Process and device for continuous production of superfine cobalt carbonate powder

A technology of cobalt carbonate powder and process, applied in the direction of cobalt carbonate, etc., can solve the problems of difficult treatment of waste liquid and uneven particle size, and achieve the effects of reduced coprecipitation, small and stable crystal nuclei, and uniform particle size distribution

Active Publication Date: 2015-03-18
JINGMEN GEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Based on the above problems, the object of the present invention is to provide a process for continuous production of ultrafine cobalt carbonate powder, which solves the uneven particle size caused by strong stirring, the co-precipitation caused by high pH value and the difficult problem of subsequent waste liquid; The product produced by the invention has high purity, small particle size and uniform distribution

Method used

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  • Process and device for continuous production of superfine cobalt carbonate powder
  • Process and device for continuous production of superfine cobalt carbonate powder
  • Process and device for continuous production of superfine cobalt carbonate powder

Examples

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Embodiment 1

[0055] figure 1 It is a schematic diagram of a device for continuous production of ultrafine cobalt carbonate powder. Such as figure 1 Shown, a kind of device of continuous production superfine cobalt carbonate powder comprises two-stage reactor, wherein comprises a primary reactor 1 for nucleation reaction and a secondary reactor 2 for growth and crystallization process; The device also includes a cobalt salt storage tank 3 for storing the feed liquid and a precipitant storage tank 4 for storing the lye; the primary reaction kettle 1 is provided with a temperature regulator 8, a pH value regulator 9 and a vortex Stirrer 12; also be provided with independent temperature regulator 10, pH value regulator 11 and flow mixer 13 in described secondary reactor; The overflow ports 14 and 15 with valves are respectively located at 1 / 8h and 1 / 2h from the top of the reactor (h is the height of the primary reactor); the side wall of the secondary reactor 2 is provided with a material in...

Embodiment 2

[0058] A kind of technique of producing superfine cobalt carbonate powder, comprises the steps:

[0059] (1) Prepare cobalt nitrate solution and ammonium carbonate solution

[0060] Configure the volume in the configuration slot to be 10m 3 , a cobalt nitrate solution with a concentration of 60g / L and a volume of 20m 3 , ammonium carbonate solution with a concentration of 100g / L, and then pumped into the cobalt liquid storage tank and the precipitant storage tank respectively.

[0061] (2) First-order reaction—uniform nucleation

[0062] First, add 300L pure aqueous solution dissolved with 1Kg of ammonium nitrate into the primary reactor as the bottom liquid, turn on the turbine agitator and the pre-used overflow valve, then turn on the cobalt liquid delivery pump and the lye liquid delivery pump, and open the cobalt liquid respectively The flow meters of the storage tank and the precipitant storage tank make the cobalt salt solution flow into the reaction kettle at a flow ...

Embodiment 3

[0068] A kind of technique of producing superfine cobalt carbonate powder, comprises the steps:

[0069] (1) Prepare cobalt chloride solution and ammonium bicarbonate solution;

[0070] Configure the volume in the configuration slot to be 10m 3 , a cobalt chloride solution with a concentration of 80g / L and a volume of 20m 3 , ammonium bicarbonate solution with a concentration of 150g / L, and then pumped into the cobalt liquid storage tank and the precipitant storage tank respectively.

[0071] (2) First-order reaction—uniform nucleation

[0072] First, add a mixture of 300L pure water and 0.5L hydrochloric acid into the primary reactor as the bottom liquid, open the turbine agitator and the pre-used overflow valve, then open the cobalt liquid delivery pump and lye delivery pump, and turn on the cobalt liquid The flow meters of the liquid storage tank and the precipitant storage tank allow the cobalt salt solution to flow into the reactor from the bottom of the first-stage re...

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Abstract

The invention discloses a process for continuous production of superfine cobalt carbonate powder, the process includes two stages: first order reaction is homogeneous nucleation, the temperature is controlled at 15 to 30 DEG C, the pH value is 5.8-6.8, the vortex stirring speed is 800-1200R / min; and second stage reaction is growth and crystallization, the reaction temperature is controlled at 40 to 55 DEG C, the pH value is 6.8-7.2, the advection stirring speed is 200-400R / min, and a wet material is obtained by filtration of a precipitation material. The characteristics of the process are that: nucleation and growth processes are effectively separated, controllable cobalt carbonate powder particle size and morphology can be ensured, the co precipitation of impurity ions can be effectively avoided due to low pH value, and the product purity is improved. The invention also provides a device for the continuous production of the superfine cobalt carbonate powder, the characteristics are that: the device includes two stages of reactors, the process parameters can be independently set to facilitate independent performing of the nucleation and growth process.

Description

technical field [0001] The invention relates to the technical field of cobalt carbonate powder production, in particular to a process for continuously producing superfine cobalt carbonate powder and a device thereof. Background technique [0002] Cobalt carbonate has a wide range of uses in the field of industrial technology, requiring cobalt carbonate powder to have the characteristics of high purity, low bulk density, small particle size and uniform distribution. [0003] The traditional cobalt carbonate production method is a batch production process. In the precipitation stage, a precipitant is directly added to the cobalt salt solution, and the sedimentation tank by tank is easy to reunite between particles. The production efficiency of the corresponding production equipment is low, and the control of process parameters is not accurate and constant, resulting in uneven particle size distribution of products, inconsistent crystal forms, and unstable product quality, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/06
Inventor 苏陶贵
Owner JINGMEN GEM NEW MATERIAL
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