CN1485445A

CN1485445A - Novel process and apparatus of water quenching steam treatment for modifying steel slag

Info

Publication number: CN1485445A
Application number: CNA021434956A
Authority: CN
Inventors: 崔慧交
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-29
Filing date: 2002-09-29
Publication date: 2004-03-31
Anticipated expiration: 2022-09-29
Also published as: CN1207398C

Abstract

A new method of processing steel slags. It comprises:a. adding an agent for improving property into a slag tank;2) casting into clinkers, cooling rapidly by water;3) separating by magnetic bodies;4) hydrolyzing in a upright processor;5) separating by magnetic rollers, the first sieving;2) cracking;7) separating by magnetic rollers, the second sieving; 8) pulverizing by a ball mill;9) separating by magnetic rollers, the third sieving;10) finely pulverizing by a vibrating mill.

Description

Steel slag modification shrend vapour cure novel process and equipment

One, technical field:

The present invention relates to the comprehensive utilization complete processing and the equipment of steel-making waste residue.

Two, background technology:

At present, it is several that the hot steel slag conventional processes mainly contains hot application method, wind crush method, water quenching, hot vexed method, drum process etc., handle through series of process, hard slag is carried out fragmentation, steel scrap is separated,, be processed into the powder of different size particles according to different purposes, slag is turned waste into wealth, not only solved slag to environment damage but also can bring benefit to the mankind.Above-mentioned technology is concluded, and the subject matter of existence is that processing efficiency is low, poor stability and investment is big, long flow path, cost height, and environment is also had pollution.

Three, summary of the invention:

The object of the present invention is to provide that a kind of technical process is short, level of automation is high, the steel slag modification shrend vapour cure novel process and the equipment of high efficiency, low cost.

The present invention is achieved in that

This steel slag modification shrend vapour cure novel process is characterized in that:

1. hot steel slag adds modification agent after pouring slag ladle into, modification agent comprises carbon powder of reducing agent, swelling agent lime carbonate and promoting agent calcium oxide etc., its carbon dust add-on should be less than 17% of ferrous oxide content in the slag, the add-on of lime carbonate should be less than 2% of slag total amount, with excessive being as the criterion not, the add-on of calcium oxide should can fusion be gone in the slag liquid to exceed to add pan feeding less than 5% of slag total amount.

2. hot steel slag enters chain-belt type tray machine from the slag ladle telophragma of flowing through, and casts the clinker of certain specification size, when the clinker surface solidification, and the chilling of can fetching water, the pressure of fetching water should be greater than 0.3MPa.

3. magnetic separation: the slag fragment after the economy-combat water quick cooling is handled is through separating by magnetic bodies, the steel scrap piece sucking-off that purity is higher.

4. hydrolysis treatment: the slag of magnetic separation sent in the vertical treater be hydrolyzed, slag feeds steam in treatment tank, and vapour temperature should be greater than 78 ℃, and vapor pressure should be less than 0.1MPa, and the treatment time should be greater than 12 hours.

5. magnetic separation screening: the slag that comes out from vertical treater carries out magnetic separation through the magnetic roller, with sending the screening plant screening after the sucking-off of steel scrap grain, can select for use at the bottom of the sieve greater than 20 * 20 millimeters grids, and the big slag particle that sifts out can be used as flux and pavior.

6. hammer is broken: send hammer-crusher to pulverize in the slag that sieves.

7. secondary magnetic separation, screening: the slag after will hammering into shape broken carries out the magnetic separation of magnetic roller once more, carries out regrading then, can select for use greater than 5 * 5 less than 20 * 20 millimeters the grid sieve end, and the slag material of the medium grain that sifts out can be used as the steel slag cement material.

8. ball mill pulverizing: the slag behind the regrading is sent into ball mill pulverize again.

9. carry out magnetic roller magnetic separation for the third time.

10. send ultra-fine vibrating mill to grind, become powder, finish the processing of the finished product, fine powder useful as concrete Additive.

For realizing above-mentioned technological process, required specific equipment comprise chain-belt type tray machine and and vertical treater, its shape and structure of chain-belt type tray machine is identical with pig-casting machine; Vertical treater by tank body, hopper, go up two clock steam endless tube, spiral blowing device, following pair clock and feed bins, diffuse several parts of valve and form, two clocks are housed between elevating hopper and the tank body, tank body is provided with and diffuses valve and steam endless tube, endless tube has one group of inlet mouth to feed in the tank body, and spiral blowing device and following pair clock are equipped with in the tank body bottom.Adopt two clock blowing structures can guarantee the temperature and pressure of tank body inner vapor.

Adopt the present invention can realize the automatic continuous production that slag is handled, saving of work and time, the processing efficiency height, cost is low, and because of containing a certain amount of moisture in the slag in treating processes, can not cause the dust from flying phenomenon, and environmental pollution is little.

Four, description of drawings:

Accompanying drawing 1 is a steel slag modification shrend vapour cure new technological flow skeleton diagram;

Accompanying drawing 2 is a chain-belt type tray machine operation synoptic diagram;

Accompanying drawing 3 is vertical processor structure synoptic diagram;

Five, embodiment:

Be the Chemical Composition of our company's bessemer furnace slag below, Fe 23%, and O 20.5%, Fe ₂O ₃10.97%, CaO 45.16％，MgO?6.30％SiO ₂?22.65％，MnO?1.69％，Al ₂O ₃?2.71％。

Its slag processing technological flow is seen Fig. 1, and each flow process is carried out as follows:

1, hot steel slag adds modification agent after pouring slag ladle into, and modification agent comprises carbon powder of reducing agent, swelling agent lime carbonate and promoting agent calcium oxide etc., and wherein the carbon dust add-on is 3% (because of FeO content is 20.5%) of total amount, the calcium oxide add-on is 2% of a total amount.(lime carbonate does not add)

2, see that Fig. 2 hot steel slag enters chain-belt type tray machine 11 from slag ladle 14 telophragma 13 of flowing through, cast 200 * 200 * 20 millimeters clinker, when the clinker surface solidification, shower nozzle 12 chillings are fetched water, and the pressure of fetching water is greater than 0.3MPa.

3, magnetic separation: the slag fragment after the economy-combat water quick cooling is handled is through separating by magnetic bodies, the steel scrap piece sucking-off that purity is higher.

4, hydrolysis treatment: the slag of magnetic separation sent in the vertical treater with feeding cart be hydrolyzed, feeding vapour temperature should be greater than 78 ℃, and vapor pressure should be less than 0.1MPa, and the treatment time should be greater than 12 hours.

5, magnetic separation screening: the slag that comes out from vertical treater through the magnetic separation of magnetic roller after, sending into the sieve end is the screening plant of 20 * 20 millimeters grids, can make flux and pavior greater than 20 millimeters slags.

6, hammer is broken: send hammer-crusher to pulverize in the slag that sieves.

7, secondary magnetic separation, screening: the slag after will hammering into shape broken carries out the magnetic separation of magnetic roller once more, select for use greater than 5 * 5 less than sieving at 20 * 20 millimeters grids sieve ends according to different purposes then, medium grain can be used as cement material.

8, ball mill pulverizing: the slag behind the regrading is sent into ball mill pulverize again.

9, carry out magnetic roller magnetic separation for the third time.

10, send ultra-fine vibrating mill to grind, become powder, finish the processing of the finished product, fine powder useful as concrete Additive.

For realizing above-mentioned technology, required specific equipment comprises chain-belt type tray machine and vertical treater, chain-belt type tray machine 11 its shape and structures are identical with pig-casting machine, (see figure 2), vertical treater (see figure 3) by tank body 1, hopper 2, go up two clock 3, steam endless tube 5, spiral blowing device 6, following pair clock 7 and feed bins 8, diffuse valve more than 4 parts and form, two clocks are housed between elevating hopper and the tank body, tank body is provided with and diffuses valve and steam endless tube, endless tube has one group of inlet mouth to feed in the tank body, and spiral blowing device and following pair clock are equipped with in the tank body bottom.

Claims

1, a kind of steel slag modification shrend vapour cure novel process is characterized in that:

1. hot steel slag adds modification agent after pouring slag ladle into, modification agent comprises carbon powder of reducing agent, swelling agent lime carbonate and promoting agent calcium oxide etc., its carbon dust add-on should be less than 17% of ferrous oxide content in the slag, the add-on of lime carbonate should be less than 2% of slag total amount, with excessive being as the criterion not, the add-on of calcium oxide should can fusion be gone in the slag liquid to exceed to add pan feeding less than 5% of slag total amount;

2. hot steel slag enters chain-belt type tray machine from the slag ladle telophragma of flowing through, and casts the clinker of certain specification size, when the clinker surface solidification, and the chilling of can fetching water, the pressure of fetching water should be greater than 0.3MPa;

3. magnetic separation: the slag fragment after the economy-combat water quick cooling is handled is through separating by magnetic bodies, the steel scrap piece sucking-off that purity is higher;

4. hydrolysis treatment: the slag of magnetic separation sent in the vertical treater be hydrolyzed, slag feeds steam in treatment tank, and vapour temperature should be greater than 78 ℃, and vapor pressure should be less than 0.1MPa, and the treatment time should be greater than 12 hours;

5. magnetic separation screening: the slag that comes out from vertical treater carries out magnetic separation through the magnetic roller, with sending the screening plant screening after the sucking-off of steel scrap grain, can select for use at the bottom of the sieve greater than 20 * 20 millimeters grids;

6. hammer is broken: send hammer-crusher to pulverize in the slag that sieves;

7. secondary magnetic separation, screening: the slag after will hammering into shape broken carries out the magnetic separation of magnetic roller once more, carries out regrading then, can select for use greater than 5 * 5 less than 20 * 20 millimeters the grid sieve end;

8. ball mill pulverizing: the slag behind the regrading is sent into ball mill pulverize again;

9. carry out magnetic roller magnetic separation for the third time;

10. send ultra-fine vibrating mill to grind, become powder, finish the processing of the finished product.

2, the required specific equipment of a kind of steel slag modification shrend vapour cure novel process comprises chain-belt type tray machine and vertical treater, it is characterized in that:

1. its shape of chain-belt type tray machine, structure are identical with pig-casting machine;

2. vertical treater is by tank body, hopper, upward two clock, steam endless tube, spiral blowing device, following pair clocks and expect logical sequence, diffuse several parts of valve forms, two clocks are housed between elevating hopper and the tank body, tank body is provided with and diffuses valve and steam endless tube, endless tube has one group of inlet mouth to feed in the tank body, and spiral blowing device and following pair clock are equipped with in the tank body bottom.