CN102198383A

CN102198383A - Compound desulfurizer

Info

Publication number: CN102198383A
Application number: CN2011100585331A
Authority: CN
Inventors: 唐铁石; 李名顺; 夏敬事; 郭长戍
Original assignee: Hubei Tongshan Tongli Magnesium Industry Co Ltd
Current assignee: Hubei Tongshan Tongli Magnesium Industry Co Ltd
Priority date: 2008-10-20
Filing date: 2008-10-20
Publication date: 2011-09-28

Abstract

The invention relates to a compound desulfurizer, in particular to a granulating technology of the compound desulfurizer for steel-making. The granulating technology of the compound desulfurizer comprises the steps: a powdered desulfurizer is extruded to be strips by an extruder; the strips are crushed by a crusher; and then the crushed strips are screened to classify to obtain the compound desulfurizer with required granularity. By use of the granulating technology, not only the granulated compound desulfurizer can maintain a certain mechanical strength, but also the powdered desulfurizer can be fully utilized so as to reach the purpose of making full use of materials.

Description

Composite desulfurizing agent

Technical field

The present invention relates to the granulating technique of lime, particularly relate to the granulating technique of ironmaking (steel) with powdery active lime.

The invention still further relates to the task equipment of the method for granulating powdery active lime.

Background technology

Active lime is to make steel the primary raw material of desulfurizing agent of usefulness at present, when when steel-making, using the desulfurization of KR method, requiring to use granularity is 0.5～1.6mm and the high active granular active lime with certain mechanical strength, prior art can only be made the finished product that granularity is 0.5～1.6mm size with block high activity active lime lime at present, recovery rate is about 30%～40%, though those pulverized limestones less than 0.5mm have same CaO content and activity, also can only abandon, with regard to having caused, caused the waste of resource like this to having most to handle in the special high-quality active lime of producing of steel-making as common lime.Chinese patent CN1237538 discloses agglomeration forming technique of active time fine material, this disclosure of the Invention after mixing with fluorite and additive pitch or fluorite and additive tar, heavy oil or kerosene and active lime etc., briquet heats then, dries and make the synthetic block method of active lime.Because foregoing invention has increased the ratio of binding agent, the content of calcium oxide and activity will increase and reduce along with binding agent like this.

Summary of the invention

The object of the invention just provides a kind of technology of powdery active lime powder processing granulating, this technology has reduced cost, produce relatively easy, do not increase any additives, the active granulating rear oxidation of active lime powder calcium content is remained unchanged, can make the active lime of granulating keep certain mechanical strength again, reach the purpose that material makes full use of.

Another goal of the invention of the present invention just provides a kind of task equipment of simple in structure, disposal molding powdery active lime.

The present invention is exactly that active lime with powdery is pressed into striped blocks by extruder, and described striped blocks is pulverized through pulverizer, and sieve classification becomes the active lime of desired particle size.

A kind of prilling process of powdery active lime comprises following technology:

A adds feed hopper with powdery active lime;

B by Compulsory feeder used powdery active lime be pressed into the flaking machine group in hydraulic system between roll and the roll groove be pressed into strip or cylindrical active lime striped blocks;

C enters crusher in crushing with the striped blocks active lime, and the screening back becomes the active lime of desired particle size.

The hydraulic pressure of the flaking machine group of extruder of the present invention is 0.6-0.7Mpa, and preferred version is that to be pressed into strip and block be 12～14 * 120～180mm to 0.7Mpa..

A kind of Granulation Equipments of powdery active lime comprises a framework platform, a forced feed system, and one is rolled sheet hydraulic pressure unit, broken hierarchy system and recovery system.

The flaking machine group of granulation Granulation Equipments is made up of roll A and roll B, roll A is movable roll, can move by hydraulic levels, roll B is a stationary roll, in order to regulate the gap between roll A and the roll B, roll A and roll B surface have with roll shaft to groove consistent and that be complementary, form one and have strip or columniform cavity.

The disintegrating machine of Granulation Equipments is connected in the same rotating shaft by the blade of disintegrating machine, two adjacent cutters are one group, press an angle of 90 degrees degree and install, blade space and knife number are pulverized according to material and are required to adjust with the body model, and the blade high speed rotating is pulverized the strip active lime; Be covered with aperture above the disintegrating machine screen cloth, the aperture is pulverized according to material and is required to adjust; Classified sieve classification is divided into the different grain size of user's needs.

Because the present invention do not add any medium, use only be physical mechanical method, the baking of also need not heating is so can not influence the activity of active lime and the content of calcium oxide.

The present invention is squeezed into the variation that strip device is not limited in hydraulic way and form of a blade, and the employing alternate manner also should be within protection scope of the present invention.

The present invention can also make the composite desulfurizing agent pellet by add other desulfurizing agent of various ironmaking (steel) (as the magnesium powder etc.) in powdery active lime.

Description of drawings

1 quantifying feed machine, 2 Compulsory feeder used 3 framework platforms

4 flaking machines, 5 hydraulic systems, 6 disintegrating machines

7 classifying screens, 8 material-returning devices, 9 material charging apertures

10 casings, 11 breaker bars, 12 disintegrating machine screen clothes

13 material discharging openings

Fig. 1 pulverized limestone comminutor profile

Fig. 2 pulverized limestone comminutor Hydraulic Double roll-in bar shaping enlarged diagram

Fig. 3 pulverized limestone granulator blade side view

Specific embodiments

1 with powdery active lime dosing unit 1 adding feed hopper.

2 are pressed into the flaking machine group to powdery active lime by Compulsory feeder used 2, the flaking machine group is made up of roll A and roll B, roll A is movable roll, can move horizontally, roll B is a stationary roll, in order to regulating the gap between roll A and the roll B, roll A has with roll shaft with roll B surface and is complementary to consistent groove, forms one and has strip or columniform cavity.The flaking machine group is pressed into striped blocks through hydraulic control with powdery active lime, and the pressure of flaking machine group hydraulic pressure is 0.6～0.7MPa, and preferred version is 0.7Mpa.Being pressed into strip is 12～14 * 120～180mm, and preferred version is 15 * 150mm.

3 active limes with striped blocks enter crusher in crushing, the blade of disintegrating machine is connected in the same rotating shaft, two adjacent cutters are one group, pressing an angle of 90 degrees degree installs, blade space and knife number are pulverized according to material and are required to adjust with the body model, and the blade high speed rotating is pulverized the strip active lime; Be covered with aperture above the disintegrating machine screen cloth, the aperture is pulverized requirement according to material and is adjusted; The classified different brackets that sieves into user's needs is respectively 14 orders, 18 orders, 28 orders, 35 orders etc.

4 active limes that will not meet classification standard again return again through material-returning device to be suppressed, processes.

Embodiment 1 is that 350ml-370ml, calcium oxide content are the active lime dosing unit 1 adding feed hopper of 95%-98% with activity degree, by Compulsory feeder used 2 powdery active lime is pressed into the flaking machine group, the active lime of striped blocks is entered crusher in crushing, classified different grain size grade of sieving into user's needs, be respectively 14 orders, 18 orders, 28 orders, the equigranular active lime pellet of 35 orders.Detect to such an extent that activity degree is 350ml-370ml, calcium oxide content is the active lime of 95%-98%.

Embodiment 2 is that 370ml-400ml, calcium oxide content are the active lime dosing unit 1 adding feed hopper of 95%-98% with activity degree, by Compulsory feeder used 2 powdery active lime is pressed into the flaking machine group, the active lime of striped blocks is entered crusher in crushing, classified sieve classification is divided into the different grain size grade of user's needs, be respectively 14 orders, 18 orders, 28 orders, the equigranular active lime pellet of 35 orders.Detect to such an extent that activity degree is 370ml-400ml, calcium oxide content is 95%-98%.

Embodiment 3 is the same, is that 400ml-450ml, calcium oxide content are the active lime of 95%-98% with activity degree, and the granular active lime of making is that 400ml-450ml, calcium oxide content are 95%-98%.

Claims

1. composite desulfurizing agent is characterized in that following prilling process makes:

A is pressed into striped blocks with the desulfurizing agent of various powderies by extruder;

B pulverizes described striped blocks through pulverizer;

The c sieve classification becomes the composite desulfurizing agent of desired particle size.

2. composite desulfurizing agent is characterized in that following prilling process makes:

A adds feed hopper (1) with various desulfurizer powders;

B is pressed into flaking machine group (4) to desulfurizing agent by Compulsory feeder used (2) and is pressed into strip material composite desulfurizing agent through hydraulic system (5);

C enters disintegrating machine (6) fragmentation with strip material composite desulfurizing agent, and the screening back becomes the composite desulfurizing agent of desired particle size.

3. a kind of composite desulfurizing agent as claimed in claim 1 or 2 is characterized by: the composition of described composite desulfurizing agent comprises active lime, magnesium powder.

4. a kind of composite desulfurizing agent as claimed in claim 1 or 2 is characterized by: the composition of described composite desulfurizing agent comprises active lime, magnesium powder, fluorite.

5. as the described a kind of composite desulfurizing agent of claim 2-4, the pressure of described flaking machine group hydraulic pressure is 0.6～0.7Mpa.

6. a kind of composite desulfurizing agent as claimed in claim 5, the pressure of described flaking machine group hydraulic pressure is 0.7Mpa.