Fluid active lime powder with low surface energy and production method thereof

A low surface energy, lime powder technology, applied in the field of low surface energy fluid active lime powder and its production, can solve the problems of high production conditions, low production conditions, long calcination time, etc., and achieve resource saving and high activity , the effect of convenient production

CN101643820AInactive Publication Date: 2010-02-10HUBEI HESHI CALCIUM IND DEV
1 Cites 10 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2010-02-10
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

The invention relates to fluid active lime powder, in particular to fluid active lime powder which has low surface energy, is used for desulfurizing molten steel and iron and comprises lime powder anda modifier in a weight ratio ranging 100:0.5 to 100:0.7. The modifier comprises the following components: a chromic compound, an ethanol solution, soap powder, alkali liquor, a vector and organic silicon oil. The production method of the fluid active lime powder with low surface energy comprises the following steps: sequentially selecting limestone; kilning; calcining; crushing; proportionally mixing the limestone in the modifier; and finally, grinding to obtain the active lime powder. The active lime powder has short calcination time, high activity, strong water resistance and higher fluidity, is suitable for desulphurization by an injection method and can improve the steel-iron production efficiency.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to an active lime powder and a production method thereof, in particular to a low surface energy fluid active lime powder used for desulfurization of molten steel and molten iron and a production method thereof. Background technique

[0002] The desulfurization of molten steel in the existing steelmaking technology mainly uses calcium oxide-based desulfurizers, sodium carbonate-based desulfurizers, calcium carbide-based desulfurizers or magnesium-based desulfurizers. These desulfurizers are prone to deliquescence and cannot maintain high activity for a long time. Moreover, it has no fluidity and cannot be used in injection desulfurization equipment at all, which is not conducive to the improvement of my country's steel quality.

[0003] The Chinese patent authorization announcement number is CN1293258, and the invention patent whose authorization announcement date is 2001.05.02 discloses a fluidized long-acting active lime powder an...

Examples

Embodiment 1

[0043] A low surface energy fluid active lime powder, including lime powder and a modifier, the weight ratio of the lime powder and the modifier is: 100:0.5, and the composition and weight ratio of the modifier are: chromium trioxide 45, 95% ethanol solution 95, soap powder 21, 40% potassium hydroxide solution 51, calcium oxide 100, silicone oil 71.

[0044] A method for producing the above-mentioned low-surface-energy fluid active lime powder, the production steps are: selecting limestone, kiln-calcining, crushing, mixing the above-mentioned improver, fine grinding and storing;

[0045] The step of selecting limestone refers to: select limestone of 50mm-100mm to wash with water, dry and install in a kiln;

[0046] The calcination step refers to: the temperature of calcination after kiln installation is 1150°C-1250°C, and the time is 2-2.5 hours;

[0047] The crushing step refers to: crushing the calcined lime, the particle size is less than 20mm;

[0048] Said mixing the ab...

Embodiment 2

[0051] A low surface energy fluid active lime powder, including lime powder and a modifier, the weight ratio of the lime powder and the modifier is: 100:0.7, and the composition and weight ratio of the modifier are: chromium trioxide 60, 96% ethanol solution 110, soap powder 30, 50% sodium hydroxide solution 5.8, calcium carbonate 100, silicone oil 10.

[0052] A method for producing the above-mentioned low-surface-energy fluid active lime powder, the production steps are: selecting limestone, kiln-calcining, crushing, mixing the above-mentioned improver, fine grinding and storing;

[0053] The step of selecting limestone refers to: select limestone of 50mm-100mm to wash with water, dry and install in a kiln;

[0054] The calcination step refers to: the temperature of calcination after kiln installation is 1150°C-1250°C, and the time is 2-2.5 hours;

[0055] The crushing step refers to: crushing the calcined lime, the particle size is less than 20mm;

[0056] Said mixing the...

Embodiment 3

[0059] A low surface energy fluid active lime powder, including lime powder and a modifier, the weight ratio of the lime powder and the modifier is: 100:0.6, and the composition and weight ratio of the modifier are: chromium trichloride 53 , 99% ethanol solution 100, soap powder 24, 30% sodium hydroxide solution 5.7, polyethylene paraffin 100, silicone oil 9.

[0060]A method for producing the above-mentioned low-surface-energy fluid active lime powder, the production steps are: selecting limestone, kiln-calcining, crushing, mixing the above-mentioned improver, fine grinding and storing;

[0061] The step of selecting limestone refers to: select limestone of 50mm-100mm to wash with water, dry and install in a kiln;

[0062] The calcination step refers to: the temperature of calcination after kiln installation is 1150°C-1250°C, and the time is 2-2.5 hours;

[0063] The crushing step refers to: crushing the calcined lime, the particle size is less than 20mm;

[0064] Said mixi...