Reactor and process for preparing iron oxide by utilizing circulation type precipitation method

A technology of precipitation method and reactor, which is applied in the reactor and process field of preparing iron oxide by circular precipitation method, can solve the problems of simple requirements for reaction equipment, achieve uniform reaction degree, facilitate growth control, and prolong residence time

Inactive Publication Date: 2012-12-26
江苏江盛南节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reactor designs for preparing iron oxide in the published reports at present. For example, the invention patent "process and equipment

Method used

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  • Reactor and process for preparing iron oxide by utilizing circulation type precipitation method

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Example Embodiment

[0015] Example 1:

[0016] The structure diagram of the reactor of the present invention is as figure 1 Shown: a reactor for the production of iron oxide by the circulation precipitation method, which is composed of a reaction tank, an inner cylinder, a frequency conversion motor, a main shaft, a stirring blade, a heating coil, a aeration plate, a sewage interface and a thermometer; among them, the reaction tank It is equipped with an inner cylinder. The lower side of the inner cylinder is provided with a return hole. The center of the reaction tank is equipped with a main shaft. The top of the main shaft is equipped with a frequency conversion motor. The middle of the main shaft is equipped with a first stirring blade. The lower part of the main shaft is equipped with a second stirring blade. Aeration plate, the heating coil is installed above the aeration plate, the second stirring blade is located above the heating coil, the first stirring blade is located in the middle and up...

Example Embodiment

[0019] Example 2:

[0020] The structure of the reactor in this example is the same as that in example 1, in which the height of the reaction tank is 10m, and the height-to-diameter ratio of the reaction tank is 3; the effective height of the inner cylinder is 50cm lower than the outer cylinder of the reaction tank; the lower part of the inner cylinder is 100cm from the bottom of the tank evenly Open area is 1000cm 2 The number of holes is 10; the ratio of the diameter of the outer cylinder to the inner cylinder of the reaction tank is 1.2; the material of the reaction tank is 316L stainless steel, and the material of the inner cylinder is titanium.

[0021] The reaction raw material ferrous sulfate solution is added to the reaction tank (the liquid level is to the top of the inner cylinder), sodium hydroxide solution is added to adjust the pH to 10, the heating coil is heated to 90°C with steam, and the aeration plate at the bottom of the reaction tank Into the air, the air volume...

Example Embodiment

[0022] Example 3:

[0023] The structure of the reactor in this example is the same as that in example 1, in which the height of the reaction tank is 5m, and the height-to-diameter ratio of the reaction tank is 2; the effective height of the inner cylinder is 30cm lower than the outer cylinder of the reaction tank; the lower part of the inner cylinder is evenly 50cm away from the bottom of the tank Open area is 250cm 2 The number of holes is 100; the ratio of the diameter of the outer cylinder to the inner cylinder of the reaction tank is 1.6; the material of the reaction tank is titanium, and the material of the inner cylinder is titanium.

[0024] The reaction raw material ferrous sulfate solution is added to the reaction tank (the liquid level is to the top of the inner cylinder), sodium hydroxide solution is added to adjust the pH to 9, the heating coil is heated to 80 ℃ with steam, and the aeration plate at the bottom of the reaction tank Air is introduced into the middle, the...

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Abstract

The invention relates to a reactor and a process for preparing iron oxide by utilizing a circulation type precipitation method. The reactor is composed of a reaction tank, an inner barrel, a frequency conversion motor, a main shaft, stirring paddles, a heating coil and a bottom aeration tray. One inner barrel is installed inside the reaction tank, the frequency conversion motor and the main shaft are installed at the top of the reaction tank, two sets of stirring paddles are installed on the main shaft, and the aeration tray and the heating coil are installed at the bottom of the reaction tank. The frequency conversion motor is controlled by a frequency converter to achieve different stirring speeds and control mixing uniformity of liquid inside the reaction tank. Air required by reaction is fed into the bottom aeration tray, the air rises to drive reaction liquid of the inner barrel to rise and overflow outside the inner barrel, and reaction liquid outside the inner barrel flows downward to form a loop. Reaction material inside the reaction tank is fully mixed, after the reaction is conducted for a period of time, and the reaction is stopped until color paste inside the reaction tank achieves a required state.

Description

technical field [0001] The invention relates to a reactor and a process for preparing iron in an inorganic pigment iron oxide production system, in particular to a reactor and a process for preparing iron oxide by a circulation precipitation method. Background technique [0002] Iron oxide pigment is an important inorganic chemical pigment widely used in coatings, construction and transportation. At present, the production methods of iron oxide pigments include dry method and wet method. A large amount of waste gas is produced in the process of producing iron oxide by the dry method, and the environmental pollution is serious; the wet method is a method commonly used in industry at present. In the production process of producing iron oxide by the wet method, cylindrical reaction tanks are generally used for reaction. The reaction raw material ferrous sulfate solution is added to the reaction tank, and sodium hydroxide solution is added to adjust the pH value. At a certain t...

Claims

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Application Information

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IPC IPC(8): C01G49/06
CPCY02P20/10
Inventor 李卫星付荣傅琦凤
Owner 江苏江盛南节能科技有限公司
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