CN101417852A

CN101417852A - Red mud filter cake storage yard storing method and device

Info

Publication number: CN101417852A
Application number: CNA2008103045070A
Authority: CN
Inventors: 李明阳
Original assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Current assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Priority date: 2008-09-16
Filing date: 2008-09-16
Publication date: 2009-04-29

Abstract

The invention discloses a stacking-storage method of a red mud filter cake yard and a device; the method comprises: a primary dam is built on the yard, then a road for upper reservoir from the outside of the reservoir to the top of the primary dam is built, and a road around the reservoir is built on the primary dam; a main road inside the reservoir is built in the yard, dividing the whole yard into more than two districts, the bottom of each district is leveled to form a shape of sloping to the center from the surrounding and the center of the districts is provided with draining shafts; drainage pipes buried at the bottom of the reservoir are connected with draining shafts, and the drainage pipes are gathered in a water recycling tank outside the reservoir of the yard; burden distribution branches which are laid at each district are connected with the road around the reservoir or the main road inside the reservoir, and the ends of the burden distribution branches are provided with unloading platforms. The stacking-storage method and the device have the advantages that the transportation distance is reduced, transportation efficiency and operation efficiency are both improved, operating equipment needs are reduced, the red mud accumulation body has higher mechanical strength and stability and the storage method is good for environment protection, etc.

Description

The stacked arrangement of red mud filter cake yard and device

Technical field

The present invention relates to a kind of stacked arrangement and device of red mud filter cake yard, belong to the red mud filter cake yard red mud and store up technical field.

Background technology

Red mud is the waste residue that produces in the alumina producing, and except that can fully utilizing on a small quantity, each alumina producer all need be built special red mud dump and stack red mud.

The conveying of red mud and storing up, three kinds of modes are generally arranged: a kind of is that wet method is stored up, and the red mud slurry is piped to the stockyard with higher water ratio; A kind of is that dry method is stored up, and the red mud slurry is piped to the stockyard to be toothpaste-like than low-water-content; A kind of is that filter cake is stored up, and behind the filtering red mud filter cake is transported to the stockyard with automobile and stores up.

Store up with the dry method red mud slurry based on wet method in the domestic large-scale alumina producer at present and store up dual mode, will transport mode that filter cake stores up to the stockyard only in of the small scale aluminum oxide factory employing of annual capacities such as Kerry, Guizhou alumina producer, Nanchuan, Chongqing alumina producer, Chongqing WuLong's alumina producer with automobile behind the filtering red mud less than 150,000 tons.The method that above-mentioned small scale aluminum oxide factory is disposed filter cake is: earth dam is constructed at the mouth of a valley in small-sized mountain valley, filter cake is transported to behind the stockyard before the dam or dam tail discharging, with dozer filter cake is pushed away to divide being layered in the stockyard then, do not establish water exhaust system in the storehouse, rainwater is by spontaneous evaporation.

Along with the raising that national environmental protection requires, newly-built big-and-middle-sized alumina producer has and gradually adopts filter cake to store up the trend of mode.Big-and-middle-sized alumina producer annual capacity is generally all more than 400,000 tons, and year red mud quantity discharged is at 40-60 ten thousand tons, so storage space is generally more than tens hectares, much larger than small scale aluminum oxide factory.Carrying out filter cake on so large-scale stockyard stores up, can not simply apply mechanically the way of small scale aluminum oxide factory, reason is: operation can only be used crawl dozer on the red mud face, the speed of travel is slow, and economic haul is 50-100m, maximum 120-150m, operating efficiency is very low after exceeding 120m, if only on the dam or dam tail discharging, filter cake be spread out cloth needs a large amount of dozers in the stockyard, the stockyard working cost is very high; The vertical rainfall amount in large-scale stockyard is big, and outside untimely discharge storehouse, storehouse inner product water excess can reduce red mud layer intensity, influences the job safety of dozer; In addition, big-and-middle-sized alumina producer filter cake carrier vehicle is many, and the meeting that need as far as possible reduce vehicle improves conveying efficiency.

Summary of the invention

The objective of the invention is to: a kind of stacked arrangement and device that is applicable to the red mud filter cake yard of large-scale red mud filter cake yard is provided, and it can make carrier vehicle unobstructed travelling in the stockyard, reduces meeting; Dozer is moved in economic haul, reduce dozer quantity simultaneously as far as possible, improve operating efficiency; Increase the red mud volume of cargo in storage of unit storage capacity; In time drain rainwater simultaneously, keep red mud face drying.

The stacked arrangement of red mud filter cake yard of the present invention is built initial dam in the stockyard, builds then outside the storehouse to the last storehouse road at initial dam top, builds ring storehouse road in the early stage on the dam; In the stockyard, build major trunk roads in the storehouse, whole stockyard be divided into sub-district more than 2, with the bottom of each sub-district smooth be from around the shape at aspect center, at center of housing estate draining shaft is set; Connect each draining shaft with the water shoot that is embedded in the bottom of the reservior, water shoot is pooled to the back pool outside the storehouse, stockyard; In each sub-district, lay the cloth branch road, major trunk roads in cloth branch road shack storehouse road or the storehouse, and discharging platform is set at the end of cloth branch road.

The stacked arrangement of above-mentioned red mud filter cake yard, the automobile of transportation red mud enters the stockyard from last storehouse road, along major trunk roads, cloth branch road in ring storehouse road, the storehouse, arrive specified discharging platform discharging with nearest route, the red mud filter cake that unloads at discharging platform, after airing and rolling, the last layer filter cake can pave; Roll and keep the red mud laminar surface to have the gradient of aspect center of housing estate draining shaft in the process.

The stacked arrangement of above-mentioned red mud filter cake yard, when the red mud face of stacking when the sub-district rises to the top of major trunk roads in initial dam, the storehouse, cloth branch road, discharging platform, push the position of red mud major trunk roads, cloth branch road, discharging platform in the initial dam that need increase, the storehouse in the storehouse with dozer, roll the maximum dry density of red mud then repeatedly with compactor, and increase draining shaft, filter cake can be continued upwards to store up in the stockyard.

Red mud filter cake yard store up device, build initial dam 1 in the stockyard, initial dam 1 top is provided with the last storehouse road 2 that is connected in the storehouse outside, builds on the dam 1 in the early stage and encircles storehouse road 3; In the stockyard, build major trunk roads 4 in the storehouse, whole stockyard be divided into sub-district more than 2, with the bottom of each sub-district smooth be from around the shape at aspect center, at center of housing estate draining shaft 9 is set; Connect each draining shaft 9 with the water shoot 10 that is embedded in the bottom of the reservior, water shoot 10 is pooled to the back pool 11 outside the storehouse, stockyard; In each sub-district, lay cloth branch road 5, major trunk roads 4 in cloth branch road 5 shack storehouse roads 3 or the storehouse, and discharging platform 6 is set at the end of cloth branch road 5.

Above-mentioned red mud filter cake yard store up device, the part 12 that the two ends of major trunk roads 4 are connected with ring storehouse road 3 in the storehouse, its gradient is less than 8%.

Above-mentioned red mud filter cake yard store up device, the spacing of discharging platform 6 is 120～180 meters in the sub-district.

Compare with the existing small scale aluminum oxide factory red mud filter cake technology of storing up, the red mud filter cake that the present invention has following innovation to adapt to big-and-middle-sized alumina producer is stored up needs: the dendritic bonded road network of ring-type is set in the storehouse has reduced shipment distance, improve conveying efficiency; Major trunk roads are divided into several relatively independent sub-districts with the stockyard in the storehouse by being provided with, but a certain sub-district piles with other sub-district normal operation when increasing; By the cloth branch road is set, discharging platform is divided into some operation units with each microzonation, and dozer is moved in economic haul all the time, has improved operating efficiency, and according to the platform number of the element number reasonable disposition dozer of while operation; Red mud filter cake through paving, airing, the flow process that rolls, improved accumulation unit weight, thereby the red mud amount that the stockyard can be held has improved more than 10%, make the red mud accumulation body that higher mechanical strength and stability be arranged; Rational water exhaust system is set, has reduced the residence time of rainwater in the stockyard, not only guaranteed the traffic safety of Work machine, also reduced the alkali in the red mud and the duration of contact of rainwater, help environment protection.

Description of drawings

Accompanying drawing 1 is a structural representation of the present invention.

Embodiment

Embodiments of the invention: at first, build initial dam 1 in the stockyard, build 2 last storehouse roads 2 to initial dam 1 top outside the storehouse then, ring storehouse road 3 is built at 1 top, dam in the early stage again.Then, build major trunk roads 4 in the storehouse, whole stockyard is divided into several sub-districts.The bottom of each sub-district is smooth be from around the shape at aspect center, at center of housing estate draining shaft 9 is set.Connect each draining shaft 9 with the water shoot 10 that is embedded in the bottom of the reservior, surface, stockyard rainwater flows to water shoot 10 by draining shaft 9 during rainfall, is pooled to back pool 11 again.The water that reclaims can use with the pumped back alumina producer.With ring storehouse road 3 and Ku Nei major trunk roads 4 is starting point, extends some cloth branch roads 5 in each sub-district, and at the end of cloth branch road 5 circular discharging platform 6 is set.The gradient of cloth branch road 5 is less than 8%.

The part 12 that the two ends of major trunk roads 4 are connected with ring storehouse road, the gradient is less than 8%.Rest part except that two ends, elemental height are 2m.

The spacing of discharging platform 6 is 120～180m, and it is better to be set to 150m.The elemental height of discharging platform 6 is 2m, the satisfied needs of the automobile of red mud filter cake at discharging platform modulation 6 last time head that transport of diameter.

With discharging platform 6 is the center, and each microzonation is divided into some operation units, and each operation unit paves in turn, airing, compacting operation.Specific practice is: each sub-district according to from around to the propulsive operation unit that uses in order in center, the automobile of transportation red mud enters the stockyard from last storehouse road 2, along major trunk roads 4, cloth branch road 5 in ring storehouse road 3, the storehouse, arrive specified discharging platform 6 dischargings with nearest route, reverse end for end to go up storehouse road 2 from another then and return plant area, once more entrucking transportation filter cake by fixed route.Red mud filter cake in that discharging platform 6 unloads paves in operation unit with dozer 7, and when the filter cake ulking thickness in the operation unit reached 0.5m, this unit stopped discharging, changed the airing state over to, and discharging, paving operation turn to next operation unit to carry out.When water ratio 23%-26% is arrived in the red mud filter cake airing of operation unit, roll with compactor 8, improve the dry density and the mechanical strength of red mud layer, finish a work flow of this operation unit, this operation unit last layer filter cake that can pave repeats above-mentioned flow process.Other operation unit is also by this flow operations.Rainwater will keep the red mud laminar surface to have the gradient of aspect center of housing estate draining shaft 9 in the operating process, so that can in time be discharged to back pool 11.When the red mud ulking thickness of a sub-district reaches 2m, can change next sub-district over to by above-mentioned flow process operation, constantly circulation.When the red mud face of a certain sub-district rises to the top of major trunk roads 4 in the storehouse, cloth branch road 5, discharging platform 6, the position of the red mud that pushes water ratio 23%-26% in the storehouse with dozer 7 major trunk roads 4, cloth branch road 5, discharging platform 6 in the storehouse that need increase, roll maximum dry density repeatedly with compactor 8 then near red mud, once increase 2m, guarantee that the intensity of above-mentioned transport passage satisfies the current requirement of loaded vehicle.After the initial dam 1 of a certain sub-district piles with, roll with the dried red mud of compacting and to construct Zi Ba, add major trunk roads 4, cloth branch road 5 and discharging platform 6 in the high basin, and increase draining shaft 9, filter cake can be continued upwards to store up in the stockyard.

Claims

The stacked arrangement of [claim 1] a kind of red mud filter cake yard is characterized in that: build initial dam in the stockyard, build then outside the storehouse to the last storehouse road at initial dam top, build ring storehouse road in the early stage on the dam; In the stockyard, build major trunk roads in the storehouse, whole stockyard be divided into sub-district more than 2, with the bottom of each sub-district smooth be from around the shape at aspect center, at center of housing estate draining shaft is set; Connect each draining shaft with the water shoot that is embedded in the bottom of the reservior, water shoot is pooled to the back pool outside the storehouse, stockyard; In each sub-district, lay the cloth branch road, major trunk roads in cloth branch road shack storehouse road or the storehouse, and discharging platform is set at the end of cloth branch road.
The stacked arrangement of [claim 2] red mud filter cake yard according to claim 1, it is characterized in that: the automobile of transportation red mud enters the stockyard from last storehouse road, along major trunk roads, cloth branch road in ring storehouse road, the storehouse, arrive specified discharging platform discharging, the red mud filter cake that unloads at discharging platform, after airing and rolling, the last layer filter cake can pave; Roll and make the red mud laminar surface have the gradient of aspect center of housing estate draining shaft in the process.
The stacked arrangement of [claim 3] red mud filter cake yard according to claim 2, it is characterized in that: when the red mud face of stacking when the sub-district rises to the top of major trunk roads in initial dam, the storehouse, cloth branch road, discharging platform, push the position of red mud major trunk roads, cloth branch road, discharging platform in the initial dam that need increase, the storehouse in the storehouse with dozer, roll the maximum dry density of red mud then repeatedly with compactor, and increase draining shaft, filter cake can be continued upwards to store up in the stockyard.
The stacked arrangement of [claim 4] red mud filter cake yard according to claim 1 is characterized in that: the water of back pool uses with the pumped back alumina producer.
[claim 5] a kind of red mud filter cake yard store up device, it is characterized in that: build initial dam (1) in the stockyard, initial dam (1) top is provided with the last storehouse road (2) that is connected in the storehouse outside, builds on dam (1) in the early stage and encircles storehouse road (3); In the stockyard, build major trunk roads in the storehouse (4), whole stockyard be divided into sub-district more than 2, with the bottom of each sub-district smooth be from around the shape at aspect center, at center of housing estate draining shaft (9) is set; Connect each draining shaft (9) with the water shoot that is embedded in the bottom of the reservior (10), water shoot (10) is pooled to the back pool (11) outside the storehouse, stockyard; In each sub-district, lay cloth branch road (5), major trunk roads (4) in cloth branch road (5) shack storehouse road (3) or the storehouse, and discharging platform (6) is set at the end of cloth branch road (5).
[claim 6] red mud filter cake yard according to claim 5 store up device, it is characterized in that: the part (12) that the two ends of major trunk roads in the storehouse (4) are connected with ring storehouse road (3), its gradient is less than 8%.
[claim 7] red mud filter cake yard according to claim 5 store up device, it is characterized in that: the spacing of discharging platform in the sub-district (6) is 120～180 meters.