SU1763666A1 - Transportation method in cyclic-flow know-how - Google Patents

Abstract

The invention relates to mining and allows separate transportation of several types of minerals from a quarry along a single conveyor path during the development of steeply dipping deposits. The purpose of the invention is to provide a shift productivity of a quarry for the extraction of raw materials of various compositions while ensuring separate transportation for storage. On the existing concentration horizon there is a transshipment point equipped with storage hoppers with vibrating feeders in the amount corresponding to the number of varieties of minerals mined. Each bunker serves one type of extracted mineral, fossil. The unloading of the production bins is 1-1 consecutively after they have been filled up to 50-100% with a time interval allowing rotation and installation of the console of the unloading device on the surface, which ensures the storage of each type of mineral in the required place. 2 Il. ъ / Ё

Description

The invention relates to the mining industry and can be used in the open pit mining of mineral deposits.

Known methods of field development using cyclical technology schemes, including excavator loading and separate transportation of various types of minerals by road or rail (M.G. Novozhilov and others. Technologists of open-pit mining of mineral deposits M., Nedra, 1971, part 2, C. 252-262).

The disadvantage of these separate transport methods is:

- a significant increase in operating costs with an increase in the depth of development, which is caused by the need to arrange transshipment points for vehicles in rail transport, since the introduction of railway transport to the lower horizons of steeply dipping fields is difficult.

The closest in essence and the achieved result is the use of cyclic-flow technology with the use of conveyor transport in schemes with bunker overload (see, for example, Cyclic-flow ore mining technology at the Krivbass open-pit mines. Tech.

h about

00

so about

Nika. 1978. auth. Tartakovsky V.N. and others. P.55-11).

The disadvantage of this method in comparison with the proposed one is that it does not ensure separate delivery of various types of minerals to the surface by one conveyor.

The aim of the invention is to provide interchangeable performance of the quarry for the extraction of raw materials of different composition while ensuring its separate transportation for storage in the required place.

The goal is achieved by the fact that on the existing concentration horizon there is a transshipment point, equipped with storage hoppers with vibrating feeders in an amount corresponding to the number of types of minerals mined. Each bunker serves one type of mined mineral. The bunkers are unloaded sequentially after they have been filled up to 50-100% with an interval of time allowing rotation and installation of the console of the unloading device on the surface, which ensures that each type of mineral is stored in the required place.

Distinctive features of the proposed solution are:

- the number of bins set corresponding to the number of varieties of the transported raw materials;

- loading of the bunker is carried out with raw material of one composition for 50-100% of its volume;

The unloading of the bins is carried out sequentially with a time interval allowing for the unloading of raw materials to a new place on the surface.

From other sources, only certain elements of the distinguishing features of the claimed technical solution are known, but none of them allows achieving the desired goal: ensuring the separate transportation of several types of minerals from the quarry along one conveyor path.

The exclusion of at least one of the signs makes the whole method impracticable. Therefore, the features distinguishing the claimed method from the prototypes are significant,

Figures 1 and 2 illustrate the proposed method.

The separate transportation of various types of mineral raw materials from the quarry is carried out as follows. On the concentration horizon, an overloading point (PP) is equipped, consisting

0

five

0

five

0

five

0

five

from storage hoppers system (1). Each type of raw material to be transported to the surface is loaded by truck into an appropriate bunker. After it is filled, unloading is performed. The raw material through the vibrating feeder (7) enters the vibrating screen (2) and the overload device (3) and is fed to the conveyor (6). The gravestone with a size greater than 400 mm is sent to the crusher (4), crushed and inclined conveyor (5) is fed to the reloading device (3) and to the conveyor (6).

The storage hopper capacity should take into account the maximum replacement capacity of the quarry for each type of raw material to be transported and is calculated from the expression

/ m 3600 m E T KN | KV | 3

V6, p- -, m

(D where m - coefficient taking into account the capacity

bunker in comparison with the interchangeable open-cast mine productivity by type i

.5-1.0,

VCM ppi

where rij - the number of working excavators for the extraction of the 1st type of raw materials, pcs;

E - excavator bucket capacity, m3;

T - the duration of the shift, hour

KN, KP, KV - respectively, the filling ratios of the excavator bucket, loosening of the 1st type of raw material and the use of the excavator in time;

tui - cycle duration, sec.

The discharge time of the bunker is functionally dependent on the performance of the conveyor system and is determined from the expression

tpi min, (2)

60 (0.9V-0.05) 2 V-s

where B is the width of the tape. c is the coefficient depending on the angle of slope of the material on the belt and the angle of inclination of the rollers;

V is the speed of movement of the conveyor belt, m / s.

After the bunker is completely unloaded, at a time interval At, a new bunker is unloaded. The time interval At is required to move the discharge device (1) on the surface to a new point for unloading (Fig. 2).

 you

where 1 | - distance between unloading points of various types of minerals, m; W - speed of movement of the unloading device, m / min, rad / min.

Example. Separate transportation of raw materials from a quarry will be considered on the example of mining the Ingulets iron ore deposit in Kryvbess.

At the concentration horizon of the iron ore deposit, a transshipment point is built, consisting of a storage bin system (Fig. 1).

Migmatites suitable for the production of crushed stone of high grades, amphibolites suitable for stone casting, shale of querz-amphibolite - for the production of crushed stone of low grades are subject to separate storage.

The average annual production of these species, respectively, is: 2.0; 1.0 and 1.5 million m, and replaceable performance is 2.2; 1.1 and 1.65 thousand m3.

The storage capacity of the storage bins is determined from (1). At m 0.5, it varies from 0.6 thousand m3 to 1.1 thousand m3. Accepts for all types of transported raw materials the volume of the storage hopper 2.0 thousand m3, which ensures the normal operation of the mining and transport equipment, as well as the minimum number of turns of the dump equipment for selective unloading.

Bunkers are loaded with 75 ton BelAZ-549 cars. 40 bunker provides full loading of the bunker.

The unloading time of the filled hopper will be determined by the expression (2) and will be at, 5 m / s, B 1.5 m, c 550. For a tray-shaped tape at angles of inclination of the side rollers 20 ° and angles of the material on the belt 20 ° 1 hour 20 min. The unloading raw materials through the PVG-1.4 / 4.0 vibrating feeder (7} with a capacity of 1500 t / h are fed to the vibrating screen (2) and the reloading device (3).

When unloading a full bunker, the performance of the vibrating feeders is 2300 t / h. For unloading, we take two vibropithels PVG - 1.4 / 4.0.

A raw material with a diameter of less than 400 mm enters the conveyor and is transported to the surface. In order to achieve a given performance, an S-160 belt conveyor was taken (belt width 1.5 m, capacity QK 2500 t / h, belt speed 1.5 m / s).

Material with a grain size of more than 400 m at the grate screen enters the crusher. According to the Kryvbass explosion information, the fraction of more than 400 mm does not exceed 10%. Based on the hourly capacity of the feedstock (625 m3 / h), a CCD-12x15 crusher is used with a loading opening size of 1200x1500 mm and a capacity of 280 m3 / h.

Compared with the prototype, the proposed method allows:

1) to avoid the loss of mineral resources;

2) to reduce the area, alienated under the dumps;

3) to obtain additional profit from the sale of by-pass minerals, which will reduce the cost of mining the main mineral (iron ore).

The calculation of the economic efficiency of the use of the proposed method of separate transportation of raw materials with cyclical flow technology.

Calculation of economic efficiency is considered on the example of operation of the Ingulets iron quartzite deposit in Krivbass.

The field is proposed to be developed in a complex, i.e. along with the main mineral, iron ore, associated minerals (PPI), represented by rocks, suitable for the production of various types of building materials, will be processed. Nowadays, PIBs are transported from the quarry to the gross and stored in the dump, where they are irretrievably lost, as raw materials for the construction industry.

The basic object is the method of transportation of minerals from the quarry by conveyor transport (Tarkowski BN and others. Cyclic-point ore mining technology at the Kryvbass open-pit mines. K, Tekhnika. 1978. P.5-11).

The criterion in determining the effectiveness of the proposed method in comparison with the basic object is: reducing the cost of alienating land for dumps - 3i. That is, separately delivered raw materials, which are associated minerals from overburden rocks, are recycled, as well as profits derived from the sale of the resulting marketable products from this raw material.

Э Э1 + Эг, rub.

Reducing the cost of alienation of land is determined from the expression (1).

3i --- j C. rub / year

where V is the annual volume of mined mineral raw materials, m3. For the example in question, V is 4.5 million m3 / year;

d - specific capacity of dumps (According to the NGRI for Krivbass conditions d - 40 m3 / m2);

C is the cost of 1 hectare of land (According to the decree of the Council of Ministers of the Ukrainian SSR of October 11, 1983, No. 429, the cost of 1 hectare of land in the Dnipropetrovsk region is 20100 rubles).

The annual land savings with the use of 4.5 million m3 of raw materials will be 1.25 ha Then the reduction of the cost of land acquisition is 3i 226 thousand rubles.

Profit received from the sale of the finished product from incidentally produced raw materials, „„,

, 32 32 + 32 + 3 2, rub. where Eg is the profit obtained from the sale of high quality crushed stone from migmatites, rub,,,

, 32 V kV (C-C), rub .;

V is the volume of processed migmatites, m; ,

, V 2.0 million m3 / year;

K in - the yield ratio of the finished product (for type I rocks (strong, uniform abrasives) I group (igneous). K 0.9 - Technological design rate of enterprises of the nonmetallic building materials industry, L., Stroyizdat. 1977, 365 s) .

TS.S - price and cost of production of 1 m3 of rubble (According to software PO Dneprunerudprom C 3.2 rubles / m3; C 2.5 rubles / m3}.

Then 3 2 million rubles.

2 1060.9 (3.2 - 2.5) 1.26

Э а - profit, obtained from the sale of amphibolites for stone casting, rub.

"(C-C) rub., Where V is the volume of processed amphibolites,

Vj - 1.0 million m3;

KV - the yield ratio of the finished product, K 0.3;

C and C - the price and cost of stone-made products (according to the NIGRI Institute and for stone-made products from amphibolites of Krivbass C 3.5 rubles / m3, C 75.0 rubles / m3).

Then E (2 - 1.0 106 0.3 (5.0 - 3.5) 0.45

million m3 / year

 - profit obtained from the sale of low-grade crushed stone, from quartz-amphibolite schist, rub,

3w2-V K e (U-C), py6. ,, „

where V is the processing volume of shale, m, V 1,5 million m;

 - the yield coefficient of the finished product (for the rocks of the first type of the second group (metamorphic) K is 0.7);

C, C - price and cost of crushed stone, respectively (according to PO Dnepronerud- prom C, 2.8 rubles / m3, C 2.5 rubles m3). Then, 5 Yub 0.7 (2.8-2.5) 0.305 million rubles / year

32 1.26+ 0.45 + 0.305 2.015 million rubles / year, the overall effect will be

3 0,226 + 2,015 2.241 million rubles / year. The economic effect of the application

Claims (1)

The proposed method compared with the base object will be 2.241 million rubles. Claim method of transportation during cyclic-flow technology works, including the movement of raw materials to the transshipment point, loading the volume of the bunker, unloading it on the transport conveyor, transportation of raw materials with subsequent unloading on the surface, that, in order to ensure the interchangeable output of a quarry for the extraction of raw materials of various compositions while ensuring separate transportation for storage, the number of bunkers is set to the corresponding number of varieties of the transported raw material, loading of the bunker is made of 50-100% of its volume with raw material of one composition, sequential unloading of bunkers , and the bunker is unloaded at a time interval equal to the time of unloading raw materials to a new place on the surface FIG. I Editor .2 Compiled by I.Gumenyuk Tehred M. Morgenthal Proofreader M. Andrushenko