GB 50717-2011Code for extractive metallurgy construction quality acceptance of mechanical equipment installation engineering of heavy non-ferrous metals (English PDF)

1.0.1

This Code is formulated to improve the extractive metallurgy construction quality of mechanical equipment installation engineering of heavy non-ferrous metals, ensure the safe operation of heavy non-ferrous metal smelting equipment, and promote the advancement of installation technology.

1.0.2

This Code applies to the acceptance of quality of installation engineering of pyrometallurgical equipment, hydrometallurgy equipment and dust collecting equipment in heavy non-ferrous metal smelting.

1.0.3

The requirements for installation quality in the engineering technical documents and contracting contracts used in the installation of heavy non-ferrous metal smelting equipment shall not be lower than those specified in this Code.

1.0.4

The installation quality acceptance of heavy nonferrous metal smelting equipment shall not only comply with the provisions of this Code, but also comply with the provisions of the relevant national standards in force.

test records.

3.2.2

The quality of partial projects shall comply with the following requirements.

1 The quality of all itemized projects included in the partial project shall be qualified.

2 The quality assurance information of all itemized projects included in the partial project shall be complete.

3 The inspection and sampling test results of the safety and function of the partial projects shall comply with the relevant provisions of the current national standard GB 50654 "Unified standards for constructional quality acceptance of non-ferrous metals industrial installation engineering".

4 The visual quality acceptance shall comply with the relevant provisions of the current national standard GB 50654 "Unified standards for constructional quality acceptance of non-ferrous metals industrial installation engineering".

3.2.3

The quality of unit projects shall comply with the following provisions.

1 The quality of all partial projects included in the unit project shall be accepted as qualified.

2 Quality control data shall be complete.

3 The inspection data related to safety and function of the partial projects contained in the unit project shall be complete.

4 The spot check results of major functional items shall comply with the relevant provisions of the current national standard GB 50654 "Unified standards for constructional quality acceptance of non-ferrous metals industrial installation engineering".

5 Visual quality acceptance shall meet the requirements.

3.2.4

When the quality of an itemized project does not meet the requirements of the corresponding quality inspection and assessment standards, it must be repaired or reworked in a timely manner. The reworked itemized project shall be re-inspected for quality.

3.2.5

It is strictly prohibited to accept projects if the quality of the project does not meet the requirements of the specifications and the project still cannot meet the safety requirements after processing and rework.

3.3 Procedure and organization of quality inspection

3.3.1

The itemized projects shall be inspected and accepted by the supervision engineer (the project technical person in charge of the construction unit) and the project professional quality (technical) person in charge of the construction unit.

3.3.2

The partial project shall be inspected and accepted by the chief supervisor engineer (the project technical person in charge of the construction unit), the project person in charge of the construction unit, the technical person in charge, and the person in charge of quality, etc.

3.3.3

After the completion of a unit project, the construction unit shall organize relevant personnel to conduct acceptance inspection and submit a project completion acceptance report to the construction unit.

3.3.4

After the construction unit receives the project acceptance report, the person in charge of the construction unit (project) shall organize the persons in charge of the construction, design, supervision and other units (projects) to conduct the unit project acceptance.

3.3.5

After the acceptance of quality for unit project is qualified, the construction unit shall submit the project completion acceptance report and relevant documents to the construction administrative department for filing within the prescribed time.

3.4 Inspection of equipment foundation

I. Dominant items

3.4.1

The strength grade of the equipment foundation shall comply with the requirements of the design documents.

Inspection quantity. All.

Inspection method. Check the basic handover data.

3.4.2

Before the equipment is in place, the center mark plate and elevation reference point layout diagram shall be drawn according to the construction drawing and the measurement control network. The center mark plate and elevation reference point shall be set according to the layout diagram. The projection points shall be measured.

Permanent center mark plates and elevation reference points shall be buried for the main equipment and continuous production lines.

Inspection quantity. All.

Inspection method. Check the measurement results sheet and observe the inspection.

3.4.3

The appearance of the equipment foundation shall not have defects such as cracks, honeycombs, voids, and exposed reinforcement.

Number of inspections. All.

3.5.3

The types, specifications and performance of welding materials shall comply with the design documents and current national standards.

Inspection quantity. All.

Inspection method. Check the exit-factory quality certification documents and welding rod baking records.

3.5.4

The types, specifications and performance of strength bolts shall comply with the design documents and current national product standards. Before construction, the torque coefficient of high-strength large hexagonal head bolts shall be re-tested. The pre-tension (axial force) of torsion shear type high-strength bolts shall be re-tested. The results shall comply with the relevant provisions of the current national standard GB 50205 "Code for acceptance of construction quality of steel structures".

Inspection quantity. Randomly selected from the batch of bolts to be installed, 8 sets of connection pairs in each batch.

Inspection method. Check the exit-factory quality certification documents and re- inspection reports.

3.5.5

Steel materials that fall into any of the following situations shall be sampled and retested. The retest results shall comply with the current national product standards and design document requirements.

1 Steel imported from abroad.

2 Mixed batches of steel.

3 Thick plates with a thickness of 40 mm or more and designed with Z-direction performance requirements.

4 Steel with questionable quality.

5 Steel with design re-inspection requirements.

Inspection quantity. All.

Inspection method. Check the re-inspection report.

II. General items 3.5.6 The thickness of steel plates, the specifications and dimensions of steel sections and their allowable deviations shall comply with the requirements of current national standards.

Number of inspections. Randomly inspect 5 locations of each type and specification of steel plates or steel sections.

Inspection method. Check with steel ruler and vernier caliper.

3.5.7

In addition to complying with the current national standards, the surface quality of steel products shall also comply with the following requirements.

1 When there is rust, pitting or scratches on the surface of steel, the depth shall not be greater than 1/2 of the negative limit of error of the thickness of the steel.

Inspection quantity. All.

Inspection method. Observe and inspect with steel ruler and vernier caliper.

2 The rust grade of the steel surface shall comply with Grade C and above specified in the current national standard GB 8923 "Rust grades and Preparation Grades of Steel

Surfaces before Application".

Inspection quantity. All.

Inspection method. Check with a spatula and check against the pictures specified in the current national standard GB 8923 "Rust grades and Preparation Grades of Steel

Surfaces before Application".

3 There shall be no defects such as cracks or interlayers at the ends or fractures of steel.

Inspection quantity. All.

Inspection method. Observe or inspect with a magnifying glass.

3.6 Welding

3.6.1

Welders must pass an examination and obtain a certificate of qualification.

Certified welders must weld within the items they have passed the examination and the scope of approval.

Inspection quantity. All.

Inspection method. Check welder's qualification certificate.

3.6.2

Before welding, the welding area must be cleaned and the weld groove, gap, misalignment, etc. must be checked to see if they meet the requirements.

Inspection quantity. 10% random inspection, and no less than 3 pieces.

Inspection method. Check the welding process handover card.

3.6.3

The internal quality of the weld must meet the requirements of the design documents.

4.1 General requirement

I. Dominant items

4.1.1

This chapter is applicable to the installation project of heavy non-ferrous metal pyrometallurgical equipment. The installation quality of heavy non-ferrous metal pyrometallurgical equipment shall be implemented in accordance with this specification.

4.1.2 A water pressure test shall be carried out before installing the water-cooling components of a pyrometallurgical furnace. The water pressure test shall be carried out as specified in the design technical documents. If there is no stipulation in the design, the test pressure shall be 1.25 times the working pressure. Maintain the pressure steady for 10 min at the test pressure. Then reduce the test pressure to the working pressure.

Keep the pressure on for 30 min. The test is qualified if there is no pressure drop and no leakage.

Inspection quantity. All.

Inspection method. Observe the inspection. Check pressure test records.

4.1.3

All parts of the oxygen lance of the pyrometallurgical furnace that come into contact with oxygen or oxygen-enriched oxygen must be degreased.

Inspection quantity. All.

Inspection method. Wipe with clean and dry white filter paper or irradiate with ultraviolet light.

4.2 Steam dryer

I. Dominant items

4.2.1

The contact length between the roller and the support wheel shall not be less than

60% of the roller.

Inspection quantity. All the supporting wheels are inspected, and the rollers are inspected at 16 points.

Inspection method. Feeler gauge or coloring method.

4.2.2

The contact area between the ring gear and the pinion gear shall not be less than

40% of the tooth height and 50% of the tooth width.

Number of inspections. 16 points evenly spaced along the circumference of the gear ring.

Inspection method. Coloring method.

4.4.3

The trial operation of the volatilization kiln shall comply with the following provisions.

1 For the volatilization kiln with hydraulic wheel stop system, the kiln body moves up and down along the axial center of the kiln body according to the travel and cycle requirements specified in the design. For the volatilization kiln without hydraulic wheel stop system, the kiln body moves up and down twice within 1 h along the axial center of the kiln body as required. The roller and the supporting wheel are in good contact.

2 The sealing devices of the kiln head hood and kiln tail hood shall be well sealed without abnormal leakage.

3 The time for trial operation shall comply with the following provisions.

1) The main and auxiliary motors run idle for 2 h;

2) The main and auxiliary motors drive the main and auxiliary reducers to operate for 2 h respectively;

3) The kiln trial operation shall meet the design requirements.

Inspection quantity. All.

Inspection method. Check the trial operation records and observe the inspection.

II. General items 4.4.4 The assembly of the roller sliding bearing group shall comply with the requirements of the design and equipment technical documents. If there are no regulations, the following regulations shall apply.

1 The bearing has at least 2 contact points per 25 mm×25 mm area. There is a wedge gap around the bearing. The ball bearing can move freely.

2 The contact points between the back of the bearing and the joint surface of the ball bearing shall be no less than 3 points in every 25 mm×25 mm area and evenly distributed within an angle of 120°.

3 The contact point between the bearing and the supporting wheel shaft shall be no less than 1 point per 1cmn area. The contact angle shall be 60°~75°. The sum of the gaps between the bearings on both sides shall not be less than 12% of the journal diameter.

4 There shall be at least one contact point between the bearing end face and the thrust plate for every 1 cm2 area.

4.9.3

The contact length between the roller and the support wheel shall not be less than

60% of the roller.

Inspection quantity. All the supporting wheels are inspected. The rollers are inspected at 16 points.

Inspection method. Feeler gauge or coloring method.

4.9.4

The contact area between the ring gear and the pinion gear shall not be less than

40% of the tooth height and 50% of the tooth width.

Inspection quantity. 16 points evenly spaced along the circumference of the gear ring.

Inspection method. Coloring method.

4.9.5

The installation of the anode furnace drive device shall be based on the pinion gear. The error of shaft line between the output shaft of the reduction box and the pinion gear shall be adjusted to meet the design requirements.

Inspection quantity. All.

Inspection method. Check the installation records of the gearbox.

4.9.6

The angle between the feed port and the flue end cover shall meet the design requirements.

Inspection quantity. All.

Inspection method. Check the installation records.

4.9.7

The installation angles of burners and nozzles shall meet the design requirements.

Inspection quantity. All.

Inspection method. Check the installation records.

4.9.8

The trial operation of anode furnace shall meet the design requirements.

Inspection quantity. All.

Inspection method. Check the trial operation records.

II. General items 4.9.9 The installation limit of error for the anode furnace support wheel device base shall comply with the requirements of Table 4.9.9.

5.6 Filter

I. Dominant items

5.6.1

Equipment and its parts and components must comply with the design and equipment technical documentation requirements.

Inspection quantity. All.

Inspection method. Check the exit-factory quality certification documents and observe the inspection.

5.6.2

The trial operation of box-type and horizontal plate and frame filter presses shall comply with the requirements of the design and equipment technical documents and shall comply with the following provisions.

1 Start the hydraulic system to drive the cylinder to move the clamping plate forward and backward. Adjust the position of the stroke limit switch to comply with the requirements of the design documents.

2 The pressing plate shall move forward and backward at least 3 times. The pressing plate shall move smoothly. Test the filter plate compression and release. The action shall be flexible and reliable. The moving speed, stroke and pressure of the pressing plate shall comply with the requirements of the design documents.

3 Operate the filter plate transfer device with the clamping plate loosened. Continuously transfer all filter plates. The filter plate transfer shall be smooth. The transfer position shall comply with the design document.

4 The filter cloth vibration device shall be tested when all filter plates are loosened and the filter cake is unloaded. The vibrator working position shall comply with the provisions of the design documents. The vibrator shall work stably without abnormalities.

5 The filter cloth cleaning machine shall be tested in the cleaning state with all filter plates loosened. The adjustment of the stop position and the travel limit switch position shall comply with the provisions of the design documents. The ups and downs and movement of the cleaning nozzle shall be coordinated with each other.

6 The filter cloth cleaning water pan moving trolley shall make at least 3 reciprocating movements within the full stroke. The operation shall be smooth and not stuck on the track. The stop position shall comply with the provisions of the design documents.

Inspection quantity. All.

Inspection method. Observe the inspection, check the track operation records.

5.6.3

The trial operation of the rotary drum vacuum filter shall comply with the requirements of the design and equipment technical documents and shall comply with the following provisions.

5.6.4

The trial operation of the horizontal disc filter shall comply with the requirements of the design and equipment technical documents.

Inspection quantity. All.

Inspection method. Observe the inspection, check the track operation records.

5.6.5

The trial operation of tubular vacuum filter shall comply with the requirements of design and equipment technical documents.

Inspection quantity. All.

Inspection method. Observe the inspection, check the track operation records.

5.6.6

The trial operation of the bucket vacuum filter shall comply with the requirements of the design and equipment technical documents and shall comply with the following provisions.

1 The equipment runs in the correct direction and is irreversible.

2 The speed is adjusted from zero. Test run from low to high step by step. Perform continuous operation for no less than 4 h.

3 The supporting wheel rotates flexibly and has good contact with the track.

4 The filter plate runs smoothly, turns over flexibly, and changes position correctly. The contact between the roller of the flipping fork and the guide track is good.

Inspection quantity. All.

Inspection method. Observe the inspection, check the track operation records.

5.6.7

The trial operation of the belt vacuum filter shall comply with the requirements of the design and equipment technical documents and shall comply with the following

GB/T 50761-2018 | GB 50128-2014 | GB 50959-2013 | GB 50712-2011 | […]