CN1792944A

CN1792944A - Process for producing silicate cement chamotte by blast furnace liquid residue and apparatus thereof

Info

Publication number: CN1792944A
Application number: CNA2005101366675A
Authority: CN
Inventors: 刘继清
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-30
Filing date: 2005-12-30
Publication date: 2006-06-28
Anticipated expiration: 2025-12-30
Also published as: CN100391882C

Abstract

A method and apparatus for preparing the silicate cement clinker from the liquid-state slag of blast furnace is disclosed. Said method includes such steps as pouring said liquid-state slag from slag ladle into intermediate ladle, continuously flowing in mixer while feeding the correcting material and fuel respectively from their cabins to the mixer via pipes, calcining to become molten cement clinker, cooling in cooling tower, discharging product, and exhausting the hot air to the heat-tube over-heater or heat exchanger to generate steam.

Description

Produce the method and the device thereof of Portland clinker with blast furnace liquid residue

Technical field

The present invention relates to a kind of method and apparatus of producing cement clinker, relate in particular to a kind of method and device thereof that utilizes the metallurgy high furnace liquid slag to produce Portland clinker, belong to B28B11/00 class or C04B7/02 class.

Background technology

Produce existing complete production technique and the relevant device of silicate cement at present, the main technique flow process is: mining, fragmentation, batching, raw grinding, calcining and grog grinding.The production cost of wherein mining, fragmentation, batching and calcining process accounts for about 80% of total cost of production, and this production technique and equipment have satisfied the production needs, but the mining in the cement production process destroys physical environment, and calcining consumes a large amount of energy.For the processing of the blast furnace liquid residue that metallurgy high furnace produced, common process is a water quenching technology, is about to blast furnace liquid residue and becomes blast furnace granulated slag, and this treatment process need consume a large amount of water, and 1 ton of blast furnace granulated slag of shrend needs 10～20 tons of water.Though the water reusable edible need consume other energy again in the recycle process; Though the blast furnace granulated slag that is produced can be used as the Additive of cement in addition, actual blending amount only is about 15%, a large amount of blast furnace granulated slag or pile up and bring very big burden to environmental protection, or sell at a low price, bring financial loss to enterprise; Remove this, to blast furnace liquid residue being become the steam that is produced in the blast furnace granulated slag process and the heat that distributes is not fully used, cause great energy dissipation at most of smelter.

As everyone knows, the major ingredient of silicate cement is: CaO=60～67%, SiO ₂=20～24%, Al ₂O ₃=4～9%, Fe ₂O ₃=2.6～6.0%, MgO＜5%.Learn that from analysis the blast furnace liquid residue composition is: CaO～38%, SiO ₂～34%,

Al ₂O ₃～14％、FeO～0.4％、MgO～8％、Fe ₂O ₃～1.2％。As long as the raw material supply of metallurgy high furnace is stable and too great fluctuation process does not take place the working of a furnace, the composition fluctuation of blast furnace liquid residue is little.Can tentatively draw from the composition contrast: as long as blast furnace liquid residue, add CaO or CaCO ₃To improve CaO content, the reduction SiO in the blast furnace liquid residue ₂With Al ₂O ₃The content that reaches MgO just can make the composition of mixture satisfy the fundamental component requirement of Portland clinker, just might produce qualified silicate cement.

Summary of the invention

For solving the technical problem that prior art exists, the invention provides a kind of correction material that utilizes metallurgy high furnace liquid slag and preheating or predecomposition and fuel mix evenly, be sintered into cement clinker and with its cooling method of producing Portland clinker fast, the present invention simultaneously also provides a cover to implement the device of this method.

For achieving the above object, the technical solution used in the present invention is: blast furnace liquid residue is packed in the blast furnace slag ladle, and the blast furnace liquid residue in blast furnace slag is irritated is poured tundish again into, and the blast furnace liquid residue in the tundish flows into mixing tank continuously and stably through the blast furnace slag mouth of a river; Simultaneously will be the correction material based on unslaked lime of preheating fill and proofread and correct feed bin, open and be installed on the correction material that the proportioner of proofreading and correct the feed bin bottom will proofread and correct in the feed bin and be added in the mixing tank continuously and stably by calculating weight percent well.Opening installation is sent into fuel in the mixing tank continuously and stably at the fuel tube of cover middle part, rotates to become the fused solution grog after mixing tank makes blast furnace liquid residue, correction material and fuel mix, calcine in mixing tank.Fused solution grog in the mixing tank becomes strip or wire falls in the cooling tower through the feed opening of mixing tank bottom avris, and bar shaped and linear grog heat interchanging area are big, are easy to quick cooling.The vacuum fan that unlatching links to each other with induced exhaust, cool ambient air is entered in the cooling tower from cooling tower bottom and top, the grog that falls in the cooling tower is cooled off, dropped on the handling equipment (as belt) of cooling tower bottom by rapid refrigerative grog gravitate in cooling tower.Remove this, the periphery in cooling tower inside is equipped with heat pipe superheater and hot tube heat exchanger, and the part heat of air makes the water heating or becomes steam and offers the user in their absorption cooling towers.

That adopts that as above technical scheme provides produces the method and the device thereof of Portland clinker with blast furnace liquid residue, and compared with prior art, its advantage is:

1. make full use of the mineral component and the heat energy of blast furnace liquid residue, saved the mining of grog or joined the calcination process of ore deposit, raw grinding and raw material, reduce energy consumption;

2. utilize and reclaim the heat energy of blast furnace liquid residue, the intake that makes whole production process is less than the output energy, and promptly energy consumption is outwards carried heat energy (as steam or hot water) for negative one;

3. incinerating cement clinker major part or 100% is the high-temperature fusion attitude in mixing tank, its uniform ingredients, and tricalcium silicate content height, and free calcium oxide (being f-CaO) content is low, helps improving the silicate cement quality;

4. because of containing Al in the blast furnace liquid residue ₂O ₃Higher (Al ₂O ₃=14～16%), the present invention has adopted in cooling tower the liquid towards grog to carry out the exhausting cooling, and speed of cooling is fast, has reduced tricalcium silicate (C ₃S) to Dicalcium Phosphate (Feed Grade) (C ₂S) conversion at the grog mesosilicic acid three calcium contents height that generate, helps improving the quality of silicate cement;

5. hot tube heat exchanger and heat pipe superheater have been adopted, they have directly reclaimed the heat except that drying and preheating or the required heat energy of predecomposition correction material in cooling tower, can produce high-quality steam makes other purposes on the one hand, can reduce the cost of cooling draught on the other hand;

6. can reduce production line construction investment and land used about 60%;

7. can reduce the blast furnace slag flushing water consumption about 90%.

Description of drawings

Accompanying drawing is of the present invention with the method for blast furnace liquid residue production Portland clinker and the equipment mounting arrangements synoptic diagram of device thereof, also is specification digest accompanying drawing of the present invention.

Embodiment

Be described in further detail below in conjunction with the embodiment of accompanying drawing invention.

As shown in drawings, implementing the device of producing the Portland clinker method with blast furnace liquid residue of the present invention is made up of blast furnace slag ladle 1, fume pipe 2, tundish 3, the blast furnace slag mouth of a river 4, correction feed bin 5, proportioner 6, fuel tube 7, cover 8, mixing tank 9, revolution support 10, induced exhaust 13, cooling tower 14, heat pipe superheater 16, hot tube heat exchanger 17 or 18,

pipeline

19 or 20 or 23 or 24, drum 22 and handling equipment 25.Bottom one end of tundish 3 has the blast furnace slag mouth of a river 4, and of the blast furnace slag mouth of a river 4 stretches in the cover 8.Hook the hook of blast furnace slag ladle 1 with driving, allow blast furnace liquid residue pour in the tundish 3 from blast furnace slag ladle 1, the high-temperature liquid state slags in the tundish 3 flow into mixing tank 9 continuously and stably through the blast furnace slag mouth of a river 4.Be set with fuel tube 7 on cover 8, fuel (as coal dust, coke powder or other geseous fuel) can enter mixing tank 9 through fuel tube 7.Fume pipe 2 also is sleeved on the cover 8, and fume pipe 2 proportioners 6 are equipped with correction feed bin 5 on the next door of fume pipe 2, and proofreading and correct feed bin 5 is the container of cone shape or square cone-shaped.The correction material of major part preheating (as CaO etc.) is put into and proofreaied and correct feed bin 5, join continuously and stably in the mixing tank 9 through proportioner 6 precentagewise weight.The correction material that adds mixing tank 9 through proportioner 6 can be selected from the weight ratio that flows into the high-temperature liquid state slag of mixing tank 9 from tundish 3: 1000 kilograms of (promptly 1 ton) high-temperature liquid state slags are proofreaied and correct with addition of 500～1100 kilograms and are expected that correction material described herein is based on unslaked lime.Wherein the blast furnace slag mouth of a river 4 and proportioner 6 are prior art, and blast furnace slag ladle 1 and tundish 3 can utilize existing steel-making molten steel jar and continuous casting tundish.Rotate mixing tank 9, flow into from the blast furnace slag mouth of a river 4 mixing tanks 9 blast furnace liquid residue with enter the fuel in the mixing tank 9 from fuel tube 7 and mix at mixing tank 9 from the correction material three that proportioner 6 is put into mixing tank 9, the calcining back forms the fused solution cement clinker, the flue gas that is produced in the mixed calcining process is discharged by fume pipe 2, and the hot gas that is produced can further heat the correction material from proportioner 6 again.Put into per 1000 kilograms (promptly 1 ton) of mixing tank 9 from proportioner 6 and proofread and correct material with addition of 20～100 kilograms of fuel from gas line 7.Mixing tank 9 is placed on revolution and supports on 10, and the rotation of revolution support 10 can drive mixing tank 9 and rotate, and can work the effect of mixing to the fused solution grog in the mixing tank 9.Bottom or bottom side at mixing tank 9 circumferentially are evenly distributed with the individual feed opening 11 of N (N 〉=2).Fused solution grog in the mixing tank 9 flows out through feed opening 11 and becomes bar shaped or linear grog falls in the cooling tower 14.Cooling tower 14 is positioned at mixing tank 9 times.Cool ambient air can be from the top of cooling tower 14 or the bottom enter in the cooling tower 14 bar shaped or the linear grogs that fall in the cooling tower 14 cooled off.Cooled bar shaped grog and fracture material thereof gravitate and descending in cooling tower 14, fall on the handling equipment (as belt) 25 that is installed on cooling tower 14 bottoms and send, outward flange at cooling tower 14 middle parts has the induced exhaust 13 that is installed on the annular passage, and induced exhaust 13 is connected in special-purpose vacuum fan.Open vacuum fan, the warm air of cooling tower 14 is discharged by induced exhaust 13.L (integer of L＞1) heat extraction pipe superheater 16, hot tube heat exchanger 17 or 18 are installed in cooling tower 14.An inlet end that connects hot tube heat exchanger 18 of pipeline 19, external water coolant can enter hot tube heat exchanger 18 through pipeline 19, the two ends of pipeline 20 are connected with the exit end of hot tube heat exchanger 18 and the inlet end of hot tube heat exchanger 17 respectively, water absorbs in the cooling tower 14 through hot tube heat exchanger 18 and enters hot tube heat exchanger 17 by pipeline 20 behind the part heat in the warm air like this, the back of further heating up again forms the mixture of steam and water, steam water interface through being communicated in hot tube heat exchanger 17 exit end and the pipeline 21 between the drum 22 send into drum 22.Two of pipeline 23 is connected with the inlet end and the drum 22 of heat pipe superheater 16 respectively, steam in the drum 22 enters in the heat pipe superheater 16 through pipeline 23 and further absorbs heat and form saturated superheated vapour like this, and the pipeline 24 through being connected in heat pipe superheater 16 exit end is supplied with users.

During enforcement, install, debug handy blast furnace liquid residue according to accompanying drawing and produce the Portland clinker device, to fill with the upper end of blast furnace slag ladle 1 handling (as driving) of blast furnace liquid residue to tundish 3 from the tap cinder scene, inclination blast furnace slag ladle 1 is poured blast furnace liquid residue wherein into tundish 3, blast furnace liquid residue in the tundish 3 flows to mixing tank 9 continuously and stably, opens proportioner 6 simultaneously and injects the correction material continuously and stably from proofreading and correct feed bin 5 in mixing tank 9.The calcium oxide that described correction material is preheating (CaO, i.e. unslaked lime), its injection rate are that per 1000 kilograms of blast furnace liquid residues are joined 500～1100 kilograms of correction material, specifically according to CaO in the blast furnace liquid residue or SiO ₂Or Al ₂O ₃Percentage composition adjust the add-on that it proofreaies and correct material.Add in mixing tank 9 as fuel such as coal dust or coke powders through fuel tube 7 simultaneously, its add-on is controlled at 1000 kilograms and proofreaies and correct material with addition of 20～100 kilograms of fuel.Behind mixed calcining, form the liquid cement clinker of high-temperature fusion.Mixing tank 9 is placed on revolution and supports on 10, rotates revolution and supports 10 promptly rotatable mixing tanks 9.Because the cover 8 on the mixing tank 9 is motionless, so the rotation of mixing tank 9 can make blast furnace liquid residue in the mixing tank 9, proofread and correct the distribution that material and fuel can be mixed into dynamic stability.The feed opening 11 of fused solution grog in the mixing tank 9 through mixing tank 9 bottoms flows out and becomes the bar shaped grog and fall in the cooling tower 14, and bar shaped and linear grog heat interchanging area are big, are easy to quick cooling.The vacuum fan that unlatching links to each other with induced exhaust 13 make cooling air from the bottom of cooling tower 14 or the top enter in the cooling tower 14 warm air discharged from induced exhaust 13, simultaneously grog is cooled off fast, like this tricalcium silicate (the C in the grog ₃S) can not decompose and become Dicalcium Phosphate (Feed Grade) (C ₂S), guarantee the quality of grog, also just guaranteed the quality of silicate cement.Unlatching is installed in the handling equipment 25 under the cooling tower 14, and cooled grog is sent.Enabling pipeline 19 makes water coolant enter hot tube heat exchanger 18, water absorbs in the cooling tower 14 through hot tube heat exchanger 18 and enters hot tube heat exchanger 17 by pipeline 20 behind the part heat in the warm air, the back of further heating up again forms the mixture of steam and water, steam water interface through being communicated in hot tube heat exchanger 17 exit end and the pipeline 21 between the drum 22 send into drum 22.Two of pipeline 23 is connected with the inlet end and the drum 22 of heat pipe superheater 16 respectively, steam in the drum 22 enters in the heat pipe superheater 16 through pipeline 23 and further absorbs heat and form saturated superheated vapour like this, and the pipeline 24 through being connected in heat pipe superheater 16 exit end is supplied with users.

Claims

1, a kind of method of producing Portland clinker with blast furnace liquid residue, it is characterized in that: inclination blast furnace slag ladle (1) is poured blast furnace liquid residue wherein in the tundish (3) into, blast furnace liquid residue in the tundish (3) flows to mixing tank (9), opens proportioner (6) and inject 500～1100kg/t slag correction material in mixing tank (9); In fuel tube (7) is in mixing tank (9), add 20～100kg/t and proofread and correct material fuel; Mixing tank (9) is placed on revolution and supports on (10), rotates mixing tank (9), and the fused solution grog in the mixing tank (9) becomes the bar shaped grog through feed opening (11) outflow and falls in the cooling tower (14); Opening the vacuum fan that links to each other with induced exhaust (13) makes cooling air cool off grog from the bottom or the top of cooling tower (14); Open handling equipment (25), cooled grog is sent; Enable pipeline (19) water of sending into hot tube heat exchanger (18,17) is heated after pipeline (21) is sent into drum (22), the steam water interface in the drum (22) becomes saturation steam and send the user by pipeline (24) after pipeline (23) is gone into heat pipe superheater (16).

2, a kind of device of implementing according to claim 1 with blast furnace liquid residue production Portland clinker method, it is characterized in that: bottom one end of tundish (3) has the blast furnace slag mouth of a river (4), on cover (8), be set with fuel tube (7), fume pipe (2), fume pipe (2) connection proportioner (6) has correction feed bin (5) on fume pipe (2) side; Mixing tank (9) is placed on revolution and supports on (10), circumferentially is evenly distributed with N discharge port (11) in the bottom or the bottom side of mixing tank (9); Cooling tower (14) is positioned under the mixing tank (9), and the outward flange at cooling tower (14) middle part has the induced exhaust (13) that is installed on the annular passage, and handling equipment (25) is installed on the exit of cooling tower (14) lower end; L heat extraction pipe superheater (16), hot tube heat exchanger (17,18) are installed in cooling tower (14); An inlet end that connects hot tube heat exchanger (18) of pipeline (19), the two ends of pipeline (20) are connected with the exit end of hot tube heat exchanger (18) and the inlet end of hot tube heat exchanger (17) respectively, an exit end that is communicated with hot tube heat exchanger (17) of pipeline (21), drum (22) is inserted in the other end, two of pipeline (23) is connected with the inlet end and the drum (22) of heat pipe superheater (16) respectively, and the exit end of heat pipe superheater (16) has pipeline (24) to link to each other.