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Dry kiln interior desulfurizer for smelting ferronickel through RKEF method

A desulfurization device and drying kiln technology, applied in the direction of furnace type, furnace, rotary drum furnace, etc., can solve the problem of high desulfurization cost, achieve the effect of improving the reaction effect, promoting drying and desulfurization, and the effect of novel design

Pending Publication Date: 2018-03-02
临沂鑫海新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem of high desulfurization cost in the prior art, and provide a desulfurization device in a dry kiln for smelting ferronickel by RKEF method to overcome the deficiencies of the prior art

Method used

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  • Dry kiln interior desulfurizer for smelting ferronickel through RKEF method
  • Dry kiln interior desulfurizer for smelting ferronickel through RKEF method
  • Dry kiln interior desulfurizer for smelting ferronickel through RKEF method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] refer to Figure 1 to Figure 5 , the present invention includes a cylinder 2, and the inner diameter of the cylinder 2 is evenly provided with a number of lifting plates 3; the cylinder 2 is inclined, and the front end of the cylinder 2 is lower than the rear end of the cylinder;

[0033] The front end of the cylinder 2 is provided with an air inlet 16, and the rear end of the cylinder 2 is provided with an air outlet 12; the front end and the rear end of the cylinder 2 are connected to the kiln head cover 9 and the kiln tail cover 10 respectively through bearing seats. Rotating connection; the top of the kiln head cover 9 is provided with a feed pipe 11 communicating with the rear end of the cylinder body 2, and the bottom of the kiln head cover 9 is provided with an ash discharge bucket 13; the kiln tail cover 10 is provided with a The lower hoppers 15 connected to each other at the front ends of the cylinder body 2;

[0034] The front and rear parts of the cylinder ...

Embodiment 2

[0042] A desulfurizer, which is prepared according to the following process:

[0043]1) Crush wheat straw with a pulverizer, then add it to 2M sodium carbonate aqueous solution, soak for 10 hours, filter, air-dry, and grind to 20-mesh powder to obtain component A;

[0044] 2) Add activated carbon, manganese acetate and ferric chloride to water at a mass ratio of 50:2:1, heat and stir in a magnetic stirrer until dry, then put it in a drying oven at 80°C for 30 minutes, and finally grind until the particle size is 100 mesh, component B is obtained;

[0045] 3) Mix dolomite and kaolin at a mass ratio of 1:1, and then place them in a calcination furnace for 3 hours at a calcination temperature of 700°C, take them out, pulverize them, and cool to room temperature to obtain component C;

[0046] 4) Control the particle size of calcium oxide, calcium fluoride and dicalcium silicate to be 50 mesh, then add them to the mixing mixer according to the mass ratio of 2:1:1, stir at 600rpm ...

Embodiment 3

[0049] The effect test of the desulfurizer prepared by the embodiment of the present invention 2:

[0050] Take 10g of desulfurizer, place it in the reactor for experiment, simulate and detect sulfur-containing gas, the conditions are as follows: SO 2 The sulfur-containing gas composed of , NOx and dust is blown into the reaction system to control SO 2 The concentration is 16mg / m 3 , NOx concentration is 10mg / m 3 , dust 8mg / m 3 , the reaction space velocity (GHSV) is 80,000h -1 , The reaction time is 60min.

[0051] Set up four groups respectively: Example 2; Control group 1: No component A added; Control group 2: No component B added; Control group 3: No component C added.

[0052] The adsorption capacity of the adsorbent to harmful substances was detected (hazardous substance / adsorbent=mg / g), and the results are shown in Table 1.

[0053] Table 1

[0054] group

[0055] Conclusion: As shown in the above table 1, the desulfurization agent of the present inven...

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Abstract

The invention discloses a dry kiln interior desulfurizer for smelting ferronickel through an RKEF method. The dry kiln interior desulfurizer comprises a cylinder internally provided with a lifting board. The cylinder is oblique, and the front end of the cylinder is lower than the rear end of the cylinder. An air inlet and an air outlet are formed in the front end and the rear end of the cylinder.The front end and the rear end of the cylinder are rotationally connected with a kiln head cover and a kiln tail cover correspondingly. A feeding pipe is arranged on the top of the kiln head cover, and an ash unloading hopper is arranged at the bottom of the kiln head cover. A discharging hopper is arranged on the kiln tail cover. Rolling rings are arranged at the front portion and the rear portion of the cylinder correspondingly and rotationally connected with supporting wheels. A rotation tooth disk is arranged at the outer diameter position of the middle portion of the cylinder. Materials enter the cylinder from the position of the feeding pipe, a desulfurizing agent and sulfur oxides are subjected to the sufficient reaction till the purpose of desulfuration is achieved, and desulfurized materials are discharged out of the position of the discharging hopper. The lifting board in the cylinder sufficiently raises materials, and the reaction effect is improved. Purified gas enters thecylinder from the position of the air inlet, high-temperature heat is provided for the interior of the cylinder, and the material drying and desulfuration effects are promoted.

Description

technical field [0001] The invention belongs to the technical field of gas purification devices, and in particular relates to a desulfurization device in a dry kiln for smelting ferronickel by using the RKEF method. Background technique [0002] At present, there are only two smelting processes for laterite nickel ore at home and abroad: pyrotechnics and wet smelting processes, of which there are mainly four pyrotechnic processes: sintering-blast furnace process (BF method), rotary kiln-electric furnace melting process (RKEF method) ; Dominican Eagle Bridge Shaft Furnace - Electric Furnace Technology; Japanese Oeyama Rotary Kiln Direct Reduction Method. Among them, the RKEF method is an advanced and mature technology for pyroprocessing laterite nickel ore, and is widely used. [0003] In the process of producing ferronickel by the RKEF method, the rotary kiln and submerged thermal electric furnace produce a large amount of sulfur oxides, and these gases are directly disch...

Claims

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Application Information

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IPC IPC(8): C22B23/02C22B1/216
CPCC22B23/005C22B23/023
Inventor 张书维刘晨刘洪松孙凤飞
Owner 临沂鑫海新型材料有限公司
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