CN102527494A - Technological method for screening sand from rock powder - Google Patents

Abstract

The invention relates to a technological method for screening sand from rock powder, characterized by adopting the following steps of: screening and washing processing and construction waste with water to separate coarse sand, fine sand, mud powder and water, delivering the separated coarse sand into a crusher and adding water for crushing; separating the mixture of the screened sand, mud powder and water; as sand with big specific gravity in the mixture of sand, mud powder and water flowing into a separator sinks, discharging natural sedimentation from a bottom pipeline; as the mud water mixture with small specific gravity flows upwards under the effects of vortex and incoming water flow, discharging natural sedimentation from the upper part of the separator; and obtaining sand as the finished sand after sedimentation. The technological method for screening sand from rock powder solves the problem of environmental pollution caused by waste in a quarry, and utilizes the rock powder containing dust, fine sand and coarse sand in the quarry as raw material to produce construction sand, thus solving the problem of resource tension in natural fine aggregate and reducing environmental pollution.

Description

A kind of stone flour selects the sand process

Technical field

The present invention relates to a kind of process of utilizing stone flour that the rubble field contains dust, fine sand and coarse sand for the raw material production building sand, particularly a kind of stone flour washed-out sand process.

Background technology

At present; It is the discarded object in producing that the stone flour of discharging is produced in domestic quarrying, includes dust, fine sand and coarse sand, because annual emissions is big; A large amount of waste stone powders will cause problem of environmental pollution; Not only will take a large amount of soils as the discharging field, and the wasting manpower and material resources safeguards again, includes dust, fine sand can cause second environmental pollution.And the fast development of current economic construction, the consumption of building sand increases year by year, and the minority area has occurred at present that there is lack of raw materials, exhaustion, and supply situation is also relatively more nervous.The excessive collection of placer of cutting into a mountain for quarrying, pick up, not only will destroy a large amount of arable lands every year, causes soil erosion, and can work the mischief to environment, the heavy damage ecological balance and natural landscape.

Summary of the invention

The present invention has overcome the defective of above-mentioned existence, and purpose is to advance processed for solving the discarded object stone flour that quarrying, the production of rubble field are discharged, and a kind of stone flour washed-out sand process is provided.

Stone flour washed-out sand process content Description of the present invention:

Stone flour washed-out sand process of the present invention is characterized in that: stone flour washed-out sand process adopts the following step:

(1), will screen and wash at the discarded object during processing rubble for building is produced, isolate coarse sand, fine sand, mud powder and water, the coarse sand of separating is sent into disintegrating machine adds the water fragmentation;

(2), the coarse sand after the fragmentation returns disintegrating machine, carries out second-time breakage and screening, washing, the mixture of the sand of selecting, mud powder and water carries out separating treatment with the mixture of the sand, mud powder and the water that screen, wash out for the first time;

(3), the mixture that flows to sand, mud powder and the water of separator produces eddy flow in separator, heavy sand rises and falls downwards, goes out natural sedimentation from the row of conduits of bottom;

(4), the mud mixture of light specific gravity flows to top by the effect of the current of eddy current and entering, discharges natural sedimentation from the top of separator, is finished sand through the sand of post precipitation.

Stone flour washed-out sand process of the present invention; Solved quarrying, the rubble field produces the discarded object of discharging and causes problem of environmental pollution; Utilize the stone flour that dust, fine sand and coarse sand are contained in the rubble field to be the raw material production building sand; Solve the natural fine nervous problem of resource of gathering materials, reduced the stacking occupation of land and the problem of environmental pollution of quarrying, rubble field waste.Realize the material circulation that building sand is produced, the architecture engineering material that makes China is to low-carbon (LC), green, energy-saving and environmental protection development, and its aboundresources can be gathered materials on the spot remarkable in economical benefits.

The specific embodiment

Do below stone flour washed-out sand process of the present invention is achieved in that and specify.Stone flour washed-out sand process of the present invention adopts the following step: will screen and wash at the discarded object during processing rubble for building is produced, isolate coarse sand, fine sand, mud powder and water, the coarse sand of separating is sent into disintegrating machine add the water fragmentation; Coarse sand after the fragmentation returns disintegrating machine, carries out second-time breakage and screening, washing, the mixture of the sand of selecting, mud powder and water, and the mixture of sand, mud powder and the water that screens, washes out for the first time together carries out separating treatment; The mixture that flows to sand, mud powder and the water of separator produces eddy flow in separator, heavy sand rises and falls downwards, goes out natural sedimentation from the row of conduits of bottom; The mud mixture of light specific gravity is flowed to top by the effect of the current of eddy current and entering, discharges natural sedimentation from the top of separator, and the sand of process post precipitation is finished sand.

The discarded object that contains dust, fine sand and coarse sand that at first the rubble field is filtered out in processing rubble production for building screens and washes through special equipment stone flour sand washer, isolates fine sand, mud powder and water; Send the coarse sand of separating to hammer mill again it is added the water fragmentation; Screen once more after the fragmentation and wash; The coarse sand that filters out returns the disintegrating machine inlet through the backflow belt conveyor; Carry out fragmentation once more, the mixture of sand, mud powder and water that sand, mud powder and the water that postsearch screening, washing are come out screens, washes out for the first time together flows into separator together and carries out separating treatment; The vortex inner separation recycling device is set in roto-clone separator and supplies the clear water device; The mixture moment that flows to sand, mud powder and the water of separator produces eddy flow in separator; Heavy sand facies are sink-float down; Clear water with getting into mixes, and discharges from the pipeline of bottom, flows to sand water sedimentation pond natural sedimentation; Because the mixture of the sand, mud powder and the water that flow into is greater than the discharge capacity of end mouth; Therefore the mud mixture of light specific gravity receives the effect of the current of eddy current and bottom entering; Naturally upwards shove, discharge from the top of separator, through the muddy water natural sedimentation of muddy water delivery pipe outflow.Be through the sand of post precipitation that finished sand, mud powder are used to improve the soil, water can recycle.

Claims (1)

1. stone flour washed-out sand process is characterized in that: stone flour washed-out sand process adopts the following step:

(1), will screen and wash at the discarded object during processing rubble for building is produced, isolate coarse sand, fine sand, mud powder and water, the coarse sand of separating is sent into disintegrating machine adds the water fragmentation;

(2), the coarse sand after the fragmentation returns disintegrating machine, carries out second-time breakage and screening, washing, the mixture of the sand of selecting, mud powder and water carries out separating treatment with the mixture of the sand, mud powder and the water that screen, wash out for the first time;

(3), the mixture that flows to sand, mud powder and the water of separator produces eddy flow in separator, heavy sand rises and falls downwards, goes out natural sedimentation from the row of conduits of bottom;

(4), the mud mixture of light specific gravity flows to top by the effect of the current of eddy current and entering, discharges natural sedimentation from the top of separator, is finished sand through the sand of post precipitation.