meet prior art requirement, the precipitation and filterability of decopper(ing) slag It can also very well.

Decopper(ing) slag part, which returns to use, can reduce the dosage of decopper(ing) agent, while reduce total yield of decopper(ing) slag.

The effect of input ultrasonic wave is to speed up the mass transport process of reaction, greatly shortens the reaction time.

When using tubular reactor, collapsible reactor, labyrinth type reactor, the flow velocity of solution in the reactor is not small In 1m/s, the purpose is to avoid during the reaction, solid deposits.

Relative to existing method, the present invention uses thioacetamide and the compound decopper(ing) agent of vulcanized sodium, and returning part decopper(ing) Slag, has that decopper(ing) effect is good, decopper(ing) product is separated by solid-liquid separation that performance is good, decopper(ing) agent consumption is small, decopper(ing) slag yield is few, and is free of Platinum group metal, the loss of platinum group metal can be substantially reduced, decopper(ing) slag can directly return converter mattes smelting furnace processing outstanding advantages of, With apparent economic benefit and environmental benefit.

Specific implementation method

Embodiment 1：The nickel solution 5L that processing is handled by deferrization and dearsenification in mechanically stirred reactor（Ingredient：Ni²⁺ 55.5g/L、Cu²⁺517mg/L、pH5.5）.Reaction condition is：25 DEG C of temperature, time 15min, stirring intensity are 30 r/min, often The ultrasonic power of cubic meter solution input is 2kW, the addition of thioacetamide is the 4% of theoretical amount, the addition of vulcanized sodium The 100% of the net quantity of slag that batch same amount solution treatment generates before being for the 135% of the theoretical amount, addition of decopper(ing) slag.Solution after processing Copper concentration be 0.29 mg/L.

Embodiment 2：The nickel solution 100L that processing is handled by deferrization and dearsenification in tubular reactor（Ingredient：Ni²⁺ 58.4g/L、Cu²⁺498mg/L、pH4.8）.Reaction condition is：35 DEG C of temperature, time 8min, solution flow velocity be 1.0m/s, it is every The ultrasonic power of cubic meter solution input is 4kW, the addition of thioacetamide is the 3% of theoretical amount, the addition of vulcanized sodium The 150% of the net quantity of slag that batch same amount solution treatment generates before being for the 120% of the theoretical amount, addition of decopper(ing) slag.Solution after processing Copper concentration be 0.45mg/L.

Claims

1. a kind of method for decoppering of nickel solution, it is characterised in that the nickel solution input reactor that will be handled by deferrization and dearsenification, Decopper(ing) slag, thioacetamide and vulcanized sodium composite solution is added to be reacted under ul-trasonic irradiation, after reaction, consolidate Liquid detaches, and obtains qualified solution, and rear part Returning reactor is washed in the wash heat isolated, and partly send converter mattes smelting furnace to handle, instead It is one kind of mechanically stirred reactor, tubular reactor, collapsible reactor and labyrinth type reactor, reaction temperature 25 to answer device DEG C~60 DEG C, the reaction time is 8min~20min, and the power of every cubic metre of solution input ultrasonic wave is 2kW~6kW, vulcanized sodium Addition be the 120%~140% of theoretical amount, the addition of thioacetamide is the 3%~5% of theoretical amount, the addition of decopper(ing) slag Amount generates the 100%~150% of the quantity of slag only for preceding batch of same amount solution treatment, Na in composite solution₂A concentration of 150g/L~300/ of S L, the concentration of thioacetamide is by Na₂The concentration and addition of S and the addition of thioacetamide determine jointly, when using machinery When stirred reactor, mechanical agitation intensity is 30 r/min~50r/min, when using tubular reactor, collapsible reactor, fan When the formula reactor of palace, the flow velocity of solution in the reactor is not less than 1m/s.