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Production method of reducing ferrotitanium powder for electric welding rod

A production method and technology of ferro-titanium powder, applied in the direction of furnace types, furnaces, fluidized bed furnaces, etc., can solve the problem that the reduction of titanium concentrate powder components is not feasible, and achieve the effect of shortening the reaction time

Inactive Publication Date: 2018-03-09
海安县弘鑫焊材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to be matched with an enterprise that produces hot gas. When there is no gas supporting production enterprise, it is necessary to build a gas production line when producing reduced titanium concentrate powder. The initial scale of the gas production line is very large, and the gas produced by it is only used Compositionally infeasible for the production of reduced titanium concentrate powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) prepare materials, choose ilmenite powder, coal dust and lime, and all be ground into the particle of 4-6mm;

[0017] The parts by mass of the above-mentioned raw materials are: 40 parts of ilmenite powder, 15 parts of coal powder, and 1 part of lime;

[0018] (2) direct reduction by circulating fluidized bed furnace,

[0019] Mix the above raw materials to make a mixture, then spray the mixture into the circulating fluidized bed furnace for combustion, and blast air at the same time, the air supply volume per kilogram of pulverized coal is 5m 3 , wind pressure 11000Pa;

[0020] Secondary air supply to the furnace, the air supply volume per kilogram of pulverized coal is 2m 3 , wind pressure 8000Pa;

[0021] Calcination at 1000°C for 1h;

[0022] (3) Cooling, discharge the reduced material into the cooling kiln for cooling, use nitrogen protection, and carry out water spray cooling, after cooling to normal temperature, send it to selection treatment;

[0023] (...

Embodiment 2

[0025] (1) prepare materials, select ilmenite powder, coal dust and lime, and all be ground into the particle of 6-8mm;

[0026] The parts by mass of the above-mentioned raw materials are: 50 parts of ilmenite powder, 20 parts of coal powder, and 2 parts of lime;

[0027] (2) direct reduction by circulating fluidized bed furnace,

[0028] Mix the above raw materials to make a mixture, then spray the mixture into the circulating fluidized bed furnace for combustion, and blast air at the same time, the air supply volume per kilogram of pulverized coal is 6m 3 , wind pressure 13000Pa;

[0029] Secondary air supply to the furnace, the air supply volume per kilogram of pulverized coal is 2.5m 3 , wind pressure 9000Pa;

[0030] Calcined at 1200°C for 2h;

[0031] (3) Cooling, discharge the reduced material into the cooling kiln for cooling, use nitrogen protection, and carry out water spray cooling, after cooling to normal temperature, send it to selection treatment;

[0032] (...

Embodiment 3

[0034] (1) prepare materials, choose ilmenite powder, coal dust and lime, and all be ground into the particle of 4-8mm;

[0035] The parts by mass of the above-mentioned raw materials are: 45 parts of ilmenite powder, 18 parts of coal powder, and 1.5 parts of lime;

[0036] (2) direct reduction by circulating fluidized bed furnace,

[0037] Mix the above raw materials to make a mixture, then spray the mixture into the circulating fluidized bed furnace for combustion, and blast air at the same time, the air supply volume per kilogram of coal powder is 5.5m 3 , wind pressure 12000Pa;

[0038] Secondary air supply to the furnace, the air supply volume per kilogram of pulverized coal is 2.3m 3 , wind pressure 8500Pa;

[0039] Calcined at 1100°C for 1.5h;

[0040] (3) Cooling, discharge the reduced material into the cooling kiln for cooling, use nitrogen protection, and carry out water spray cooling, after cooling to normal temperature, send it to selection treatment;

[0041]...

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PUM

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Abstract

The application discloses a production method of reduced ferrotitanium powder for electric welding rods, comprising the following steps: (1) preparing materials, selecting ilmenite powder, coal powder and lime, and all pulverizing them into particles ≤ 8mm; the mass of each of the above-mentioned raw materials The number of parts is: 40-50 parts of ilmenite powder, 15-20 parts of coal powder, and 1-2 parts of lime; (2) direct reduction in a circulating fluidized bed furnace, mixing the above raw materials to make a mixture, and then The mixed material is sprayed into the circulating fluidized bed furnace for combustion, blowing air at the same time, and supplying air to the furnace for the second time, and calcining at 1000-1200°C for 1-2h; (3) cooling, and discharging the reduced material into the cooling kiln Cooling, using nitrogen protection, cooling to room temperature and then sending to selection treatment; (4) screening, magnetic separation, winnowing and surface treatment of cooled materials. The present invention shortens the reaction time due to simultaneous combustion and reduction, and can adjust the ratio of coal powder and lime according to different grades of ilmenite powder to achieve the best effect.

Description

technical field [0001] The invention relates to a production method of reduced ferrotitanium powder for welding rods. Background technique [0002] Reduced ferrotitanium powder is the raw material for the production of welding rods, and is in great demand. At present, the conventional method is to use a rotary kiln to produce reduced ferrotitanium powder. Because the process of producing reduced ferrotitanium powder using the rotary kiln process is complicated, the reduction time Long, high energy consumption, insufficient degree of reduction. For this reason, people have invented a method of using high-temperature flue gas to reduce titanium concentrate powder to produce reduced ilmenite powder. The first choice of this method is to use high-temperature flue gas to pre-oxidize titanium concentrate powder, and then continue to Oxidize the pre-oxidized titanium concentrate powder, reduce the oxidized titanium concentrate powder with hot gas, and finally perform anaerobic coo...

Claims

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Application Information

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IPC IPC(8): C21B13/00
CPCC21B13/0033C21B2200/00
Inventor 周建才
Owner 海安县弘鑫焊材有限公司